{"pageNumber":"1452","pageRowStart":"36275","pageSize":"25","recordCount":41014,"records":[{"id":70013667,"text":"70013667 - 1988 - Stratigraphy and magnetic polarity of the high terrace remnants in the upper Ohio and Monongahela Rivers in West Virginia, Pennsylvania, and Ohio","interactions":[],"lastModifiedDate":"2013-01-26T07:06:47","indexId":"70013667","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3218,"text":"Quaternary Research","active":true,"publicationSubtype":{"id":10}},"title":"Stratigraphy and magnetic polarity of the high terrace remnants in the upper Ohio and Monongahela Rivers in West Virginia, Pennsylvania, and Ohio","docAbstract":"A synthesis of previous work and new data on the stratigraphy of high terraces of the Ohio and Monongahela Rivers upstream from Parkersburg, West Virginia, indicates a correspondence between terrace histories in the ancient Teays and Pittsburgh drainage basins. Four terraces are identified in each. Sediments of the lower three alluvial and slackwater terraces, correlated with Illinoian, early Wisconsin, and late Wisconsin glacial deposits, have been traced along the modern Ohio River through the former divide between the Teays and Pittsburgh basins. Sediments in the fourth terrace, the highest well-defined terrace in each basin, were deposited in two ice-dammed lakes, separated by a divide near New Martinsville, West Virginia. Some deposits of the highest slackwater terrace in both the Teays and Pittsburgh basins have reversed remanent magnetic polarity. This, and the stratigraphic succession in the two basins, suggests that both were ponded during the same glaciation. Reversed polarity in these terrace sediments restricts the age of the first ice-damming event for which stratigraphic evidence is well-preserved to a pre-Illinoian, early Pleistocene glaciation prior to 788,000 yr ago. In contrast, slackwater sediments in the Monongahela River valley, upstream from an outwash gravel dam at the Allegheny-Monongahela confluence, have normal remanent magnetic polarity, corroborating correlation with an Illinoian ponding event. ?? 1988.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","publisherLocation":"Amsterdam, Netherlands","doi":"10.1016/0033-5894(88)90031-2","issn":"00335894","usgsCitation":"Jacobson, R., Elston, D.P., and Heaton, J.W., 1988, Stratigraphy and magnetic polarity of the high terrace remnants in the upper Ohio and Monongahela Rivers in West Virginia, Pennsylvania, and Ohio: Quaternary Research, v. 29, no. 3, p. 216-232, https://doi.org/10.1016/0033-5894(88)90031-2.","startPage":"216","endPage":"232","numberOfPages":"17","costCenters":[],"links":[{"id":219993,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":266522,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0033-5894(88)90031-2"}],"volume":"29","issue":"3","noUsgsAuthors":false,"publicationDate":"2017-01-20","publicationStatus":"PW","scienceBaseUri":"505b99a8e4b08c986b31c52f","contributors":{"authors":[{"text":"Jacobson, R. B. 0000-0002-8368-2064","orcid":"https://orcid.org/0000-0002-8368-2064","contributorId":92614,"corporation":false,"usgs":true,"family":"Jacobson","given":"R. B.","affiliations":[{"id":192,"text":"Columbia Environmental Research Center","active":true,"usgs":true}],"preferred":true,"id":366593,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Elston, D. P.","contributorId":96334,"corporation":false,"usgs":true,"family":"Elston","given":"D.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":366594,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Heaton, John W.","contributorId":42705,"corporation":false,"usgs":true,"family":"Heaton","given":"John","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":366592,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70014709,"text":"70014709 - 1988 - Anomalous shear wave attenuation in the shallow crust beneath the Coso volcanic region, California","interactions":[],"lastModifiedDate":"2024-06-05T14:38:46.831799","indexId":"70014709","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Anomalous shear wave attenuation in the shallow crust beneath the Coso volcanic region, California","docAbstract":"<p><span>We use seismograms of local earthquakes to image relative shear wave attenuation structure in the shallow crust beneath the region containing the Coso volcanic-geothermal area of eastern California.&nbsp;</span><i>SV</i><span>&nbsp;and&nbsp;</span><i>P</i><span>&nbsp;wave amplitudes were measured from vertical component seismograms of earthquakes that occurred in the Cososouthem Sierra Nevada region from July 1983 to August 1985. Seismograms of 16 small earthquakes show&nbsp;</span><i>SV</i><span>&nbsp;amplitudes which are greatly diminished at some azimuths and takeoff angles, indicating strong lateral variations in&nbsp;</span><i>S</i><span>&nbsp;wave attenuation in the area. Three-dimensional images of the relative&nbsp;</span><i>S</i><span>&nbsp;wave attenuation structure are obtained from forward modeling and a back projection inversion of the amplitude data. The results indicate regions within a 20 by 30 by 10 km volume of the shallow crust (one shallower than 5 km) that severely attenuate&nbsp;</span><i>SV</i><span>&nbsp;waves passing through them. These anomalies lie beneath the Indian Wells Valley, 30 km south of the Coso volcanic field, and are coincident with the epicentral locations of recent earthquake swarms. No anomalous attenuation is seen beneath the Coso volcanic field above about 5 km depth. Geologic relations and the coincidence of anomalously slow&nbsp;</span><i>P</i><span>&nbsp;wave velocities suggest that the attenuation anomalies may be related to magmatism along the eastern Sierra front.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB093iB04p03321","issn":"01480227","usgsCitation":"Sanders, C., Ho-Liu, P., Rinn, D., and Hiroo, K., 1988, Anomalous shear wave attenuation in the shallow crust beneath the Coso volcanic region, California: Journal of Geophysical Research Solid Earth, v. 93, no. B4, p. 3321-3338, https://doi.org/10.1029/JB093iB04p03321.","productDescription":"18 p.","startPage":"3321","endPage":"3338","numberOfPages":"18","costCenters":[],"links":[{"id":480029,"rank":2,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://doi.org/10.1029/jb093ib04p03321","text":"External Repository"},{"id":225654,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"93","issue":"B4","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"5059ec4be4b0c8380cd4919b","contributors":{"authors":[{"text":"Sanders, C.","contributorId":91640,"corporation":false,"usgs":true,"family":"Sanders","given":"C.","email":"","affiliations":[],"preferred":false,"id":369059,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ho-Liu, P.","contributorId":36689,"corporation":false,"usgs":true,"family":"Ho-Liu","given":"P.","email":"","affiliations":[],"preferred":false,"id":369057,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rinn, D.","contributorId":92436,"corporation":false,"usgs":true,"family":"Rinn","given":"D.","email":"","affiliations":[],"preferred":false,"id":369060,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hiroo, Kanamori","contributorId":60784,"corporation":false,"usgs":true,"family":"Hiroo","given":"Kanamori","affiliations":[],"preferred":false,"id":369058,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70014295,"text":"70014295 - 1988 - Regional assessment of pumpage in southeastern Virginia","interactions":[],"lastModifiedDate":"2012-03-12T17:19:36","indexId":"70014295","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Regional assessment of pumpage in southeastern Virginia","docAbstract":"A U.S. Geological Survey investigation was conducted, in cooperation with the Virginia Water Control Board, to analyze the hydrogeology and groundwater flow system in the Coastal Plain physiographic province of southeastern Virginia, and to assess the continued reliability of groundwater as a freshwater resource. To provide a more detailed analysis of water-level decline and groundwater flow, a three-dimensional, digital, groundwater flow model, which incorporates hydrogeologic characteristics of the aquifers and confining units, was developed to simulate prepumping and pumping conditions. The results of this modeling effort provide a broad regional perspective on the magnitude and direction of groundwater flow in the confined system in the Coastal Plain physiographic province of southeastern Virginia.","conferenceTitle":"Critical Water Issues and Computer Applications: Proceedings of the 15th Annual Water Resources Conference","conferenceDate":"1 June 1988 through 3 June 1988","conferenceLocation":"Norfolk, VA, USA","language":"English","publisher":"Publ by ASCE","publisherLocation":"New York, NY, United States","isbn":"0872626601","usgsCitation":"Hamilton, P.A., 1988, Regional assessment of pumpage in southeastern Virginia, Critical Water Issues and Computer Applications: Proceedings of the 15th Annual Water Resources Conference, Norfolk, VA, USA, 1 June 1988 through 3 June 1988, p. 168-170.","startPage":"168","endPage":"170","numberOfPages":"3","costCenters":[],"links":[{"id":226077,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"50e4a4aae4b0e8fec6cdbbf2","contributors":{"authors":[{"text":"Hamilton, Pixie A. pahamilt@usgs.gov","contributorId":1068,"corporation":false,"usgs":true,"family":"Hamilton","given":"Pixie","email":"pahamilt@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":true,"id":368060,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70014733,"text":"70014733 - 1988 - The mechanics of ground deformation precursory to dome-building extrusions at Mount St. Helens 1981-1982","interactions":[],"lastModifiedDate":"2024-05-30T16:48:17.685689","indexId":"70014733","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"The mechanics of ground deformation precursory to dome-building extrusions at Mount St. Helens 1981-1982","docAbstract":"<p><span>Detailed monitoring at Mount St. Helens since 1980 has enabled prediction of the intermittent eruptive activity (mostly dome growth) with unprecedented success. During 1981 and 1982, accelerating deformation of the crater floor around the vent (including radial cracks, thrust faults, and ground tilt) was the earliest indicator of impending activity. Numerical experiments using the finite element method to model the mechanics of the crater floor show that all deformation features can be explained by a uniform shear-stress boundary condition along the conduit wall. The magnitude of the shear stress required to match observed displacements (1–7 MPa) is inversely proportional to the conduit diameter (estimated to be 25–100 m). The most probable source of this shear stress is the flow of viscous magma up the conduit and into the lava dome. We propose a model in which the accelerating deformation, beginning as much as 4 weeks before extrusions, is caused by the increasing velocity of ascending magma in the conduit. This model is examined by using deformation data of the dome before four extrusions in 1981 and 1982 to estimate the volumetric flow rate through the conduit. This flow rate and an estimate of the effective viscosity of the magma enable calculation of an ascent velocity and an applied shear stress that, again, depend on the conduit diameter. The results of these calculations are consistent with the finite element experiments and show that the proposed model is feasible. In light of this model, events observed just before or near the time extrusions began, such as reversals of ground tilt direction from outward to inward and the sudden decrease in the number of shallow earthquakes, may indicate an abrupt decrease of shear stress in the conduit. This could be explained by a decrease in either the ascent velocity, or the effective viscosity of the magma ascending through the shallow conduit, or both, near the time of extrusion. Precursory deformation like that measured at Mount St. Helens should be observable at similar volcanoes elsewhere because it is caused by the fundamental process of magma ascent.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB093iB05p04351","issn":"01480227","usgsCitation":"Chadwick, W., Archuleta, R., and Swanson, D.A., 1988, The mechanics of ground deformation precursory to dome-building extrusions at Mount St. Helens 1981-1982: Journal of Geophysical Research Solid Earth, v. 93, no. B5, p. 4351-4366, https://doi.org/10.1029/JB093iB05p04351.","productDescription":"16 p.","startPage":"4351","endPage":"4366","numberOfPages":"16","costCenters":[],"links":[{"id":226104,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"93","issue":"B5","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505badc4e4b08c986b323dd6","contributors":{"authors":[{"text":"Chadwick, W.W. Jr.","contributorId":35876,"corporation":false,"usgs":true,"family":"Chadwick","given":"W.W.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":369156,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Archuleta, R.J.","contributorId":79245,"corporation":false,"usgs":true,"family":"Archuleta","given":"R.J.","affiliations":[],"preferred":false,"id":369157,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Swanson, D. A.","contributorId":34102,"corporation":false,"usgs":true,"family":"Swanson","given":"D.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":369155,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70014297,"text":"70014297 - 1988 - Depositional models for two Tertiary coal-bearing sequences in the Powder River Basin, Wyoming, USA","interactions":[],"lastModifiedDate":"2018-02-01T12:51:49","indexId":"70014297","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2545,"text":"Journal of the Geological Society","active":true,"publicationSubtype":{"id":10}},"title":"Depositional models for two Tertiary coal-bearing sequences in the Powder River Basin, Wyoming, USA","docAbstract":"<p id=\"p-1\">Depositional controls on peat-forming environments which produce thick (&gt;10m) coal beds can be inferred from relationships between coal bed geometry, maceral composition and associated lithologies. Study of these relationships within sedimentary sequences associated with the Wyodak-Anderson (Palaeocene) and the Felix (Eocene) sub-bituminous coal beds in the Powder River Basin, Wyoming, USA suggests two modes of fluvially controlled peat accumulation. The Wyodak-Anderson peat is interpreted to have formed in restricted parts of the floodplain that were separated by deposits of contemporaneous, anastomosed channels. The channels and associated sediments maintained their position through time because they were confined by thick deposits of raised Wyodak-Anderson peat. In contrast, the Felix coal bed is interpreted to have formed as a raised but widespread peat on an abandoned platform of meander-belt sands.</p><p id=\"p-2\">The purpose of this paper is to compare and contrast two different fluvial depositional settings that produced anomalously thick (&gt;10m) coal deposits in the intermontane Powder River Basin of Wyoming, USA. These models may be useful as predictive tools for coal exploration and production.</p>","language":"English","publisher":"Geological Society of London","doi":"10.1144/gsjgs.145.4.0613","usgsCitation":"Warwick, P.D., and Stanton, R.W., 1988, Depositional models for two Tertiary coal-bearing sequences in the Powder River Basin, Wyoming, USA: Journal of the Geological Society, v. 145, no. 4, p. 613-620, https://doi.org/10.1144/gsjgs.145.4.0613.","productDescription":"8 p.","startPage":"613","endPage":"620","costCenters":[],"links":[{"id":226079,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Wyoming","otherGeospatial":"Powder River Basin","volume":"145","issue":"4","noUsgsAuthors":false,"publicationDate":"2022-06-06","publicationStatus":"PW","scienceBaseUri":"5059fec7e4b0c8380cd4ef0a","contributors":{"authors":[{"text":"Warwick, Peter D. 0000-0002-3152-7783 pwarwick@usgs.gov","orcid":"https://orcid.org/0000-0002-3152-7783","contributorId":762,"corporation":false,"usgs":true,"family":"Warwick","given":"Peter","email":"pwarwick@usgs.gov","middleInitial":"D.","affiliations":[{"id":241,"text":"Eastern Energy Resources Science Center","active":true,"usgs":true}],"preferred":false,"id":368065,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stanton, Ronald W.","contributorId":37386,"corporation":false,"usgs":true,"family":"Stanton","given":"Ronald","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":368064,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70014298,"text":"70014298 - 1988 - Three-dimensional gravity modeling of the geologic structure of Long Valley caldera","interactions":[],"lastModifiedDate":"2024-06-05T15:48:18.183909","indexId":"70014298","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Three-dimensional gravity modeling of the geologic structure of Long Valley caldera","docAbstract":"<p><span>A 48-mGal gravity low coincides with Long Valley caldera and is mainly attributed to low-density caldera fill. Gravity measurements by Unocal Geothermal have been integrated with U.S. Geological Survey data, vastly improving gravity station coverage throughout the caldera. A strong regional gravity trend is mainly attributed to isostasy. A “best fitting” (based on regional control of basement densities) Airy-Heiskanen isostatic model was used for the regional correction. A three-dimensional, multiple-unit gravity modeling program with iterative capabilities was developed to model the residual gravity. The density structure of Long Valley caldera and vicinity was modeled with 22 discrete density units, most of which were based on geologic units. Information from drill hole lithologies, surface geology, and structural geology interpretations constrain the model. Some important points revealed by the three-dimensional gravity modeling are that (1) the volume of ejected magma associated with the Bishop Tuff eruption is greater than previously thought, (2) the caldera structure is strongly influenced by precaldera topography and the extensions of major, active faults, (3) the main west ring fracture is coincident with the Inyo Domes-Mono Craters fracture system, (4) a relatively low-density region probably underlies the caldera, and (5) a silicic magma chamber may underlie Devils Postpile.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB093iB11p13237","issn":"01480227","usgsCitation":"Carle, S.F., 1988, Three-dimensional gravity modeling of the geologic structure of Long Valley caldera: Journal of Geophysical Research Solid Earth, v. 93, no. B11, p. 13237-13250, https://doi.org/10.1029/JB093iB11p13237.","productDescription":"14 p.","startPage":"13237","endPage":"13250","costCenters":[],"links":[{"id":226080,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"93","issue":"B11","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505bb32ce4b08c986b325c1c","contributors":{"authors":[{"text":"Carle, S. F.","contributorId":72808,"corporation":false,"usgs":true,"family":"Carle","given":"S.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":368066,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70014333,"text":"70014333 - 1988 - An Angus/Argo study of the neovolcanic zone along the East Pacific rise from the Clipperton fracture zone to 12°N","interactions":[],"lastModifiedDate":"2015-06-02T11:47:38","indexId":"70014333","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1742,"text":"Geo-Marine Letters","active":true,"publicationSubtype":{"id":10}},"title":"An Angus/Argo study of the neovolcanic zone along the East Pacific rise from the Clipperton fracture zone to 12°N","docAbstract":"<p><span>Still photographs and video images collected along the Neovolcanic Zone of the East Pacific Rise from 10&deg;15&prime;N to 11&deg;53&prime;N show that recent volcanic sheet flows, possibly less than 100 years old, are superimposed on an older sediment-laden pillow terrane. This recent activity is restricted to a narrow zone that crosses two topographic highs at 10&deg;55&prime;N and 11&deg;26&prime;N and diminishes along-axis away from these highs. The association of recent sheet flows with older flows and collapse structures on the overlapping spreading centers at 11&deg;45&prime;N supports the evolutionary model for the occurrence and evolution of overlapping spreading centers by MacDonald and others (1986, 1988).</span></p>","language":"English","publisher":"Springer","doi":"10.1007/BF02326089","issn":"02760460","usgsCitation":"Uchupi, E., Schwab, W.C., Ballard, R.D., Cheminee, J., Francheteau, J., Hekinian, R., Blackman, D., and Sigurdsson, H., 1988, An Angus/Argo study of the neovolcanic zone along the East Pacific rise from the Clipperton fracture zone to 12°N: Geo-Marine Letters, v. 8, no. 3, p. 131-138, https://doi.org/10.1007/BF02326089.","productDescription":"8 p.","startPage":"131","endPage":"138","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":487232,"rank":10000,"type":{"id":41,"text":"Open Access External Repository Page"},"url":"https://digitalcommons.uri.edu/gsofacpubs/2436","text":"External Repository"},{"id":225633,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":205641,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF02326089"}],"volume":"8","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e9d0e4b0c8380cd48495","contributors":{"authors":[{"text":"Uchupi, E.","contributorId":10074,"corporation":false,"usgs":true,"family":"Uchupi","given":"E.","affiliations":[],"preferred":false,"id":368140,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Schwab, W. C.","contributorId":78740,"corporation":false,"usgs":true,"family":"Schwab","given":"W.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":368146,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ballard, Richard D.","contributorId":40729,"corporation":false,"usgs":true,"family":"Ballard","given":"Richard","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":368143,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cheminee, J.L.","contributorId":79633,"corporation":false,"usgs":true,"family":"Cheminee","given":"J.L.","affiliations":[],"preferred":false,"id":368147,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Francheteau, Jean","contributorId":34262,"corporation":false,"usgs":false,"family":"Francheteau","given":"Jean","email":"","affiliations":[],"preferred":false,"id":368141,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Hekinian, R.","contributorId":44273,"corporation":false,"usgs":true,"family":"Hekinian","given":"R.","email":"","affiliations":[],"preferred":false,"id":368144,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Blackman, D.K.","contributorId":59962,"corporation":false,"usgs":true,"family":"Blackman","given":"D.K.","email":"","affiliations":[],"preferred":false,"id":368145,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Sigurdsson, Haraldur","contributorId":35079,"corporation":false,"usgs":true,"family":"Sigurdsson","given":"Haraldur","email":"","affiliations":[],"preferred":false,"id":368142,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}}
,{"id":70014334,"text":"70014334 - 1988 - Precursory seismic quiescence: A preliminary assessment of the hypothesis","interactions":[],"lastModifiedDate":"2012-03-12T17:19:30","indexId":"70014334","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3209,"text":"Pure and Applied Geophysics PAGEOPH","active":true,"publicationSubtype":{"id":10}},"title":"Precursory seismic quiescence: A preliminary assessment of the hypothesis","docAbstract":"Numerous cases of precursory seismic quiescence have been reported in recent years. Some investigators have interpreted these observations as evidence that seismic quiescence is a somewhat reliable precursor to moderate or large earthquakes. However, because failures of the pattern to predict earthquakes may not, in general, be reported, and because numerous earthquakes are not preceded by quiescence, the validity and reliability of the quiescence precursor have not been established. We have analyzed the seismicity rate prior to, and in the source region of, 37 shallow earthquakes (M 5.3-7.0) in central California and Japan for patterns of rate fluctuation, especially precursory quiescence. Nonuniformity in rate for these pre-mainshock sequences is relatively high, and numerous intervals with significant (p<0.10) extrema in rate are observed in some of the sequences. In other sequences, however, the rate remains within normal limits up to the time of the mainshock. Overall, in terms of an observational basis for intermediate-term earthquake prediction, no evidence is found in the cases studied for a systematic, widespread or reliable pattern of quiescence prior to the mainshocks. In earthquake sequences comprising full seismic cycles for 5 sets of (M 3.7-5.1) repeat earthquakes on the San Andreas fault near Bear Valley, California, the seismicity rates are found to be uniform. A composite of the estimated rate fluctuations for the sequences, normalized to the length of the seismic cycle, reveals a weak pattern of a low rate in the first third of the cycle, and a high rate in the last few months. While these observations are qualitative, they may represent weak expressions of physical processes occurring in the source region over the seismic cycle. Re-examination of seismicity rate fluctuations in volumes along the creeping section of the San Andreas fault specified by Wyss and Burford (1985) qualitatively confirms the existence of low-rate intervals in volumes 361, 386, 382, 372 and 401. However, only the quiescence in volume 386 is found by the present study to be statistically significant. ?? 1988 Birkha??user Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Pure and Applied Geophysics PAGEOPH","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Birkha??user-Verlag","doi":"10.1007/BF00879004","issn":"00334553","usgsCitation":"Reasenberg, P., and Matthews, M., 1988, Precursory seismic quiescence: A preliminary assessment of the hypothesis: Pure and Applied Geophysics PAGEOPH, v. 126, no. 2-4, p. 373-406, https://doi.org/10.1007/BF00879004.","startPage":"373","endPage":"406","numberOfPages":"34","costCenters":[],"links":[{"id":205648,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00879004"},{"id":225699,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"126","issue":"2-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a814ce4b0c8380cd7b463","contributors":{"authors":[{"text":"Reasenberg, P.A.","contributorId":19959,"corporation":false,"usgs":true,"family":"Reasenberg","given":"P.A.","email":"","affiliations":[],"preferred":false,"id":368148,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Matthews, M.V.","contributorId":70920,"corporation":false,"usgs":true,"family":"Matthews","given":"M.V.","email":"","affiliations":[],"preferred":false,"id":368149,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70014397,"text":"70014397 - 1988 - The hydrothermal system at Newberry Volcano, Oregon","interactions":[],"lastModifiedDate":"2024-06-05T15:31:30.70872","indexId":"70014397","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"The hydrothermal system at Newberry Volcano, Oregon","docAbstract":"<p><span>Results of recent geological and geophysical studies at Newberry Volcano have been incorporated into conceptual and numerical models of a magma-based hydrothermal system. Numerical simulations begin with emplacement of a small magma body, the presumed source of silicic eruptions at Newberry that began about 10,000 B.P., into a thermal regime representing 100,000 years of cooling of a large underlying intrusion. Simulated flow patterns and thermal histories for three sets of hypothetical permeability values are compatible with data from four geothermal drill holes on the volcano. Meteoric recharge cools the caldera-fill deposits, but thermal water moving up a central conduit representing a permeable volcanic vent produces temperatures close to those observed in drill holes within the caldera. Meteoric recharge from the caldera moves down the flanks and creates a near-isothermal zone that extends several hundred meters below the water table, producing temperature profiles similar to those observed in drill holes on the flanks. The temperatures observed in drill holes on the flanks are not influenced by the postulated Holocene magma body. The elevated temperature gradients measured in the lower portions of these holes may be related to the cumulative effect of older intrusions. The models also indicate that meteoric recharge to the deep hydrothermal system probably originates within or near the caldera. Relatively low fluid velocities at depth suggest that at least a significant fraction of the thermal fluid may be very old.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB093iB09p10149","issn":"01480227","usgsCitation":"Sammel, E., Ingebritsen, S.E., and Mariner, R.H., 1988, The hydrothermal system at Newberry Volcano, Oregon: Journal of Geophysical Research Solid Earth, v. 93, no. B9, p. 10149-10162, https://doi.org/10.1029/JB093iB09p10149.","productDescription":"14 p.","startPage":"10149","endPage":"10162","numberOfPages":"14","costCenters":[],"links":[{"id":225831,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"93","issue":"B9","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505baccee4b08c986b32375c","contributors":{"authors":[{"text":"Sammel, E.A.","contributorId":59480,"corporation":false,"usgs":true,"family":"Sammel","given":"E.A.","affiliations":[],"preferred":false,"id":368309,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ingebritsen, S. E.","contributorId":8078,"corporation":false,"usgs":true,"family":"Ingebritsen","given":"S.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":368308,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mariner, Robert H.","contributorId":81075,"corporation":false,"usgs":true,"family":"Mariner","given":"Robert","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":368310,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70014418,"text":"70014418 - 1988 - Effects of three-dimensional velocity structure on the seismicity of the 1984 Morgan Hill, California, aftershock sequence","interactions":[],"lastModifiedDate":"2023-10-28T00:03:13.198919","indexId":"70014418","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Effects of three-dimensional velocity structure on the seismicity of the 1984 Morgan Hill, California, aftershock sequence","docAbstract":"<p>A three-dimensional velocity model for the area surrounding the 24 April 1984 Morgan Hill earthquake has been developed by simultaneously inverting local earthquake and refraction arrival-time data. This velocity model corresponds well to the surface geology of the region, predominantly showing a low-velocity region associated with the sedimentary sequence to the southwest of the Madrone Springs fault. This low-velocity sequence extends to a depth of approximately 5 km. Previously constructed geologic cross-sections for this region had suggested that these sediments extended to a depth of less than 2 km. Relocation of 2,179 hypocenters with the three-dimensional velocity model did not show great differences when compared to locations done with a one-dimensional velocity model with station corrections. In both cases, the Calaveras fault is steep but has a noticeable dip to the northeast and the seismicity does not intersect the surface along the trace of the Calaveras fault in the southern half of the rupture zone. The greatest differences between the two sets of locations was that the locations using the three-dimensional velocity model were deeper, and fewer earthquakes were located within the low-velocity region. The focal mechanisms were also determined for 946 earthquakes using both the one-dimensional and three-dimensional earth models. Both earth models yield similar focal mechanisms for these earthquakes.</p>","language":"English","publisher":"Seismological Society of America","doi":"10.1785/BSSA0780031199","usgsCitation":"Michael, A., 1988, Effects of three-dimensional velocity structure on the seismicity of the 1984 Morgan Hill, California, aftershock sequence: Bulletin of the Seismological Society of America, v. 78, no. 3, p. 1199-1221, https://doi.org/10.1785/BSSA0780031199.","productDescription":"23 p.","startPage":"1199","endPage":"1221","numberOfPages":"23","costCenters":[],"links":[{"id":422213,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.geoscienceworld.org/ssa/bssa/article/78/3/1199/102327/Effects-of-three-dimensional-velocity-structure-on"},{"id":226221,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -121.76463433600294,\n              37.421031586189955\n            ],\n            [\n              -121.76463433600294,\n              36.94800385988415\n            ],\n            [\n              -121.0560161719405,\n              36.94800385988415\n            ],\n            [\n              -121.0560161719405,\n              37.421031586189955\n            ],\n            [\n              -121.76463433600294,\n              37.421031586189955\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"78","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a080ce4b0c8380cd5194f","contributors":{"authors":[{"text":"Michael, A.J. 0000-0002-2403-5019","orcid":"https://orcid.org/0000-0002-2403-5019","contributorId":52192,"corporation":false,"usgs":true,"family":"Michael","given":"A.J.","affiliations":[],"preferred":false,"id":368358,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70013749,"text":"70013749 - 1988 - Leaching characteristics of a high-calcium fly ash as a function of pH: A potential source of selenium toxicity","interactions":[],"lastModifiedDate":"2023-03-15T12:19:45.169849","indexId":"70013749","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":835,"text":"Applied Geochemistry","active":true,"publicationSubtype":{"id":10}},"title":"Leaching characteristics of a high-calcium fly ash as a function of pH: A potential source of selenium toxicity","docAbstract":"<div id=\"abstracts\" class=\"Abstracts u-font-gulliver text-s\"><div id=\"ab1\" class=\"abstract author\" lang=\"en\"><div id=\"aep-abstract-sec-id7\"><p>Using a modified extraction procedure, the effect of pH on the leaching of selected elements from Ca-rich (Type C) power plant fly ash was studied. Continuous additions of acetic acid were used to maintain pH values of fly ash slurries at 4.0, 6.0 and 8.0 for 24 h and an additional set was leached at its natural pH (average 11.8) value. Analyses for Se, As, Ca, Cd, Cr, Fe, Na and Pb showed that the highest concentrations occur in the leachate at pH 4.0 and decline with increasing pH. Concentrations of Cr and Fe increased slightly between neutral and high pH. Arsenic, Cd, Cr, Pb and Se concentrations exceeded the Environmental Protection Agency's toxicity criteria at pH 4.0. Selenium was above its toxicity level at pH values near 7 but the other elements were below their respective toxicity levels near neutral pH. Because recent studies show adverse effects of Se on aquatic life at far lower concentrations than the current Environmental Protection Agency's standard, high-Ca, power plant fly ashes represent a potentially hazardous pollutant to surface and subsurface waters.</p></div></div></div>","language":"English","publisher":"Elsevier","doi":"10.1016/0883-2927(88)90092-3","issn":"08832927","usgsCitation":"Grisafe, D., Angino, E., and Smith, S.M., 1988, Leaching characteristics of a high-calcium fly ash as a function of pH: A potential source of selenium toxicity: Applied Geochemistry, v. 3, no. 6, p. 601-608, https://doi.org/10.1016/0883-2927(88)90092-3.","productDescription":"8 p.","startPage":"601","endPage":"608","numberOfPages":"8","costCenters":[],"links":[{"id":220557,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"3","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a459de4b0c8380cd67440","contributors":{"authors":[{"text":"Grisafe, D.A.","contributorId":9768,"corporation":false,"usgs":true,"family":"Grisafe","given":"D.A.","affiliations":[],"preferred":false,"id":366787,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Angino, E.E.","contributorId":8972,"corporation":false,"usgs":true,"family":"Angino","given":"E.E.","email":"","affiliations":[],"preferred":false,"id":366786,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Smith, S. M.","contributorId":27859,"corporation":false,"usgs":true,"family":"Smith","given":"S.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":366788,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70014455,"text":"70014455 - 1988 - Vapor-dominated zones within hydrothermal systems: Evolution and natural state","interactions":[],"lastModifiedDate":"2024-06-05T14:53:15.43716","indexId":"70014455","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"Vapor-dominated zones within hydrothermal systems: Evolution and natural state","docAbstract":"<p><span>Three conceptual models illustrate the range of hydrothermal systems in which vapor-dominated conditions are found. The first model (model I) represents a system with an extensive near-vaporstatic vapor-dominated zone and limited liquid throughflow and is analogous to systems such as The Geysers, California. Such systems can evolve within low-permeability barriers without changes in boundary conditions or rock properties, given an adequate supply of heat. Their scarcity in nature may be due to the need for a long-lived, potent heat source and for a low-permeability aureole that remains intact for significant lengths of time. Models II and III represent systems with significant liquid throughflow and include steam-heated discharge features at higher elevations and high-chloride springs at lower elevations, connected to and fed by a single circulation system at depth. In model II, as in model I, the vapor-dominated zone has a near-vaporstatic vertical pressure gradient and is generally underpressured with respect to local hydrostatic pressure. The vapor-dominated zone in model III is quite different, in that phase separation takes place at pressures close to local hydrostatic and the overall pressure gradient is near hydrostatic. A relatively large number of high-temperature systems in regions of moderate to great topographic relief are similar to either model II or model III; however, in most cases there are insufficient data to establish a single preferred model.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB093iB11p13635","issn":"01480227","usgsCitation":"Ingebritsen, S.E., and Sorey, M., 1988, Vapor-dominated zones within hydrothermal systems: Evolution and natural state: Journal of Geophysical Research Solid Earth, v. 93, no. B11, p. 13635-13655, https://doi.org/10.1029/JB093iB11p13635.","productDescription":"21 p.","startPage":"13635","endPage":"13655","costCenters":[],"links":[{"id":225776,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"93","issue":"B11","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505bc120e4b08c986b32a461","contributors":{"authors":[{"text":"Ingebritsen, S. E.","contributorId":8078,"corporation":false,"usgs":true,"family":"Ingebritsen","given":"S.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":368433,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sorey, M.L.","contributorId":73185,"corporation":false,"usgs":true,"family":"Sorey","given":"M.L.","affiliations":[],"preferred":false,"id":368434,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70014458,"text":"70014458 - 1988 - The growth of geological structures by repeated earthquakes: 2, Field examples of continental dip-slip faults","interactions":[],"lastModifiedDate":"2024-06-05T14:50:02.422105","indexId":"70014458","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":6453,"text":"Journal of Geophysical Research Solid Earth","active":true,"publicationSubtype":{"id":10}},"title":"The growth of geological structures by repeated earthquakes: 2, Field examples of continental dip-slip faults","docAbstract":"<p><span>A strong test of our understanding of the earthquake cycle is the ability to reproduce extant fault-bounded geological structures, such as basins and ranges, which are built by repeated cycles of deformation. Along strike-slip faults, the coseismic and interseismic deformation can be nearly equal in magnitude and opposite in sign, resulting in little permanent deformation except for the fault offset. For dip-slip faults, portions of the crust are lifted and dropped, and so buoyancy forces are exerted. The seismic and interseismic deformations do not balance, and structures grow and become subject to erosion and deposition. We consider three examples for which the structure and fault geometry are well known: the White Wolf reverse fault in California, site of the 1952 Kern County M=7.3 earthquake, the Lost River normal fault in Idaho, site of the 1983 Borah Peak M=7.0 earthquake, and the Cricket Mountain normal fault in Utah, site of Quaternary slip events. Basin stratigraphy and seismic reflection records are used to profile the structure, and coseismic deformation measured by leveling surveys is used to estimate the fault geometry. To reproduce these structures, we add the deformation associated with the earthquake cycle (the coseismic slip and postseismic relaxation) to the flexure caused by the observed sediment load, treating the crust as a thin elastic plate overlying a fluid substrate. The cumulative deformation is principally dependent on the elastic plate thickness, modestly sensitive to the sediment-substrate density difference, and insensitive to the fluid viscosity for the 4- to 8-Ma structures. We deduce a longterm flexural rigidity of 2–15 × 10</span><sup>19</sup><span>&nbsp;Nm; this is equivalent to an elastic plate thickness of 2–4 km for a Young's modulus of 2.5 × 10</span><sup>10</sup><span>&nbsp;Nm</span><sup>−2</sup><span>. This value is found where independent estimates of the elastic thickness from the coherence between surface topography and gravity yield values of about 4 km, but where coseismic fault slip extends to a depth of 10–15 km. Thus much of the seismogenic crust must weaken substantially during the life of active faults, causing the fault-bounded basins to narrow over time.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/JB093iB11p13319","issn":"01480227","usgsCitation":"Stein, R., King, G., and Rundle, J.B., 1988, The growth of geological structures by repeated earthquakes: 2, Field examples of continental dip-slip faults: Journal of Geophysical Research Solid Earth, v. 93, no. B11, p. 13319-13331, https://doi.org/10.1029/JB093iB11p13319.","productDescription":"13 p.","startPage":"13319","endPage":"13331","costCenters":[],"links":[{"id":225835,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"93","issue":"B11","noUsgsAuthors":false,"publicationDate":"2012-09-20","publicationStatus":"PW","scienceBaseUri":"505baca9e4b08c986b32364a","contributors":{"authors":[{"text":"Stein, R.S.","contributorId":8875,"corporation":false,"usgs":true,"family":"Stein","given":"R.S.","email":"","affiliations":[],"preferred":false,"id":368441,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"King, G.C.P.","contributorId":18510,"corporation":false,"usgs":true,"family":"King","given":"G.C.P.","email":"","affiliations":[],"preferred":false,"id":368443,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rundle, J. B.","contributorId":17766,"corporation":false,"usgs":false,"family":"Rundle","given":"J.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":368442,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70014718,"text":"70014718 - 1988 - Pb, Sr, and Nd isotopic compositions of a suite of Late Archean, igneous rocks, eastern Beartooth Mountains: Implications for crust-mantle evolution","interactions":[],"lastModifiedDate":"2023-12-09T15:46:54.517196","indexId":"70014718","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1427,"text":"Earth and Planetary Science Letters","active":true,"publicationSubtype":{"id":10}},"title":"Pb, Sr, and Nd isotopic compositions of a suite of Late Archean, igneous rocks, eastern Beartooth Mountains: Implications for crust-mantle evolution","docAbstract":"<div id=\"abstracts\" class=\"Abstracts u-font-serif text-s\"><div id=\"ab1\" class=\"abstract author\" lang=\"en\"><div id=\"aep-abstract-sec-id3\"><p>A series of compositionally diverse, Late Archean rocks (2.74–2.79 Ga old) from the eastern Beartooth Mountains, Montana and Wyoming, U.S.A., have the same initial Pb, Sr, and Nd isotopic ratios. Lead and Sr initial ratios are higher and Nd initial ratios lower than would be expected for rocks derived from model mantle sources and strongly indicate the involvement of an older crustal reservoir in the genesis of these rocks. Crustal contamination during emplacement can be ruled out for a variety of reasons. Instead a model involving subduction of continental detritus and contamination of the overlying mantle as is often proposed for modern subduction environments is preferred. This contaminated mantle would have all the isotopic characteristics of mantle enriched by internal mantle metasomatism but would require no long-term growth or changes in parent to daughter element ratios. This contaminated mantle would make a good source for some of the Cenozoic mafic volcanics of the Columbia River, Snake River Plain, and Yellowstone volcanic fields that are proposed to come from ancient, enriched lithospheric mantle. The isotopic characteristics of the 2.70 Ga old Stillwater Complex are a perfect match for the proposed contaminated mantle which provides an alternative to crustal contamination during emplacement. The Pb isotopic characteristics of the Late Archean rocks of the eastern Beartooth Mountains are similar to those of other Late Archean rocks of the Wyoming Province and suggest that Early Archean, upper crustal rocks were common in this terrane. The isotopic signatures of Late Archean rocks in the Wyoming Province are distinctive from those of other Archean cratons in North America which are dominated by a MORB-like, Archean mantle source (Superior Province) and/or a long-term depleted crustal source (Greenland).</p></div></div></div>","language":"English","publisher":"Elsevier","doi":"10.1016/0012-821X(88)90064-7","issn":"0012821X","usgsCitation":"Wooden, J.L., and Mueller, P., 1988, Pb, Sr, and Nd isotopic compositions of a suite of Late Archean, igneous rocks, eastern Beartooth Mountains: Implications for crust-mantle evolution: Earth and Planetary Science Letters, v. 87, no. 1-2, p. 59-72, https://doi.org/10.1016/0012-821X(88)90064-7.","productDescription":"14 p.","startPage":"59","endPage":"72","numberOfPages":"14","costCenters":[],"links":[{"id":225792,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"87","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a75fde4b0c8380cd77e6e","contributors":{"authors":[{"text":"Wooden, J. L.","contributorId":58678,"corporation":false,"usgs":true,"family":"Wooden","given":"J.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":369122,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mueller, P.A.","contributorId":86117,"corporation":false,"usgs":true,"family":"Mueller","given":"P.A.","email":"","affiliations":[],"preferred":false,"id":369123,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70013724,"text":"70013724 - 1988 - Distribution of selenium in soils of agricultural fields, western San Joaquin Valley, California","interactions":[{"subject":{"id":13696,"text":"ofr87467 - 1987 - Distribution of selenium in soils of agricultural fields, western San Joaquin Valley, California","indexId":"ofr87467","publicationYear":"1987","noYear":false,"title":"Distribution of selenium in soils of agricultural fields, western San Joaquin Valley, California"},"predicate":"SUPERSEDED_BY","object":{"id":70013724,"text":"70013724 - 1988 - Distribution of selenium in soils of agricultural fields, western San Joaquin Valley, California","indexId":"70013724","publicationYear":"1988","noYear":false,"title":"Distribution of selenium in soils of agricultural fields, western San Joaquin Valley, California"},"id":1}],"lastModifiedDate":"2018-09-18T09:44:10","indexId":"70013724","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3420,"text":"Soil Science Society of America Journal","active":true,"publicationSubtype":{"id":10}},"title":"Distribution of selenium in soils of agricultural fields, western San Joaquin Valley, California","docAbstract":"Soils from three agricultural fields in the Panoche Creek alluvial fan area in the western San Joaquin Valley, California, were analyzed for soluble, adsorbed, and total concentrations of selenium (Se) to assess the distribution and forms of Se in relation to the leaching of Se from soils. This assessment is needed to evaluate the importance of soil Se in affecting ground water concentrations. Soil samples were collected from three fields with drainage systems of different ages (6, 15, 1.5 yr) and different Se concentrations in drain water (58, 430, 3700 µg L<sup>−1</sup>, respectively). Concentrations of soluble Se and salinity were highest in soils from the field drained for 1.5 yr and lowest in the field drained for 6 yr. Of the total concentration of soil Se from all three fields, the proportion of adsorbed and soluble Se ranged from 1 to 11% and <1 to 63%, respectively. Most of the soluble Se was present as selenate and most of the adsorbed Se was found to be selenite. Consistent with a model of evaporative concentration of Se and salinity in soils and shallow ground water in this area, most of the variance in soluble Se is explained by salinity (r<sup>2</sup> > 0.68) in saturation extracts of soils sampled from below the water table. In contrast, most soluble salts and Se apparently have been leached from the unsaturated soils in the fields drained for 6 and 15 yr. For the leached soils, dissolution and precipitation of evaporite minerals containing Se may no longer control concentrations of soluble Se.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Soil Science Society of America Journal","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Soil Science Society of America","doi":"10.2136/sssaj1988.03615995005200050011x","issn":"03615995","usgsCitation":"Fujii, R., Deverel, S.J., and Hatfield, D.B., 1988, Distribution of selenium in soils of agricultural fields, western San Joaquin Valley, California: Soil Science Society of America Journal, v. 52, no. 5, p. 1274-1283, https://doi.org/10.2136/sssaj1988.03615995005200050011x.","productDescription":"10 p.","startPage":"1274","endPage":"1283","costCenters":[{"id":154,"text":"California Water Science Center","active":true,"usgs":true}],"links":[{"id":220053,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":276963,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.2136/sssaj1988.03615995005200050011x"}],"country":"United States","state":"California","otherGeospatial":"San Joaquin Valley","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -121.8438,38.1663 ], [ -121.8438,35.0589 ], [ -118.6734,35.0589 ], [ -118.6734,38.1663 ], [ -121.8438,38.1663 ] ] ] } } ] }","volume":"52","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a0300e4b0c8380cd502c6","contributors":{"authors":[{"text":"Fujii, Roger rfujii@usgs.gov","contributorId":553,"corporation":false,"usgs":true,"family":"Fujii","given":"Roger","email":"rfujii@usgs.gov","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":366725,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Deverel, S. J.","contributorId":65478,"corporation":false,"usgs":true,"family":"Deverel","given":"S.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":366727,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hatfield, D. B.","contributorId":33329,"corporation":false,"usgs":true,"family":"Hatfield","given":"D.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":366726,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70014710,"text":"70014710 - 1988 - Using laser micro mass spectrometry with the LAMMA-1000 instrument for monitoring relative elemental concentrations in vitrinite","interactions":[],"lastModifiedDate":"2012-03-12T17:19:33","indexId":"70014710","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2742,"text":"Mikrochimica Acta","active":true,"publicationSubtype":{"id":10}},"title":"Using laser micro mass spectrometry with the LAMMA-1000 instrument for monitoring relative elemental concentrations in vitrinite","docAbstract":"The variation in relative elemental concentrations among a series of coal macerals belonging to the vitrinite maceral group was determined using laser micro mass spectrometry (LAMMS). Variations in Ba, Cr, Ga, Sr, Ti, and V concentrations among the coals were determined using the LAMM A-1000 instrument. LAMMS analysis is not limited to these elements; their selection illustrates the application of the technique. Ba, Cr, Ga, Sr, Ti, and V have minimal site-to-site variance in the vitrinite macerals of the studied coals as measured by LAMMS. The LAMMS data were compared with bulk elemental data obtained by instrumental neutron activation analysis (INAA) and D. C. arc optical emission spectroscopy (DCAS) in order to determine the reliability of the LAMMS data. The complex nature of the ionization phenomena in LAMMS and the lack of standards characterized on a microscale makes obtaining quantitative elemental data within the ionization microvolume difficult; however, we demonstrate that the relative variation of an element among vitrinites from different coal beds in the eastern United States can be observed using LAMMS in a \"bulk\" mode by accumulating signal intensities over several microareas of each vitrinite. Our studies indicate gross changes (greater than a factor of 2 to 5 depending on the element) can be monitored when the elemental concentration is significantly above the detection limit. \"Bulk\" mode analysis was conducted to evaluate the accuracy of future elemental LAMMS microanalyses. The primary advantage of LAMMS is the inherent spatial resolution, ~ 20 ??m for coal. Two different vitrite bands in the Lower Bakerstown coal bed (CLB-1) were analyzed. The analysis did not establish any certain concentration differences in Ba, Cr, Ga, Sr, Ti, and V between the two bands. ?? 1988 Springer-Verlag.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Mikrochimica Acta","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Springer-Verlag","doi":"10.1007/BF01236096","issn":"00263672","usgsCitation":"Morelli, J., Hercules, D., Lyons, P., Palmer, C., and Fletcher, J., 1988, Using laser micro mass spectrometry with the LAMMA-1000 instrument for monitoring relative elemental concentrations in vitrinite: Mikrochimica Acta, v. 96, no. 1-6, p. 105-118, https://doi.org/10.1007/BF01236096.","startPage":"105","endPage":"118","numberOfPages":"14","costCenters":[],"links":[{"id":205644,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF01236096"},{"id":225655,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"96","issue":"1-6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bc066e4b08c986b32a0de","contributors":{"authors":[{"text":"Morelli, J.J.","contributorId":90891,"corporation":false,"usgs":true,"family":"Morelli","given":"J.J.","email":"","affiliations":[],"preferred":false,"id":369065,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hercules, D.M.","contributorId":86905,"corporation":false,"usgs":true,"family":"Hercules","given":"D.M.","email":"","affiliations":[],"preferred":false,"id":369063,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lyons, P.C.","contributorId":87285,"corporation":false,"usgs":true,"family":"Lyons","given":"P.C.","email":"","affiliations":[],"preferred":false,"id":369064,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Palmer, C.A.","contributorId":81894,"corporation":false,"usgs":true,"family":"Palmer","given":"C.A.","email":"","affiliations":[],"preferred":false,"id":369062,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Fletcher, J.D.","contributorId":24928,"corporation":false,"usgs":true,"family":"Fletcher","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":369061,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70013711,"text":"70013711 - 1988 - A late Wisconsinan marine incursion into Cape Cod Bay, Massachusetts","interactions":[],"lastModifiedDate":"2013-01-26T07:07:56","indexId":"70013711","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3218,"text":"Quaternary Research","active":true,"publicationSubtype":{"id":10}},"title":"A late Wisconsinan marine incursion into Cape Cod Bay, Massachusetts","docAbstract":"Reinterpretation of seismic-reflection data from Cape Cod Bay has produced a revised late Wisconsinan history. Acoustically laminated deposits, originally inferred to be glaciolacustrine, are shown to be glaciomarine by tracing them to glaciomarine mud in Stellwagen Basin, north of Cape Cod Bay. A late Wisconsinan marine deposit of nonglacial origin overlies the glaciomarine deposits in Cape Cod Bay. Both deposits indicate that the crust was isostatically depressed below the late Wisconsinan eustatic sea level and that deglaciation and marine submergence occurred simultaneously. Valleys cut into the marine deposits, both glacial and nonglacial, indicate that a low sea-level stand, the result of isostatic rebound, occurred shortly after the marine incursion. A transgressive uncomformity and marine deposits, both mostly of Holocene age, overlie the late Wisconsinan deposits. The marine incursion, regression, and Holocene transgression represent the northward passage of an isostatically induced peripheral bulge following deglaciation. In turn, the bulge, a response to crustal loading and unloading, indicates thick glacier ice in the terminal zone and lends support to arguments for a maximum Laurentide ice model. Evidence for a late Wisconsinan marine incursion, regression, and the passage of a peripheral bulge should be sought in the other bays and sounds of the New England terminal zone. ?? 1988.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Quaternary Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Elsevier","publisherLocation":"Amsterdam, Netherlands","doi":"10.1016/0033-5894(88)90001-4","issn":"00335894","usgsCitation":"Oldale, R.N., 1988, A late Wisconsinan marine incursion into Cape Cod Bay, Massachusetts: Quaternary Research, v. 30, no. 3, p. 237-250, https://doi.org/10.1016/0033-5894(88)90001-4.","startPage":"237","endPage":"250","numberOfPages":"14","costCenters":[],"links":[{"id":220663,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":266523,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1016/0033-5894(88)90001-4"}],"volume":"30","issue":"3","noUsgsAuthors":false,"publicationDate":"2017-01-20","publicationStatus":"PW","scienceBaseUri":"5059e434e4b0c8380cd464ce","contributors":{"authors":[{"text":"Oldale, R. N.","contributorId":92680,"corporation":false,"usgs":true,"family":"Oldale","given":"R.","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":366690,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70014732,"text":"70014732 - 1988 - A statistical method for estimating rates of soil development and ages of geologic deposits: A design for soil-chronosequence studies","interactions":[],"lastModifiedDate":"2012-03-12T17:19:32","indexId":"70014732","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2700,"text":"Mathematical Geology","active":true,"publicationSubtype":{"id":10}},"title":"A statistical method for estimating rates of soil development and ages of geologic deposits: A design for soil-chronosequence studies","docAbstract":"A statistical method for estimating rates of soil development in a given region based on calibration from a series of dated soils is used to estimate ages of soils in the same region that are not dated directly. The method is designed specifically to account for sampling procedures and uncertainties that are inherent in soil studies. Soil variation and measurement error, uncertainties in calibration dates and their relation to the age of the soil, and the limited number of dated soils are all considered. Maximum likelihood (ML) is employed to estimate a parametric linear calibration curve, relating soil development to time or age on suitably transformed scales. Soil variation on a geomorphic surface of a certain age is characterized by replicate sampling of soils on each surface; such variation is assumed to have a Gaussian distribution. The age of a geomorphic surface is described by older and younger bounds. This technique allows age uncertainty to be characterized by either a Gaussian distribution or by a triangular distribution using minimum, best-estimate, and maximum ages. The calibration curve is taken to be linear after suitable (in certain cases logarithmic) transformations, if required, of the soil parameter and age variables. Soil variability, measurement error, and departures from linearity are described in a combined fashion using Gaussian distributions with variances particular to each sampled geomorphic surface and the number of sample replicates. Uncertainty in age of a geomorphic surface used for calibration is described using three parameters by one of two methods. In the first method, upper and lower ages are specified together with a coverage probability; this specification is converted to a Gaussian distribution with the appropriate mean and variance. In the second method, \"absolute\" older and younger ages are specified together with a most probable age; this specification is converted to an asymmetric triangular distribution with mode at the most probable age. The statistical variability of the ML-estimated calibration curve is assessed by a Monte Carlo method in which simulated data sets repeatedly are drawn from the distributional specification; calibration parameters are reestimated for each such simulation in order to assess their statistical variability. Several examples are used for illustration. The age of undated soils in a related setting may be estimated from the soil data using the fitted calibration curve. A second simulation to assess age estimate variability is described and applied to the examples. ?? 1988 International Association for Mathematical Geology.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Mathematical Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Kluwer Academic Publishers-Plenum Publishers","doi":"10.1007/BF00903188","issn":"08828121","usgsCitation":"Switzer, P., Harden, J., and Mark, R.K., 1988, A statistical method for estimating rates of soil development and ages of geologic deposits: A design for soil-chronosequence studies: Mathematical Geology, v. 20, no. 1, p. 49-61, https://doi.org/10.1007/BF00903188.","startPage":"49","endPage":"61","numberOfPages":"13","costCenters":[],"links":[{"id":226041,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":205676,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00903188"}],"volume":"20","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e5afe4b0c8380cd46f01","contributors":{"authors":[{"text":"Switzer, P.","contributorId":66432,"corporation":false,"usgs":true,"family":"Switzer","given":"P.","email":"","affiliations":[],"preferred":false,"id":369154,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Harden, J.W. 0000-0002-6570-8259","orcid":"https://orcid.org/0000-0002-6570-8259","contributorId":38585,"corporation":false,"usgs":true,"family":"Harden","given":"J.W.","affiliations":[],"preferred":false,"id":369153,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mark, R. K.","contributorId":32159,"corporation":false,"usgs":true,"family":"Mark","given":"R.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":369152,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70013669,"text":"70013669 - 1988 - Physical deposit measures and commercial potential: The case of titanium-bearing heavy-mineral deposits","interactions":[],"lastModifiedDate":"2012-03-12T17:18:39","indexId":"70013669","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2700,"text":"Mathematical Geology","active":true,"publicationSubtype":{"id":10}},"title":"Physical deposit measures and commercial potential: The case of titanium-bearing heavy-mineral deposits","docAbstract":"Physical measures of mineral deposit characteristics, such as grade and tonnage, long have been used in both subjective and analytic models to predict favorability of areas for the occurrence of mineral deposits of particular types. After a deposit has been identified, however, the explorationist must decide whether to continue data collection, begin an economic feasibility study, or abandon the prospect. The decision maker can estimate the probability that a deposit will be commercial by examining physical measures. The amount of sampling data required before such a probability estimate can be considered reliable can be determined. A logit probability model estimated from onshore titanium-bearing heavy-mineral deposit data identifies and quantifies the relative influence of a deposit's physical measures on the chances of the deposit becoming commercial. A principal conclusion that can be drawn from the analysis is that, along with a measure of deposit size, the characteristics most important in predicting commercial potential are grades of the constituent minerals. Total heavy-mineral-bearing sand grade or even total titanium grade (without data on constituent mineral grades) are poor predictors of the deposit's commercial potential. ?? 1988 International Association for Mathematical Geology.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Mathematical Geology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisherLocation":"Kluwer Academic Publishers-Plenum Publishers","doi":"10.1007/BF00918880","issn":"08828121","usgsCitation":"Attanasi, E.D., and DeYoung, J., 1988, Physical deposit measures and commercial potential: The case of titanium-bearing heavy-mineral deposits: Mathematical Geology, v. 20, no. 2, p. 97-110, https://doi.org/10.1007/BF00918880.","startPage":"97","endPage":"110","numberOfPages":"14","costCenters":[],"links":[{"id":220048,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":205001,"rank":9999,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1007/BF00918880"}],"volume":"20","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a7aa7e4b0c8380cd79010","contributors":{"authors":[{"text":"Attanasi, E. D. 0000-0001-6845-7160","orcid":"https://orcid.org/0000-0001-6845-7160","contributorId":107672,"corporation":false,"usgs":true,"family":"Attanasi","given":"E.","middleInitial":"D.","affiliations":[],"preferred":false,"id":366598,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"DeYoung, J.H. Jr.","contributorId":86367,"corporation":false,"usgs":true,"family":"DeYoung","given":"J.H.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":366597,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70014767,"text":"70014767 - 1988 - Failure of self-similarity for large (Mw > 81/4) earthquakes","interactions":[],"lastModifiedDate":"2023-10-27T23:50:55.18925","indexId":"70014767","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"Failure of self-similarity for large (Mw > 81/4) earthquakes","docAbstract":"<p>Compares teleseismic P-wave records for earthquakes in the magnitude range from 6.0-9.5 with synthetics for a self-similar, omega 2 source model and conclude that the energy radiated by very large earthquakes (Mw &gt; 81/4) is not self-similar to that radiated from smaller earthquakes (Mw &lt; 81/4). Furthermore, in the period band from 2 sec to several tens of seconds, it is concluded that large subduction earthquakes have an average spectral decay rate of omega -1.5. This spectral decay rate is consistent with a previously noted tendency of the omega 2 model to overestimate Ms for large earthquakes.</p>","language":"English","publisher":"Seismological Society of America","doi":"10.1785/BSSA0780020478","usgsCitation":"Hartzell, S., and Heaton, T.H., 1988, Failure of self-similarity for large (Mw > 81/4) earthquakes: Bulletin of the Seismological Society of America, v. 78, no. 2, p. 478-488, https://doi.org/10.1785/BSSA0780020478.","productDescription":"11 p.","startPage":"478","endPage":"488","numberOfPages":"11","costCenters":[],"links":[{"id":225466,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"78","issue":"2","noUsgsAuthors":false,"publicationDate":"1988-04-01","publicationStatus":"PW","scienceBaseUri":"505a0edfe4b0c8380cd5367b","contributors":{"authors":[{"text":"Hartzell, S.H.","contributorId":27426,"corporation":false,"usgs":true,"family":"Hartzell","given":"S.H.","email":"","affiliations":[],"preferred":false,"id":369240,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Heaton, T. H.","contributorId":64671,"corporation":false,"usgs":false,"family":"Heaton","given":"T.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":369241,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70013726,"text":"70013726 - 1988 - Regression estimates for topological‐hydrograph input","interactions":[],"lastModifiedDate":"2024-05-23T14:38:34.704288","indexId":"70013726","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2501,"text":"Journal of Water Resources Planning and Management","active":true,"publicationSubtype":{"id":10}},"title":"Regression estimates for topological‐hydrograph input","docAbstract":"<p><span>Physiographic, hydrologic, and rainfall data from 18 small drainage basins in semiarid, central Wyoming were used to calibrate topological, unit‐hydrograph models for celerity, the average rate of travel of a flood wave through the basin. The data set consisted of basin characteristics and hydrologic data for the 18 basins and rainfall data for 68 storms. Calibrated values of celerity and peak discharges subsequently were regressed as a function of the basin characteristics and excess rainfall volume. Predicted values obtained in this way can be used as input for estimating hydrographs in ungaged basins. The regression models included ordinary least‐squares and seemingly unrelated regression. This latter regression model jointly estimated the celerity and peak discharge. The correlation between residuals of the celerity and peak‐discharge regressions was sufficiently large to de‐, crease the variances of estimated univariate‐model parameters.</span></p>","language":"English","publisher":"ASCE","doi":"10.1061/(ASCE)0733-9496(1988)114:4(446)","issn":"07339496","usgsCitation":"Karlinger, M.R., Guertin, D.P., and Troutman, B., 1988, Regression estimates for topological‐hydrograph input: Journal of Water Resources Planning and Management, v. 114, no. 4, p. 446-456, https://doi.org/10.1061/(ASCE)0733-9496(1988)114:4(446).","productDescription":"11 p.","startPage":"446","endPage":"456","numberOfPages":"11","costCenters":[],"links":[{"id":220111,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"114","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a9340e4b0c8380cd80ce2","contributors":{"authors":[{"text":"Karlinger, Michael R.","contributorId":10777,"corporation":false,"usgs":true,"family":"Karlinger","given":"Michael","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":366730,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Guertin, D. Phillip","contributorId":46062,"corporation":false,"usgs":false,"family":"Guertin","given":"D.","email":"","middleInitial":"Phillip","affiliations":[{"id":12625,"text":"School of Natural Resources and the Environment, University of Arizona, Tucson, AZ, 85721, USA","active":true,"usgs":false}],"preferred":false,"id":366732,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Troutman, Brent M.","contributorId":41040,"corporation":false,"usgs":true,"family":"Troutman","given":"Brent M.","affiliations":[],"preferred":false,"id":366731,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70014771,"text":"70014771 - 1988 - The seismic radiation from composite models of faulting","interactions":[],"lastModifiedDate":"2023-10-27T23:48:59.872901","indexId":"70014771","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"The seismic radiation from composite models of faulting","docAbstract":"<p>The failure of an asperity, i.e., the dynamic rupture of a small fault area with finite stress drop surrounded by a broken or weak fault area which has no stress drop but which slips after the asperity fails, is proposed as a model for the rupture process of a subevent in a composite earthquake. The rupture area of the composite earthquake surrounding the subevent is modeled by the weak fault area surrounding the asperity in the subevent model. The resulting seismic moment of the subevent is proportional to the stress drop and the rupture area of the subevent, as well as the radius of the composite earthaquake. By setting the stress drops of the asperity models equal to the dynamic stress drops of the subevents, the composite earthquake can be modeled as the sum of a set of subevents which cover the rupture area of the composite earthquake. The scaling of the high- and low-frequency radiation from composite earthquakes composed of asperities is commensurate with generally observed spectral scaling laws, in contrast to composite earthquakes composed of cracks, or smaller earthquakes. A simple filtering strategy is proposed for filtering the waveforms radiated by cracks to approximate the waveforms radiated by asperities. The P and S waves radiated by an ML = 5.2 earthquake which occurred on 9 May 1983, at Coalinga, California, are simulated using the P and S waves radiated by an ML = 3.6 aftershock. The aftershock waveforms are first filtered to approximate the radiation from asperities with the appropriate rupture areas, and then the waveforms of 12 asperity subevents are summed together to simulate the waveforms and spectra of the composite earthquake.</p>","language":"English","publisher":"Seismological Society of America","doi":"10.1785/BSSA0780020489","usgsCitation":"Boatwright, J., 1988, The seismic radiation from composite models of faulting: Bulletin of the Seismological Society of America, v. 78, no. 2, p. 489-508, https://doi.org/10.1785/BSSA0780020489.","productDescription":"20 p.","startPage":"489","endPage":"508","numberOfPages":"20","costCenters":[],"links":[{"id":422211,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.geoscienceworld.org/ssa/bssa/article/78/2/489/119046/The-seismic-radiation-from-composite-models-of"},{"id":225529,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"78","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bb008e4b08c986b324ba8","contributors":{"authors":[{"text":"Boatwright, J.","contributorId":87297,"corporation":false,"usgs":true,"family":"Boatwright","given":"J.","email":"","affiliations":[],"preferred":false,"id":369247,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":1003023,"text":"1003023 - 1988 - High-performance liquid-chromatographic separation of subcomponents of antimycin-A","interactions":[],"lastModifiedDate":"2024-04-16T23:06:51.57827","indexId":"1003023","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2213,"text":"Journal of Chromatography","active":true,"publicationSubtype":{"id":10}},"title":"High-performance liquid-chromatographic separation of subcomponents of antimycin-A","docAbstract":"<p><span>Using a reversed-phase high-performance liquid chromatographic (HPLC) technique, a mixture of antimycins A was separated into eight hitherto unreported subcomponents, A</span><sub>1a</sub><span>, A</span><sub>1b</sub><span>, A</span><sub>2a</sub><span>, A</span><sub>2b</sub><span>, A</span><sub>3a</sub><span>, A</span><sub>3b</sub><span>, A</span><sub>4a</sub><span>, and A</span><sub>4b</sub><span>. Although a base-line resolution of the known four major antimycins A</span><sub>1</sub><span>, A</span><sub>2</sub><span>, A</span><sub>3</sub><span>, and A</span><sub>4</sub><span>&nbsp;was readily achieved with mobile phases containing acetate buffers, the separation of the new antibiotic subcomponents was highly sensitive to variation in mobile phase conditions. The type and composition of organic modifiers, the nature of buffer salts, and the concentration of added electrolytes had profound effects on capacity factors, separation factors, and peak resolution values. Of the numerous chromatographic systems examined, a mobile phase consisting of methanol-water (70:30) and 0.005&nbsp;</span><i>M</i><span>&nbsp;tetrabutylammonium phosphate at pH 3.0 yielded the most satisfactory results for the separation of the subcomponents. Reversed-phase gradient HPLC separation of the dansylated or methylated antibiotic compounds produced superior chromatographic characteristics and the presence of added electrolytes was not a critical factor for achieving separation. Differences in the chromatographic outcome between homologous and structural isomers were interpretated based on a differential solvophobic interaction rationale. Preparative reversed-phase HPLC under optimal conditions enabled isolation of pure samples of the methylated antimycin subcomponents for use in structural studies.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0021-9673(88)90007-6","usgsCitation":"Abidi, S.L., 1988, High-performance liquid-chromatographic separation of subcomponents of antimycin-A: Journal of Chromatography, v. 447, no. 1, p. 65-79, https://doi.org/10.1016/0021-9673(88)90007-6.","productDescription":"15 p.","startPage":"65","endPage":"79","numberOfPages":"15","costCenters":[{"id":606,"text":"Upper Midwest Environmental Sciences Center","active":true,"usgs":true}],"links":[{"id":131309,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"447","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a60e4b07f02db635313","contributors":{"authors":[{"text":"Abidi, S. L.","contributorId":19898,"corporation":false,"usgs":true,"family":"Abidi","given":"S.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":312614,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70014816,"text":"70014816 - 1988 - New trend- trigonometric model for interpolation and prediction of the geomagnetic field utilizing the new DGRF models","interactions":[],"lastModifiedDate":"2024-04-25T00:03:54.520529","indexId":"70014816","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2310,"text":"Journal of Geomagnetism & Geoelectricity","active":true,"publicationSubtype":{"id":10}},"title":"New trend- trigonometric model for interpolation and prediction of the geomagnetic field utilizing the new DGRF models","docAbstract":"<p>At the IUGG Assembly at Vancouver during August 1987 new definitive geomagnetic reference field (DGRF) models to degree 10 for 1945, 1950, 1955, and 1960 were adopted by IAGA. Before these new DGRF models were accepted, the author developed a trend and trigonometric model (old trig model) based on the models IGRF 1945, IGRF 1950, IGRF 1955, IGRF 1960, DGRF 1965, DGRF 1970, DGRF 1975, DGRF 1980, and IGRF 1985, which were all approved by IAGA in Prague in August 1985. The old trig model consists of 720 trend and trigonometric coefficients for the calculation of spherical harmonic coefficients (SHC) only to degree eight because the early IGRF models were truncated there. These trend and Fourier sine coefficients can replace the equal number of SHC contained in the 9 DGRF-IGRF models.&nbsp;</p>","language":"English","publisher":"J-STAGE","doi":"10.5636/jgg.40.749","usgsCitation":"Alldredge, L., 1988, New trend- trigonometric model for interpolation and prediction of the geomagnetic field utilizing the new DGRF models: Journal of Geomagnetism & Geoelectricity, v. 40, no. 6, p. 749-759, https://doi.org/10.5636/jgg.40.749.","productDescription":"11 p.","startPage":"749","endPage":"759","numberOfPages":"11","costCenters":[],"links":[{"id":480023,"rank":2,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.5636/jgg.40.749","text":"Publisher Index Page"},{"id":226182,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"40","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a661ce4b0c8380cd72d18","contributors":{"authors":[{"text":"Alldredge, L.R.","contributorId":53457,"corporation":false,"usgs":true,"family":"Alldredge","given":"L.R.","email":"","affiliations":[],"preferred":false,"id":369356,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70014285,"text":"70014285 - 1988 - Assessing the Birkenes Model of stream acidification using a multisignal calibration methodology","interactions":[],"lastModifiedDate":"2018-02-21T11:04:20","indexId":"70014285","displayToPublicDate":"1988-01-01T00:00:00","publicationYear":"1988","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3722,"text":"Water Resources Research","onlineIssn":"1944-7973","printIssn":"0043-1397","active":true,"publicationSubtype":{"id":10}},"title":"Assessing the Birkenes Model of stream acidification using a multisignal calibration methodology","docAbstract":"<p><span>A revision of the Birkenes model of streamwater acidification has been attempted to incorporate additional chemical and hydrologic information gained in the last 6 years since its original construction. The first stage of this effort has been an analysis of the hydrologic submodel with the goal of extending it to predict concentrations of a conservative tracer in streamwater. An objective calibration of the model indicated that the model is overparameterized. Only one passive store is identifiabile, not two as currently contained in the model and the routing between the two reservoirs is not determined by the data. Inclusion of the conservative tracer improved the identifiability of the dimensional parameters, but had little effect on the rate or routing parameters. If the hydrologic structure is to be determined from the hydrograph and conservative tracer alone, it must be simplified to eliminate unidentifiable parameters. The validity of using more complex rainfall-runoff models in hydrochemical models which seek to test chemical mechanisms is called into question by this analysis.</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/WR024i008p01308","usgsCitation":"Hooper, R.P., Stone, A., Christophersen, N., Grosbois, D., and Seip, H.M., 1988, Assessing the Birkenes Model of stream acidification using a multisignal calibration methodology: Water Resources Research, v. 24, no. 8, p. 1308-1316, https://doi.org/10.1029/WR024i008p01308.","productDescription":"9 p.","startPage":"1308","endPage":"1316","costCenters":[],"links":[{"id":225946,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"24","issue":"8","noUsgsAuthors":false,"publicationDate":"2010-07-09","publicationStatus":"PW","scienceBaseUri":"5059ede4e4b0c8380cd49aa5","contributors":{"authors":[{"text":"Hooper, Richard P.","contributorId":19144,"corporation":false,"usgs":true,"family":"Hooper","given":"Richard","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":368033,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stone, Alex","contributorId":198669,"corporation":false,"usgs":false,"family":"Stone","given":"Alex","email":"","affiliations":[],"preferred":false,"id":368034,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Christophersen, Nils","contributorId":198668,"corporation":false,"usgs":false,"family":"Christophersen","given":"Nils","email":"","affiliations":[],"preferred":false,"id":368035,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Grosbois, de","contributorId":77668,"corporation":false,"usgs":false,"family":"Grosbois","given":"de","email":"","affiliations":[],"preferred":false,"id":368037,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Seip, Hans M.","contributorId":69720,"corporation":false,"usgs":false,"family":"Seip","given":"Hans","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":368036,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
]}