{"pageNumber":"29","pageRowStart":"700","pageSize":"25","recordCount":1766,"records":[{"id":70031691,"text":"70031691 - 2007 - Preliminary identification of ground-water nitrate sources using nitrogen and carbon stable isotopes, Kansas","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70031691","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1358,"text":"Current Research in Earth Sciences","active":true,"publicationSubtype":{"id":10}},"title":"Preliminary identification of ground-water nitrate sources using nitrogen and carbon stable isotopes, Kansas","docAbstract":"Increasing nitrate-N in ground water is a problem in areas with limited ground-water supplies, such as central Kansas. Nitrate-N concentrations in ground water in the study area in Ellis County range from 0.9 to 26 mg/L. Calculated mean values observed in soil cores are 1.2-15 mg/kg. The ??15N signatures of the ground waters are more enriched (+16.8 to +28.7???) than those of the soils (+8.4 to +1 3.7???), strongly suggesting that nitrate-N sources are not from mineralized and labile nitrogen present in the unsaturated zone. Soil cores were collected near municipal wells to determine if soil nitrogen was a contributing source to the ground water. Increased ??15N of total nitrogen with depth suggests that microbial mineralization processes and possible denitrification or volatilization isotope enrichments have affected the observed ?? 15N signatures in the soil. However, the observed soil-nitrogen values are not of sufficient magnitude to explain the nitrate-N concentrations or associated ??15N values observed in the ground water. Stable carbon isotopes provide some supporting evidence that soils are not a major contributor to the observed nitrate-N concentration in the ground water. ?? 13C values of the dissolved organic carbon (DOC) in soils generally become more enriched with depth while corresponding ground-water ??13C (DOC) values are more depleted than in the overlying soils. Carbon isotope values of the soils are indicative of a C4 plant source that is enriched by microbial processes. The ??13C (DOC) of ground water indicates C3 values that may reflect impacts from animal-waste sources.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Current Research in Earth Sciences","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","usgsCitation":"Townsend, M., and Macko, S., 2007, Preliminary identification of ground-water nitrate sources using nitrogen and carbon stable isotopes, Kansas: Current Research in Earth Sciences, v. 253, no. 3.","costCenters":[],"links":[{"id":239906,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"253","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a882ee4b0c8380cd7d783","contributors":{"authors":[{"text":"Townsend, M.A.","contributorId":88785,"corporation":false,"usgs":true,"family":"Townsend","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":432711,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Macko, S.A.","contributorId":105408,"corporation":false,"usgs":true,"family":"Macko","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":432712,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031199,"text":"70031199 - 2007 - Organic petrology of Paleocene Marcelina Formation coals, Paso Diablo mine, western Venezuela: Tectonic controls on coal type","interactions":[],"lastModifiedDate":"2012-03-12T17:21:17","indexId":"70031199","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2033,"text":"International Journal of Coal Geology","active":true,"publicationSubtype":{"id":10}},"title":"Organic petrology of Paleocene Marcelina Formation coals, Paso Diablo mine, western Venezuela: Tectonic controls on coal type","docAbstract":"About 7??Mt of high volatile bituminous coal are produced annually from the four coal zones of the Upper Paleocene Marcelina Formation at the Paso Diablo open-pit mine of western Venezuela. As part of an ongoing coal quality study, we have characterized twenty-two coal channel samples from the mine using organic petrology techniques. Samples also were analyzed for proximate-ultimate parameters, forms of sulfur, free swelling index, ash fusion temperatures, and calorific value. Six of the samples represent incremental benches across the 12-13??m thick No. 4 bed, the stratigraphically lowest mined coal, which is also mined at the 10??km distant Mina Norte open-pit. Organic content of the No. 4 bed indicates an upward increase of woody vegetation and/or greater preservation of organic material throughout the life of the original mire(s). An upward increase in telovitrinite and corresponding decrease in detrovitrinite and inertinite illustrate this trend. In contrast, stratigraphically higher coal groups generally exhibit a 'dulling upward' trend. The generally high inertinite content, and low ash yield and sulfur content, suggest that the Paso Diablo coals were deposited in rain-fed raised mires, protected from clastic input and subjected to frequent oxidation and/or moisture stress. However, the two thinnest coal beds (both 0.7??m thick) are each characterized by lower inertinite and higher telovitrinite content relative to the rest of Paso Diablo coal beds, indicative of less well-established raised mire environments prior to drowning. Foreland basin Paleocene coals of western Venezuela, including the Paso Diablo deposit and time-correlative coal deposits of the Ta??chira and Me??rida Andes, are characterized by high inertinite and consistently lower ash and sulfur relative to Eocene and younger coals of the area. We interpret these age-delimited coal quality characteristics to be due to water availability as a function of the tectonic control of subsidence rate. It is postulated that slower subsidence rates dominated during the Paleocene while greater foreland basin subsidence rates during the Eocene-Miocene resulted from the loading of nappe thrust sheets as part of the main construction phases of the Andean orogen. South-southeastward advance and emplacement of the Lara nappes during the oblique transpressive collision of the Caribbean and South American tectonic plates in the Paleocene was further removed from the sites of peat deposition, resulting in slower subsidence rates. Slower subsidence in the Paleocene may have favored the growth of raised mires, generating higher inertinite concentrations through more frequent moisture stress. Consistently low ash yield and sulfur content would be due to the protection from clastic input in raised mires, in addition to the leaching of mineral matter by rainfall and the development of acidic conditions preventing fixation of sulfur. In contrast, peat mires of Eocene-Miocene age encountered rapid subsidence due to the proximity of nappe emplacement, resulting in lower inertinite content, higher and more variable sulfur content, and higher ash yield.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"International Journal of Coal Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.coal.2006.05.002","issn":"01665162","usgsCitation":"Hackley, P., and Martinez, M., 2007, Organic petrology of Paleocene Marcelina Formation coals, Paso Diablo mine, western Venezuela: Tectonic controls on coal type: International Journal of Coal Geology, v. 71, no. 4, p. 505-526, https://doi.org/10.1016/j.coal.2006.05.002.","startPage":"505","endPage":"526","numberOfPages":"22","costCenters":[],"links":[{"id":238884,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211576,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.coal.2006.05.002"}],"volume":"71","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6fd6e4b0c8380cd75cc4","contributors":{"authors":[{"text":"Hackley, P.C. 0000-0002-5957-2551","orcid":"https://orcid.org/0000-0002-5957-2551","contributorId":60756,"corporation":false,"usgs":true,"family":"Hackley","given":"P.C.","affiliations":[],"preferred":false,"id":430479,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Martinez, M.","contributorId":49910,"corporation":false,"usgs":true,"family":"Martinez","given":"M.","affiliations":[],"preferred":false,"id":430478,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70033246,"text":"70033246 - 2007 - Landscape controls on mercury in streamwater at Acadia National Park, USA","interactions":[],"lastModifiedDate":"2012-03-12T17:21:38","indexId":"70033246","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1552,"text":"Environmental Monitoring and Assessment","onlineIssn":"1573-2959","printIssn":"0167-6369","active":true,"publicationSubtype":{"id":10}},"title":"Landscape controls on mercury in streamwater at Acadia National Park, USA","docAbstract":"Fall and spring streamwater samples were analyzed for total mercury (Hg) and major ions from 47 locations on Mount Desert Island in Maine. Samples were collected in zones that were burned in a major wildfire in 1947 and in zones that were not burned. We hypothesized that Hg concentrations in streamwater would be higher from unburned sites than burned watersheds, because fire would volatilize stored Hg. The Hg concentrations, based on burn history, were not statistically distinct. However, significant statistical associations were noted between Hg and the amount of wetlands in the drainage systems and with streamwater dissolved organic carbon (DOC). An unexpected result was that wetlands mobilized more Hg by generating more DOC in total, but upland DOC was more efficient at transporting Hg because it transports more Hg per unit DOC. Mercury concentrations were higher in samples collected at lower elevations. Mercury was positively correlated with relative discharge, although this effect was not distinguished from the DOC association. In this research, sample site elevation and the presence of upstream wetlands and their associated DOC affected Hg concentrations more strongly than burn history. ?? Springer Science + Business Media B.V. 2007.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Monitoring and Assessment","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10661-006-9334-2","issn":"01676369","usgsCitation":"Peckenham, J., Kahl, J.S., Nelson, S., Johnson, K., and Haines, T., 2007, Landscape controls on mercury in streamwater at Acadia National Park, USA: Environmental Monitoring and Assessment, v. 126, no. 1-3, p. 97-104, https://doi.org/10.1007/s10661-006-9334-2.","startPage":"97","endPage":"104","numberOfPages":"8","costCenters":[],"links":[{"id":213501,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10661-006-9334-2"},{"id":241130,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"126","issue":"1-3","noUsgsAuthors":false,"publicationDate":"2007-02-02","publicationStatus":"PW","scienceBaseUri":"505a4407e4b0c8380cd667bc","contributors":{"authors":[{"text":"Peckenham, J.M.","contributorId":98953,"corporation":false,"usgs":true,"family":"Peckenham","given":"J.M.","affiliations":[],"preferred":false,"id":440001,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kahl, J. S.","contributorId":77885,"corporation":false,"usgs":false,"family":"Kahl","given":"J.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":439999,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nelson, S.J.","contributorId":45901,"corporation":false,"usgs":true,"family":"Nelson","given":"S.J.","email":"","affiliations":[],"preferred":false,"id":439998,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Johnson, K.B.","contributorId":31208,"corporation":false,"usgs":true,"family":"Johnson","given":"K.B.","email":"","affiliations":[],"preferred":false,"id":439997,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Haines, T.A.","contributorId":83062,"corporation":false,"usgs":true,"family":"Haines","given":"T.A.","email":"","affiliations":[],"preferred":false,"id":440000,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70031435,"text":"70031435 - 2007 - Formation and disruption of aquifers in southwestern Chryse Planitia, Mars","interactions":[],"lastModifiedDate":"2012-03-12T17:21:11","indexId":"70031435","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"Formation and disruption of aquifers in southwestern Chryse Planitia, Mars","docAbstract":"We present geologic evidence suggesting that after the development of Mars' cryolithosphere, the formation of aquifers in southwestern Chryse Planitia and their subsequent disruption led to extensive regional resurfacing during the Late Hesperian, and perhaps even during the Amazonian. In our model, these aquifers formed preferentially along thrust faults associated with wrinkle ridges, as well as along fault systems peripheral to impact craters. The characteristics of degraded wrinkle ridges and impact craters in southwestern Chryse Planitia indicate a profound role of subsurface volatiles and especially liquid water in the upper crust (the upper one hundred to a few thousands of meters). Like lunar wrinkle ridges, the martian ones are presumed to mark the surface extensions of thrust faults, but in our study area the wrinkle ridges are heavily modified. Wrinkle ridges and nearby plains have locally undergone collapse, and in other areas they are associated with domical intrusions we interpret as mud volcanoes and mud diapirs. In at least one instance, a sinuous valley emanates from a modified wrinkle ridge, further indicating hydrological influences on these thrust-fault-controlled features. A key must be the formation of volatile-rich crust. Primary crustal formation and differentiation incorporated juvenile volatiles into the global crust, but the crustal record here was then strongly modified by the giant Chryse impact. The decipherable rock record here begins with the Chryse impact and continues with the resulting basin's erosion and infilling, which includes outflow channel activity. We propose that in Simud Vallis surface flow dissection into the base of the cryolithosphere-produced zones where water infiltrated and migrated along SW-dipping strata deformed by the Chryse impact, thereby forming an extensive aquifer in southwestern Chryse Planitia. In this region, compressive stresses produced by the rise of Tharsis led to the formation of wrinkle ridges. Zones of high fracture density within the highly strained planes of the thrust faults underlying the wrinkle ridges formed regions of high permeability; thus, groundwater likely flowed and gathered along these tectonic structures to form zones of elevated permeability. Volatile depletion and migration within the upper crustal materials, predominantly along fault systems, led to structurally controlled episodic resurfacing in southwestern Chryse Planitia. The erosional modification of impact craters in this region is linked to these processes. This erosion is scale independent over a range of crater diameters from a few hundred meters to tens of kilometers. According to our model, pressurized water and sediment intruded and locally extruded and caused crustal subsidence and other degradational activity across this region. The modification of craters across this wide range of sizes, according to our model, implies that there was intensive mobilization of liquid water in the upper crust ranging from about one hundred to several thousand meters deep. ?? 2007 Elsevier Inc. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Icarus","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.icarus.2007.05.021","issn":"00191035","usgsCitation":"Rodriguez, J., Tanaka, K.L., Kargel, J., Dohm, J.M., Kuzmin, R., Fairen, A., Sasaki, S., Komatsu, G., Schulze-Makuch, D., and Jianguo, Y., 2007, Formation and disruption of aquifers in southwestern Chryse Planitia, Mars: Icarus, v. 191, no. 2, p. 545-567, https://doi.org/10.1016/j.icarus.2007.05.021.","startPage":"545","endPage":"567","numberOfPages":"23","costCenters":[],"links":[{"id":212234,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.icarus.2007.05.021"},{"id":239692,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"191","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a1346e4b0c8380cd545b2","contributors":{"authors":[{"text":"Rodriguez, J.A.P.","contributorId":55948,"corporation":false,"usgs":true,"family":"Rodriguez","given":"J.A.P.","email":"","affiliations":[],"preferred":false,"id":431484,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tanaka, K. L.","contributorId":31394,"corporation":false,"usgs":false,"family":"Tanaka","given":"K.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":431482,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kargel, J.S.","contributorId":88096,"corporation":false,"usgs":true,"family":"Kargel","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":431488,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Dohm, J. M.","contributorId":102150,"corporation":false,"usgs":true,"family":"Dohm","given":"J.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":431490,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Kuzmin, R.","contributorId":62828,"corporation":false,"usgs":true,"family":"Kuzmin","given":"R.","email":"","affiliations":[],"preferred":false,"id":431485,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Fairen, A.G.","contributorId":25335,"corporation":false,"usgs":true,"family":"Fairen","given":"A.G.","email":"","affiliations":[],"preferred":false,"id":431481,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Sasaki, S.","contributorId":78534,"corporation":false,"usgs":true,"family":"Sasaki","given":"S.","email":"","affiliations":[],"preferred":false,"id":431487,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Komatsu, G.","contributorId":35913,"corporation":false,"usgs":true,"family":"Komatsu","given":"G.","email":"","affiliations":[],"preferred":false,"id":431483,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Schulze-Makuch, D.","contributorId":62829,"corporation":false,"usgs":true,"family":"Schulze-Makuch","given":"D.","affiliations":[],"preferred":false,"id":431486,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Jianguo, Y.","contributorId":101454,"corporation":false,"usgs":true,"family":"Jianguo","given":"Y.","email":"","affiliations":[],"preferred":false,"id":431489,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}}
,{"id":70033056,"text":"70033056 - 2007 - Conversations on the habitability of worlds: The importance of volatiles","interactions":[],"lastModifiedDate":"2012-03-12T17:21:39","indexId":"70033056","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3454,"text":"Space Science Reviews","active":true,"publicationSubtype":{"id":10}},"title":"Conversations on the habitability of worlds: The importance of volatiles","docAbstract":"Our scientific forefathers discuss the interrelationships between water, climate, the atmosphere, and life on Earth and other terrestrial planets at a workshop in Nichtcha??tel, Switzerland. ?? 2007 Springer Science+Business Media B.V.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Space Science Reviews","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s11214-007-9193-3","issn":"00386308","usgsCitation":"Bertaux, J., Carr, M., Des Marais, D., and Gaidos, E., 2007, Conversations on the habitability of worlds: The importance of volatiles: Space Science Reviews, v. 129, no. 1-3, p. 123-165, https://doi.org/10.1007/s11214-007-9193-3.","startPage":"123","endPage":"165","numberOfPages":"43","costCenters":[],"links":[{"id":213241,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s11214-007-9193-3"},{"id":240847,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"129","issue":"1-3","noUsgsAuthors":false,"publicationDate":"2007-06-26","publicationStatus":"PW","scienceBaseUri":"5059fbd8e4b0c8380cd4dfdd","contributors":{"authors":[{"text":"Bertaux, J.-L.","contributorId":35128,"corporation":false,"usgs":true,"family":"Bertaux","given":"J.-L.","email":"","affiliations":[],"preferred":false,"id":439185,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Carr, M.","contributorId":105845,"corporation":false,"usgs":true,"family":"Carr","given":"M.","affiliations":[],"preferred":false,"id":439188,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Des Marais, D.J.","contributorId":84075,"corporation":false,"usgs":true,"family":"Des Marais","given":"D.J.","affiliations":[],"preferred":false,"id":439187,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gaidos, E.","contributorId":62414,"corporation":false,"usgs":true,"family":"Gaidos","given":"E.","email":"","affiliations":[],"preferred":false,"id":439186,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031992,"text":"70031992 - 2007 - Effects of acid-volatile sulfide on metal bioavailability and toxicity to midge (Chironomus tentans) larvae in black shale sediments","interactions":[],"lastModifiedDate":"2012-03-12T17:21:27","indexId":"70031992","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1571,"text":"Environmental Toxicology and Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Effects of acid-volatile sulfide on metal bioavailability and toxicity to midge (Chironomus tentans) larvae in black shale sediments","docAbstract":"Metal bioavailability and toxicity to aquatic organisms are greatly affected by variables such as pH, hardness, organic matter, and sediment acid-volatile sulfide (AVS). Sediment AVS, which reduces metal bioavailability and toxicity by binding and immobilizing metals as insoluble sulfides, has been studied intensely in recent years. Few studies, however, have determined the spatial variability of AVS and its interaction with simultaneously extracted metals (SEM) in sediments containing elevated concentrations of metals resulting from natural geochemical processes, such as weathering of black shales. We collected four sediment samples from each of four headwater bedrock streams in northcentral Arkansa (USA; three black shale-draining streams and one limestone-draining stream). We conducted 10-d acute whole-sediment toxicity tests using the midge Chironomus tentans and performed analyses for AVS, total metals, SEMs, and organic carbon. Most of the sediments from shale-draining streams had similar total metal and SEM concentrations but considerable differences in organic carbon and AVS. Zinc was the leading contributor to the SEM molar sum, averaging between 68 and 74%, whereas lead and cadmium contributed less than 3%. The AVS concentration was very low in all but two samples from one of the shale streams, and the sum of the SEM concentrations was in molar excess of AVS for all shale stream sediments. No significant differences in mean AVS concentrations between sediments collected from shale-draining or limestone-draining sites were noted (p > 0.05). Midge survival and growth in black shale-derived sediments were significantly less (p < 0.001) than that of limestone-derived sediments. On the whole, either SEM alone or SEM-AVS explained the total variation in midge survival and growth about equally well. However, survival and growth were significantly greater (p < 0.05) in the two sediment samples that contained measurable AVS compared with the two sediments from the same stream that contained negligible AVS. ?? 2007 SETAC.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Toxicology and Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1897/06-080R.1","issn":"07307268","usgsCitation":"Ogendi, G., Brumbaugh, W.G., Hannigan, R., and Farris, J., 2007, Effects of acid-volatile sulfide on metal bioavailability and toxicity to midge (Chironomus tentans) larvae in black shale sediments: Environmental Toxicology and Chemistry, v. 26, no. 2, p. 325-334, https://doi.org/10.1897/06-080R.1.","startPage":"325","endPage":"334","numberOfPages":"10","costCenters":[],"links":[{"id":214811,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1897/06-080R.1"},{"id":242563,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"26","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-02-01","publicationStatus":"PW","scienceBaseUri":"505a0679e4b0c8380cd5126f","contributors":{"authors":[{"text":"Ogendi, G.M.","contributorId":39600,"corporation":false,"usgs":true,"family":"Ogendi","given":"G.M.","email":"","affiliations":[],"preferred":false,"id":434025,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Brumbaugh, W. G.","contributorId":106441,"corporation":false,"usgs":true,"family":"Brumbaugh","given":"W.","email":"","middleInitial":"G.","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":434028,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hannigan, R.E.","contributorId":55226,"corporation":false,"usgs":true,"family":"Hannigan","given":"R.E.","email":"","affiliations":[],"preferred":false,"id":434026,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Farris, J.L.","contributorId":88849,"corporation":false,"usgs":true,"family":"Farris","given":"J.L.","email":"","affiliations":[],"preferred":false,"id":434027,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70031224,"text":"70031224 - 2007 - Drying temperature effects on fish dry mass measurements","interactions":[],"lastModifiedDate":"2016-04-29T08:45:23","indexId":"70031224","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2330,"text":"Journal of Great Lakes Research","active":true,"publicationSubtype":{"id":10}},"title":"Drying temperature effects on fish dry mass measurements","docAbstract":"<p>Analysis of tissue composition in fish often requires dry samples. Time needed to dry fish decreases as temperature is increased, but additional volatile material may be lost. Effects of 10??C temperature increases on percentage dry mass (%DM) were tested against 60??C controls for groups of lake trout Salvelinus namaycush, rainbow smelt Osmerus mordax, slimy sculpin Cottus cognatus, and alewife Alosa pseudoharengus. Lake trout %DMs were lower at greater temperatures, but not significantly different from 60??C controls. Rainbow smelt and slimy sculpin %DMs were lower at greater temperatures and differences were significant when test temperatures reached 90??C. Significant differences were not found in tests using alewives because variability in %DM was high between fish. To avoid inter-fish variability, 30 alewives were each dried successively at 60, 70, 80, and then 90??C and for all fish %DM declined at each higher temperature. In general, %DMs were lower at greater temperatures and after reaching a stable dry weight, fish did not lose additional mass if temperature remained constant. Results indicate that caution should be used when comparing dry mass related indices from fish dried at different temperatures because %DM was negatively related to temperature. The differences in %DM observed with rising temperature could account for substantial portions of the variability in reported energy values for the species tested. Differences in %DM means for the 60 vs. 80??C and 60 vs. 90??C tests for rainbow smelt and alewife could represent of from 8 to 38% of observed annual energy cycles for Lakes Ontario and Michigan.</p>","language":"English","publisher":"International Association for Great Lakes Research","doi":"10.3394/0380-1330(2007)33[606:DTEOFD]2.0.CO;2","issn":"03801330","usgsCitation":"Lantry, B., and O'Gorman, R., 2007, Drying temperature effects on fish dry mass measurements: Journal of Great Lakes Research, v. 33, no. 3, p. 606-616, https://doi.org/10.3394/0380-1330(2007)33[606:DTEOFD]2.0.CO;2.","productDescription":"11 p.","startPage":"606","endPage":"616","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":324,"text":"Great Lakes Science Center","active":true,"usgs":true}],"links":[{"id":238548,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211283,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.3394/0380-1330(2007)33[606:DTEOFD]2.0.CO;2"}],"volume":"33","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0404e4b0c8380cd50743","contributors":{"authors":[{"text":"Lantry, B.F.","contributorId":19105,"corporation":false,"usgs":true,"family":"Lantry","given":"B.F.","email":"","affiliations":[],"preferred":false,"id":430597,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"O'Gorman, R.","contributorId":48896,"corporation":false,"usgs":true,"family":"O'Gorman","given":"R.","affiliations":[],"preferred":false,"id":430598,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031253,"text":"70031253 - 2007 - Input, flux, and persistence of six select pesticides in San Francisco Bay","interactions":[],"lastModifiedDate":"2018-10-17T09:43:05","indexId":"70031253","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2040,"text":"International Journal of Environmental Analytical Chemistry","active":true,"publicationSubtype":{"id":10}},"title":"Input, flux, and persistence of six select pesticides in San Francisco Bay","docAbstract":"<p>Temporal patterns of pesticide inputs to San Francisco Bay were identified and correlated with timing of application and transport mechanism. Fluxes were calculated from measured concentrations and estimated flow. Persistence of the pesticides under typical riverine or estuarine conditions were estimated from laboratory experiments. Simazine was detected most frequently and had the highest flux into the Bay, which could be explained by its continuous use and long half-life. In comparison, diazinon was detected at lower concentrations and had a lower flux which corresponded to its lower use and shorter half-life. The order-of-magnitude lower fluxes of carbofuran and methidathion corresponded to their lower use and expected hydrolysis. Molinate was detected at the highest concentration but its flux was lower than expected, considering its very high use and persistence in the laboratory experiments. Additional loss of molinate is likely to occur from volatilization and photodegradation on the rice fields. Although thiobencarb had the second highest use, it had the lowest flux of the six pesticides, which can be attributed to its loss via hydrolysis, photodegradation, volatilization, and sorption to sediments. Fluxes into San Francisco Bay were equal to or greater than those reported for other estuaries, except for the Gulf of Mexico.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"International Journal of Environmental Analytical Chemistry","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1080/03067310701619014","issn":"03067319","usgsCitation":"Kuivila, K., and Jennings, B., 2007, Input, flux, and persistence of six select pesticides in San Francisco Bay: International Journal of Environmental Analytical Chemistry, v. 87, no. 13-14, p. 897-911, https://doi.org/10.1080/03067310701619014.","productDescription":"15 p.","startPage":"897","endPage":"911","numberOfPages":"15","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":238620,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211345,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1080/03067310701619014"}],"country":"United States","state":"California","city":"San Francisco","otherGeospatial":"San Francisco Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -122.64862060546875,\n              37.391981943533544\n            ],\n            [\n              -121.74362182617188,\n              37.391981943533544\n            ],\n            [\n              -121.74362182617188,\n              38.238180119798635\n            ],\n            [\n              -122.64862060546875,\n              38.238180119798635\n            ],\n            [\n              -122.64862060546875,\n              37.391981943533544\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"87","issue":"13-14","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3c10e4b0c8380cd62a40","contributors":{"authors":[{"text":"Kuivila, Kathryn 0000-0001-7940-489X kkuivila@usgs.gov","orcid":"https://orcid.org/0000-0001-7940-489X","contributorId":190790,"corporation":false,"usgs":true,"family":"Kuivila","given":"Kathryn","email":"kkuivila@usgs.gov","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":518,"text":"Oregon Water Science Center","active":true,"usgs":true}],"preferred":true,"id":430746,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jennings, B.E.","contributorId":44050,"corporation":false,"usgs":true,"family":"Jennings","given":"B.E.","email":"","affiliations":[],"preferred":false,"id":430747,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70030084,"text":"70030084 - 2007 - Chemistry of thermally altered high volatile bituminous coals from southern Indiana","interactions":[],"lastModifiedDate":"2012-03-12T17:21:09","indexId":"70030084","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2033,"text":"International Journal of Coal Geology","active":true,"publicationSubtype":{"id":10}},"title":"Chemistry of thermally altered high volatile bituminous coals from southern Indiana","docAbstract":"The optical properties and chemical characteristics of two thermally altered Pennsylvanian high volatile bituminous coals, the non-coking Danville Coal Member (Ro = 0.55%) and the coking Lower Block Coal Member (Ro = 0.56%) were investigated with the purpose of understanding differences in their coking behavior. Samples of the coals were heated to temperatures of 275????C, 325????C, 375????C and 425????C, with heating times of up to one hour. Vitrinite reflectance (Ro%) rises with temperature in both coals, with the Lower Block coal exhibiting higher reflectance at 375????C and 425????C compared to the Danville coal. Petrographic changes include the concomitant disappearance of liptinites and development of vesicles in vitrinites in both coals, although neither coal developed anisotropic coke texture. At 375????C, the Lower Block coal exhibits a higher aromatic ratio, higher reflectance, higher carbon content, and lower oxygen content, all of which indicate a greater degree of aromatization at this temperature. The Lower Block coal maintains a higher CH2/CH3 ratio than the Danville coal throughout the heating experiment, indicating that the long-chain unbranched aliphatics contained in Lower Block coal liptinites are more resistant to decomposition. As the Lower Block coal contains significant amounts of liptinite (23.6%), the contribution of aliphatics from these liptinites appears to be the primary cause of its large plastic range and high fluidity. ?? 2006 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"International Journal of Coal Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.coal.2006.06.009","issn":"01665162","usgsCitation":"Walker, R., Mastalerz, M., Brassell, S., Elswick, E., Hower, J., and Schimmelmann, A., 2007, Chemistry of thermally altered high volatile bituminous coals from southern Indiana: International Journal of Coal Geology, v. 71, no. 1 SPEC. ISS., p. 2-14, https://doi.org/10.1016/j.coal.2006.06.009.","startPage":"2","endPage":"14","numberOfPages":"13","costCenters":[],"links":[{"id":212936,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.coal.2006.06.009"},{"id":240504,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"71","issue":"1 SPEC. ISS.","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f5aee4b0c8380cd4c36e","contributors":{"authors":[{"text":"Walker, R.","contributorId":64182,"corporation":false,"usgs":true,"family":"Walker","given":"R.","affiliations":[],"preferred":false,"id":425642,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mastalerz, Maria","contributorId":78065,"corporation":false,"usgs":true,"family":"Mastalerz","given":"Maria","affiliations":[],"preferred":false,"id":425643,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Brassell, S.","contributorId":101461,"corporation":false,"usgs":true,"family":"Brassell","given":"S.","email":"","affiliations":[],"preferred":false,"id":425645,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Elswick, E.","contributorId":42788,"corporation":false,"usgs":true,"family":"Elswick","given":"E.","affiliations":[],"preferred":false,"id":425641,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Hower, J.C.","contributorId":100541,"corporation":false,"usgs":true,"family":"Hower","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":425644,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Schimmelmann, A.","contributorId":28348,"corporation":false,"usgs":false,"family":"Schimmelmann","given":"A.","affiliations":[],"preferred":false,"id":425640,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70030198,"text":"70030198 - 2007 - Factors associated with sources, transport, and fate of volatile organic compounds and their mixtures in aquifers of the United States","interactions":[],"lastModifiedDate":"2012-03-12T17:21:01","indexId":"70030198","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Factors associated with sources, transport, and fate of volatile organic compounds and their mixtures in aquifers of the United States","docAbstract":"Factors associated with sources, transport, and fate of volatile organic compounds (VOCs) in groundwater from aquifers throughout the United States were evaluated using statistical methods. Samples were collected from 1631 wells throughout the conterminous United States between 1996 and 2002 as part of the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey. Water samples from wells completed in aquifers used to supply drinking water were analyzed for more than 50 VOCs. Wells were primarily rural domestic water supplies (1184), followed by public water supplies (216); the remaining wells (231) supplied a variety of uses. The median well depth was 50 meters. Age-date information shows that about 60% of the samples had a fraction of water recharged after 1953. Chloroform, toluene, 1,2,4-trimethylbenzene, and perchloroethene were some of the frequently detected VOCs. Concentrations generally were less than 1 ??g/L. Source factors include, in order of importance, general land-use activity, septic/sewer density, and sites where large concentrations of VOCs are potentially released, such as leaking underground storage tanks. About 10% of all samples had VOC mixtures that were associated with concentrated sources; 20% were associated with dispersed sources. Important transport factors included well/screen depth, precipitation/groundwater recharge, air temperature, and various soil characteristics. Dissolved oxygen was strongly associated with VOCs and represents the fate of many VOCs in groundwater. Well type (domestic or public water supply) was also an important explanatory factor. Results of multiple analyses show the importance of (1) accounting for both dispersed and concentrated sources of VOCs, (2) measuring dissolved oxygen when sampling wells to help explain the fate of VOCs, and (3) limiting the type of wells sampled in monitoring networks to avoid unnecessary variance in the data, or controlling for this variance during data analysis.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Science and Technology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1021/es061079w","issn":"0013936X","usgsCitation":"Squillace, P.J., and Moran, M., 2007, Factors associated with sources, transport, and fate of volatile organic compounds and their mixtures in aquifers of the United States: Environmental Science & Technology, v. 41, no. 7, p. 2123-2130, https://doi.org/10.1021/es061079w.","startPage":"2123","endPage":"2130","numberOfPages":"8","costCenters":[],"links":[{"id":239086,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":211738,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/es061079w"}],"volume":"41","issue":"7","noUsgsAuthors":false,"publicationDate":"2007-03-06","publicationStatus":"PW","scienceBaseUri":"505a0eb4e4b0c8380cd535a3","contributors":{"authors":[{"text":"Squillace, P. J.","contributorId":8878,"corporation":false,"usgs":true,"family":"Squillace","given":"P.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":426098,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Moran, M.J.","contributorId":7862,"corporation":false,"usgs":true,"family":"Moran","given":"M.J.","email":"","affiliations":[],"preferred":false,"id":426097,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70031997,"text":"70031997 - 2007 - Controls on mercury and methylmercury deposition for two watersheds in Acadia National Park, Maine","interactions":[],"lastModifiedDate":"2012-03-12T17:21:26","indexId":"70031997","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1552,"text":"Environmental Monitoring and Assessment","onlineIssn":"1573-2959","printIssn":"0167-6369","active":true,"publicationSubtype":{"id":10}},"title":"Controls on mercury and methylmercury deposition for two watersheds in Acadia National Park, Maine","docAbstract":"Throughfall and bulk precipitation samples were collected for two watersheds at Acadia National Park, Maine, from 3 May to 16 November 2000, to determine which landscape factors affected mercury (Hg) deposition. One of these watersheds, Cadillac Brook, burned in 1947, providing a natural experimental design to study the effects of forest type on deposition to forested watersheds. Sites that face southwest received the highest Hg deposition, which may be due to the interception of cross-continental movement of contaminated air masses. Sites covered with softwood vegetation also received higher Hg deposition than other vegetation types because of the higher scavenging efficiency of the canopy structure. Methyl mercury (MeHg) deposition was not affected by these factors. Hg deposition, as bulk precipitation and throughfall was lower in Cadillac Brook watershed (burned) than in Hadlock Brook watershed (unburned) because of vegetation type and watershed aspect. Hg and MeHg inputs were weighted by season and vegetation type because these two factors had the most influence on deposition. Hg volatilization was not determined. The total Hg deposition via throughfall and bulk precipitation was 9.4 ??g/m2/year in Cadillac Brook watershed and 10.2 ??g/m2/year in Hadlock Brook watershed. The total MeHg deposition via throughfall and bulk precipitation was 0.05 ??g/m2/year in Cadillac Brook watershed and 0.10 ??g/m2/year in Hadlock Brook watershed. ?? Springer Science + Business Media B.V. 2006.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Monitoring and Assessment","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1007/s10661-006-9331-5","issn":"01676369","usgsCitation":"Johnson, K., Haines, T., Kahl, J.S., Norton, S.A., Amirbahman, A., and Sheehan, K., 2007, Controls on mercury and methylmercury deposition for two watersheds in Acadia National Park, Maine: Environmental Monitoring and Assessment, v. 126, no. 1-3, p. 55-67, https://doi.org/10.1007/s10661-006-9331-5.","startPage":"55","endPage":"67","numberOfPages":"13","costCenters":[],"links":[{"id":214928,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/s10661-006-9331-5"},{"id":242689,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"126","issue":"1-3","noUsgsAuthors":false,"publicationDate":"2006-10-21","publicationStatus":"PW","scienceBaseUri":"5059fbd1e4b0c8380cd4dfa1","contributors":{"authors":[{"text":"Johnson, K.B.","contributorId":31208,"corporation":false,"usgs":true,"family":"Johnson","given":"K.B.","email":"","affiliations":[],"preferred":false,"id":434066,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Haines, T.A.","contributorId":83062,"corporation":false,"usgs":true,"family":"Haines","given":"T.A.","email":"","affiliations":[],"preferred":false,"id":434069,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kahl, J. S.","contributorId":77885,"corporation":false,"usgs":false,"family":"Kahl","given":"J.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":434068,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Norton, S. A.","contributorId":32223,"corporation":false,"usgs":true,"family":"Norton","given":"S.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":434067,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Amirbahman, A.","contributorId":25111,"corporation":false,"usgs":true,"family":"Amirbahman","given":"A.","affiliations":[],"preferred":false,"id":434065,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Sheehan, K.D.","contributorId":13826,"corporation":false,"usgs":true,"family":"Sheehan","given":"K.D.","email":"","affiliations":[],"preferred":false,"id":434064,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70031806,"text":"70031806 - 2007 - Evidence for and implications of sedimentary diapirism and mud volcanism in the southern Utopia highland-lowland boundary plain, Mars","interactions":[],"lastModifiedDate":"2018-12-05T08:55:58","indexId":"70031806","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"Evidence for and implications of sedimentary diapirism and mud volcanism in the southern Utopia highland-lowland boundary plain, Mars","docAbstract":"<p><span>Several types of spatially associated landforms in the southern Utopia Planitia highland–lowland boundary (HLB)&nbsp;plain&nbsp;appear to have resulted from localized geologic activity, including (1) fractured rises, (2) elliptical mounds, (3) pitted cones with emanating lobate materials, and (4) isolated and coalesced cavi (depressions). Stratigraphic analysis indicates these features are Hesperian or younger and may be associated with resurfacing that preferentially destroyed smaller (</span><span class=\"math\"><span id=\"MathJax-Element-1-Frame\" class=\"MathJax_SVG\" data-mathml=\"<math xmlns=&quot;http://www.w3.org/1998/Math/MathML&quot;><mo is=&quot;true&quot;>&amp;lt;</mo><mn is=&quot;true&quot;>8</mn><mtext is=&quot;true&quot;></mtext><mtext is=&quot;true&quot;>km</mtext></math>\"><span class=\"MJX_Assistive_MathML\">&lt;8km</span></span></span><span>&nbsp;diameter) impact&nbsp;craters. Based on landform geomorphologies and&nbsp;spatial distributions, the documented features do not appear to be specifically related to igneous or&nbsp;periglacial processes&nbsp;or the back-wasting and erosion of the HLB&nbsp;scarp. We propose that these features are genetically related to and formed by sedimentary (mud)&nbsp;diapirs&nbsp;that ascended from zones of regionally confined, poorly consolidated, and mechanically weak material. We note morphologic similarities between the mounds and pitted cones of the southern Utopia boundary plain and terrestrial mud&nbsp;volcanoes&nbsp;in the Absheron&nbsp;Peninsula,&nbsp;Azerbaijan. These analogs provide a context for understanding the geological environments and processes that supported mud diapir-related modification of the HLB. In southern Utopia, mud diapirs near the Elysium volcanic edifice may have resulted in laccolith-like intrusions that produced the fractured rises, while in the central boundary plain mud diapirs could have extruded to form pitted cones, mounds, and lobate flows, perhaps related to compressional stresses that account for wrinkle ridges. The removal of material a few kilometers deep by diapiric processes may have resulted in&nbsp;subsidence&nbsp;and deformation of surface materials to form widespread cavi. Collectively, these inferences suggest that sedimentary&nbsp;diapirism&nbsp;and mud&nbsp;volcanism&nbsp;as well as related surface deformations could have been the dominant Hesperian mechanisms that altered the regional boundary plain. We discuss a model in which&nbsp;detritus&nbsp;would have accumulated thickly in the annular spaces between impact-generated structural rings of Utopia basin. We envision that these materials, and perhaps buried&nbsp;ejecta&nbsp;of Utopia basin, contained volatile-rich,&nbsp;low-density material&nbsp;that could provide the source material for the postulated sedimentary diapirs. Thick, water-rich, low-density sediments buried elsewhere along the HLB and within the lowland plains may account for similar landforms and resurfacing histories.</span></p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Icarus","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","doi":"10.1016/j.icarus.2006.08.013","issn":"00191035","usgsCitation":"Skinner, J., and Tanaka, K.L., 2007, Evidence for and implications of sedimentary diapirism and mud volcanism in the southern Utopia highland-lowland boundary plain, Mars: Icarus, v. 186, no. 1, p. 41-59, https://doi.org/10.1016/j.icarus.2006.08.013.","productDescription":"19 p.","startPage":"41","endPage":"59","numberOfPages":"19","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":239680,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Mars; Utopia Planitia","volume":"186","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0d36e4b0c8380cd52e9b","contributors":{"authors":[{"text":"Skinner, James A. 0000-0002-3644-7010 jskinner@usgs.gov","orcid":"https://orcid.org/0000-0002-3644-7010","contributorId":3187,"corporation":false,"usgs":true,"family":"Skinner","given":"James A.","email":"jskinner@usgs.gov","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":433207,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tanaka, Kenneth L. ktanaka@usgs.gov","contributorId":610,"corporation":false,"usgs":true,"family":"Tanaka","given":"Kenneth","email":"ktanaka@usgs.gov","middleInitial":"L.","affiliations":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"preferred":true,"id":433206,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70030059,"text":"70030059 - 2007 - Possible ancient giant basin and related water enrichment in the Arabia Terra province, Mars","interactions":[],"lastModifiedDate":"2012-03-12T17:21:36","indexId":"70030059","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1963,"text":"Icarus","active":true,"publicationSubtype":{"id":10}},"title":"Possible ancient giant basin and related water enrichment in the Arabia Terra province, Mars","docAbstract":"A circular albedo feature in the Arabia Terra province was first hypothesized as an ancient impact basin using Viking-era information. To test this unpublished hypothesis, we have analyzed the Viking era-information together with layers of new data derived from the Mars Global Surveyor (MGS) and Mars Odyssey (MO) missions. Our analysis indicates that Arabia Terra is an ancient geologic province of Mars with many distinct characteristics, including predominantly Noachian materials, a unique part of the highland-lowland boundary, a prominent paleotectonic history, the largest region of fretted terrain on the planet, outflow channels with no obvious origins, extensive exposures of eroded layered sedimentary deposits, and notable structural, albedo, thermal inertia, gravity, magnetic, and elemental signatures. The province also is marked by special impact crater morphologies, which suggest a persistent volatile-rich substrate. No one characteristic provides definitive answers to the dominant event(s) that shaped this unique province. Collectively the characteristics reported here support the following hypothesized sequence of events in Arabia Terra: (1) an enormous basin, possibly of impact origin, formed early in martian history when the magnetic dynamo was active and the lithosphere was relatively thin, (2) sediments and other materials were deposited in the basin during high erosion rates while maintaining isostatic equilibrium, (3) sediments became water enriched during the Noachian Period, and (4) basin materials were uplifted in response to the growth of the Tharsis Bulge, resulting in differential erosion exposing ancient stratigraphic sequences. Parts of the ancient basin remain water-enriched to the present day. ?? 2007 Elsevier Inc. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Icarus","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.icarus.2007.03.006","issn":"00191035","usgsCitation":"Dohm, J.M., Barlow, N., Anderson, R.C., Williams, J., Miyamoto, H., Ferris, J., Strom, R., Taylor, G., Fairen, A., Baker, V., Boynton, W.V., Keller, J., Kerry, K., Janes, D., Rodriguez, J., and Hare, T., 2007, Possible ancient giant basin and related water enrichment in the Arabia Terra province, Mars: Icarus, v. 190, no. 1, p. 74-92, https://doi.org/10.1016/j.icarus.2007.03.006.","startPage":"74","endPage":"92","numberOfPages":"19","costCenters":[],"links":[{"id":213048,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.icarus.2007.03.006"},{"id":240628,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"190","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7e10e4b0c8380cd7a305","contributors":{"authors":[{"text":"Dohm, J. M.","contributorId":102150,"corporation":false,"usgs":true,"family":"Dohm","given":"J.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":425551,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Barlow, N.G.","contributorId":107466,"corporation":false,"usgs":true,"family":"Barlow","given":"N.G.","email":"","affiliations":[],"preferred":false,"id":425552,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Anderson, R. C.","contributorId":9755,"corporation":false,"usgs":true,"family":"Anderson","given":"R.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":425537,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Williams, J.-P.","contributorId":49185,"corporation":false,"usgs":true,"family":"Williams","given":"J.-P.","email":"","affiliations":[],"preferred":false,"id":425545,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Miyamoto, H.","contributorId":56831,"corporation":false,"usgs":true,"family":"Miyamoto","given":"H.","email":"","affiliations":[],"preferred":false,"id":425547,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Ferris, J.C.","contributorId":13731,"corporation":false,"usgs":true,"family":"Ferris","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":425538,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Strom, R.G.","contributorId":45744,"corporation":false,"usgs":true,"family":"Strom","given":"R.G.","email":"","affiliations":[],"preferred":false,"id":425542,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Taylor, G.J.","contributorId":76927,"corporation":false,"usgs":true,"family":"Taylor","given":"G.J.","email":"","affiliations":[],"preferred":false,"id":425548,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Fairen, A.G.","contributorId":25335,"corporation":false,"usgs":true,"family":"Fairen","given":"A.G.","email":"","affiliations":[],"preferred":false,"id":425539,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Baker, V.R.","contributorId":47079,"corporation":false,"usgs":true,"family":"Baker","given":"V.R.","email":"","affiliations":[],"preferred":false,"id":425544,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Boynton, W. V.","contributorId":44274,"corporation":false,"usgs":false,"family":"Boynton","given":"W.","email":"","middleInitial":"V.","affiliations":[],"preferred":false,"id":425541,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Keller, J.M.","contributorId":87370,"corporation":false,"usgs":true,"family":"Keller","given":"J.M.","email":"","affiliations":[],"preferred":false,"id":425549,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Kerry, K.","contributorId":45905,"corporation":false,"usgs":true,"family":"Kerry","given":"K.","email":"","affiliations":[],"preferred":false,"id":425543,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Janes, D.","contributorId":89355,"corporation":false,"usgs":true,"family":"Janes","given":"D.","email":"","affiliations":[],"preferred":false,"id":425550,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Rodriguez, J.A.P.","contributorId":55948,"corporation":false,"usgs":true,"family":"Rodriguez","given":"J.A.P.","email":"","affiliations":[],"preferred":false,"id":425546,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"Hare, T.M. 0000-0001-8842-389X","orcid":"https://orcid.org/0000-0001-8842-389X","contributorId":43828,"corporation":false,"usgs":true,"family":"Hare","given":"T.M.","affiliations":[],"preferred":false,"id":425540,"contributorType":{"id":1,"text":"Authors"},"rank":16}]}}
,{"id":70033163,"text":"70033163 - 2007 - Chlorinated solvents in groundwater of the United States","interactions":[],"lastModifiedDate":"2012-03-12T17:21:34","indexId":"70033163","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1565,"text":"Environmental Science & Technology","onlineIssn":"1520-5851","printIssn":"0013-936X","active":true,"publicationSubtype":{"id":10}},"title":"Chlorinated solvents in groundwater of the United States","docAbstract":"Four chlorinated solvents-methylene chloride, perchloroethene (PCE), 1,1,1-trichloroethane, and trichloroethene (TCE)-were analyzed in samples of groundwater taken throughout the conterminous United States by the U.S. Geological Survey. The samples were collected between 1985 and 2002 from more than 5,000 wells. Of 55 volatile organic compounds (VOCs) analyzed in groundwater samples, solvents were among the most frequently detected. Mixtures of solvents in groundwater were common and may be the result of common usage of solvents or degradation of one solvent to another. Relative to other VOCs with Maximum Contaminant Levels (MCLs), PCE and TCE ranked high in terms of the frequencies of concentrations greater than or near MCLs. The probability of occurrence of solvents in groundwater was associated with dissolved oxygen content of groundwater, sources such as urban land use and population density, and hydraulic properties of the aquifer. The results reinforce the importance of understanding the redox conditions of aquifers and the hydraulic properties of the saturated and vadose zones in determining the intrinsic susceptibility of groundwater to contamination by solvents. The results also reinforce the importance of controlling sources of solvents to groundwater. ?? 2007 American Chemical Society.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Environmental Science and Technology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1021/es061553y","issn":"0013936X","usgsCitation":"Moran, M., Zogorski, J., and Squillace, P.J., 2007, Chlorinated solvents in groundwater of the United States: Environmental Science & Technology, v. 41, no. 1, p. 74-81, https://doi.org/10.1021/es061553y.","startPage":"74","endPage":"81","numberOfPages":"8","costCenters":[],"links":[{"id":213279,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1021/es061553y"},{"id":240889,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"41","issue":"1","noUsgsAuthors":false,"publicationDate":"2006-12-01","publicationStatus":"PW","scienceBaseUri":"5059f5cae4b0c8380cd4c40a","contributors":{"authors":[{"text":"Moran, M.J.","contributorId":7862,"corporation":false,"usgs":true,"family":"Moran","given":"M.J.","email":"","affiliations":[],"preferred":false,"id":439642,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Zogorski, J.S.","contributorId":108201,"corporation":false,"usgs":true,"family":"Zogorski","given":"J.S.","email":"","affiliations":[],"preferred":false,"id":439644,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Squillace, P. J.","contributorId":8878,"corporation":false,"usgs":true,"family":"Squillace","given":"P.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":439643,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70029767,"text":"70029767 - 2007 - Pyroclastic activity at home plate in Gusev crater, Mars","interactions":[],"lastModifiedDate":"2012-03-12T17:21:07","indexId":"70029767","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Pyroclastic activity at home plate in Gusev crater, Mars","docAbstract":"Home Plate is a layered plateau in Gusev crater on Mars. It is composed of clastic rocks of moderately altered alkali basalt composition, enriched in some highly volatile elements. A coarse-grained lower unit lies under a finer-grained upper unit. Textural observations indicate that the lower strata were emplaced in an explosive event, and geochemical considerations favor an explosive volcanic origin over an impact origin. The lower unit likely represents accumulation of pyroclastic materials, whereas the upper unit may represent eolian reworking of the same pyroclastic materials.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Science","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1126/science.1139045","issn":"00368075","usgsCitation":"Squyres, S.W., Aharonson, O., Clark, B.C., Cohen, B.A., Crumpler, L., de Souza, P., Farrand, W.H., Gellert, R., Grant, J., Grotzinger, J., Haldemann, A.F., Johnson, J.R., Klingelhofer, G., Lewis, K., Li, R., McCoy, T., McEwen, A.S., McSween, H., Ming, D.W., Moore, J.N., Morris, R., Parker, T.J., Rice, J.W., Ruff, S., Schmidt, M., Schroder, C., Soderblom, L., and Yen, A., 2007, Pyroclastic activity at home plate in Gusev crater, Mars: Science, v. 316, no. 5825, p. 738-742, https://doi.org/10.1126/science.1139045.","startPage":"738","endPage":"742","numberOfPages":"5","costCenters":[],"links":[{"id":477085,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://resolver.caltech.edu/CaltechAUTHORS:20130211-132009215","text":"External Repository"},{"id":212771,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1126/science.1139045"},{"id":240309,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"316","issue":"5825","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a9059e4b0c8380cd7fca3","contributors":{"authors":[{"text":"Squyres, S. W.","contributorId":31836,"corporation":false,"usgs":true,"family":"Squyres","given":"S.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":424198,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Aharonson, O.","contributorId":105030,"corporation":false,"usgs":false,"family":"Aharonson","given":"O.","affiliations":[],"preferred":false,"id":424219,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Clark, B. C.","contributorId":39918,"corporation":false,"usgs":true,"family":"Clark","given":"B.","middleInitial":"C.","affiliations":[],"preferred":false,"id":424202,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cohen, B. A.","contributorId":34239,"corporation":false,"usgs":true,"family":"Cohen","given":"B.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":424200,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Crumpler, L.","contributorId":59545,"corporation":false,"usgs":true,"family":"Crumpler","given":"L.","email":"","affiliations":[],"preferred":false,"id":424208,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"de Souza, P.A.","contributorId":57579,"corporation":false,"usgs":true,"family":"de Souza","given":"P.A.","affiliations":[],"preferred":false,"id":424207,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Farrand, W. H.","contributorId":64372,"corporation":false,"usgs":true,"family":"Farrand","given":"W.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":424210,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Gellert, Ralf","contributorId":35049,"corporation":false,"usgs":false,"family":"Gellert","given":"Ralf","email":"","affiliations":[{"id":12660,"text":"University of Guelph","active":true,"usgs":false}],"preferred":false,"id":424201,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Grant, J.","contributorId":53929,"corporation":false,"usgs":true,"family":"Grant","given":"J.","affiliations":[],"preferred":false,"id":424204,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Grotzinger, J.P.","contributorId":76053,"corporation":false,"usgs":true,"family":"Grotzinger","given":"J.P.","affiliations":[],"preferred":false,"id":424214,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Haldemann, A. F. C.","contributorId":33437,"corporation":false,"usgs":false,"family":"Haldemann","given":"A.","email":"","middleInitial":"F. C.","affiliations":[],"preferred":false,"id":424199,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Johnson, J. R.","contributorId":69278,"corporation":false,"usgs":true,"family":"Johnson","given":"J.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":424213,"contributorType":{"id":1,"text":"Authors"},"rank":12},{"text":"Klingelhofer, G.","contributorId":57195,"corporation":false,"usgs":true,"family":"Klingelhofer","given":"G.","email":"","affiliations":[],"preferred":false,"id":424206,"contributorType":{"id":1,"text":"Authors"},"rank":13},{"text":"Lewis, K.W.","contributorId":101784,"corporation":false,"usgs":true,"family":"Lewis","given":"K.W.","affiliations":[],"preferred":false,"id":424217,"contributorType":{"id":1,"text":"Authors"},"rank":14},{"text":"Li, R.","contributorId":68441,"corporation":false,"usgs":true,"family":"Li","given":"R.","affiliations":[],"preferred":false,"id":424212,"contributorType":{"id":1,"text":"Authors"},"rank":15},{"text":"McCoy, T.","contributorId":56776,"corporation":false,"usgs":true,"family":"McCoy","given":"T.","email":"","affiliations":[],"preferred":false,"id":424205,"contributorType":{"id":1,"text":"Authors"},"rank":16},{"text":"McEwen, A. S.","contributorId":11317,"corporation":false,"usgs":true,"family":"McEwen","given":"A.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":424194,"contributorType":{"id":1,"text":"Authors"},"rank":17},{"text":"McSween, H.Y.","contributorId":64370,"corporation":false,"usgs":true,"family":"McSween","given":"H.Y.","affiliations":[],"preferred":false,"id":424209,"contributorType":{"id":1,"text":"Authors"},"rank":18},{"text":"Ming, D. W.","contributorId":96811,"corporation":false,"usgs":true,"family":"Ming","given":"D.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":424216,"contributorType":{"id":1,"text":"Authors"},"rank":19},{"text":"Moore, Johnnie N.","contributorId":13668,"corporation":false,"usgs":true,"family":"Moore","given":"Johnnie","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":424196,"contributorType":{"id":1,"text":"Authors"},"rank":20},{"text":"Morris, R.V.","contributorId":6978,"corporation":false,"usgs":true,"family":"Morris","given":"R.V.","affiliations":[],"preferred":false,"id":424193,"contributorType":{"id":1,"text":"Authors"},"rank":21},{"text":"Parker, T. J.","contributorId":30776,"corporation":false,"usgs":false,"family":"Parker","given":"T.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":424197,"contributorType":{"id":1,"text":"Authors"},"rank":22},{"text":"Rice, J. W. Jr.","contributorId":53040,"corporation":false,"usgs":true,"family":"Rice","given":"J.","suffix":"Jr.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":424203,"contributorType":{"id":1,"text":"Authors"},"rank":23},{"text":"Ruff, S.","contributorId":104610,"corporation":false,"usgs":true,"family":"Ruff","given":"S.","affiliations":[],"preferred":false,"id":424218,"contributorType":{"id":1,"text":"Authors"},"rank":24},{"text":"Schmidt, M.","contributorId":11746,"corporation":false,"usgs":true,"family":"Schmidt","given":"M.","affiliations":[],"preferred":false,"id":424195,"contributorType":{"id":1,"text":"Authors"},"rank":25},{"text":"Schroder, C.","contributorId":67201,"corporation":false,"usgs":true,"family":"Schroder","given":"C.","affiliations":[],"preferred":false,"id":424211,"contributorType":{"id":1,"text":"Authors"},"rank":26},{"text":"Soderblom, L.A. 0000-0002-0917-853X","orcid":"https://orcid.org/0000-0002-0917-853X","contributorId":6139,"corporation":false,"usgs":true,"family":"Soderblom","given":"L.A.","affiliations":[],"preferred":false,"id":424192,"contributorType":{"id":1,"text":"Authors"},"rank":27},{"text":"Yen, A.","contributorId":76054,"corporation":false,"usgs":true,"family":"Yen","given":"A.","affiliations":[],"preferred":false,"id":424215,"contributorType":{"id":1,"text":"Authors"},"rank":28}]}}
,{"id":70030066,"text":"70030066 - 2007 - Influence of dissolved oxygen convection on well sampling","interactions":[],"lastModifiedDate":"2012-03-12T17:21:05","indexId":"70030066","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1864,"text":"Ground Water Monitoring and Remediation","active":true,"publicationSubtype":{"id":10}},"title":"Influence of dissolved oxygen convection on well sampling","docAbstract":"Convective transport of dissolved oxygen (D.O.) from shallow to deeper parts of wells was observed as the shallow water in wells in South Carolina became cooler than the deeper water in the wells due to seasonal changes. Wells having a relatively small depth to water were more susceptible to thermally induced convection than wells where the depth to water was greater because the shallower water levels were more influenced by air temperature. The potential for convective transport of D.O. to maintain oxygenated conditions in a well screened in an anaerobic aquifer was diminished as ground water exchange through the well screen increased and as oxygen demand increased. Transport of D.O. to the screened interval can adversely affect the ability of passive samplers to produce accurate concentrations of oxygen-sensitive solutes such as iron, other redox indicators, and microbiological data. A comparison of passive sampling to low-flow sampling in a well undergoing convection, however, showed general agreement of volatile organic compound concentrations. During low-flow sampling, the pumped water may be a mixture of convecting water from within the well casing and aquifer water moving inward through the screen. This mixing of water during low-flow sampling can substantially increase equilibration times, can cause false stabilization of indicator parameters, can give false indications of the redox state, and can provide microbiological data that are not representative of the aquifer conditions. Data from this investigation show that simple in-well devices can effectively mitigate convective transport of oxygen. The devices can range from inflatable packers to simple, inexpensive baffle systems. ?? 2007 National Ground Water Association.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Ground Water Monitoring and Remediation","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1111/j.1745-6592.2007.00156.x","issn":"10693629","usgsCitation":"Vroblesky, D., Casey, C., and Lowery, M., 2007, Influence of dissolved oxygen convection on well sampling: Ground Water Monitoring and Remediation, v. 27, no. 3, p. 49-58, https://doi.org/10.1111/j.1745-6592.2007.00156.x.","startPage":"49","endPage":"58","numberOfPages":"10","costCenters":[],"links":[{"id":212669,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1745-6592.2007.00156.x"},{"id":240192,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"27","issue":"3","noUsgsAuthors":false,"publicationDate":"2007-08-09","publicationStatus":"PW","scienceBaseUri":"505a3b2ae4b0c8380cd622aa","contributors":{"authors":[{"text":"Vroblesky, D.A.","contributorId":101691,"corporation":false,"usgs":true,"family":"Vroblesky","given":"D.A.","affiliations":[],"preferred":false,"id":425577,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Casey, C.C.","contributorId":10206,"corporation":false,"usgs":true,"family":"Casey","given":"C.C.","email":"","affiliations":[],"preferred":false,"id":425575,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lowery, M.A.","contributorId":56754,"corporation":false,"usgs":true,"family":"Lowery","given":"M.A.","email":"","affiliations":[],"preferred":false,"id":425576,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70033057,"text":"70033057 - 2007 - Sinter-vein correlations at Buckskin Mountain, National district, Humboldt County, Nevada","interactions":[],"lastModifiedDate":"2012-03-12T17:21:39","indexId":"70033057","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Sinter-vein correlations at Buckskin Mountain, National district, Humboldt County, Nevada","docAbstract":"At Buckskin Mountain (elev 2,650 m, 8,743 ft), Humboldt County, Nevada, a hydrothermal system, imposed on a middle Miocene volcanic sequence with contrasting permeabilities and tensile strengths, produced alteration assemblages controlled by elevation, from Hg-mineralized sinter to subjacent precious metal veins over a vertical distance exceeding 790 m. Sinter and epiclastic deposits, interpreted to be remnant paleosurface basinal strata enclosed by 16.6 to 16.1 Ma rhyolites, overlie older volcaniclastic basinal deposits and were part of a regional fluvial-lacustrine system developed among ca. 16 to 12 Ma basalt-rhyolite eruptive centers throughout the northern Great Basin. Because of contrasting erosional resistance among altered and unaltered rocks, Buckskin Mountain represents inverse topography with sinter and silicified epiclastic deposits at the summit. Sinter and veins, correlated by common elements, similar mineralogy, age constraints, textures, S isotope compositions, and fluid inclusion microthermometry, were deposited by sinter-vein fluid, the first of two sequential hydrothermal fluid regimes that evolved in response to magmatism, tectonism, hydrology, and topography. Thermal quenching of distally derived sinter-vein fluid in planar conduits caused deposition of banded quartz-silicate-selenide-sulfide veins ???270 to > 440 m below sinter at 16.1 Ma; vei??ns were initially enveloped by zoned selvages of proximal K-feldspar + K-mica + quartz + pyrite and distal illite + chlorite + calcite + pyrite. Mixing of sinter-vein fluid with local meteoric water in saturated basinal deposits caused deposition of silica, Hg-Se-S-Cl minerals, and precious metals in sinter and epiclastic deposits. Elevated ???Se/???S in sinter-vein fluid, and the relatively large stability fields of reduced aqueous selenide species in the temperature range of 250?? to <100??C, enabled (but was not the cause of) codeposition of selenide-sulfide minerals and common element associations in veins and sinter. Acid-sulfate fluid of the second fluid regime was derived from oxidation of H2S and other volatiles exsolved from sinter-vein fluid. Acid-sulfate fluid produced (1) a subhorizontal zone of partially leached basinal deposits and rhyolite from the paleosurface to a depth of ???60 m, and (2) laterally pervasive zones, ???100 to 200 m thick, of quartz + alunite ?? hematite and quartz + kaolinite + pyrite in volcaniclastic deposits immediately beneath partially leached rocks, but this fluid did not decompose selenide-sulfide-precious metal phases in sinter. Paragenetically late vein and wall-rock assemblages, including marcasite + pyrite, calcite, and kaolinite-replaced K minerals, record deeper transition of sinter-vein fluid into acid-sulfate fluid in vein conduits. This transition occurred as regional subsidence, manifested by the Goosey Lake depression immediately east of Buckskin Mountain, lowered the pieziometric surface at Buckskin Mountain, terminated sinter deposition, and caused boiling and/or degassing of sinter-vein fluid. The timing of subsidence is recorded by a decrease in alunite ages, from ca. 15.8 to 15.6 Ma, with depth below sinter. Lateral replacement of sinter and partially leached epiclastic deposits and rhyolite by opal-A marks the termination of the two hydrothermal regimes that lasted ???0.5 m.y. and followed rhyolitic volcanism of similar duration. Veins and sinter display textures that attest to plastic deformation, spalling, and gravitational settling, and indicate fluid-flow direction, velocity, and density stratification which, with conduit topology, may have influenced precious metal tenor in the veins. Components of sinter and veins were transported as colloids, formed in supersaturated sinter-vein fluid, that aggregated or coagulated as incompetent gelatinous layers in shallow pools and in underlying, near-vertical conduits in rhyolite and initially crystallized as opal and chalcedony. The low thermal conductivity of ho","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Economic Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.2113/gsecongeo.102.2.193","issn":"03610128","usgsCitation":"Vikre, P., 2007, Sinter-vein correlations at Buckskin Mountain, National district, Humboldt County, Nevada: Economic Geology, v. 102, no. 2, p. 193-224, https://doi.org/10.2113/gsecongeo.102.2.193.","startPage":"193","endPage":"224","numberOfPages":"32","costCenters":[],"links":[{"id":213242,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2113/gsecongeo.102.2.193"},{"id":240848,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"102","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b90eae4b08c986b3196db","contributors":{"authors":[{"text":"Vikre, P.G.","contributorId":76930,"corporation":false,"usgs":true,"family":"Vikre","given":"P.G.","affiliations":[],"preferred":false,"id":439189,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70029928,"text":"70029928 - 2007 - Anthropogenic contaminants as tracers in an urbanizing karst aquifer","interactions":[],"lastModifiedDate":"2012-03-12T17:21:35","indexId":"70029928","displayToPublicDate":"2007-01-01T00:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2233,"text":"Journal of Contaminant Hydrology","active":true,"publicationSubtype":{"id":10}},"title":"Anthropogenic contaminants as tracers in an urbanizing karst aquifer","docAbstract":"Karst aquifers are uniquely vulnerable to contamination. In the Barton Springs segment of the karstic Edwards aquifer (Texas, U.S.A.), urban contaminants such as pesticides and volatile organic compounds frequently are detected in spring base flow. To determine whether contaminant concentrations change in response to storms, and if they therefore might act as tracers of focused recharge, samples were collected from Barton Springs at closely spaced intervals following three storms. Two herbicides (atrazine and simazine), two insecticides (carbaryl and diazinon), and a solvent (tetrachloroethene) described breakthrough curves over a 1-week period following one or more storms. The breakthrough curves were decomposed into two to five log-normal subcurves, which were interpreted as representing pulses of contaminants moving through the aquifer. Each subcurve could be used in the same way as an artificial tracer to determine travel time to and recovery at the spring. The contaminants have several advantages over artificial tracers: they represent the actual compounds of interest, they are injected essentially simultaneously at several points, and they are injected under those conditions when transport is of the most interest, i.e., following storms. The response of storm discharge, specific conductance, and contaminant loading at the spring depended on initial aquifer flow conditions, which varied from very low (spring discharge of 0.48??m3/s) to high (spring discharge of 2.7??m3/s): concentrations and recovery were the highest when initial aquifer flow conditions were low. This behavior provides information about aquifer structure and the influence of aquifer flow condition on transport properties. ?? 2006 Elsevier B.V. All rights reserved.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Contaminant Hydrology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.1016/j.jconhyd.2006.08.010","issn":"01697722","usgsCitation":"Mahler, B., and Massei, N., 2007, Anthropogenic contaminants as tracers in an urbanizing karst aquifer: Journal of Contaminant Hydrology, v. 91, no. 1-2, p. 81-106, https://doi.org/10.1016/j.jconhyd.2006.08.010.","startPage":"81","endPage":"106","numberOfPages":"26","costCenters":[],"links":[{"id":213095,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/j.jconhyd.2006.08.010"},{"id":240684,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"91","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059ec58e4b0c8380cd491ed","contributors":{"authors":[{"text":"Mahler, B.","contributorId":32737,"corporation":false,"usgs":true,"family":"Mahler","given":"B.","email":"","affiliations":[],"preferred":false,"id":424941,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Massei, N.","contributorId":48347,"corporation":false,"usgs":true,"family":"Massei","given":"N.","email":"","affiliations":[],"preferred":false,"id":424942,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":79238,"text":"ds151 - 2006 - Geochemical data for mercury, methylmercury, and other constituents in sediments from Englebright Lake, California, 2002","interactions":[],"lastModifiedDate":"2020-03-21T11:55:07","indexId":"ds151","displayToPublicDate":"2012-01-01T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":310,"text":"Data Series","code":"DS","onlineIssn":"2327-638X","printIssn":"2327-0271","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"151","title":"Geochemical data for mercury, methylmercury, and other constituents in sediments from Englebright Lake, California, 2002","docAbstract":"This report presents geochemical data from two 2002 sampling campaigns conducted in Englebright Lake on the Yuba River in northern California. A deep coring campaign was done in May-June 2002 and a shallow sampling campaign was completed in October 2002. This work assessed the chemical composition of material deposited in the reservoir between 1940, the year Englebright Dam was completed, and 2002 as part of the Upper Yuba River Studies Program, an effort designed to evaluate the feasibility of introducing anadromous fish, including steelhead and spring-run Chinook salmon, upstream from Englebright Dam. Results of analyses of total mercury (HgT) in 444 subsamples, methylmercury (MeHg) in 243 subsamples, and other trace and major elements in 202 subsamples are presented. Data quality was evaluated on the basis of analyses of replicate pairs of subsamples, standard reference materials, blanks, and spike additions.Deep coring penetrated the full thickness of material deposited after 1940 at six locations in the reservoir; the cores reached a maximum depth of 32.8 meters below the reservoir floor. At the three deep coring sites closest to Englebright Dam, concentrations of HgT (dry basis) were consistently in the range of 100 to 500 ng/g (nanogram per gram), in sediment dominantly of silt size (median grain size of 0.004 to 0.063 mm [millimeter]). At the deep coring sites located farther upstream, the upper parts of the profile had lower concentrations of HgT, generally ranging from 2 to 100 ng/g, in sediment dominantly of sand size (median grain size from 0.063 to 2 mm). The lower part of the vertical profiles at three upstream coring sites had higher concentrations of HgT than the upper and middle parts of these profiles, and had finer median grain size. The highest median concentration of MeHg (1.1 ng/g) was in the top 2 cm (centimeter) of the shallow box cores. This vertical interval also had the highest value of the ratio of MeHg to HgT, 0.41 percent. Median concentrations of MeHg and median values of MeHg/HgT decreased systematically with depth from 0-4 to 4-8 to 8-12 cm in the shallow cores. However, similar systematic decreases were not observed at the meter scale in the deep cores of the MEM (MEthylMercury) series. The overall median of the ratio MeHg/HgT in the deep cores was 0.25 percent, not much less than the overall median value for the shallow cores (0.33 percent). Mercury-203 radiotracer divalent inorganic mercury (203Hg(II)) was used to determine microbial mercury-methylation potential rates for 11 samples collected from three reservoir locations and various depths in the sediment profile. For the five shallow mercury-methylation subsamples, ancillary geochemical parameters were assayed, including microbial sulfate reduction rates, sulfur speciation (sediment acid volatile sulfide, total reduced sulfur, and pore-water sulfate), iron speciation (sediment acid extractable iron(II), amorphous iron(III), crystalline iron(III) and pore-water iron(II)), pore-water chloride and dissolved organic carbon, and pH, oxidation-reduction potential (Eh) and whole-sediment organic content. The highest potential rates of microbial mercury methylation were measured in shallow (0 to 8 cm depth) sediments (5 to 30 nanograms of mercury per gram dry sediment per day), whereas potential rates for subsamples collected from depths greater than 500 cm were consistently below the detection limit of the radiotracer method (< 0.02 nanogram of mercury per gram dry sediment per day). Chemical analyses of trace and major elements in bed sediment are presented for 202 samples from deep cores from five locations in Englebright Lake. The mean values and standard deviations for selected trace elements were as follows (in micrograms per gram): antimony, 2.4  &plusmn; 1.6; arsenic, 69 &plusmn; 48; chromium, 134  &plusmn; 23; lead, 33  &plusmn; 25; and nickel, 87 &plusmn; 24. Concentrated samples of heavy-mineral grains, prepared using nine large-volume composite samples from","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ds151","collaboration":"Prepared in cooperation with the CALFED Ecosystem Restoration Program California Bay--Delta Authority and the California Resources Agency","usgsCitation":"Alpers, C.N., Hunerlach, M.P., Marvin-DePasquale, M.C., Antweiler, R.C., Lasorsa, B.K., De Wild, J.F., and Snyder, N., 2006, Geochemical data for mercury, methylmercury, and other constituents in sediments from Englebright Lake, California, 2002: U.S. Geological Survey Data Series 151, 107 p., https://doi.org/10.3133/ds151.","productDescription":"107 p.","numberOfPages":"107","onlineOnly":"Y","additionalOnlineFiles":"Y","temporalStart":"2002-01-01","temporalEnd":"2002-12-31","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true},{"id":589,"text":"Toxic Substances Hydrology Program","active":true,"usgs":true}],"links":[{"id":190683,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":274140,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/ds/2006/151/ds_151.pdf","text":"Report"},{"id":274139,"rank":3,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/ds/2006/151/"}],"country":"United States","state":"California","otherGeospatial":"Englebright Lake","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -121.27121,39.24487 ], [ -121.27121,39.29387 ], [ -121.21188,39.29387 ], [ -121.21188,39.24487 ], [ -121.27121,39.24487 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b23e4b07f02db6ae387","contributors":{"authors":[{"text":"Alpers, Charles N. 0000-0001-6945-7365 cnalpers@usgs.gov","orcid":"https://orcid.org/0000-0001-6945-7365","contributorId":411,"corporation":false,"usgs":true,"family":"Alpers","given":"Charles","email":"cnalpers@usgs.gov","middleInitial":"N.","affiliations":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"preferred":true,"id":512523,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hunerlach, Michael P.","contributorId":66668,"corporation":false,"usgs":true,"family":"Hunerlach","given":"Michael","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":512529,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Marvin-DePasquale, Mark C.","contributorId":38655,"corporation":false,"usgs":true,"family":"Marvin-DePasquale","given":"Mark","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":512526,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Antweiler, Ronald C. 0000-0001-5652-6034 antweil@usgs.gov","orcid":"https://orcid.org/0000-0001-5652-6034","contributorId":1481,"corporation":false,"usgs":true,"family":"Antweiler","given":"Ronald","email":"antweil@usgs.gov","middleInitial":"C.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":512524,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Lasorsa, Brenda K.","contributorId":45398,"corporation":false,"usgs":true,"family":"Lasorsa","given":"Brenda","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":512528,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"De Wild, John F.","contributorId":31800,"corporation":false,"usgs":true,"family":"De Wild","given":"John","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":512525,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Snyder, Noah P.","contributorId":43848,"corporation":false,"usgs":true,"family":"Snyder","given":"Noah P.","affiliations":[],"preferred":false,"id":512527,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":79756,"text":"sir20065150 - 2006 - Organic Compounds and Trace Elements in Fish Tissue and Bed Sediment in the Delaware River Basin, New Jersey, Pennsylvania, New York, and Delaware, 1998-2000","interactions":[],"lastModifiedDate":"2012-03-08T17:16:24","indexId":"sir20065150","displayToPublicDate":"2007-04-04T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-5150","title":"Organic Compounds and Trace Elements in Fish Tissue and Bed Sediment in the Delaware River Basin, New Jersey, Pennsylvania, New York, and Delaware, 1998-2000","docAbstract":"As part of the National Water-Quality Assessment (NAWQA) program activities in the Delaware River Basin (DELR), samples of fish tissue from 21 sites and samples of bed sediment from 35 sites were analyzed for a suite of organic compounds and trace elements. The sampling sites, within subbasins ranging in size from 11 to 600 square miles, were selected to represent 5 main land-use categories in the DELR -forest, low-agricultural, agricultural, urban, and mixed use. Samples of both fish tissue and bed sediment were also collected from 4 'large-river' sites that represented drainage areas ranging from 1,300 to 6,800 square miles, areas in which the land is used for a variety of purposes.\r\n\r\nOne or more of the organochlorine compounds-DDT and chlordane metabolites, polychlorinated biphenyls (total PCBs), and dieldrin- were detected frequently in samples collected over a wide geographic area. One or more of these compounds were detected in fish-tissue samples from 92 percent of the sites and in bed-sediment samples from 82 percent of the sites. Concentrations of total DDT, total chlordanes, total PCBs, and dieldrin in whole white suckers and in bed sediment were significantly related to urban/industrial basin characteristics, such as percentage of urban land use and population density.\r\n\r\nSemi-volatile organic compounds (SVOCs)-total polycyclic aromatic hydrocarbons (PAHs), total phthalates, and phenols- were detected frequently in bed-sediment samples. All three types of SVOCs were detected in samples from at least one site in each land-use category. The highest detection rates and concentrations typically were in samples from sites in the urban and mixed land-use categories, as well as from the large-river sites. Concentrations of total PAHs and total phthalates in bed-sediment samples were found to be statistically related to percentages of urban land use and to population density in the drainage areas represented by the sampling sites.\r\n\r\nThe samples of fish tissue and bed sediment collected throughout the DELR were analyzed for a large suite of trace elements, but results of the analyses for eight elements-arsenic, cadmium, chromium, copper, lead, nickel, mercury, and zinc- that are considered contaminants of concern are described in this report. One or more of the eight trace elements were detected in samples from every fish tissue and bed-sediment sampling site, and all of the trace elements were detected in samples from 97 percent of the bed-sediment sites.\r\n\r\nThe concentrations of organic compounds and trace elements in the DELR samples were compared to applicable guidelines for the protection of wildlife and other biological organisms. Concentrations of total DDT, total chlordanes, total PCBs, and dieldrin in fish-tissue samples from 14 sites exceeded one or more of the Wildlife Protective Guidelines established by the New York State Department of Environmental Conservation. Concentrations of one or more organic compounds in samples from 16 bed-sediment sites exceeded the Threshold Effects Concentrations (TEC) of the Canadian Sediment Quality Guidelines, and concentrations of one or more of the eight trace elements in samples from 38 bed-sediment sites exceeded the TEC. (The TEC is the concentration below which adverse biological effects in freshwater ecosystems are expected to be rare.) Concentrations of organic compounds in samples from some bed-sediment sites exceeded the Canadian Probable Effects Concentrations (PEC), and concentrations of trace elements in samples from 18 sites exceeded the PEC. (The PEC is the concentration above which adverse effects to biological organisms are expected to occur frequently).\r\n\r\nConcentrations of organic compounds and trace elements in samples from the DELR were compared to similar data from other NAWQA study units in the northeastern United States and also data from the Mobile River (Alabama) Basin and the Northern Rockies Intermontane Basin study units. Median concentrations of to","language":"ENGLISH","doi":"10.3133/sir20065150","usgsCitation":"Romanok, K., Fischer, J., Riva-Murray, K., Brightbill, R., and Bilger, M., 2006, Organic Compounds and Trace Elements in Fish Tissue and Bed Sediment in the Delaware River Basin, New Jersey, Pennsylvania, New York, and Delaware, 1998-2000: U.S. Geological Survey Scientific Investigations Report 2006-5150, xii, 70 p., https://doi.org/10.3133/sir20065150.","productDescription":"xii, 70 p.","costCenters":[{"id":470,"text":"New Jersey Water Science Center","active":true,"usgs":true}],"links":[{"id":195421,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":9431,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/sir/2006/5150/","linkFileType":{"id":5,"text":"html"}}],"geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -76.5,39 ], [ -76.5,42.5 ], [ -74,42.5 ], [ -74,39 ], [ -76.5,39 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4aeee4b07f02db691119","contributors":{"authors":[{"text":"Romanok, Kristin M. kromanok@usgs.gov","contributorId":3771,"corporation":false,"usgs":true,"family":"Romanok","given":"Kristin M.","email":"kromanok@usgs.gov","affiliations":[{"id":470,"text":"New Jersey Water Science Center","active":true,"usgs":true}],"preferred":false,"id":290765,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Fischer, Jeffrey M. 0000-0003-2996-9272 fischer@usgs.gov","orcid":"https://orcid.org/0000-0003-2996-9272","contributorId":573,"corporation":false,"usgs":true,"family":"Fischer","given":"Jeffrey M.","email":"fischer@usgs.gov","affiliations":[{"id":451,"text":"National Water Quality Assessment Program","active":true,"usgs":true}],"preferred":false,"id":290764,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Riva-Murray, Karen","contributorId":85650,"corporation":false,"usgs":true,"family":"Riva-Murray","given":"Karen","affiliations":[],"preferred":false,"id":290767,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Brightbill, Robin","contributorId":93150,"corporation":false,"usgs":true,"family":"Brightbill","given":"Robin","affiliations":[],"preferred":false,"id":290768,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Bilger, Michael","contributorId":33802,"corporation":false,"usgs":true,"family":"Bilger","given":"Michael","affiliations":[],"preferred":false,"id":290766,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":79719,"text":"sir20065299 - 2006 - Recent (2003-05) water quality of Barton Springs, Austin, Texas, with emphasis on factors affecting variability","interactions":[],"lastModifiedDate":"2016-08-23T14:42:25","indexId":"sir20065299","displayToPublicDate":"2007-03-24T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":334,"text":"Scientific Investigations Report","code":"SIR","onlineIssn":"2328-0328","printIssn":"2328-031X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2006-5299","title":"Recent (2003-05) water quality of Barton Springs, Austin, Texas, with emphasis on factors affecting variability","docAbstract":"<p>From 2003 to 2005, the U.S. Geological Survey, in cooperation with the Texas Commission on Environmental Quality, collected and analyzed water samples from the four springs (orifices) of Barton Springs in Austin, Texas (Upper, Main, Eliza, and Old Mill Springs), with the objective of characterizing water quality. Barton Springs is the major discharge point for the Barton Springs segment of the Edwards aquifer. A three-pronged sampling approach was used: physicochemical properties (including specific conductance and turbidity) were measured continuously; samples were collected from the four springs routinely every 2 weeks (during August-September 2003) to 3 weeks (during June 2004-June 2005) and analyzed for some or all major ions, nutrients, trace elements, soluble pesticides, and volatile organic compounds; and samples were collected from the four springs at more closely spaced intervals during the 2 weeks following two storms and analyzed for the same suite of constituents. Following the two storms, samples also were collected from five of the six major streams that provide recharge to Barton Springs. Spring discharge during both sample collection periods was above average (60 cubic feet per second or greater). Barton Springs was found to be affected by persistent low concentrations of atrazine (an herbicide), chloroform (a drinking-water disinfection by-product), and tetrachloroethene (a solvent). Increased recharge from the major recharging streams resulted in increased calcium, sulfate, atrazine, simazine, and tetrachloroethene concentrations and decreased concentrations of most other major ions, nitrate, and chloroform at one or more of the springs. These changes in concentration demonstrate the influence of water quality in recharging streams on water quality at the springs even during non-stormflow conditions. The geochemical compositions of the four springs indicate that Upper Spring is more contaminated and is influenced by a contributing flow path that is separate from those leading to other springs under all but stormflow conditions. Main, Eliza, and Old Mill Springs share at least one common flow path that contributes contaminants to the three springs. Old Mill Spring, however, is less affected by anthropogenic contaminants than the other springs and receives a greater component of water from a flow path whose geochemistry is influenced by water from the saline zone of the aquifer. At Main Spring, atrazine, simazine, chloroform, and tetrachloroethene concentrations increased following storms, describing breakthrough curves that peaked 2 days following rainfall; at Upper Spring, atrazine and simazine concentrations described breakthrough curves that peaked 1 day following rainfall. At both Main and Upper Springs, additional anthropogenic compounds were detected following storms. The geochemical response of the springs to recharge indicates that much of the transport occurs through conduits. When there is no flow in the recharging streams, ground water advects from the aquifer matrix into the conduits and is transported to the springs. When there is flow in the streams, recharge through the streambeds directly enters the conduit system and is transported to the springs. Following storms, surface runoff recharges through both interstream recharge features and streambeds, delivering runoff-related contaminants to Barton Springs.</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/sir20065299","collaboration":"Prepared in cooperation with the Texas Commission on Environmental Quality","usgsCitation":"Mahler, B., Garner, B.D., Musgrove, M., Guilfoyle, A.L., and Rao, M.V., 2006, Recent (2003-05) water quality of Barton Springs, Austin, Texas, with emphasis on factors affecting variability: U.S. Geological Survey Scientific Investigations Report 2006-5299, Report: x, 83 p.; 5 Appendices (Appendix 1: 13 p., Appendix 2: 271 p., Appendix 3: 7 p., Appendix 4: 20 p., Appendix 5: 22 p.);, https://doi.org/10.3133/sir20065299.","productDescription":"Report: x, 83 p.; 5 Appendices (Appendix 1: 13 p., Appendix 2: 271 p., Appendix 3: 7 p., Appendix 4: 20 p., Appendix 5: 22 p.);","onlineOnly":"Y","additionalOnlineFiles":"Y","temporalStart":"2003-01-01","temporalEnd":"2005-12-31","costCenters":[{"id":583,"text":"Texas Water Science Center","active":true,"usgs":true}],"links":[{"id":192667,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/sir20065299.gif"},{"id":9375,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/sir/2006/5299/","linkFileType":{"id":5,"text":"html"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a7ee4b07f02db648642","contributors":{"authors":[{"text":"Mahler, Barbara 0000-0002-9150-9552 bjmahler@usgs.gov","orcid":"https://orcid.org/0000-0002-9150-9552","contributorId":1249,"corporation":false,"usgs":true,"family":"Mahler","given":"Barbara","email":"bjmahler@usgs.gov","affiliations":[{"id":37277,"text":"WMA - Earth System Processes Division","active":true,"usgs":true},{"id":583,"text":"Texas Water Science Center","active":true,"usgs":true}],"preferred":true,"id":290648,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Garner, Bradley D. 0000-0002-6912-5093 bdgarner@usgs.gov","orcid":"https://orcid.org/0000-0002-6912-5093","contributorId":2133,"corporation":false,"usgs":true,"family":"Garner","given":"Bradley","email":"bdgarner@usgs.gov","middleInitial":"D.","affiliations":[{"id":5054,"text":"Office of Water Information","active":true,"usgs":true}],"preferred":true,"id":290649,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Musgrove, MaryLynn","contributorId":34878,"corporation":false,"usgs":true,"family":"Musgrove","given":"MaryLynn","affiliations":[],"preferred":false,"id":290651,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Guilfoyle, Amber L.","contributorId":13707,"corporation":false,"usgs":true,"family":"Guilfoyle","given":"Amber","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":290650,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Rao, Mohan V.","contributorId":92363,"corporation":false,"usgs":true,"family":"Rao","given":"Mohan","email":"","middleInitial":"V.","affiliations":[],"preferred":false,"id":290652,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":79661,"text":"sim2934 - 2006 - Geologic Map of the MTM-20272 and-25272 Quadrangles, Tyrrhena Terra Region of Mars","interactions":[],"lastModifiedDate":"2016-12-28T14:18:59","indexId":"sim2934","displayToPublicDate":"2007-02-28T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":333,"text":"Scientific Investigations Map","code":"SIM","onlineIssn":"2329-132X","printIssn":"2329-1311","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2934","title":"Geologic Map of the MTM-20272 and-25272 Quadrangles, Tyrrhena Terra Region of Mars","docAbstract":"Introduction\r\n\r\nMars Transverse Mercator (MTM) -20272 and -25272 quadrangles (lat 17.5?-27.5? S., long 270?-275? W.) cover part of the highlands of Tyrrhena Terra north of Hellas Planitia. The surface of the Tyrrhena Terra region records a complex history of impact cratering and modification by fluvial and eolian activity. The map area consists primarily of intercrater plains, impact crater material, and crater floor material. An extensive valley network, Vichada Valles, as well as several smaller networks, dissects the northern part of the map area. The abundance and widespread nature of fluvial features within the map area have significant implications for past Martian environmental conditions. The degraded terrains surrounding Hellas Planitia provide constraints on the role and timing of volatile-driven activity in the evolution of the highlands. The geologic history of this area may have been influenced not only by the presence of Hellas Planitia but also by other buried impact basins.","language":"ENGLISH","doi":"10.3133/sim2934","isbn":"1411310624","collaboration":"Prepared for the National Aeronautics and Space Administration","usgsCitation":"Mest, S.C., and Crown, D., 2006, Geologic Map of the MTM-20272 and-25272 Quadrangles, Tyrrhena Terra Region of Mars (Version 1.0): U.S. Geological Survey Scientific Investigations Map 2934, map (41x37 in); pamphlet 15 p., https://doi.org/10.3133/sim2934.","productDescription":"map (41x37 in); pamphlet 15 p.","costCenters":[{"id":131,"text":"Astrogeology Science Center","active":true,"usgs":true}],"links":[{"id":194575,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":9403,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/sim/2006/2934/","linkFileType":{"id":5,"text":"html"}}],"scale":"1004000","projection":"Mars Transverse Mercator","edition":"Version 1.0","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b1ae4b07f02db6a84c8","contributors":{"authors":[{"text":"Mest, Scott C.","contributorId":96375,"corporation":false,"usgs":true,"family":"Mest","given":"Scott","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":290518,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Crown, David A.","contributorId":102582,"corporation":false,"usgs":true,"family":"Crown","given":"David A.","affiliations":[],"preferred":false,"id":290519,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":79533,"text":"sim2938 - 2006 - Volatile organic compounds in samples from domestic and public wells, 1985-2002","interactions":[],"lastModifiedDate":"2023-04-18T20:04:05.340987","indexId":"sim2938","displayToPublicDate":"2007-01-04T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":333,"text":"Scientific Investigations Map","code":"SIM","onlineIssn":"2329-132X","printIssn":"2329-1311","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2938","title":"Volatile organic compounds in samples from domestic and public wells, 1985-2002","docAbstract":"The U.S. Geological Survey's (USGS) National Water-Quality Assessment (NAWQA) Program recently completed a national study of volatile organic compounds (VOCs) in the Nation's ground water (Zogorski and others, 2006). Part of this assessment emphasizes the occurrence of 55 VOCs in samples from 2,401 domestic wells and 1,096 public wells during 1985-2002. Samples were collected prior to any treatment or blending of water.\r\n\r\nDomestic wells are privately owned, self-supplied sources used for drinking water and household use (Moran and others, 2002). Public wells are privately or publicly owned and supply water to public water systems (PWSs). Samples from public wells in this assessment characterize the quality of water captured by wells that supply drinking water to PWSs. These systems supply drinking water to at least 15 service connections or regularly serve at least 25 individuals daily at least 60 days a year (U.S. Environmental Protection Agency, 2005).\r\n\r\nFor a screening-level assessment, VOC concentrations were compared to human-health benchmarks. Concentrations greater than the U.S. Environmental Protection Agency's (USEPA) Maximum Contamination Levels (MCLs) (U.S. Environmental Protection Agency, 2004) or the USGS's Health-Based Screening Levels (HBSLs) (Zogorski and others, 2006) were considered of potential human-health concern. The findings from the well samples provide an important perspective on the quality of the Nation's ground water used for drinking-water supplies. More information about this national assessment of VOCs is available (http://water.usgs.gov/nawqa/vocs/national_assessment).","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/sim2938","usgsCitation":"Rowe, B.L., Zogorski, J.S., and Valder, J., 2006, Volatile organic compounds in samples from domestic and public wells, 1985-2002: U.S. Geological Survey Scientific Investigations Map 2938, 1 Plate: 36.00 x 36.00 inches, https://doi.org/10.3133/sim2938.","productDescription":"1 Plate: 36.00 x 36.00 inches","temporalStart":"1985-01-01","temporalEnd":"2002-12-31","costCenters":[{"id":562,"text":"South Dakota Water Science Center","active":true,"usgs":true},{"id":34685,"text":"Dakota Water Science Center","active":true,"usgs":true}],"links":[{"id":194918,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":110697,"rank":3,"type":{"id":36,"text":"NGMDB Index 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,{"id":79532,"text":"sim2931 - 2006 - The occurrence of volatile organic compounds in aquifers of the United States","interactions":[],"lastModifiedDate":"2017-10-14T14:21:57","indexId":"sim2931","displayToPublicDate":"2007-01-04T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":333,"text":"Scientific Investigations Map","code":"SIM","onlineIssn":"2329-132X","printIssn":"2329-1311","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2931","title":"The occurrence of volatile organic compounds in aquifers of the United States","docAbstract":"The U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program recently completed a national assessment of volatile organic compounds (VOCs) in ground water (Zogorski and others, 2006). As part of this assessment, samples of ambient ground water collected from 3,498 wells during 1985-2002 were selected for characterizing the occurrence of 55 VOCs in 98 aquifer studies. The 55 VOCs were assigned to the following groups on the basis of their primary usage (or origin): (1) fumigants, (2) gasoline hydrocarbons, (3) gasoline oxygenates, (4) organic synthesis compounds, (5) refrigerants, (6) solvents, and (7) trihalo-methanes (chlorination by-products).\r\n\r\nThe samples were collected throughout the conterminous United States as well as Alaska and Hawaii. The sampled wells had a variety of uses including domestic supply (61 percent), public supply (15 percent), monitoring (10 percent), other (13 percent), and unknown (1 percent).\r\n\r\nNAWQA aquifer studies are large-scale resource assessments of ground water that provide a general characterization of water-quality conditions in locally and regionally important aquifers or portions thereof. In general, the aquifers (or portions thereof) selected for study were some of the most intensively used aquifers for drinking water in greaterHawaiiOahuAlaskathe Nation. The 98 aquifer studies collectively provide an important national perspective on the current (1985-2002) extent of VOC contamination and regional patterns of VOC occurrence in ground water. More information about this national assessment of VOCs is available at a supporting Web site (http://water.usgs.gov/nawqa/vocs/national_assessment).\r\n\r\n","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/sim2931","usgsCitation":"Lapham, W.W., Carter, J.M., Zogorski, J.S., and Valder, J., 2006, The occurrence of volatile organic compounds in aquifers of the United States: U.S. Geological Survey Scientific Investigations Map 2931, 1 p., https://doi.org/10.3133/sim2931.","productDescription":"1 p.","costCenters":[{"id":562,"text":"South Dakota Water Science Center","active":true,"usgs":true},{"id":34685,"text":"Dakota Water Science Center","active":true,"usgs":true}],"links":[{"id":110695,"rank":700,"type":{"id":15,"text":"Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_78845.htm","linkFileType":{"id":5,"text":"html"},"description":"78845"},{"id":193312,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":9092,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/sim/2006/2931/","linkFileType":{"id":5,"text":"html"}}],"country":"United States","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ac7e4b07f02db67af62","contributors":{"authors":[{"text":"Lapham, Wayne W.","contributorId":74734,"corporation":false,"usgs":true,"family":"Lapham","given":"Wayne","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":290163,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Carter, Janet M. 0000-0002-6376-3473 jmcarter@usgs.gov","orcid":"https://orcid.org/0000-0002-6376-3473","contributorId":339,"corporation":false,"usgs":true,"family":"Carter","given":"Janet","email":"jmcarter@usgs.gov","middleInitial":"M.","affiliations":[{"id":562,"text":"South Dakota Water Science Center","active":true,"usgs":true},{"id":34685,"text":"Dakota Water Science Center","active":true,"usgs":true}],"preferred":false,"id":290161,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Zogorski, John S. jszogors@usgs.gov","contributorId":189,"corporation":false,"usgs":true,"family":"Zogorski","given":"John","email":"jszogors@usgs.gov","middleInitial":"S.","affiliations":[],"preferred":true,"id":290160,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Valder, Joshua F. 0000-0003-3733-8868 jvalder@usgs.gov","orcid":"https://orcid.org/0000-0003-3733-8868","contributorId":1431,"corporation":false,"usgs":true,"family":"Valder","given":"Joshua F.","email":"jvalder@usgs.gov","affiliations":[{"id":562,"text":"South Dakota Water Science Center","active":true,"usgs":true}],"preferred":false,"id":290162,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":79531,"text":"sim2937 - 2006 - Occurrence of volatile organic compounds in selected urban streams in the United States, 1995-2003","interactions":[],"lastModifiedDate":"2017-10-14T14:23:00","indexId":"sim2937","displayToPublicDate":"2007-01-04T00:00:00","publicationYear":"2006","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":333,"text":"Scientific Investigations Map","code":"SIM","onlineIssn":"2329-132X","printIssn":"2329-1311","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2937","title":"Occurrence of volatile organic compounds in selected urban streams in the United States, 1995-2003","docAbstract":"The U.S. Geological Survey's National Water-Quality Assessment (NAWQA) Program sampled 37 urban streams throughout the United States for volatile organic compounds (VOCs) from 1995 to 2003. These urban streams were selected to (1) characterize stream water quality from areas draining predominantly residential and commercial land uses and (2) determine which natural and human factors affect stream quality. Initial interpretation of the VOC data set is focused on determining which VOCs commonly are found, the range of concentrations, and the temporal distribution (Lopes and Price, 1997).\r\n\r\nThe 37 urban streams sampled had drainage areas that ranged from 23 to 13,000 square kilometers with a median of 71 square kilometers. The urban streams are located in eight major surface-water regions within the conterminous United States, Alaska, and Hawaii. The urban streams were sampled for VOCs monthly for about 1 year with some storm samples collected at selected sites (Lopes and Price, 1997). A total of 869 samples (410 samples in the warmer months and 459 samples in the cooler months) were collected and were analyzed for 85 individual VOCs. Data are available at http://infotrek.er.usgs.gov/pls/nawqa/nawqa.home\r\n\r\n","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/sim2937","usgsCitation":"Bender, D.A., Price, C.V., and Valder, J., 2006, Occurrence of volatile organic compounds in selected urban streams in the United States, 1995-2003: U.S. Geological Survey Scientific Investigations Map 2937, 1 p. (36 x 36 inches), https://doi.org/10.3133/sim2937.","productDescription":"1 p. (36 x 36 inches)","temporalStart":"1995-01-01","temporalEnd":"2003-12-31","costCenters":[{"id":562,"text":"South Dakota Water Science Center","active":true,"usgs":true},{"id":34685,"text":"Dakota Water Science Center","active":true,"usgs":true}],"links":[{"id":193257,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":9093,"rank":100,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/sim/2006/2937/","linkFileType":{"id":5,"text":"html"}},{"id":110696,"rank":700,"type":{"id":15,"text":"Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_78846.htm","linkFileType":{"id":5,"text":"html"},"description":"78846"}],"country":"United States","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4af6e4b07f02db692a7a","contributors":{"authors":[{"text":"Bender, David A. 0000-0002-1269-0948 dabender@usgs.gov","orcid":"https://orcid.org/0000-0002-1269-0948","contributorId":985,"corporation":false,"usgs":true,"family":"Bender","given":"David","email":"dabender@usgs.gov","middleInitial":"A.","affiliations":[{"id":562,"text":"South Dakota Water Science Center","active":true,"usgs":true}],"preferred":true,"id":290158,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Price, Curtis V. 0000-0002-4315-3539 cprice@usgs.gov","orcid":"https://orcid.org/0000-0002-4315-3539","contributorId":983,"corporation":false,"usgs":true,"family":"Price","given":"Curtis","email":"cprice@usgs.gov","middleInitial":"V.","affiliations":[{"id":562,"text":"South Dakota Water Science Center","active":true,"usgs":true}],"preferred":true,"id":290157,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Valder, Joshua F. 0000-0003-3733-8868 jvalder@usgs.gov","orcid":"https://orcid.org/0000-0003-3733-8868","contributorId":1431,"corporation":false,"usgs":true,"family":"Valder","given":"Joshua F.","email":"jvalder@usgs.gov","affiliations":[{"id":562,"text":"South Dakota Water Science Center","active":true,"usgs":true}],"preferred":false,"id":290159,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
]}