The crystal structures of the isomorphous salts MI6[Mo7O24],4H2O (M = NH4 or K) have been refined by three-dimensional X-ray diffraction methods. Unit cell dimensions of these monoclinic compounds, space group P21/C with Z= 4, are, ammonium salt: a= 8·3934 ± 0·0008, b= 36·1703 ± 0·0045, c= 10·4715 ± 0·0011 Å, β= 115·958°± 0·008°; and potassium salt: a= 8·15 ± 0·02, b= 35·68 ± 0·1, c= 10·30 ± 0·02 Å, β= 115·2°± 02°.
By use of multiple Weissenberg patterns, 8197 intensity data (Mo-Kα radiation) for the ammonium compound and 2178 (Cu-Kα radiation) for the potassium compound were estimated visually and used to test and refine Lindqvist's proposed structure in the space group P21/c. Lindqvist's structure was confirmed and the full matrix least-squares isotropic refinement led to R 0·076 (ammonium) 0·120 (potassium), with direct unambiguous location of the cations and water molecules in the potassium compound.
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California","interactions":[],"lastModifiedDate":"2024-09-24T18:37:08.869569","indexId":"70206943","displayToPublicDate":"1975-06-01T08:11:49","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"K-Ar ages of Pleistocene rhyolitic volcanism in the Coso Range, California","docAbstract":"Rhyolite domes and rhyolite and basalt flows near Coso Hot Springs in the Coso Range, California, give K-Ar ages that range from about 0.04 ± 0.02 m.y. to 0.96 ± 0.19 m.y. Most of the units appear to be between 0.05 and 0.15 m.y. old. The total volume of erupted rhyolitic magma is about 2.4 km3. The age, volume, and composition of these volcanic rocks indicate that the Coso volcanic field is a potential geothermal resource area.
","language":"English","publisher":"GeScience World","doi":"10.1130/0091-7613(1975)3<339:KAOPRV>2.0.CO;2","usgsCitation":"Lanphere, M.A., Dalrymple, G.B., and Smith, R.L., 1975, K-Ar ages of Pleistocene rhyolitic volcanism in the Coso Range, California: Geology, v. 3, no. 6, p. 339-341, https://doi.org/10.1130/0091-7613(1975)3<339:KAOPRV>2.0.CO;2.","productDescription":"3 p.","startPage":"339","endPage":"341","costCenters":[],"links":[{"id":369773,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Coso Range","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -117.95202030068728,\n 36.322681707968925\n ],\n [\n -117.95202030068728,\n 36.113076055922946\n ],\n [\n -117.51321427449872,\n 36.113076055922946\n ],\n [\n -117.51321427449872,\n 36.322681707968925\n ],\n [\n -117.95202030068728,\n 36.322681707968925\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"3","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Lanphere, Marvin A. alder@usgs.gov","contributorId":2696,"corporation":false,"usgs":true,"family":"Lanphere","given":"Marvin","email":"alder@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":true,"id":776344,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dalrymple, G. Brent","contributorId":54564,"corporation":false,"usgs":true,"family":"Dalrymple","given":"G.","email":"","middleInitial":"Brent","affiliations":[],"preferred":false,"id":776345,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Smith, Robert L.","contributorId":90803,"corporation":false,"usgs":true,"family":"Smith","given":"Robert","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":776346,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":5221354,"text":"5221354 - 1975 - Organochlorine insecticide residues in the free-tailed bat (Tadarida brasiliensis) at Bracken Cave, Texas","interactions":[],"lastModifiedDate":"2025-03-10T15:50:15.234645","indexId":"5221354","displayToPublicDate":"1975-05-30T00:00:00","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2373,"text":"Journal of Mammalogy","onlineIssn":"1545-1542","printIssn":"0022-2372","active":true,"publicationSubtype":{"id":10}},"title":"Organochlorine insecticide residues in the free-tailed bat (Tadarida brasiliensis) at Bracken Cave, Texas","docAbstract":"Fifty-nine free-tailed bats (Tadarida brasiliensis mexicana) were collected at Bracken Cave, Texas, and analyzed for organochlorine insecticides and polyehiorinated biphenyls (PCBs). Residues of DDE in the brain were greater in 12 young collected from the floor than in 15 young taken from the ceiling, but food deprivation, not higher residues in the brain, apparently caused young to fall.
Among 18 pregnant females, residues of DDE and DDT were highest in yearlings. The first lactation by yearlings caused their residue loads to drop sharply. Thereafter, increasing age was accompanied by increasing residues but amounts generally did not exceed those in yearlings.
Residue levels in embryos were a function both of levels in the female parent and degree of embryonic development. Residues accumulated rapidly in nursing young, and lactating females may excrete from 1.3 to 16.2 (mean = 4.3) micrograms of DDE in milk per day. Maximum individual residue loads may be attained toward the end of nursing, and mobilization of these residues during southward migration may subject Bracken Cave free-tails to maximum lifetime residues in the brain.
Comparison of our data with residue data for the free-tail population at Eagle Creek Cave (Arizona) in 1970 produced the following conclusions: (1) residues of DDE appeared similar in pregnant females, embryos, lactating females, and fallen young for the two populations; (2) residues of DDT and dieldrin appeared greater in pregnant females at Bracken Cave; (3) DDE and DDT occurred at greater levels in guano samples from Bracken Cave. On this basis, the population decline observed at Eagle Creek Cave between 1963 and 1969 does not appear to be related to the residues observed in the 1970 samples taken from that cave.
","language":"English","publisher":"Oxford Academic","doi":"10.2307/1379372","usgsCitation":"Clark, D.R., Martin, C., and Swineford, D.M., 1975, Organochlorine insecticide residues in the free-tailed bat (Tadarida brasiliensis) at Bracken Cave, Texas: Journal of Mammalogy, v. 56, no. 2, p. 429-443, https://doi.org/10.2307/1379372.","productDescription":"15 p.","startPage":"429","endPage":"443","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":198684,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Texas","otherGeospatial":"Bracken Cave","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -98.38200279357574,\n 29.70387840977898\n ],\n [\n -98.38200279357574,\n 29.671080375264665\n ],\n [\n -98.34342718386542,\n 29.671080375264665\n ],\n [\n -98.34342718386542,\n 29.70387840977898\n ],\n [\n -98.38200279357574,\n 29.70387840977898\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"56","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae5e4b07f02db68a9f8","contributors":{"authors":[{"text":"Clark, D. R. Jr.","contributorId":40928,"corporation":false,"usgs":true,"family":"Clark","given":"D.","suffix":"Jr.","middleInitial":"R.","affiliations":[],"preferred":false,"id":333629,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Martin, C.O.","contributorId":96801,"corporation":false,"usgs":true,"family":"Martin","given":"C.O.","email":"","affiliations":[],"preferred":false,"id":333630,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Swineford, D. M.","contributorId":106839,"corporation":false,"usgs":true,"family":"Swineford","given":"D.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":333631,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70010058,"text":"70010058 - 1975 - Magma beneath Yellowstone National Park","interactions":[],"lastModifiedDate":"2026-01-22T16:20:52.047577","indexId":"70010058","displayToPublicDate":"1975-05-23T00:00:00","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Magma beneath Yellowstone National Park","docAbstract":"The Yellowstone plateau volcanic field is less than 2 million years old, lies in a region of intense tectonic and hydrothermal activity, and probably has the potential for further volcanic activity. The youngest of three volcanic cycles in the field climaxed 600,000 years ago with a voluminous ashflow eruption and the collapse of two contiguous cauldron blocks. Doming 150,000 years ago, followed by voluminous rhyolitic extrusions as recently as 70,000 years ago, and high convective heat flow at present indicate that the latest phase of volcanism may represent a new magmatic insurgence. These observations, coupled with (i) localized postglacial arcuate faulting beyond the northeast margin of the Yellowstone caldera, (ii) a major gravity low with steep bounding gradients and an amplitude regionally atypical for the elevation of the plateau, (iii) an aeromagnetic low reflecting extensive hydrothermal alteration and possibly indicating the presence of shallow material above its Curie temperature, (iv) only minor shallow seismicity within the caldera (in contrast to a high level of activity in some areas immediately outside), (v) attenuation and change of character of seismic waves crossing the caldera area, and (vi) a strong azimuthal pattern of teleseismic P-wave delays, strongly suggest that a body composed at least partly of magma underlies the region of the rhyolite plateau, including the Tertiary volcanics immediately to its northeast.
The Yellowstone field represents the active end of a system of similar volcanic foci that has migrated progressively northeastward for 15 million years along the trace of the eastern Snake River Plain. Regional aeromagnetic patterns suggest that this course was guided by the structure of the Precambrian basement. If, as suggested by several investigators, the Yellowstone magma body marks a contemporary deep mantle plume, this plume, in its motion relative to the North American plate, would appear to be \"navigating\" along a fundamental structure in the relatively shallow and brittle lithosphere overhead. The concept that a northeastward-propagating major crustal fracture controls the migration path of the major foc
","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.188.4190.787","issn":"00368075","usgsCitation":"Eaton, G.P., Christiansen, R., Iyer, H.M., Pitt, A., Mabey, D.R., Blank, H.R., Zietz, I., and Gettings, M.E., 1975, Magma beneath Yellowstone National Park: Science, v. 188, no. 4190, p. 787-796, https://doi.org/10.1126/science.188.4190.787.","productDescription":"10 p.","startPage":"787","endPage":"796","costCenters":[],"links":[{"id":219050,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Wyoming","otherGeospatial":"Yellowstone National Park","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -111.05452988210584,\n 45.001567911812685\n ],\n [\n -111.05452988210584,\n 44.21912149360787\n ],\n [\n -110.01925687870283,\n 44.21912149360787\n ],\n [\n -110.01925687870283,\n 45.001567911812685\n ],\n [\n -111.05452988210584,\n 45.001567911812685\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"188","issue":"4190","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a4b2fe4b0c8380cd69352","contributors":{"authors":[{"text":"Eaton, G. P.","contributorId":86334,"corporation":false,"usgs":true,"family":"Eaton","given":"G.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":357797,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Christiansen, R.L. 0000-0002-8017-3918","orcid":"https://orcid.org/0000-0002-8017-3918","contributorId":25565,"corporation":false,"usgs":true,"family":"Christiansen","given":"R.L.","affiliations":[],"preferred":false,"id":357794,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Iyer, H. M.","contributorId":17997,"corporation":false,"usgs":true,"family":"Iyer","given":"H.","middleInitial":"M.","affiliations":[],"preferred":false,"id":357792,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Pitt, A.D.","contributorId":41440,"corporation":false,"usgs":true,"family":"Pitt","given":"A.D.","affiliations":[],"preferred":false,"id":357795,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Mabey, D. R.","contributorId":15989,"corporation":false,"usgs":true,"family":"Mabey","given":"D.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":357791,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Blank, H. R. Jr.","contributorId":94674,"corporation":false,"usgs":true,"family":"Blank","given":"H.","suffix":"Jr.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":357798,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Zietz, I.","contributorId":59937,"corporation":false,"usgs":true,"family":"Zietz","given":"I.","email":"","affiliations":[],"preferred":false,"id":357796,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Gettings, M. E.","contributorId":25148,"corporation":false,"usgs":true,"family":"Gettings","given":"M.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":357793,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70227168,"text":"70227168 - 1975 - Application of ERTS images and image processing to regional geologic problems and geologic mapping in northern Arizona","interactions":[],"lastModifiedDate":"2022-01-03T18:00:39.939625","indexId":"70227168","displayToPublicDate":"1975-05-15T11:30:55","publicationYear":"1975","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":3,"text":"Organization Series"},"seriesTitle":{"id":222,"text":"Technical Report","active":false,"publicationSubtype":{"id":3}},"seriesNumber":"32-1597","title":"Application of ERTS images and image processing to regional geologic problems and geologic mapping in northern Arizona","docAbstract":"The purpose of this study was to apply the techniques of computer image processing to ERTS images as an aid to the solution of some regional geologic problems of significant interest.
ERTS-1 images were applied to studies in the Shivwits Plateau, Coconino Plateau, and north-central Arizona regions. Unprocessed ERTS images revealed a wealth of new structural information and enabled a broad regional study to be made of the tectonic history of the southwestern Colorado Plateau.
Spectral information from ERTS-1 was shown to be compatible with ground spectral reflectance measurements made with a portable field instrument developed during this investigation, provided that allowance was made for atmospheric effects.
Computer image processing yielded lithologic boundary information within the Coconino Plateau region not obtainable from unprocessed images. Various enhancement techniques were compared in the three areas of study, and some simple rules were developed to guide the processing of images in unknown areas.
A new hypothesis was developed for the history of the Colorado River. An ancestral and relatively old Upper Colorado Drainage followed approximately its present course as far as the western side of the Kaibab Uplift, where it diverged from the present course by following a strike valley trending north-northwest. This drainage was captured relatively recently by a much younger Lower Colorado Drainage, which developed by headward erosion after the opening of the Gulf of California.
A byproduct of the regional studies in each of the three areas was the identification of areas favorable for the localization of shallow and deep ground waters. On the Shivwits Plateau water trapped in the axis of the old strike valley underlying the Shivwits lavas is a potential source. On the Coconino Plateau sandstone lenses, underlain by clays, within the otherwise permeable Kaibab Limestone are potential perched aquifers. These can be identified on computer-enhanced images. Lineaments detected first on ERTS-1 frames and later verified on aerial photographs were used south of Flagstaff, Arizona, to identify maximum fracturing along the Oak Creek fault in the Woody Mountain well field; a site for a new deep well has been selected and is being drilled by the city of Flagstaff.
","language":"English","publisher":"Jet Propulsion Laboratory","usgsCitation":"Goetz, A.F., Billingsley, F.C., Gillespie, A.R., Abrams, M.J., Squires, R.L., Shoemaker, E.M., Lucchitta, I., and Elston, D.P., 1975, Application of ERTS images and image processing to regional geologic problems and geologic mapping in northern Arizona: Technical Report 32-1597, xiv, 188 p.","productDescription":"xiv, 188 p.","costCenters":[],"links":[{"id":393729,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":393728,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://ntrs.nasa.gov/api/citations/19750019447/downloads/19750019447.pdf","size":"123 MB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Arizona","otherGeospatial":"Bright Angel fault system, Coconino Plateau, Mesa Butte fault system, Shivwits Plateau, Verde Valley","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -114.04907226562499,\n 35.33977430038646\n ],\n [\n -111.258544921875,\n 35.33977430038646\n ],\n [\n -111.258544921875,\n 37.01132594307015\n ],\n [\n -114.04907226562499,\n 37.01132594307015\n ],\n [\n -114.04907226562499,\n 35.33977430038646\n ]\n ]\n ]\n }\n },\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -112.39837646484375,\n 33.47039910425851\n ],\n [\n -110.59661865234375,\n 33.47039910425851\n ],\n [\n -110.59661865234375,\n 34.84536693184101\n ],\n [\n -112.39837646484375,\n 34.84536693184101\n ],\n [\n -112.39837646484375,\n 33.47039910425851\n ]\n ]\n ]\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Goetz, Alexander F.H.","contributorId":43747,"corporation":false,"usgs":true,"family":"Goetz","given":"Alexander","middleInitial":"F.H.","affiliations":[],"preferred":false,"id":829875,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Billingsley, Frederic C.","contributorId":149240,"corporation":false,"usgs":false,"family":"Billingsley","given":"Frederic","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":829876,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gillespie, A. R","contributorId":118218,"corporation":false,"usgs":true,"family":"Gillespie","given":"A.","email":"","middleInitial":"R","affiliations":[],"preferred":false,"id":829877,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Abrams, M. J.","contributorId":29859,"corporation":false,"usgs":true,"family":"Abrams","given":"M.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":829878,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Squires, R. L.","contributorId":270733,"corporation":false,"usgs":false,"family":"Squires","given":"R.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":829879,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Shoemaker, Eugene Merle","contributorId":20342,"corporation":false,"usgs":true,"family":"Shoemaker","given":"Eugene","email":"","middleInitial":"Merle","affiliations":[],"preferred":false,"id":829880,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Lucchitta, I.","contributorId":43916,"corporation":false,"usgs":true,"family":"Lucchitta","given":"I.","email":"","affiliations":[],"preferred":false,"id":829881,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Elston, D. P.","contributorId":96334,"corporation":false,"usgs":true,"family":"Elston","given":"D.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":829882,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":70210120,"text":"70210120 - 1975 - Discussion on K-Ar relations of granodiorite emplacement and tungsten and gold mineralization near the Getchell Mine, Humboldt County, Nevada: A reply","interactions":[],"lastModifiedDate":"2020-05-15T13:20:54.745387","indexId":"70210120","displayToPublicDate":"1975-05-14T13:04:52","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Discussion on K-Ar relations of granodiorite emplacement and tungsten and gold mineralization near the Getchell Mine, Humboldt County, Nevada: A reply","docAbstract":"No abstract available.
","language":"English","publisher":"SPEM","doi":"10.2113/gsecongeo.70.8.1487","usgsCitation":"Berger, B.R., Silberman, M., and Koski, R.A., 1975, Discussion on K-Ar relations of granodiorite emplacement and tungsten and gold mineralization near the Getchell Mine, Humboldt County, Nevada: A reply: Economic Geology, v. 70, no. 8, p. 1487-1491, https://doi.org/10.2113/gsecongeo.70.8.1487.","productDescription":"5 p.","startPage":"1487","endPage":"1491","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":374837,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Nevada","county":"Humboldt","otherGeospatial":"Getchell Mine","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -117.92724609375,\n 40.094882122321145\n ],\n [\n -117.103271484375,\n 40.094882122321145\n ],\n [\n -117.103271484375,\n 41.393294288784865\n ],\n [\n -117.92724609375,\n 41.393294288784865\n ],\n [\n -117.92724609375,\n 40.094882122321145\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"70","issue":"8","noUsgsAuthors":false,"publicationDate":"1975-12-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Berger, B. R.","contributorId":77914,"corporation":false,"usgs":true,"family":"Berger","given":"B.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":789198,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Silberman, M.L.","contributorId":10013,"corporation":false,"usgs":true,"family":"Silberman","given":"M.L.","affiliations":[],"preferred":false,"id":789199,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Koski, Randolph A. rkoski@usgs.gov","contributorId":2949,"corporation":false,"usgs":true,"family":"Koski","given":"Randolph","email":"rkoski@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":true,"id":789200,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70209952,"text":"70209952 - 1975 - Chemical halos as guides to lode deposit ore in the Park City District, Utah","interactions":[],"lastModifiedDate":"2020-05-07T12:25:16.612539","indexId":"70209952","displayToPublicDate":"1975-05-06T14:51:02","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Chemical halos as guides to lode deposit ore in the Park City District, Utah","docAbstract":"No abstract available.
","language":"English","publisher":"SPEM","doi":"10.2113/gsecongeo.70.5.995","usgsCitation":"Chaffee, M.A., 1975, Chemical halos as guides to lode deposit ore in the Park City District, Utah: Economic Geology, v. 70, no. 5, p. 995-995, https://doi.org/10.2113/gsecongeo.70.5.995.","productDescription":"1 p.","startPage":"995","endPage":"995","costCenters":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"links":[{"id":374503,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Utah","otherGeospatial":"Park City District","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -111.64443969726562,\n 40.54093880017256\n ],\n [\n -111.37390136718749,\n 40.54093880017256\n ],\n [\n -111.37390136718749,\n 40.75037808986467\n ],\n [\n -111.64443969726562,\n 40.75037808986467\n ],\n [\n -111.64443969726562,\n 40.54093880017256\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"70","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Chaffee, Maurice A. mchaffee@usgs.gov","contributorId":4047,"corporation":false,"usgs":true,"family":"Chaffee","given":"Maurice","email":"mchaffee@usgs.gov","middleInitial":"A.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":788607,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70209870,"text":"70209870 - 1975 - Preparation and use of isopleth maps of landslide deposits: Comment and reply: REPLY","interactions":[],"lastModifiedDate":"2020-05-01T19:21:58.803319","indexId":"70209870","displayToPublicDate":"1975-05-01T14:09:01","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Preparation and use of isopleth maps of landslide deposits: Comment and reply: REPLY","docAbstract":"No abstract available.
","language":"English","publisher":"GSA","doi":"10.1130/0091-7613(1975)3<217b:PAUOIM>2.0.CO;2","usgsCitation":"Wright, R.H., Campbell, R.H., and Nilsen, T.H., 1975, Preparation and use of isopleth maps of landslide deposits: Comment and reply: REPLY: Geology, v. 3, no. 4, p. 217-218, https://doi.org/10.1130/0091-7613(1975)3<217b:PAUOIM>2.0.CO;2.","productDescription":"2 p.","startPage":"217","endPage":"218","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":374435,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"3","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Wright, R. H.","contributorId":101629,"corporation":false,"usgs":true,"family":"Wright","given":"R.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":788338,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Campbell, R. H.","contributorId":52160,"corporation":false,"usgs":true,"family":"Campbell","given":"R.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":788339,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nilsen, T. H.","contributorId":93057,"corporation":false,"usgs":true,"family":"Nilsen","given":"T.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":788340,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70232593,"text":"70232593 - 1975 - A procedure, using hydrofluoric acid, for quantitative mineral separations from silicate rocks","interactions":[],"lastModifiedDate":"2022-07-07T18:12:38.43118","indexId":"70232593","displayToPublicDate":"1975-05-01T13:06:00","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"A procedure, using hydrofluoric acid, for quantitative mineral separations from silicate rocks","docAbstract":"Some minerals of silicate rocks can be quantitatively recovered from rock fragments by prolonged digestion in cold, concentrated hydrofluoric acid. The procedure yields clean, physically unharmed crystals, mostly of minerals that occur largely or only in trace amounts.
","language":"English","publisher":"U. S. Geological Survey","usgsCitation":"Neuerburg, G.J., 1975, A procedure, using hydrofluoric acid, for quantitative mineral separations from silicate rocks: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 377-378.","productDescription":"2 p.","startPage":"377","endPage":"378","costCenters":[],"links":[{"id":403195,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403193,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Neuerburg, George J.","contributorId":103661,"corporation":false,"usgs":true,"family":"Neuerburg","given":"George","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":846029,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70232592,"text":"70232592 - 1975 - A computer-assisted procedure for information processing of geologic field data","interactions":[],"lastModifiedDate":"2022-07-08T15:42:36.819373","indexId":"70232592","displayToPublicDate":"1975-05-01T12:50:53","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"A computer-assisted procedure for information processing of geologic field data","docAbstract":"We have examined several computer systems to see how they could aid information processing of geologic field data. The processing procedure we have chosen combines a systematic note-taking technique, a computer text-editor for creating files of data, and automated printing of selected data or of complete file copies. Traditional text notes are the foundation of each station record, and no coding of data is required. The text-editor used is an interactive computer system that allows any individual with typing skills to build and use data files. On the basis of our experience, an interactive text-editor can readily fulfill the data-handling needs of most geologic field projects and offers important advantages over other systems that were examined.
","language":"English","publisher":"U. S. Geological Survey","usgsCitation":"Hudson, T., Askevold, G., and Plafker, G., 1975, A computer-assisted procedure for information processing of geologic field data: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 369-375.","productDescription":"7 p.","startPage":"369","endPage":"375","costCenters":[],"links":[{"id":403191,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403190,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Hudson, Travis","contributorId":90282,"corporation":false,"usgs":true,"family":"Hudson","given":"Travis","affiliations":[],"preferred":false,"id":846026,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Askevold, Gerald","contributorId":292879,"corporation":false,"usgs":false,"family":"Askevold","given":"Gerald","email":"","affiliations":[],"preferred":false,"id":846027,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Plafker, George","contributorId":3920,"corporation":false,"usgs":false,"family":"Plafker","given":"George","email":"","affiliations":[],"preferred":false,"id":846028,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70232591,"text":"70232591 - 1975 - A characteristic pattern of disequilibrium in some uranium ore deposits","interactions":[],"lastModifiedDate":"2022-07-07T17:35:14.903215","indexId":"70232591","displayToPublicDate":"1975-05-01T12:29:24","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"A characteristic pattern of disequilibrium in some uranium ore deposits","docAbstract":"A redistribution of radium-226 in uranium ore deposits produces a characteristic pattern of disequilibrium in which uranium is greater than equivalent uranium in high-grade samples and equivalent uranium is greater than uranium in low-grade samples. The redistribution is a continuous process in uranium deposits, and the resulting pattern of disequilibrium is itself a system in equilibrium.
","language":"English","publisher":"U. S. Geological Survey","usgsCitation":"Santos, E.S., 1975, A characteristic pattern of disequilibrium in some uranium ore deposits: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 363-368.","productDescription":"6 p.","startPage":"363","endPage":"368","costCenters":[],"links":[{"id":403189,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403188,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Santos, Elmer S.","contributorId":94312,"corporation":false,"usgs":true,"family":"Santos","given":"Elmer","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":846025,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70232590,"text":"70232590 - 1975 - Rockfall seismicity correlation with field observations, Makaopuhi Crater, Kilauea Volcano, Hawaii","interactions":[],"lastModifiedDate":"2022-07-08T15:43:42.358551","indexId":"70232590","displayToPublicDate":"1975-05-01T12:12:38","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Rockfall seismicity correlation with field observations, Makaopuhi Crater, Kilauea Volcano, Hawaii","docAbstract":"During August 7-13, 1972, intense and sustained rockfall activity occurred in Makaopuhi Crater on the east-rift zone of Kilauea Volcano. In a 4-day period (August 7-10), approximately 270,000 m3 of rockfall debris accumulated in Makaopuhi's west pit, representing a total kinetic energy release of about 101B ergs. Because the rockfalls happened within an area with an established seismic network, it was possible to correlate the seismic record of the rockfalls with onsite field observations. The seismic signatures of rockfalls are generally distinguishable from those of earthquakes and other recorded events. Approximate magnitudes determined for some of the largest rockfalls range from 0.8 to 1.2, corresponding to calculated seismic energy releases of 2X1011 to 10X1011 ergs, if the magnitude-energy relationship for earthquakes is applicable to rockfalls. The August 1972 swarms of rockfalls at Makaopuhi correlate in time not with moderate or large earthquakes but rather with local eruptive activity and are inferred to have been caused by eruption-induced modifications of stress patterns of the crater walls. However, the amount and nature of the stress change required to exceed the threshold stability of the crater wall and to trigger a rockfall flurry cannot be determined. The Makaopuhi activity is typical of most major rockfall episodes in other Kilauean pit craters in recent years, which also have been associated with volcanic activity, particularly during times of changes in eruptive behavior.
","language":"English","publisher":"U.S. Geological Survey","usgsCitation":"Tilling, R.I., Koyanagi, R.Y., and Holcomb, R.T., 1975, Rockfall seismicity correlation with field observations, Makaopuhi Crater, Kilauea Volcano, Hawaii: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 345-361.","productDescription":"17 p.","startPage":"345","endPage":"361","costCenters":[],"links":[{"id":403186,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403184,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Hawai'i","otherGeospatial":"Kilauea Volcano, Makaopuhi Crater","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -155.16729354858398,\n 19.35985853308795\n ],\n [\n -155.16458988189697,\n 19.36062781661234\n ],\n [\n -155.16240119934082,\n 19.362409301365904\n ],\n [\n -155.16175746917725,\n 19.363866865322365\n ],\n [\n -155.16167163848874,\n 19.365526852845328\n ],\n [\n -155.16252994537354,\n 19.36767266532593\n ],\n [\n -155.16390323638916,\n 19.368684831219216\n ],\n [\n -155.16570568084717,\n 19.369373100436274\n ],\n [\n -155.16669273376465,\n 19.369332614092194\n ],\n [\n -155.16634941101074,\n 19.370020880573616\n ],\n [\n -155.16772270202637,\n 19.370466227924478\n ],\n [\n -155.16982555389404,\n 19.370223311338513\n ],\n [\n -155.17119884490967,\n 19.36908969581655\n ],\n [\n -155.17343044281006,\n 19.369494559408146\n ],\n [\n -155.17596244812012,\n 19.36908969581655\n ],\n [\n -155.17755031585693,\n 19.367146336577406\n ],\n [\n -155.17712116241455,\n 19.364960029737954\n ],\n [\n -155.1756191253662,\n 19.363300036443277\n ],\n [\n -155.17197132110596,\n 19.361194654781624\n ],\n [\n -155.16729354858398,\n 19.35985853308795\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Tilling, Robert I. 0000-0003-4263-7221 rtilling@usgs.gov","orcid":"https://orcid.org/0000-0003-4263-7221","contributorId":2567,"corporation":false,"usgs":true,"family":"Tilling","given":"Robert","email":"rtilling@usgs.gov","middleInitial":"I.","affiliations":[],"preferred":true,"id":846022,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Koyanagi, Robert Y.","contributorId":52561,"corporation":false,"usgs":true,"family":"Koyanagi","given":"Robert","email":"","middleInitial":"Y.","affiliations":[],"preferred":false,"id":846023,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Holcomb, Robin T.","contributorId":46938,"corporation":false,"usgs":true,"family":"Holcomb","given":"Robin","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":846024,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70232542,"text":"70232542 - 1975 - Relations between thermal, photographic, and topographic linears and mapped and measured structures in a Precambrian terrane in Colorado","interactions":[],"lastModifiedDate":"2022-07-06T16:54:14.189843","indexId":"70232542","displayToPublicDate":"1975-05-01T11:43:11","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Relations between thermal, photographic, and topographic linears and mapped and measured structures in a Precambrian terrane in Colorado","docAbstract":"Comparison of orientation of faults, foliations, and joints, observed during geologic mapping in Colorado, with thermal, photographic, and topographic linears shows that topographic linears are statistically useful indicators of mappable faults and fractures, photographic linears are less useful, and thermal linears, believed to represent zones of moisture concentration, are parallel to faults, foliations, and, a statistically minor, but more open joint set.
","language":"English","publisher":"U. S. Geological Survey","usgsCitation":"Bryant, B., Offield, T., and Schmidt, P.W., 1975, Relations between thermal, photographic, and topographic linears and mapped and measured structures in a Precambrian terrane in Colorado: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 295-303.","productDescription":"9 p.","startPage":"295","endPage":"303","costCenters":[],"links":[{"id":403077,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403076,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Colorado","city":"Evergreen","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -105.47561645507812,\n 39.6088622615816\n ],\n [\n -105.1666259765625,\n 39.6088622615816\n ],\n [\n -105.1666259765625,\n 39.90657598772839\n ],\n [\n -105.47561645507812,\n 39.90657598772839\n ],\n [\n -105.47561645507812,\n 39.6088622615816\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Bryant, Bruce bbryant@usgs.gov","contributorId":1355,"corporation":false,"usgs":true,"family":"Bryant","given":"Bruce","email":"bbryant@usgs.gov","affiliations":[],"preferred":false,"id":845894,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Offield, Terry W.","contributorId":64217,"corporation":false,"usgs":true,"family":"Offield","given":"Terry W.","affiliations":[],"preferred":false,"id":845895,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schmidt, Paul W.","contributorId":61160,"corporation":false,"usgs":true,"family":"Schmidt","given":"Paul","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":845896,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70232589,"text":"70232589 - 1975 - The influence of late Cenozoic stratigraphy on distribution of impoundment-related seismicity at Lake Mead, Nevada-Arizona","interactions":[],"lastModifiedDate":"2022-07-07T17:04:40.345225","indexId":"70232589","displayToPublicDate":"1975-05-01T11:35:38","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"The influence of late Cenozoic stratigraphy on distribution of impoundment-related seismicity at Lake Mead, Nevada-Arizona","docAbstract":"At Lake Mead, contrasts in permeability of upper Cenozoic sediments show a better correlation with irregularly distributed impoundment-related seismicity than do contrasts in structure. An evaluation of structures developed during the late Cenozoic fails to explain the erratic distribution of seismicity. An evaluation of the late Cenozoic stratigraphy, however, shows a concentration of relatively impermeable evaporite beds and fine-grained clastic strata in the less seismic part of the lake basin; therefore, the authors conclude that a hydraulic connection between the lake water and the deep aquifer system that includes buried faults is needed in the Lake Mead area to cause the release of seismic energy. Where hydraulic connection is prevented by continuous or quasi-continuous upper Cenozoic basin-fill strata of low permeability, as in the eastern basin area, seismicity does not occur.
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Ernest","contributorId":104484,"corporation":false,"usgs":true,"family":"Anderson","given":"R.","email":"","middleInitial":"Ernest","affiliations":[],"preferred":false,"id":846020,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Laney, R. L.","contributorId":83889,"corporation":false,"usgs":true,"family":"Laney","given":"R. 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All four tephra sets are less than about 18,000 yr old. The oldest set described (set S) is between about 18,000 and 12,000 yr old; the most extensive pumice layers of the set, however, probably are no more than about 13,000 yr old. Relatively voluminous layers in the next younger tephra unit (set J) probably range from slightly less than 12,000 to slightly more than 8,000 yr old; in the overlying set Y, the most extensive layers range from about 4,000 to 3,400 yr old. The largest tephra layers in the youngest tephra set described, set W, are apparently all about 450 yr old. All the extensive tephra deposits were carried chiefly east of Mount St. Helens, and the bulk of them form an arc which extends from north-northeast of the volcano clockwise around to the southeast.
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Geological Survey","usgsCitation":"Mullineaux, D., Hyde, J.H., and Rubin, M., 1975, Widespread late glacial and postglacial tephra deposits from Mount St. Helens Volcano, Washington: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 329-335.","productDescription":"7 p.","startPage":"329","endPage":"335","costCenters":[],"links":[{"id":403181,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403180,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Washington","otherGeospatial":"Mount St. Helens","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -122.19612121582031,\n 46.14939437647686\n ],\n [\n -122.15595245361328,\n 46.152724137540936\n ],\n [\n -122.14393615722655,\n 46.162712212065664\n ],\n [\n -122.1291732788086,\n 46.17436267427271\n ],\n [\n -122.14187622070311,\n 46.190764243215256\n ],\n [\n -122.1411895751953,\n 46.20834889395228\n ],\n [\n -122.14977264404295,\n 46.21642644120982\n ],\n [\n -122.1617889404297,\n 46.227115485868595\n ],\n [\n -122.1786117553711,\n 46.238752301105684\n ],\n [\n -122.18547821044923,\n 46.23732751752229\n ],\n [\n -122.20779418945311,\n 46.244451065485094\n ],\n [\n -122.23217010498048,\n 46.248724750319965\n ],\n [\n -122.24658966064452,\n 46.23732751752229\n ],\n [\n -122.25173950195311,\n 46.228778039111894\n ],\n [\n -122.25173950195311,\n 46.221652456379104\n ],\n [\n -122.25963592529295,\n 46.2114375081839\n ],\n [\n -122.27130889892578,\n 46.207873707116555\n ],\n [\n -122.24658966064452,\n 46.18363372751015\n ],\n [\n -122.25036621093749,\n 46.17032095673059\n ],\n [\n -122.24040985107422,\n 46.162712212065664\n ],\n [\n -122.23079681396483,\n 46.16413893185584\n ],\n [\n -122.22118377685547,\n 46.16199883829574\n ],\n [\n -122.19612121582031,\n 46.14939437647686\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Mullineaux, Donal R.","contributorId":98371,"corporation":false,"usgs":true,"family":"Mullineaux","given":"Donal R.","affiliations":[],"preferred":false,"id":846017,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hyde, Jack H.","contributorId":27441,"corporation":false,"usgs":true,"family":"Hyde","given":"Jack","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":846018,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Rubin, Meyer","contributorId":107283,"corporation":false,"usgs":true,"family":"Rubin","given":"Meyer","email":"","affiliations":[],"preferred":false,"id":846019,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70232587,"text":"70232587 - 1975 - Geology, geochemistry, and fluid-inclusion petrography of the Sapo Alegre porphyry copper prospect and its metavolcanic wallrocks, west-central Puerto Rico","interactions":[],"lastModifiedDate":"2022-07-07T16:24:31.352711","indexId":"70232587","displayToPublicDate":"1975-05-01T11:02:53","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Geology, geochemistry, and fluid-inclusion petrography of the Sapo Alegre porphyry copper prospect and its metavolcanic wallrocks, west-central Puerto Rico","docAbstract":"The Sapo Alegre prospect, a small porphyry copper-molybdenum occurrence in west-central Puerto Rico, is characterized by distinct zones of alteration and mineralization of quartz diorite porphyry. A biotite-chlorite zone in the porphyry near its contact with surrounding metavolcanic rocks contains copper, molybdenum, gold, silver, selenium, and tellurium. A quartz-sericite-pyrite zone within the porphyry contains abundant sulfur and traces of selenium, but metals of the biotite-chlorite zone are nearly absent and zinc, manganese, nickel, sodium, calcium, and magnesium contents are very low. Quartz grains in the biotite-chlorite zone contain abundant fluid inclusions in which halite crystals are common, whereas in the quartz-sericite-pyrite zone inclusions are less abundant and rarely contain halite inclusions. Metavolcanic rocks northwest of the mineralized porphyry are altered to amphibolitic hornfels near the contact. Biotitic alteration is strong outward from the hornfels and grades into chlorite alteration. The hornfels has very low sulfide content, and the biotite zone has moderate amounts of copper and sulfur, decreasing outward. The chlorite zone is characterized by an abrupt increase in zinc and manganese content. Fluid-inclusion data suggest temperatures between 300° and 400°C for hydrothermal fluids in the biotite-chlorite zone of the porphyry and 250° to 300°C for fluids in the quartz-sericite-pyrite zone. Pressures equivalent to about 1.5 km of burial are indicated.
","language":"English","publisher":"U. S. Geological Survey","usgsCitation":"Cox, D.P., Gonzalez, I.P., and Nash, J.T., 1975, Geology, geochemistry, and fluid-inclusion petrography of the Sapo Alegre porphyry copper prospect and its metavolcanic wallrocks, west-central Puerto Rico: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 313-327.","productDescription":"15 p.","startPage":"313","endPage":"327","costCenters":[],"links":[{"id":403179,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403178,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"country":"Puerto Rico","county":"Río Víví district","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -66.79069519042969,\n 18.107513406005165\n ],\n [\n -66.65164947509766,\n 18.107513406005165\n ],\n [\n -66.65164947509766,\n 18.215981050868315\n ],\n [\n -66.79069519042969,\n 18.215981050868315\n ],\n [\n -66.79069519042969,\n 18.107513406005165\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Cox, Dennis P. dcox@usgs.gov","contributorId":2766,"corporation":false,"usgs":true,"family":"Cox","given":"Dennis","email":"dcox@usgs.gov","middleInitial":"P.","affiliations":[],"preferred":true,"id":846014,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gonzalez, Ileana Perez","contributorId":292878,"corporation":false,"usgs":false,"family":"Gonzalez","given":"Ileana","email":"","middleInitial":"Perez","affiliations":[],"preferred":false,"id":846015,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nash, J. Thomas","contributorId":26306,"corporation":false,"usgs":true,"family":"Nash","given":"J.","email":"","middleInitial":"Thomas","affiliations":[],"preferred":false,"id":846016,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70232541,"text":"70232541 - 1975 - Applications of remote sensing to structural interpretations in the southern Appalachians","interactions":[],"lastModifiedDate":"2022-07-06T16:42:01.466852","indexId":"70232541","displayToPublicDate":"1975-05-01T11:01:46","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2446,"text":"Journal of Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"Applications of remote sensing to structural interpretations in the southern Appalachians","docAbstract":"Remote sensing is the technology of studying distant objects by measuring and recording energy from one or more segments of the electromagnetic spectrum. Imaging sensors which operate from medium- and high-altitude aircraft or from spacecraft can provide a synoptic view of large areas and of surface phenomena not evident in the field. Image-acquiring systems and instruments have been designed to partially automate data collection and to reduce the time devoted to analysis, information extraction, and detection of changes of surface phenomena. Among these phenomena are the surface distribution of heat, moisture, snow, water, vegetation, and cultural features. When coupled with ancillary data, including field surveys, sensor data provide useful information for the recognition and mapping of regional structure, jointing patterns, drainage patterns, fault and fracture traces, and rock types. The recognition of several major linear surface features, two of which proved to be traces of previously unrecognized faults (the Canebrake and the Coeburn faults) in the Appalachian Plateaus, demonstrates the pragmatic application of aircraft and spacecraft remote sensing to geological investigations in the Appalachians.
Disseminated uraninite occurs in Wheeler Basin, Grand County, Colo., about 5 mi (8 km) southeast of Monarch Lake, in Precambrian metamorphic rocks consisting of migmatized gneiss and mixed gneiss and pegmatite. An intrusion of Precambrian Y Silver Plume Granite lies within 400 ft (122 m) of the occurrence. The disseminated uraninite is confined to parts of the host rock that are rich in biotite; highest grade found was 0.73 percent uranium. The disseminated uraninite occurs as cubes and grains, generally from 0.1 to 0.3 mm across. Unit cell edge of the uraninite, ≈5.48 A, suggests its pegmatitic origin. The origin of the uraninite disseminations is attributed by us to remobilization and concentration of elements during metamorphism caused by the intrusion of Silver Plume Granite. Uranium and lead isotopic analyses by K. R. Ludwig of uraninite and monazite from biotite concentrations confirm an apparent age of 1,450±20 m.y. for these minerals. This age is equivalent to that reported for the Silver Plume Granite. Although the Wheeler Basin occurrence is small in size, it has many similarities to the Rossing uranium deposit in South-West Africa.
","language":"English","publisher":"U. S. Geological Survey","usgsCitation":"Young, E.J., and Hauff, P.L., 1975, An occurrence of disseminated uraninite in Wheeler Basin, Grand County, Colorado: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 305-311.","productDescription":"7 p.","startPage":"305","endPage":"311","costCenters":[],"links":[{"id":403176,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403165,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue3/report.pdf","size":"22359 KB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Colorado","county":"Grand County","otherGeospatial":"Wheeler Basin","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -105.71044921875,\n 39.98514382939949\n ],\n [\n -105.56144714355469,\n 39.98514382939949\n ],\n [\n -105.56144714355469,\n 40.06506655864912\n ],\n [\n -105.71044921875,\n 40.06506655864912\n ],\n [\n -105.71044921875,\n 39.98514382939949\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Young, E. J.","contributorId":82316,"corporation":false,"usgs":true,"family":"Young","given":"E.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":846005,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hauff, P. L.","contributorId":95470,"corporation":false,"usgs":true,"family":"Hauff","given":"P.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":846006,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70176362,"text":"70176362 - 1975 - The study of fresh-water lake ice using multiplexed imaging radar","interactions":[],"lastModifiedDate":"2025-02-07T16:37:25.259929","indexId":"70176362","displayToPublicDate":"1975-04-04T00:00:00","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2328,"text":"Journal of Glaciology","active":true,"publicationSubtype":{"id":10}},"title":"The study of fresh-water lake ice using multiplexed imaging radar","docAbstract":"The study of ice in the upper Great Lakes, both from the operational and the scientific points of view, is receiving continued attention. Quantitative and qualitative field work is being conducted to provide the needed background for accurate interpretation of remotely sensed data. The data under discussion in this paper were obtained by a side-looking multiplexed airborne radar (SLAR) supplemented with ground-truth data.
Because of its ability to penetrate adverse weather, radar is an especially important instrument for monitoring ice in the upper Great Lakes. It has previously been shown that imaging radars can provide maps of ice cover in these areas. However, questions concerning both the nature of the surfaces reflecting radar energy and the interpretation of the radar imagery continually arise.
Our analysis of ice in Whitefish Bay (Lake Superior) indicates that the combination of the ice/water interlace and the ice/air interface is the major contributor to the radar backscatter as seen on the imagery At these frequencies the ice has a very low relative dielectric permittivity (< 3.0) and a low loss tangent Thus, this ice is somewhat transparent to the energy used by the imaging SLAR system. The ice types studied include newly formed black ice, pancake ice, and frozen and consolidated pack and brash ice.
Although ice thickness cannot be measured directly from the received signals, it is suspected that by combining the information pertaining to radar backscatter with data on the meteorological and sea-state history of the area, together with some basic ground truth, better estimates of the ice thickness may be provided. In addition, certain ice features (e.g. ridges, ice-foot formation, areas of brash ice) may be identified with reasonable confidence. There is a continued need for additional ground work to verify the validity of imaging radars for these types of interpretations.
Base and precious metal ores valued in excess of $300 million have been mined from vein, pipe, and replacement deposits located on the northwest side of, and structurally related to, the middle Tertiary Silverton caldera. A belt of normal faults radial to the caldera contains veins which have been mined for as much as 15,000 feet (4,600 m) along strike and 3,700 feet (1,100 m) downdip. Structural relations, metal distributions, and fluid inclusion data suggest that many of the veins were open at the same general time and received the same mineralization.
Fluid inclusions in quartz and sphalerite of the main ore stage of the Argentine and adjoining veins have filling temperatures ranging from 315 degrees to 249 degrees C and salinities from 7.9 to 0.1 wt percent NaCl equivalent. However, the majority of inclusions from base metal and gold stages are in a relatively narrow range near 280 degrees to 290 degrees C and salinities are unusually low (less than 2 wt %). Filling temperatures in postsulfide quartz and fluorite are as low as 153 degrees C and salinities are generally less than 0.5 wt percent. A pressure correction of about +25 degrees C should be added to the filling temperatures. Ore fluids were physically homogeneous liquids over the 3,700-foot (1,100 m) vertical and 11,200-foot (3,400 m) lateral range studied and no systematic variations in filling temperatures or salinity in this space are noted, but significant fluctuations are evident locally.
Recently developed base metal replacement deposits occur in the Eocene Telluride Conglomerate adjacent to many metal-bearing veins. Calc-silicate alteration of the conglomerate host was probably by moderately saline fluids that ranged in temperature from 320 degrees to about 400 degrees C. Quartz-bearing clasts in altered zones contain secondary halitebearing inclusions with filling temperatures of about 250 degrees C and salinities about 34 wt percent; such inclusions are not known from the base metal stage and are interpreted to have been preore. Hydrothermal quartz, sphalerite, and calcite from replacement pods contain inclusions with filling temperatures ranging from 204 degrees to 309 degrees C and salinities from 11.2 to 0.2 wt percent. That the replacement zones and throughgoing veins are genetically related is suggested by the similarity of filling temperatures and compositions of base metal-stage fluid inclusions and by structural evidence.
Small high-grade pipe deposits of base and precious metals occur along the ring-fault zone of the Silverton caldera. Filling temperatures for inclusions in quartz, sphalerite, and barite of the main ore stage of these deposits range from 216 degrees to 308 degrees C and salinities range from 1.6 to 0.2 wt percent NaCl. Quartz in altered wall rocks and silicified capping contains moderately saline secondary inclusions with relatively uniform liquid: vapor ratios that suggest filling temperatures of about 225 degrees to 300 degrees C. From the available samples there is no fluid inclusion evidence for boiling. Throttling, which had been hypothesized to explain the telescoped nature of the pipe ores, is neither substantiated nor discredited by the inclusion data.
","language":"English","publisher":"GeoScienceWorld","doi":"10.2113/gsecongeo.70.8.1448","usgsCitation":"Nash, J.T., 1975, Fluid inclusion studies of vein, pipe, and replacement deposits, northwestern San Juan Mountains, Colorado: Economic Geology, v. 70, no. 8, p. 1448-1462, https://doi.org/10.2113/gsecongeo.70.8.1448.","productDescription":"15 p.","startPage":"1448","endPage":"1462","costCenters":[],"links":[{"id":372910,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado","otherGeospatial":"Northwesterns San Juan Mountains ","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -108.39660644531249,\n 37.38325280195101\n ],\n [\n -107.545166015625,\n 37.38325280195101\n ],\n [\n -107.545166015625,\n 38.28131307922966\n ],\n [\n -108.39660644531249,\n 38.28131307922966\n ],\n [\n -108.39660644531249,\n 37.38325280195101\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"70","issue":"8","noUsgsAuthors":false,"publicationDate":"1975-12-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Nash, J. Thomas","contributorId":26306,"corporation":false,"usgs":true,"family":"Nash","given":"J.","email":"","middleInitial":"Thomas","affiliations":[],"preferred":false,"id":783873,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70208897,"text":"70208897 - 1975 - Geochemical studies in the Park City district; II, Sulfide mineralogy and minor-element chemistry, Mayflower mine","interactions":[],"lastModifiedDate":"2020-03-04T13:31:22","indexId":"70208897","displayToPublicDate":"1975-03-04T13:16:25","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Geochemical studies in the Park City district; II, Sulfide mineralogy and minor-element chemistry, Mayflower mine","docAbstract":"Fissure-filling and replacement Pb-Zn-Cu-Au-Ag ores of the Mayflower mine occur in calcareous sedimentary and intrusive wall rocks over a vertical interval of 3,000 feet. The ores are exceptional in the district for their chalcopyrite and gold content and for the unusual associated gangue minerals anhydrite, chlorite, and hematite. High oxygen fugacities are indicated for many stages of mineralization. Sphalerite compositions are highly variable in the range 0.09 to 5.9 weight percent Fe, an indication of large fluctuations in sulfur fugacity. Silver is carried in tetrahedrite-tennantite (0.2 to 16 wt %), enargite (0.5 to 0.8 wt %), in coupled substitution with Bi + Sb in galena (0.02 to 2.9 wt %), and in the minerals argentite, matildite, chalcocite, and bornite. Content of As, Se, Te, and other minor elements is small. Fractionation of Cd between sphalerite and coexisting galena is relatively consistent whereas the fractionation of Mn between sphalerite and galena is variable; calculated temperatures of formation are high and unreliable.
","language":"English","publisher":"GeoScienceWorld","doi":"10.2113/gsecongeo.70.6.1038","usgsCitation":"Nash, J.T., 1975, Geochemical studies in the Park City district; II, Sulfide mineralogy and minor-element chemistry, Mayflower mine: Economic Geology, v. 70, no. 6, p. 1038-1049, https://doi.org/10.2113/gsecongeo.70.6.1038.","productDescription":"12 p.","startPage":"1038","endPage":"1049","costCenters":[],"links":[{"id":372907,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"70","issue":"6","noUsgsAuthors":false,"publicationDate":"1975-10-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Nash, J. Thomas","contributorId":26306,"corporation":false,"usgs":true,"family":"Nash","given":"J.","email":"","middleInitial":"Thomas","affiliations":[],"preferred":false,"id":783872,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":25279,"text":"ofr100237 - 1975 - Index of flood maps for California prepared by the U.S. Geological Survey through 1974","interactions":[],"lastModifiedDate":"2014-07-08T16:17:47","indexId":"ofr100237","displayToPublicDate":"1975-03-01T16:15:27","publicationYear":"1975","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"1002-37","title":"Index of flood maps for California prepared by the U.S. Geological Survey through 1974","docAbstract":"No abstract available.","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr100237","issn":"0364-7064","usgsCitation":"Crippen, J.R., 1975, Index of flood maps for California prepared by the U.S. Geological Survey through 1974: U.S. Geological Survey Open-File Report 1002-37, 29 p., https://doi.org/10.3133/ofr100237.","productDescription":"29 p.","numberOfPages":"29","costCenters":[],"links":[{"id":289572,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"country":"United States","state":"California","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -124.41,32.53 ], [ -124.41,42.01 ], [ -114.13,42.01 ], [ -114.13,32.53 ], [ -124.41,32.53 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53bd12ece4b00cbf31f7234f","contributors":{"authors":[{"text":"Crippen, John R.","contributorId":13208,"corporation":false,"usgs":true,"family":"Crippen","given":"John","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":193366,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70207457,"text":"70207457 - 1975 - Sources of suspended matter in waters of the Middle Atlantic Bight","interactions":[],"lastModifiedDate":"2019-12-19T15:25:01","indexId":"70207457","displayToPublicDate":"1975-03-01T15:18:32","publicationYear":"1975","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2451,"text":"Journal of Sedimentary Research","onlineIssn":"1938-3681","printIssn":"1527-1404","active":true,"publicationSubtype":{"id":10}},"title":"Sources of suspended matter in waters of the Middle Atlantic Bight","docAbstract":"Suspended matter collected in the Middle Atlantic Bight (the coastal segment of the United States between Cape Cod and Cape Hatteras) in September 1969 was predominantly organic: an average of 80% combustible organic matter in surface waters and 40)% near bottom. Total suspended concentrations decreased between the inner shelf and the shelf break by an order of magnitude in both near-surface and near-bottom waters. The noncombustible (ash) fraction of the suspended matter decreased over the same distance by one order of magnitude in the near-bottom waters and two orders of magnitude in surface waters. Recently contributed river sediment is not a significant constituent of the suspended matter in the waters of the shelf, particularly the outer shelf. Most of the inorganic material in suspension represents resuspended bottom sediments (at least some of which are relict) whose suspended concentrations are increased noticeably by storms.
","language":"English","publisher":"American Geological Institute","doi":"10.1306/212F6CFD-2B24-11D7-8648000102C1865D","usgsCitation":"Meade, R.H., Sachs, P.L., Manheim, F.T., Hathaway, J., and Spencer, D., 1975, Sources of suspended matter in waters of the Middle Atlantic Bight: Journal of Sedimentary Research, v. 78, no. 4, p. 171-188, https://doi.org/10.1306/212F6CFD-2B24-11D7-8648000102C1865D.","productDescription":"18 p.","startPage":"171","endPage":"188","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":370515,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"Mid-Atlantic Bight","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -70.0048828125,\n 41.60722821271717\n ],\n [\n -71.91650390625,\n 41.27780646738183\n ],\n [\n -73.54248046875,\n 40.56389453066509\n ],\n [\n -73.93798828125,\n 40.43022363450862\n ],\n [\n -74.86083984375,\n 38.90813299596705\n ],\n [\n -75.89355468749999,\n 37.10776507118514\n ],\n [\n -75.60791015625,\n 35.62158189955968\n ],\n [\n -76.2451171875,\n 34.95799531086792\n ],\n [\n -75.34423828125,\n 34.08906131584994\n ],\n [\n -72.88330078125,\n 33.925129700072\n ],\n [\n -69.67529296875,\n 38.87392853923629\n ],\n [\n -68.88427734374999,\n 41.47566020027821\n ],\n [\n -70.0048828125,\n 41.60722821271717\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"78","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Meade, Robert H. 0000-0002-4965-3040 rhmeade@usgs.gov","orcid":"https://orcid.org/0000-0002-4965-3040","contributorId":2744,"corporation":false,"usgs":true,"family":"Meade","given":"Robert","email":"rhmeade@usgs.gov","middleInitial":"H.","affiliations":[{"id":5044,"text":"National Research Program - Central Branch","active":true,"usgs":true}],"preferred":true,"id":778119,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sachs, Peter L.","contributorId":221422,"corporation":false,"usgs":false,"family":"Sachs","given":"Peter","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":778120,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Manheim, Frank T. 0000-0003-4005-4524","orcid":"https://orcid.org/0000-0003-4005-4524","contributorId":20770,"corporation":false,"usgs":true,"family":"Manheim","given":"Frank","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":778121,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Hathaway, J.C.","contributorId":94280,"corporation":false,"usgs":true,"family":"Hathaway","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":778122,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Spencer, Derek","contributorId":221423,"corporation":false,"usgs":false,"family":"Spencer","given":"Derek","email":"","affiliations":[],"preferred":false,"id":778123,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ]}