{"pageNumber":"6119","pageRowStart":"152950","pageSize":"25","recordCount":184938,"records":[{"id":70232778,"text":"70232778 - 1975 - Ion-selective electrode determination of iodine in rocks and soils","interactions":[],"lastModifiedDate":"2022-07-12T15:53:16.190487","indexId":"70232778","displayToPublicDate":"1975-11-01T10:51:13","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":"Ion-selective electrode determination of iodine in rocks and soils","docAbstract":"

Use of an iodide-ion-selective electrode permits rapid and fairly accurate determination of iodine (as iodide) in rocks and soils. When a 1-g sample is used, concentrations as small as 0.5 ppm can be determined with a precision of about 25-percent relative standard deviation. When bromine concentration is greater than 5 ppm, the same method can be used for bromine determination. The procedure merits further investigation as a possible tool in geochemical prospecting.

","language":"English","publisher":"U.S. Geological Survey","usgsCitation":"Ficklin, W.H., 1975, Ion-selective electrode determination of iodine in rocks and soils: Journal of Research of the U.S. Geological Survey, v. 3, no. 6, p. 753-755.","productDescription":"3 p.","startPage":"753","endPage":"755","costCenters":[],"links":[{"id":403513,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403512,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue6/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"volume":"3","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Ficklin, W. H.","contributorId":89517,"corporation":false,"usgs":true,"family":"Ficklin","given":"W.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":846401,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70232774,"text":"70232774 - 1975 - Absolute age of disseminated uraninite in Wheeler Basin, Grand County, Colorado","interactions":[],"lastModifiedDate":"2022-07-12T15:50:32.904345","indexId":"70232774","displayToPublicDate":"1975-11-01T10:43:07","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":"Absolute age of disseminated uraninite in Wheeler Basin, Grand County, Colorado","docAbstract":"

Uranium and lead isotopic analyses of monazlte and uraninite from the disseminated uraninite occurrence at Wheeler Basin, Grand County, Colo., indicate that these minerals formed 1,446±20 m.y. ago. This time correlates well with intrusion of the Silver Plume Granite. The uraninite and monazite were also affected by a later disturbance at 880±130 m.y., but show essentially no effects of subsequent events. This secondary disturbance may have been due to intrusion of dikes related to the Pikes Peak batholith, dated at 1,041±13 m.y. ago.

","language":"English","publisher":"U.S. Geological Survey","usgsCitation":"Ludwig, K., and Young, E.J., 1975, Absolute age of disseminated uraninite in Wheeler Basin, Grand County, Colorado: Journal of Research of the U.S. Geological Survey, v. 3, no. 6, p. 747-751.","productDescription":"5 p.","startPage":"747","endPage":"751","costCenters":[{"id":218,"text":"Denver Federal Center","active":false,"usgs":true}],"links":[{"id":403511,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403509,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue6/report.pdf","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 -105.68058013916016,\n 40.03339786241084\n ],\n [\n -105.6364631652832,\n 40.03339786241084\n ],\n [\n -105.6364631652832,\n 40.06651166669528\n ],\n [\n -105.68058013916016,\n 40.06651166669528\n ],\n [\n -105.68058013916016,\n 40.03339786241084\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Ludwig, K.R.","contributorId":97112,"corporation":false,"usgs":true,"family":"Ludwig","given":"K.R.","email":"","affiliations":[{"id":218,"text":"Denver Federal Center","active":false,"usgs":true}],"preferred":false,"id":846397,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Young, E. J.","contributorId":82316,"corporation":false,"usgs":true,"family":"Young","given":"E.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":846398,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70232772,"text":"70232772 - 1975 - A late Holocene pollen diagram from near Lake Tahoe, El Dorado County, California","interactions":[],"lastModifiedDate":"2022-07-12T15:39:05.026689","indexId":"70232772","displayToPublicDate":"1975-11-01T10:32:48","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 late Holocene pollen diagram from near Lake Tahoe, El Dorado County, California","docAbstract":"

A 2,500-yr pollen record from an alpine meadow in the central Sierra Nevada shows a general agreement with other more detailed pollen records from the late Holocene of California. Tree roots from the site suggest dry conditions at about 1150 and 1350 radiocarbon yr B.P.

","language":"English","publisher":"U.S. Geological Survey","usgsCitation":"Sercelj, A., and Adam, D.P., 1975, A late Holocene pollen diagram from near Lake Tahoe, El Dorado County, California: Journal of Research of the U.S. Geological Survey, v. 3, no. 6, p. 737-745.","productDescription":"9 p.","startPage":"737","endPage":"745","costCenters":[],"links":[{"id":403508,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403506,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue6/report.pdf"}],"country":"United States","state":"California","county":"El Dorado County","otherGeospatial":"Lake Tahoe","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -120.17944335937499,\n 38.79690830348427\n ],\n [\n -120.0094985961914,\n 38.79690830348427\n ],\n [\n -120.0094985961914,\n 38.89343778664929\n ],\n [\n -120.17944335937499,\n 38.89343778664929\n ],\n [\n -120.17944335937499,\n 38.79690830348427\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Sercelj, Alojz","contributorId":293006,"corporation":false,"usgs":false,"family":"Sercelj","given":"Alojz","email":"","affiliations":[],"preferred":false,"id":846395,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Adam, David P.","contributorId":36132,"corporation":false,"usgs":true,"family":"Adam","given":"David","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":846396,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70232771,"text":"70232771 - 1975 - Modern pollen surface samples: An analysis of subsamples","interactions":[],"lastModifiedDate":"2022-07-12T15:31:58.928629","indexId":"70232771","displayToPublicDate":"1975-11-01T10:29:36","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":"Modern pollen surface samples: An analysis of subsamples","docAbstract":"

Multiple subsamples of pollen samples obtained from the modern soil surface at two sites in southern Arizona were individually collected and analyzed to evaluate the practice of mixing subsamples when collecting modern surface samples. Results suggest that at least five subsamples must be mixed in order to avoid collecting a sample that is not representative of the local pollen rain.

","language":"English","publisher":"U.S. Geological Survey","usgsCitation":"Adam, D.P., and Mehringer, P.J., 1975, Modern pollen surface samples: An analysis of subsamples: Journal of Research of the U.S. Geological Survey, v. 3, no. 6, p. 733-736.","productDescription":"4 p.","startPage":"733","endPage":"736","costCenters":[],"links":[{"id":403505,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403504,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue6/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"volume":"3","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Adam, David P.","contributorId":36132,"corporation":false,"usgs":true,"family":"Adam","given":"David","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":846393,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Mehringer, Peter J.","contributorId":79470,"corporation":false,"usgs":true,"family":"Mehringer","given":"Peter","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":846394,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70232767,"text":"70232767 - 1975 - A late Holocene pollen record from Pearson's Pond, Weeks Creek landslide, San Francisco Peninsula, California","interactions":[],"lastModifiedDate":"2022-07-12T15:28:31.504358","indexId":"70232767","displayToPublicDate":"1975-11-01T10:21:16","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 late Holocene pollen record from Pearson's Pond, Weeks Creek landslide, San Francisco Peninsula, California","docAbstract":"

A 210-cm core from Pearson's Pond yielded a pollen record for the past 3 millenia. Prior to A.D. 1000 the pond biota was particularly sensitive to climatic fluctuations. Two wet intervals occur in the pollen record, between 350 B.C. and A.I). 0 and between A.D. 650 and 900. The pollen record suggests that the Weeks Creek landslide may have moved at least twice prior to 3,000 years ago and that the middle part of the glide has been stable since that time. Seasonal changes produce large annual fluctuations in the water table, and climatic changes during the past 3,000 years have produced significant changes in the timing and magnitude of the annual changes. Climatic records such as the one presented here will help us to understand and separate the effects of climate and earthquakes on the landslide history of the Holocene deposits of the San Francisco Bay area.

","language":"English","publisher":"U.S. Geological Survey","usgsCitation":"U.S. Geological Survey, 1975, A late Holocene pollen record from Pearson's Pond, Weeks Creek landslide, San Francisco Peninsula, California: Journal of Research of the U.S. Geological Survey, v. 3, no. 6, p. 721-731.","productDescription":"11 p.","startPage":"721","endPage":"731","costCenters":[],"links":[{"id":403503,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403501,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue6/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"California","otherGeospatial":"Pearson's Pond, San Francisco Peninisula","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -122.2779607772827,\n 37.326300920153855\n ],\n [\n -122.27650165557861,\n 37.326300920153855\n ],\n [\n -122.27650165557861,\n 37.32754651163429\n ],\n [\n -122.2779607772827,\n 37.32754651163429\n ],\n [\n -122.2779607772827,\n 37.326300920153855\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW"} ,{"id":70232766,"text":"70232766 - 1975 - Stratigraphy, conodont dating, and paleotectonic interpretation of the type Milligen Formation (Devonian), Wood River area, Idaho","interactions":[],"lastModifiedDate":"2022-07-12T15:20:01.706831","indexId":"70232766","displayToPublicDate":"1975-11-01T10:10:55","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":"Stratigraphy, conodont dating, and paleotectonic interpretation of the type Milligen Formation (Devonian), Wood River area, Idaho","docAbstract":"

The Milligen Formation at and near its type locality in the Wood River area is considerably older than and unrelated to rocks of Early Mississippian age called Milligen Formation in the Lost River Range and other ranges of east-central Idaho. Conodont faunas were found in limestones of a thin upper member of the sparsely fossiliferous marine Milligen Formation in its principal reference section at Milligen Gulch, at Fisher Canyon, and near Bellevue, Idaho. The faunas include indigenous conodonts here assigned to the early Late Devonian (early Frasnian) Lower and Middle Polygnathus asymmetricus Zones, and reworked conodonts derived from several Middle and Early Devonian conodont zones. An underlying much thicker argillite member of the Milligen contains fewer limestones, but a thin encrinite interbed near the middle of the member yielded early Middle Devonian (Eifelian) conodonts. This lower member probably represents most of Middle and Early Devonian time. Although its base is nowhere exposed in the Wood River area, the Milligen is inferred to have been deposited on the Silurian Trail Creek Formation, which crops out just to the east in the Pioneer Mountains. The age of the Milligen is therefore wholly Devonian and the highest fossiliferous beds are no younger than early Late Devonian. Reworked Middle and Early Devonian conodonts in limestone turbidites of the upper member of the Milligen Formation are identical to conodonts found in shelf (miogeosynclinal) carbonate rocks farther east. A postulated eastern source for the turbidites is supported by new data on the distribution, thickness, and tectonic facies of Devonian rocks that suggest the presence of a Late Devonian ridge on the continental shelf east of the Milligen depositional area. The Milligen Formation was intensely folded and was emergent during most of the Mississippian time when it formed part of the Antler Highlands, which shed flysch sediments eastward into the Copper basin. The Wood River Formation of Pennsylvanian and Permian age was then deposited over a subdued topography on the Milligen Formation. The Hailey Conglomerate Member at the base of the Wood River filled many irregularities in the surface. This depositional contact later was largely destroyed and the contact between the Milligen and Wood River is now a regional thrust fault at most places.

","language":"English","publisher":"U.S. Geological Survey","usgsCitation":"Sandberg, C., Hall, W.E., Batchelder, J.N., and Axelsen, C., 1975, Stratigraphy, conodont dating, and paleotectonic interpretation of the type Milligen Formation (Devonian), Wood River area, Idaho: Journal of Research of the U.S. Geological Survey, v. 3, no. 6, p. 707-720.","productDescription":"14 p.","startPage":"707","endPage":"720","costCenters":[{"id":35995,"text":"Geology, Geophysics, and Geochemistry Science Center","active":true,"usgs":true}],"links":[{"id":403500,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403499,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue6/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Idaho","otherGeospatial":"Wood River area","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -114.41162109375,\n 43.38608793041562\n ],\n [\n -113.94882202148438,\n 43.38608793041562\n ],\n [\n -113.94882202148438,\n 43.71057158566884\n ],\n [\n -114.41162109375,\n 43.71057158566884\n ],\n [\n -114.41162109375,\n 43.38608793041562\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Sandberg, Charles sandberg@usgs.gov","contributorId":199124,"corporation":false,"usgs":true,"family":"Sandberg","given":"Charles","email":"sandberg@usgs.gov","affiliations":[{"id":35995,"text":"Geology, Geophysics, and Geochemistry Science Center","active":true,"usgs":true}],"preferred":true,"id":846387,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hall, Wayne E.","contributorId":89955,"corporation":false,"usgs":true,"family":"Hall","given":"Wayne","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":846388,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Batchelder, John N.","contributorId":103729,"corporation":false,"usgs":true,"family":"Batchelder","given":"John","email":"","middleInitial":"N.","affiliations":[],"preferred":false,"id":846389,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Axelsen, Claus","contributorId":293001,"corporation":false,"usgs":false,"family":"Axelsen","given":"Claus","email":"","affiliations":[],"preferred":false,"id":846390,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70232762,"text":"70232762 - 1975 - Silurian and Devonian miogeosynclinal and transitional rocks of the Fish Creek Reservoir window, central Idaho","interactions":[],"lastModifiedDate":"2022-07-12T15:09:57.608313","indexId":"70232762","displayToPublicDate":"1975-11-01T10:00:54","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":"Silurian and Devonian miogeosynclinal and transitional rocks of the Fish Creek Reservoir window, central Idaho","docAbstract":"

Documentation of Devonian continental-shelf shallow-water carbonate rocks in the core of the Fish Creek Reservoir window shifts the known westernmost limit of the Devonian miogeosyncline 50 km (30 mi) southwest across the structural grain from the well-known miogeosynclinal sequence in the Lost River Range. The miogeosynclinal carbonate sequence in the window has a minimum thickness of 450 m (1,500 ft). It comprises the upper Lower Devonian (Emsian) and lower Middle Devonian (Eifelian) Carey Dolomite (new), the upper Middle Devonian (Givetian) and Upper Devonian Jefferson Formation, and the Upper Devonian Picabo Formation (new). Conodont faunas precisely date the Carey. The Picabo Formation, composed of interbedded sandy dolomite-pebble conglomerate and dolomitic quartzose sandstone, is unlike any previously described formation of Late Devonian or Early Mississippian age in central Idaho. It resembles parts of the Stansbury, Beirdneau, Leatham, and Victoria Formations, which reflect areas of local Late Devonian uplift and erosion of older shelf rocks in northern Utah and southeastern Idaho. Transitional (continental-slope) rocks of the Roberts Mountains Formation representing reef and offreef facies are thrust over the Devonian shelf sequence within the Fish Creek Reservoir window. The Roberts Mountains Formation here is precisely dated as latest Silurian (Pridolian, eosteinhornensis Zone) through earliest Devonian (Lochkovian) by a sequence of conodont faunas. The easternmost known exposures of possible Devonian siliceous facies rocks assigned to the Milligen(?) Formation are present less than 4.8 km (3 mi) southwest of the shelf sequence. Structural relations and paleotectonic reconstructions suggest that they have a minimum eastward translation of 32 km (20 mi). The Devonian continent-ocean basin interface, along which the Antler orogenic belt developed at this latitude, probably was located near the east edge of the present Idaho batholith.

","language":"English","publisher":"U.S. Geological Survey","usgsCitation":"Skipp, B.A., and Sandberg, C., 1975, Silurian and Devonian miogeosynclinal and transitional rocks of the Fish Creek Reservoir window, central Idaho: Journal of Research of the U.S. Geological Survey, v. 3, no. 6, p. 691-706.","productDescription":"16 p.","startPage":"691","endPage":"706","costCenters":[{"id":35995,"text":"Geology, Geophysics, and Geochemistry Science Center","active":true,"usgs":true}],"links":[{"id":403498,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403497,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue6/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Idaho","otherGeospatial":"Fish Creek Reservoir window","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -113.86642456054688,\n 43.40118121755815\n ],\n [\n -113.79707336425781,\n 43.40118121755815\n ],\n [\n -113.79707336425781,\n 43.461641371770504\n ],\n [\n -113.86642456054688,\n 43.461641371770504\n ],\n [\n -113.86642456054688,\n 43.40118121755815\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Skipp, Betty A. bskipp@usgs.gov","contributorId":1778,"corporation":false,"usgs":true,"family":"Skipp","given":"Betty","email":"bskipp@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":true,"id":846385,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sandberg, Charles sandberg@usgs.gov","contributorId":199124,"corporation":false,"usgs":true,"family":"Sandberg","given":"Charles","email":"sandberg@usgs.gov","affiliations":[{"id":35995,"text":"Geology, Geophysics, and Geochemistry Science Center","active":true,"usgs":true}],"preferred":true,"id":846386,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70232757,"text":"70232757 - 1975 - Structure and Paleozoic stratigraphy of a complex of thrust plates in the Fish Creek Reservoir area, south-central Idaho","interactions":[],"lastModifiedDate":"2022-07-12T14:59:08.409781","indexId":"70232757","displayToPublicDate":"1975-11-01T09:43:36","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":"Structure and Paleozoic stratigraphy of a complex of thrust plates in the Fish Creek Reservoir area, south-central Idaho","docAbstract":"

Permian, Pennsylvanian, Mississippian, Devonian, and Silurian marine rocks of diverse facies are brought together in a complex of six thrust sheets in the Fish Creek Reservoir area on the north edge of the Snake River Plain, Idaho. The lowest structural element, the parautochthon, is made of more than 450 m (1,500 ft) of folded and faulted Devonian miogeosynclinal carbonate rocks present in a 6.5-km2 (2.5-mi2 ) window. Along the east margin of the window, a sliver of continental margin transitional carbonate rocks of Early Devonian and Late Silurian age assigned to the Roberts Mountains Formation is thrust over the miogeosynclinal rocks. The window of middle Paleozoic rocks is overridden along the Fish Creek thrust fault by the flysch facies of the Copper Basin Formation, a turbidite-submarine-fan sequence more than 1,000 m (3,300 ft) thick, of Mississippian age. About 4.8 km (3 mi) southwest of the window, about 100 m (300 ft) of deepwater siliceous oceanic facies clastic rocks are exposed, which are assigned with question to the Milligen(?) Formation of Devonian age. These clastic rocks are interpreted to be thrust over the Copper Basin Formation. The highest structural elements are sequences more than 610 m (2,000 ft) thick of interbedded sandy and conglomeratic limestones, quartzites, and conglomerates and interbedded siltstones and argillites of the Wood River Formation of Middle Pennsylvanian to Early Permian age. The Wood River Formation is in thrust contact with the Milligen(?) Formation in the southwest part of the mapped area and with Copper Basin Formation along the west side of Fish Creek Reservoir. All the thrust sheets have moved eastward. The minimum distance moved is estimated from sedimentation models and facies reconstructions to range from perhaps several kilometres for the allochthon of the Roberts Mountains Formation to 48 km (30 mi) for the Milligen(?) Formation allochthon. The principal period of thrusting was post-Early Permian (post-Wood River Formation) and preEocene (pre-Challis Volcanics) and is of probable Sevier age. Middle Paleozoic rocks of the Milligen and Roberts Mountains Formations, however, also may have been involved in an earlier period of thrusting of latest Devonian to earliest Mississippian age related to the Antler orogeny. The thrust sheets were deformed into a northwest-trending dome in late Mesozoic time and were broken by basin-range faults during the Tertiary.

","language":"English","publisher":"U.S. Geological Survey","usgsCitation":"Skipp, B.A., and Hall, W.E., 1975, Structure and Paleozoic stratigraphy of a complex of thrust plates in the Fish Creek Reservoir area, south-central Idaho: Journal of Research of the U.S. Geological Survey, v. 3, no. 6, p. 671-689.","productDescription":"19 p.","startPage":"671","endPage":"689","costCenters":[],"links":[{"id":403496,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403494,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue6/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Idaho","otherGeospatial":"Fish Creek Reservoir area","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -114.46105957031249,\n 43.100982876188546\n ],\n [\n -113.6700439453125,\n 43.100982876188546\n ],\n [\n -113.6700439453125,\n 43.67979094030124\n ],\n [\n -114.46105957031249,\n 43.67979094030124\n ],\n [\n -114.46105957031249,\n 43.100982876188546\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Skipp, Betty A. bskipp@usgs.gov","contributorId":1778,"corporation":false,"usgs":true,"family":"Skipp","given":"Betty","email":"bskipp@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":true,"id":846383,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hall, Wayne E.","contributorId":89955,"corporation":false,"usgs":true,"family":"Hall","given":"Wayne","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":846384,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70232751,"text":"70232751 - 1975 - Description of the geoelectric section, Rattlesnake Hills unit 1 well, Washington","interactions":[],"lastModifiedDate":"2022-07-12T14:38:33.888469","indexId":"70232751","displayToPublicDate":"1975-11-01T09:33:02","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":"Description of the geoelectric section, Rattlesnake Hills unit 1 well, Washington","docAbstract":"

A complex 64-in. normal log from the 3,249-m-deep Rattlesnake Hills well was digitized and reduced to a form resembling a simple resistance log. The simplified form of the log made it possible to recognize three major geoelectric intervals in the well that were not apparent on the original log. The apparent resistivity values from each geoelectric interval are grouped into a frequency-distribution table, where midpoints of the class interval are corrected for the effects of hole diameter and mud resistivity. Using corrected class-interval midpoint resistivities, first-approximation values are calculated for five geoelectric parameters: total transverse resistance, total longitudinal conductance, average longitudinal resistivity, average transverse resistivity, and the coefficient of anisotropy. Comparison of anisotropies, resistivity variations, and resistivity-frequency polygon shapes indicates quantitative differences among the three geoelectric intervals.

","language":"English","publisher":"U.S. Geological Survey","usgsCitation":"Jackson, D.B., 1975, Description of the geoelectric section, Rattlesnake Hills unit 1 well, Washington: Journal of Research of the U.S. Geological Survey, v. 3, no. 6, p. 665-669.","productDescription":"5 p.","startPage":"665","endPage":"669","costCenters":[],"links":[{"id":403492,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403490,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue6/report.pdf"}],"country":"United States","state":"Washington","otherGeospatial":"Rattlesnake Hills","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -120.00778198242186,\n 46.36967413462374\n ],\n [\n -119.7784423828125,\n 46.36967413462374\n ],\n [\n -119.7784423828125,\n 46.523910423887635\n ],\n [\n -120.00778198242186,\n 46.523910423887635\n ],\n [\n -120.00778198242186,\n 46.36967413462374\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Jackson, Dallas B.","contributorId":19947,"corporation":false,"usgs":true,"family":"Jackson","given":"Dallas","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":846379,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70232749,"text":"70232749 - 1975 - Phosphate fertilizer materials in Colombia; imports, uses, and domestic supplies","interactions":[],"lastModifiedDate":"2022-07-12T14:31:21.879888","indexId":"70232749","displayToPublicDate":"1975-11-01T09:27:21","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":"Phosphate fertilizer materials in Colombia; imports, uses, and domestic supplies","docAbstract":"

The distribution of potentially economic phosphate deposits and the locations of major users of phosphate products in Colombia are some of the economic factors that indicate the capability of the deposits to supply domestic demands. Much research is required to determine the types of processing plants needed and to outline changes from standard procedures, but there is little doubt that with proper planning a phosphate chemical industry could be developed that would supply domestic demands for the forseeable future.

","language":"English","publisher":"U.S. Geological Survey","usgsCitation":"Cathcart, J.B., 1975, Phosphate fertilizer materials in Colombia; imports, uses, and domestic supplies: Journal of Research of the U.S. Geological Survey, v. 3, no. 6, p. 659-663.","productDescription":"5 p.","startPage":"659","endPage":"663","costCenters":[],"links":[{"id":403488,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403487,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue6/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"Colombia","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -78,\n 2\n ],\n [\n -70,\n 2\n ],\n [\n -70,\n 12\n ],\n [\n -78,\n 12\n ],\n [\n -78,\n 2\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Cathcart, James B.","contributorId":51201,"corporation":false,"usgs":true,"family":"Cathcart","given":"James","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":846376,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70232741,"text":"70232741 - 1975 - Progressive metamorphism of schists recovered from a deep drill hole near Fairbanks, Alaska","interactions":[],"lastModifiedDate":"2022-07-12T14:05:06.696481","indexId":"70232741","displayToPublicDate":"1975-11-01T08:55:00","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":"Progressive metamorphism of schists recovered from a deep drill hole near Fairbanks, Alaska","docAbstract":"

In 1965, a deep test hole drilled near Eielson Air Force Base, Fairbanks district, Alaska, penetrated 9,774 ft (2,979.1 m) into schists of the metamorphic complex of the Yukon-Tanana Upland. Cores recovered from the test hole show that the section is dominated by calc-magnesian rocks with subordinate pelitic schists. Pelitic mineral assemblages define a progressive increase in metamorphic grade with depth, from the garnet to the kyanite isograd. Diopside first appears in the calc-magnesian schists that were cored at a depth of 9,766 ft (2,976.5 m), indicating the onset of the reaction: Tremolite + 3 calcite -f- 2 quartz→5 diopside + 3CO2 +H2O. Ubiquitous staurolite and rare andalusite occur in the kyanite-bearing pelitic schists. Andalusite appears to have crystallized under postkinematic conditions, and the staurolite is apparently of both synkinematic and postkinematic origin. Hornblende and biotite from calc-magnesian schists sampled at depths of 7,142½ ft (2,176.9 m) and 9,766 ft (2,976.5 m) gave 40K/40Ar ages of 140±8 and 57.3±1.9 m.y., respectively. The hornblende age is believed to represent the age of the latest synkinematic metamorphism, and the biotite age appears to be an anomalously young one related to the outgassing of argon from biotite at greater depth in the section. Recent experimental data on andalusite-kyanite-sillimanite and staurolite equilibria and the stability field of calcite+quartz+tremolite versus diopside in calc-magnesian rocks suggest that the rocks recovered from the 8,218- to 9,770-ft (2,504.7- to 2,977.7-m) interval were synkinematieally recrystallized at crustal depths of 17 to 19 km and at temperatures of 515° to 580°C; the present thermal gradient (31.5°C/km) is similar to that which accompanied metamorphism in Jurassic time.

","language":"English","publisher":"U.S. Geological Survey","usgsCitation":"Forbes, R., and Weber, F.R., 1975, Progressive metamorphism of schists recovered from a deep drill hole near Fairbanks, Alaska: Journal of Research of the U.S. Geological Survey, v. 3, no. 6, p. 647-657.","productDescription":"11 p.","startPage":"647","endPage":"657","costCenters":[],"links":[{"id":403483,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":403482,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue6/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Alaska","city":"Fairbanks","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -147.1234130859375,\n 64.33515002176769\n ],\n [\n -145.810546875,\n 64.33515002176769\n ],\n [\n -145.810546875,\n 64.8885966973514\n ],\n [\n -147.1234130859375,\n 64.8885966973514\n ],\n [\n -147.1234130859375,\n 64.33515002176769\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Forbes, Robert B.","contributorId":48984,"corporation":false,"usgs":true,"family":"Forbes","given":"Robert B.","affiliations":[],"preferred":false,"id":846370,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Weber, Florence R.","contributorId":17621,"corporation":false,"usgs":true,"family":"Weber","given":"Florence","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":846371,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70156565,"text":"70156565 - 1975 - Evaluation of stochastic models describing movement of sediment particles on riverbeds","interactions":[],"lastModifiedDate":"2015-08-24T15:02:10","indexId":"70156565","displayToPublicDate":"1975-10-31T19:00:00","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":"Evaluation of stochastic models describing movement of sediment particles on riverbeds","docAbstract":"

Various stochastic models have been proposed to describe the movement of sediment particles on the riverbed. Here it is attempted to summarize in an integrated form and to generalize the most important theoretical results in this field. The approach adopted in this paper is based on the fact that most of the stochastic models are only special cases of a particular kind of random walk on the straight line.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Todorovic, P., and Nordin, C.F., 1975, Evaluation of stochastic models describing movement of sediment particles on riverbeds: Journal of Research of the U.S. Geological Survey, v. 3, no. 5, p. 513-517.","productDescription":"5 p.","startPage":"513","endPage":"517","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":307316,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":307315,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue5/report.pdf","text":"Report","size":"20.87 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"volume":"3","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55dc402ee4b0518e354d10fa","contributors":{"authors":[{"text":"Todorovic, Petar","contributorId":146951,"corporation":false,"usgs":false,"family":"Todorovic","given":"Petar","email":"","affiliations":[],"preferred":false,"id":569522,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Nordin, Carl F. Jr.","contributorId":74751,"corporation":false,"usgs":true,"family":"Nordin","given":"Carl","suffix":"Jr.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":569523,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70156572,"text":"70156572 - 1975 - A typical cross section based on magnetic data of lower and middle Keweenawan volcanic rocks, Ironwood area, Michigan","interactions":[],"lastModifiedDate":"2019-11-12T18:15:11","indexId":"70156572","displayToPublicDate":"1975-10-28T17:15:00","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 typical cross section based on magnetic data of lower and middle Keweenawan volcanic rocks, Ironwood area, Michigan","docAbstract":"

A north-trending aeromagnetic profile of a sequence of east-striking Keweenawan volcanic rocks near Ironwood, Mich., can be matched to a calculated profile over a model consisting of a series of dipping layers. (The dips were those measured by H. A. Hubbard along the north-trending valley of the Black River.) Remanent and induced magnetizations of 39 oriented cores from the Black River valley were determined by K. G. Books; felsite from Chippewa Hill and basalt from Algonquin Falls of middle Keweenawan age have normal Keweenawan magnetization and lower Keweenawan Powder Mill rocks have reverse magnetization. In the model these magetizations were assigned to 26 layers which alternated with very weakly magnetized layers. The best match of the calculated composite anomalies of remanent and induced magnetization and the aeromagnetic profile occurs if a deeper block of steeply dipping Powder Mill rocks is assumed to underlie the middle Keweenawan flows.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"King, E.R., 1975, A typical cross section based on magnetic data of lower and middle Keweenawan volcanic rocks, Ironwood area, Michigan: Journal of Research of the U.S. Geological Survey, v. 3, no. 5, p. 543-546.","productDescription":"4 p.","startPage":"543","endPage":"546","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":307329,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":307328,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue5/report.pdf","text":"Report","size":"20.87 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"country":"United States","state":"Michigan","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -90.6536865234375,\n 45.9874205909687\n ],\n [\n -89.14306640625,\n 45.9874205909687\n ],\n [\n -89.14306640625,\n 46.677710064644344\n ],\n [\n -90.6536865234375,\n 46.677710064644344\n ],\n [\n -90.6536865234375,\n 45.9874205909687\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55dc4029e4b0518e354d10d2","contributors":{"authors":[{"text":"King, Elizabeth R.","contributorId":40990,"corporation":false,"usgs":true,"family":"King","given":"Elizabeth","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":569542,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70156568,"text":"70156568 - 1975 - Lower Keweenawan volcanic rocks of Michigan and Wisconsin","interactions":[],"lastModifiedDate":"2019-11-12T18:10:06","indexId":"70156568","displayToPublicDate":"1975-10-28T17:15:00","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":"Lower Keweenawan volcanic rocks of Michigan and Wisconsin","docAbstract":"

Unconformable sequences of Keweenawan volcanic rocks occur in Michigan and adjacent Wisconsin. The sequences differ in types of rocks, magnetic properties, metamorphic grade, and pattern of structural deformation; they had different vent areas and were deposited in basins that were only partly overlapping. The older sequence includes the Bessemer Quartzite and two newly named formations that are here assigned to the lower Keweenawan. The younger sequence includes the well-known Portage Lake Volcanics and a younger unnamed formation, both of middle Keweenawan age. Formerly the older rocks were interpreted as a fault-repeated part of the Portage Lake Volcanics, but new evidence indicates that these older rocks had been metamorphosed and tilted and were being eroded in middle Keeweenawan time.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Hubbard, H., 1975, Lower Keweenawan volcanic rocks of Michigan and Wisconsin: Journal of Research of the U.S. Geological Survey, v. 3, no. 5.","productDescription":"13 p.","startPage":"541","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":307325,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":307320,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue5/report.pdf","text":"Report","size":"20.87 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"country":"United States","state":"Michigan, Wisconsin","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -91.4501953125,\n 46.01985337287631\n ],\n [\n -87.51708984375,\n 46.01985337287631\n ],\n [\n -87.51708984375,\n 47.517200697839414\n ],\n [\n -91.4501953125,\n 47.517200697839414\n ],\n [\n -91.4501953125,\n 46.01985337287631\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"5","edition":"529","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55dc4030e4b0518e354d1111","contributors":{"authors":[{"text":"Hubbard, Harold A.","contributorId":99203,"corporation":false,"usgs":true,"family":"Hubbard","given":"Harold A.","affiliations":[],"preferred":false,"id":569535,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70156578,"text":"70156578 - 1975 - Diagenesis of Miocene siliceous shales, Temblor Range, California","interactions":[],"lastModifiedDate":"2019-11-12T15:21:45","indexId":"70156578","displayToPublicDate":"1975-10-28T17:15:00","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":"Diagenesis of Miocene siliceous shales, Temblor Range, California","docAbstract":"

Siliceous Monterey Shale and related shales of the Temblor Range, Calif., are subdivided into three depth-controlled zones characterized by different forms of silica. These are, in descending stratigraphic order: (1) Biogenic opal zone, with remains of diatoms and other siliceous organisms, (2) diagenetic cristobalite zone, and (3) diagenetic quartz zone. Using the top of the youngest marine unit, the overlying Etchegoin Formation, as datum, the transition from biogenic opal to disordered cristobalite occurs within the Monterey Shale of Chico Martinez Creek at -730 m, and the ordered cristobalite-to-microquartz transition at about -2,030 m. Temperatures that prevailed at these transition depths while the sedimentary pile lay at the bottom of the sea are estimated at about 50° and 110°C, respectively. Diagenetic cristobalite manifests, downward through a 1,300-m interval of section, a progressive decrease in its d(101) spacing because of a gradual ordering of its internal structure through adjustments in the solid state. Diagenetic microquartz forms only from well-ordered cristobalite that provides the most appropriate concentration of dissolved silica for precipitation of microquartz. Scanning electron micrographs of the silica mineral in pores of rocks made up of disordered cristobalite show aggregates of well-formed bladed crystals, like those described from deep-sea cherts. The pore silica minerals in rocks made up of ordered cristobalite occur as dendritic growths of poorly formed stubby crystals, and the change in crystal habit could be an external expression of the internal ordering process.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Murata, K.J., and Larson, R., 1975, Diagenesis of Miocene siliceous shales, Temblor Range, California: Journal of Research of the U.S. Geological Survey, v. 3, no. 5, p. 553-566.","productDescription":"13 p.","startPage":"553","endPage":"566","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":307342,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":307341,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue5/report.pdf","text":"Report","size":"20.87 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"country":"United States","state":"California","otherGeospatial":"Temblor Range","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -121.13525390625,\n 33.99802726234877\n ],\n [\n -118.67980957031249,\n 33.99802726234877\n ],\n [\n -118.67980957031249,\n 35.91129848822746\n ],\n [\n -121.13525390625,\n 35.91129848822746\n ],\n [\n -121.13525390625,\n 33.99802726234877\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55dc402ee4b0518e354d10f1","contributors":{"authors":[{"text":"Murata, K. J.","contributorId":18759,"corporation":false,"usgs":true,"family":"Murata","given":"K.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":569566,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Larson, R.R.","contributorId":29803,"corporation":false,"usgs":true,"family":"Larson","given":"R.R.","email":"","affiliations":[],"preferred":false,"id":569567,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70156574,"text":"70156574 - 1975 - Replacement barite deposit, southern Independence Mountains, Nevada","interactions":[],"lastModifiedDate":"2019-11-12T18:22:51","indexId":"70156574","displayToPublicDate":"1975-10-28T17:15:00","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":"Replacement barite deposit, southern Independence Mountains, Nevada","docAbstract":"

Allochthonous Devonian chert, metaquartzite, and greenstone in the Blue Basin quadrangle,, southern Independence Mountains, Nevada, are mineralized with barite forming a deposit of possible commercial grade and size. Textural evidence indicates that the barite was deposited in the host rocks principally by replacement, to a lesser extent by a process involving displacement and expansion of the host-rock material, and to a very minor extent by fracture filling.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Ketner, K.B., 1975, Replacement barite deposit, southern Independence Mountains, Nevada: Journal of Research of the U.S. Geological Survey, v. 3, no. 5, p. 547-551.","productDescription":"5 p.","startPage":"547","endPage":"551","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":307338,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":307337,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue5/report.pdf","text":"Report","size":"20.87 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"country":"United States","state":"Nevada","otherGeospatial":"Independence Mountains, Blue Basin quadrangle, Singletree Creek quadrangle","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -116.57318115234375,\n 40.78470081841747\n ],\n [\n -115.72723388671875,\n 40.78470081841747\n ],\n [\n -115.72723388671875,\n 41.934976500546604\n ],\n [\n -116.57318115234375,\n 41.934976500546604\n ],\n [\n -116.57318115234375,\n 40.78470081841747\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55dc4031e4b0518e354d111c","contributors":{"authors":[{"text":"Ketner, Keith B.","contributorId":957,"corporation":false,"usgs":true,"family":"Ketner","given":"Keith","email":"","middleInitial":"B.","affiliations":[],"preferred":true,"id":569559,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70156589,"text":"70156589 - 1975 - Tectonic setting of the Tertiary volcanic rocks of the Olympic Peninsula, Washington","interactions":[],"lastModifiedDate":"2019-11-12T15:29:08","indexId":"70156589","displayToPublicDate":"1975-10-28T17:15:00","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":"Tectonic setting of the Tertiary volcanic rocks of the Olympic Peninsula, Washington","docAbstract":"

Lower and middle Eocene abyssal and Hawaiian type tholeiitic basalts form two accumulations that apparently were once far out on the east flank of the Juan de Fuca Ridge, within the Juan de Fuca plate. One of these (more than 15 km thick) is near the eastern and southeastern periphery of the Olympic Peninsula, and the other (about 5 km thick) is on the north. The tholeiites stratigraphically overlie and interfinger with Paleocene(?) and lower and middle Eocene marine turbidites and shales; one flow includes boulders that, like clasts in the sediments, were derived from the North American continental plate immediately to the east. The basalts are overlain stratigraphically by middle Eocene to middle Miocene clastic marine sedimentary rocks, which are in turn overlapped unconformably on the south and west by upper Miocene (?) and Pliocene, chiefly shallow-marine clastic rocks. These various peripheral rocks flank a middle or late Miocene structurally complex dome, or orocline convex to the east, in which originally east dipping and low angle late Eocene to late Miocene underthrusts are flexed. The outermost underthrust of the complex separates the chiefly volcanic peripheral rocks to the north, east, and south from stratigraphically correlative and comparable, though predominantly sedimentary, core rocks arranged in northwest trending arcuate belts or packets bounded by fault zones. Before underthrusting, and perhaps oroclinal folding connected with doming, the pre-middle Miocene section was possibly 150 to 200 km wide compared with the present Olympic Peninsula which is 120 km wide. The section accumulated on the ocean floor near the western margin of the continent, before and during subduction of the oceanic crust.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Cady, W., 1975, Tectonic setting of the Tertiary volcanic rocks of the Olympic Peninsula, Washington: Journal of Research of the U.S. Geological Survey, v. 3, no. 5, p. 573-582.","productDescription":"10 p.","startPage":"573","endPage":"582","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":307355,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":307354,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue5/report.pdf","text":"Report","size":"20.87 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"country":"United States","state":"Washington","otherGeospatial":"Olympic Peninsula","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -125.55725097656249,\n 46.543749602738565\n ],\n [\n -122.36572265625,\n 46.543749602738565\n ],\n [\n -122.36572265625,\n 48.719961222646276\n ],\n [\n -125.55725097656249,\n 48.719961222646276\n ],\n [\n -125.55725097656249,\n 46.543749602738565\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55dc4032e4b0518e354d112a","contributors":{"authors":[{"text":"Cady, Wallace M.","contributorId":146958,"corporation":false,"usgs":true,"family":"Cady","given":"Wallace M.","affiliations":[],"preferred":false,"id":569605,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70156608,"text":"70156608 - 1975 - Quaternary faults at San Diego Bay, California","interactions":[],"lastModifiedDate":"2015-08-25T08:01:13","indexId":"70156608","displayToPublicDate":"1975-10-28T17:15:00","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":"Quaternary faults at San Diego Bay, California","docAbstract":"

Acoustic-reflection profiles of subbottom strata reveal numerous faults that cut Quaternary deposits within and directly outside of San Diego Bay. These faults, together with previously mapped onshore faults, constitute the Rose Canyon fault zone that forms the local west boundary of the Santa Ana tectonic block, which is bounded on the east by the Elsinore fault zone. The minor earthquakes that have been felt in San Diego during historic time and accurately recorded during the past 41 yr are too infrequent to explain the observed rate of slip. The principal faulting is inferred to take place during moderate earthquakes similar to previous ones recorded along the west side of the Santa Ana block in 1933 at Long Beach, Calif., and in 1956 at San Miguel, Baja California. The known magnitudes of these previous events suggest that earthquakes in San Diego could attain a magnitude of approximately 6.5. An offset of the coast at Point La Jolla, when divided by the offset associated with previously studied earthquakes of magnitude 6.5, suggests that such events occur there at an average of approximately once every 600 yr.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Moore, G.W., and Kennedy, M.P., 1975, Quaternary faults at San Diego Bay, California: Journal of Research of the U.S. Geological Survey, v. 3, no. 5, p. 589-595.","productDescription":"7 p.","startPage":"589","endPage":"595","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":307363,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":307362,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue5/report.pdf","text":"Report","size":"20.87 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"country":"United States","state":"California","otherGeospatial":"San Diego Bay","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -118.5,\n 32\n ],\n [\n -118.5,\n 33.5\n ],\n [\n -116,\n 33.5\n ],\n [\n -116,\n 32\n ],\n [\n -118.5,\n 32\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55dd91bee4b0518e354dd1b2","contributors":{"authors":[{"text":"Moore, George W.","contributorId":21625,"corporation":false,"usgs":true,"family":"Moore","given":"George","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":569653,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kennedy, Michael P.","contributorId":63469,"corporation":false,"usgs":true,"family":"Kennedy","given":"Michael","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":569654,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70156614,"text":"70156614 - 1975 - Fossil fishes from the Pliocene or Pleistocene Cache Formation, Lake County, California","interactions":[],"lastModifiedDate":"2015-08-25T08:50:01","indexId":"70156614","displayToPublicDate":"1975-10-28T17:15:00","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":"Fossil fishes from the Pliocene or Pleistocene Cache Formation, Lake County, California","docAbstract":"

The remains of fossil fishes comprising three species were found in the Cache Formation in Lake County, Calif. The rocks containing the fossils are considered to be late Pliocene or early Pleistocene. The species are all freshwater and primarily quiet-water types that now live in Clear Lake and the waters of the surrounding area, suggesting continuity between the present lake and a lake represented by the rocks of the Cache Formation.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Casteel, R.W., and Rymer, M.J., 1975, Fossil fishes from the Pliocene or Pleistocene Cache Formation, Lake County, California: Journal of Research of the U.S. Geological Survey, v. 3, no. 5, p. 619-622.","productDescription":"4 p.","startPage":"619","endPage":"622","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":307375,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":307374,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue5/report.pdf","text":"Report","size":"20.87 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"country":"United States","state":"California","county":"Lake County","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -122.7,\n 38.8\n ],\n [\n -122.7,\n 39\n ],\n [\n -122.6,\n 39\n ],\n [\n -122.6,\n 38.8\n ],\n [\n -122.7,\n 38.8\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55dd91b4e4b0518e354dd169","contributors":{"authors":[{"text":"Casteel, Richard W.","contributorId":28241,"corporation":false,"usgs":true,"family":"Casteel","given":"Richard","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":569670,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rymer, Michael J. mrymer@usgs.gov","contributorId":1522,"corporation":false,"usgs":true,"family":"Rymer","given":"Michael","email":"mrymer@usgs.gov","middleInitial":"J.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":569671,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70156609,"text":"70156609 - 1975 - Age of volcanism, intrusion, and mineralization in the Thomas Range, Keg Mountain, and Desert Mountain, western Utah","interactions":[],"lastModifiedDate":"2015-08-25T08:20:11","indexId":"70156609","displayToPublicDate":"1975-10-28T17:15:00","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":"Age of volcanism, intrusion, and mineralization in the Thomas Range, Keg Mountain, and Desert Mountain, western Utah","docAbstract":"

Twenty-six new age determinations by the fission-track method establish a chronology for volcanism, intrusion, and mineralization in the Thomas Range, Keg Mountain, and Desert Mountain, in western Utah. The fission-track ages confirm D. R. Shawe's three-fold classification of igneous rocks. The oldest group of rocks consists of flows, agglomerates, and some ash-flow tuffs that were deposited 38-39 m.y. ago. The middle group contains widespread rhyolitic ash-flow tuffs that originated from local volcanic centers 30-32 m.y. ago. A dike emplaced along the probable ring-fracture zone of the Keg caldera about 31 m.y. ago indicates that caldera collapse occurred soon after eruption of ash-flow tuffs. Rocks believed to belong-to the middle group also were intruded by the quartz monzonite of Desert Mountain 27-30 m.y. ago. Little or no igneous activity took place within the next 20 m.y., during which time the region was strongly broken by Basin-and-Range faulting. Rhyolites of the youngest group were extruded 8-10 m.y. ago in the Keg Mountain area and 6-7 m.y. ago in the Thomas Range. The beryllium-fluorite mineralization at Spor Mountain occurred after the rhyolitic volcanism in the Thomas Range.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Lindsey, D.A., Naeser, C.W., and Shawe, D., 1975, Age of volcanism, intrusion, and mineralization in the Thomas Range, Keg Mountain, and Desert Mountain, western Utah: Journal of Research of the U.S. Geological Survey, v. 3, no. 5, p. 597-604.","productDescription":"8 p.","startPage":"597","endPage":"604","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":307364,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue5/report.pdf","text":"Report","size":"20.87 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"},{"id":307365,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Utah","otherGeospatial":"Thomas Range, Keg Mountain, Desert Mountain","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -113.25,\n 39.5\n ],\n [\n -113.25,\n 40\n ],\n [\n -112.75,\n 40\n ],\n [\n -112.75,\n 39.5\n ],\n [\n -113.25,\n 39.5\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55dd91ace4b0518e354dd117","contributors":{"authors":[{"text":"Lindsey, David A. 0000-0002-9466-0899 dlindsey@usgs.gov","orcid":"https://orcid.org/0000-0002-9466-0899","contributorId":773,"corporation":false,"usgs":true,"family":"Lindsey","given":"David","email":"dlindsey@usgs.gov","middleInitial":"A.","affiliations":[{"id":171,"text":"Central Mineral and Environmental Resources Science Center","active":true,"usgs":true}],"preferred":true,"id":569655,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Naeser, Charles W.","contributorId":76281,"corporation":false,"usgs":true,"family":"Naeser","given":"Charles","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":569656,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Shawe, Daniel R.","contributorId":91448,"corporation":false,"usgs":true,"family":"Shawe","given":"Daniel R.","affiliations":[],"preferred":false,"id":569657,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70156606,"text":"70156606 - 1975 - Tectonics of the western Valley and Ridge foldbelt, Pendleton County, West Virginia - a summary report","interactions":[],"lastModifiedDate":"2015-08-25T07:50:22","indexId":"70156606","displayToPublicDate":"1975-10-28T17:15:00","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":"Tectonics of the western Valley and Ridge foldbelt, Pendleton County, West Virginia - a summary report","docAbstract":"

A belt of high anticlines, the Nittany anticlinorium, occupies the western Valley and Ridge foldbelt in the central Appalachians. It extends southwestward from the Nittany arch of central Pennsylvania into the Virginias. An investigation of the tectonics of this anticlinorium in Pendleton County, W. Va., rules out active basement involvement in the deformation of the area. Cross-sectional models consistent with the accumulated data show that Middle Cambrian through Middle Ordovician carbonate rocks are technically stacked, shingle-fashion, from southeast to northwest below predominantly folded younger strata that have undergone less lateral shortening. Differential shortening in this area is of the proper order to balance cover deformation in the Allegheny synclinorium to the west. Field relations suggest a long period of abnormally high fluid pressures in Lower Devonian and older strata during deformation. At this time, the area was under sufficient northwest, near-horizontal compressive stress for abundant quartz deformation lamellae to form. Gravity sliding is ruled out as the deforming mechanism for this part of the Appalachian foldbelt. No significant tectonism appears to have occurred prior to Pennsylvanian time in this area.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Perry, W.J., 1975, Tectonics of the western Valley and Ridge foldbelt, Pendleton County, West Virginia - a summary report: Journal of Research of the U.S. Geological Survey, v. 3, no. 5, p. 583-588.","productDescription":"6 p.","startPage":"583","endPage":"588","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":307361,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":307359,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue5/report.pdf","text":"Report","size":"20.87 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"country":"United States","state":"West Virginia","county":"Pendleton County","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -81.2,\n 37.5\n ],\n [\n -81.2,\n 40\n ],\n [\n -78.5,\n 40\n ],\n [\n -78.5,\n 37.5\n ],\n [\n -81.2,\n 37.5\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55dd91bfe4b0518e354dd1c6","contributors":{"authors":[{"text":"Perry, William J. Jr.","contributorId":32498,"corporation":false,"usgs":true,"family":"Perry","given":"William","suffix":"Jr.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":569652,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70156616,"text":"70156616 - 1975 - Revised value for the O18 fractionation between CO2 and H2O at 25°C","interactions":[],"lastModifiedDate":"2015-08-25T08:57:41","indexId":"70156616","displayToPublicDate":"1975-10-28T17:15:00","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":"Revised value for the O18 fractionation between CO2 and H2O at 25°C","docAbstract":"

A new value of 1.0412 for the fractionation factor a between CO2 and H2O at 25°C is recommended on the basis of new data and a reevaluation of earlier published data.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"O’Neil, J.R., Adami, L.H., and Epstein, S., 1975, Revised value for the O18 fractionation between CO2 and H2O at 25°C: Journal of Research of the U.S. Geological Survey, v. 3, no. 5, p. 623-624.","productDescription":"2 p.","startPage":"623","endPage":"624","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":307377,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":307376,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue5/report.pdf","text":"Report","size":"20.87 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"volume":"3","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55dd91bee4b0518e354dd1b6","contributors":{"authors":[{"text":"O’Neil, James R.","contributorId":70762,"corporation":false,"usgs":true,"family":"O’Neil","given":"James","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":569676,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Adami, Lanford H.","contributorId":146967,"corporation":false,"usgs":false,"family":"Adami","given":"Lanford","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":569677,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Epstein, Samuel","contributorId":146968,"corporation":false,"usgs":false,"family":"Epstein","given":"Samuel","email":"","affiliations":[],"preferred":false,"id":569678,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70156618,"text":"70156618 - 1975 - Spectrochemical determination of trace elements in galena","interactions":[],"lastModifiedDate":"2015-08-25T09:02:57","indexId":"70156618","displayToPublicDate":"1975-10-28T17:15:00","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":"Spectrochemical determination of trace elements in galena","docAbstract":"

A semiquantitative spectrochemical method is described by means of which 10-mg samples of galena can be analyzed for their trace element content. Results on 40 elements are reported as six logarithmically spaced intervals per order of magnitude and obtained by visual comparison with standards prepared in spectrographically pure lead sulfide. Detection limits are generally between 1 and 20 ppm (except for Ce, Na, Sr, Ta, and Zn, which are 50 to 100 ppm). Replicate analyses of galena samples indicate a precision comparable to other semiquantitative spectrochemical methods used for the analysis of geochemical samples. Results obtained from the analysis of 129 galena samples are summarized.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Mosier, E.L., Antweiler, J., and Nishi, J.M., 1975, Spectrochemical determination of trace elements in galena: Journal of Research of the U.S. Geological Survey, v. 3, no. 5, p. 625-631.","productDescription":"7 p.","startPage":"625","endPage":"631","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":307381,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":307380,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue5/report.pdf","text":"Report","size":"20.87 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"volume":"3","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55dd91bee4b0518e354dd1bc","contributors":{"authors":[{"text":"Mosier, E. L.","contributorId":71537,"corporation":false,"usgs":true,"family":"Mosier","given":"E.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":569686,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Antweiler, J.C.","contributorId":35722,"corporation":false,"usgs":true,"family":"Antweiler","given":"J.C.","email":"","affiliations":[],"preferred":false,"id":569687,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nishi, J. M.","contributorId":89886,"corporation":false,"usgs":true,"family":"Nishi","given":"J.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":569688,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70156611,"text":"70156611 - 1975 - Geomorphic evidence for late Holocene tilting in southern San Mateo County, California","interactions":[],"lastModifiedDate":"2015-08-25T08:40:39","indexId":"70156611","displayToPublicDate":"1975-10-28T17:15:00","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":"Geomorphic evidence for late Holocene tilting in southern San Mateo County, California","docAbstract":"

Relations between the stream channels and the alluvial deposits along Bradley Creek and the lower part of Butano Creek suggest that the area has been tilted very recently, and localized swampy conditions supply additional supporting evidence. Radiocarbon dates show that some of the valley alluvium along Butano Creek was deposited no more than 750-800 yr ago, and tilting must have Occurred since that time.

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Adam, D.P., 1975, Geomorphic evidence for late Holocene tilting in southern San Mateo County, California: Journal of Research of the U.S. Geological Survey, v. 3, no. 5, p. 613-617.","productDescription":"5 p.","startPage":"613","endPage":"617","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":307371,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":307370,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue5/report.pdf","text":"Report","size":"20.87 MB","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"country":"United States","state":"California","county":"San Mateo","otherGeospatial":"Bradley Creek, Butano Creek","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -122.39,\n 37\n ],\n [\n -122.39,\n 37.4\n ],\n [\n -122.17,\n 37.4\n ],\n [\n -122.17,\n 37\n ],\n [\n -122.39,\n 37\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55dd91b4e4b0518e354dd173","contributors":{"authors":[{"text":"Adam, David P.","contributorId":36132,"corporation":false,"usgs":true,"family":"Adam","given":"David","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":569669,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70156610,"text":"70156610 - 1975 - The Oligocene volcanic center at Eureka, Nevada","interactions":[],"lastModifiedDate":"2018-06-15T12:16:50","indexId":"70156610","displayToPublicDate":"1975-10-28T17:00:00","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":"The Oligocene volcanic center at Eureka, Nevada","docAbstract":"

A volcanic center covering an area of about 80 km2 near Eureka, Nev., and active in the early Oligocene, is characterized by rhyolitic, rhyodacitic. and andesitic pyroclastic rocks, lava flows, and shallow intrusive bodies. These rocks were emplaced as intertonguing and interpenetrative units during a 5-m.y. interval; most of the volcanism was in the last 3 million years of this period (36 to 33 m.y. ago).

","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Blake, M., McKee, E., Marvin, R.F., Silberman, M.L., and Nolan, T.B., 1975, The Oligocene volcanic center at Eureka, Nevada: Journal of Research of the U.S. Geological Survey, v. 3, no. 5, p. 605-612.","productDescription":"8 p.","startPage":"605","endPage":"612","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":307367,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":307366,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1975/vol3issue5/report.pdf","text":"Report","size":"20.87","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"country":"United States","state":"Nevada","city":"Eureka","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -116,\n 39.3\n ],\n [\n -116,\n 39.7\n ],\n [\n -115,\n 39.7\n ],\n [\n -115,\n 39.3\n ],\n [\n -116,\n 39.3\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"3","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55dd91bfe4b0518e354dd1cb","contributors":{"authors":[{"text":"Blake, M.C. Jr.","contributorId":27094,"corporation":false,"usgs":true,"family":"Blake","given":"M.C.","suffix":"Jr.","affiliations":[],"preferred":false,"id":569658,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McKee, E.H.","contributorId":20736,"corporation":false,"usgs":true,"family":"McKee","given":"E.H.","email":"","affiliations":[],"preferred":false,"id":569659,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Marvin, Richard F.","contributorId":23125,"corporation":false,"usgs":true,"family":"Marvin","given":"Richard","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":569660,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Silberman, Miles L.","contributorId":23947,"corporation":false,"usgs":true,"family":"Silberman","given":"Miles","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":569661,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Nolan, Thomas B.","contributorId":102477,"corporation":false,"usgs":true,"family":"Nolan","given":"Thomas","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":569662,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ]}