Uranium, thorium, and potassium concentrations were measured in 60 samples collected from an exploratory hole drilled in the Belmont stock about 40 miles north-northeast of Tonopah, Nev. The results indicate that, at least within 2,000 feet of the surface, the granitic pluton contains radioelement concentrations similar to those in average granodiorites and that local variations in concentrations may reflect the effects of argillic alteration.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Bunker, C.M., and Bush, C.A., 1973, Radioelement and radiogenic heat distribution in Drill Hole UCe-1, Belmont Stock, Central Nevada: Journal of Research of the U.S. Geological Survey, v. 1, no. 3, p. 289-292.","productDescription":"4 p.","startPage":"289","endPage":"292","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":313003,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":313002,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1973/vol1issue3/report.pdf","text":"Report","size":"23.61 MB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States of America","state":"Nevada","otherGeospatial":"Belmont Stock","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -117.828369140625,\n 38.466492845389446\n ],\n [\n -118.29528808593751,\n 39.46588451142042\n ],\n [\n -117.48779296875,\n 40.153686857794035\n ],\n [\n -116.3177490234375,\n 40.19146303804063\n ],\n [\n -115.5047607421875,\n 39.88866516883715\n ],\n [\n -115.257568359375,\n 39.07464374293249\n ],\n [\n -115.73547363281249,\n 38.41916639395372\n ],\n [\n -117.0538330078125,\n 38.449286817153556\n ],\n [\n -117.828369140625,\n 38.466492845389446\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"1","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5683bcbee4b0a04ef4925e5b","contributors":{"authors":[{"text":"Bunker, C. M.","contributorId":75138,"corporation":false,"usgs":true,"family":"Bunker","given":"C.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":583693,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Bush, C. A.","contributorId":43344,"corporation":false,"usgs":true,"family":"Bush","given":"C.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":583694,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70160729,"text":"70160729 - 1973 - The chemistry of five accessory rock-forming apatites","interactions":[],"lastModifiedDate":"2015-12-29T14:38:37","indexId":"70160729","displayToPublicDate":"1973-03-01T02:30:00","publicationYear":"1973","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 chemistry of five accessory rock-forming apatites","docAbstract":"Chemical and physical data are given for five samples of rock-forming apatite from diverse geologic environments in Nevada and Colorado. Four of these apatites contain rare-earth assemblages in which the cerium group is well represented but the yttrium group predominates. The fifth apatite contains a highly fractionated assemblage of the lighter (cerium group) rare earths similar to the assemblage typical of alkulic rocks.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Lee, D., Rose, H.J., Brandt, E.L., and Van Loenen, R.E., 1973, The chemistry of five accessory rock-forming apatites: Journal of Research of the U.S. Geological Survey, v. 1, no. 3, p. 267-272.","productDescription":"6 p.","startPage":"267","endPage":"272","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":313010,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":313009,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1973/vol1issue3/report.pdf","text":"Report","size":"23.61 MB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States of America","state":"Nevada, Colorado","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -120.05859375,\n 42.293564192170095\n ],\n [\n -113.90625,\n 42.35854391749705\n ],\n [\n -113.73046875,\n 41.04621681452063\n ],\n [\n -102.3046875,\n 41.1455697310095\n ],\n [\n -101.865234375,\n 41.1455697310095\n ],\n [\n -101.865234375,\n 36.914764288955936\n ],\n [\n -114.08203125,\n 36.63316209558658\n ],\n [\n -114.7412109375,\n 34.88593094075317\n ],\n [\n -120.32226562500001,\n 38.788345355085625\n ],\n [\n -120.05859375,\n 42.293564192170095\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"1","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5683bcbee4b0a04ef4925e5d","contributors":{"authors":[{"text":"Lee, Donald E.","contributorId":11615,"corporation":false,"usgs":true,"family":"Lee","given":"Donald E.","affiliations":[],"preferred":false,"id":583707,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rose, Harry J. Jr.","contributorId":39013,"corporation":false,"usgs":true,"family":"Rose","given":"Harry","suffix":"Jr.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":583708,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Brandt, Elaine L. Munson","contributorId":19553,"corporation":false,"usgs":true,"family":"Brandt","given":"Elaine","email":"","middleInitial":"L. Munson","affiliations":[],"preferred":false,"id":583709,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Van Loenen, Richard E.","contributorId":13951,"corporation":false,"usgs":true,"family":"Van Loenen","given":"Richard","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":583710,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70160718,"text":"70160718 - 1973 - Two diamictons in a landslide scarp on Admiralty Island, Alaska, and the tectonic insignificance of an intervening peat bed","interactions":[],"lastModifiedDate":"2015-12-29T12:52:27","indexId":"70160718","displayToPublicDate":"1973-03-01T02:30:00","publicationYear":"1973","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":"Two diamictons in a landslide scarp on Admiralty Island, Alaska, and the tectonic insignificance of an intervening peat bed","docAbstract":"Two till-like diamictons, 700 feet above present sea level on Admiralty Island, Alaska, are separated by peat near the top of a landslide scarp. The lower diamicton is glaciomarine; the upper diamicton is probably a mudflow. The lower diamicton contains the foraminifer Elphidium clavatum Cushman, a species typical of fiords. Similar diamicton crops out along Gastineau Channel near Juneau, 15 miles eastward. Diamicton in both areas reflects deposition in glacier-free fiords during land depression and sea transgression. Consequently,
till-like deposits less than 700 feet above sea level elsewhere in southeastern Alaska should be considered as possibly glaciomarine. Sliding occurred after late 1962, but before July 1964; the March 27, 1964, Alaska earthquake might have caused sliding of diamicton saturated by melting snow and spring rains. The peat in the landslide scarp has a published radiocarbon date of 3,400±250 years B.P. (W-1955). The peat was expected to be older, and to relate to Holocene tectonic movement of Admiralty Island. The unexpectedly young date led to additional field study that showed the material over the peat to be a probable mudflow derived from glaciomarine diamicton upvalley; the date has no tectonic significance.
Maps with aerial photograph image bases have gained wide popularity. The orthophotomap presents an abundance of ground detail and information that cannot be shown on a line map with standard cartographic symbols. In preparing a map base covering areas of little relief, the imagery is fitted to map control with a conventional rectifier, but for areas of significant relief, the photographs are reproduced in an orthophotoscope to remove the effects of both camera tilt and terrain relief.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"McKenzie, M.L., 1973, Photoimages for map bases: Journal of Research of the U.S. Geological Survey, v. 1, no. 3, p. 327-339.","productDescription":"13 p.","startPage":"327","endPage":"339","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":312990,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":312989,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1973/vol1issue3/report.pdf","text":"Report","size":"23.61 MB","linkFileType":{"id":1,"text":"pdf"}}],"volume":"1","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5683bcbce4b0a04ef4925e59","contributors":{"authors":[{"text":"McKenzie, Morris L.","contributorId":150930,"corporation":false,"usgs":false,"family":"McKenzie","given":"Morris","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":583672,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70160714,"text":"70160714 - 1973 - Microbiological aspects of ground-water recharge injection of purified unchlorinated sewage effluent at Bay Park, Long Island, N. Y.","interactions":[],"lastModifiedDate":"2015-12-29T12:30:38","indexId":"70160714","displayToPublicDate":"1973-03-01T02:15:00","publicationYear":"1973","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":"Microbiological aspects of ground-water recharge injection of purified unchlorinated sewage effluent at Bay Park, Long Island, N. Y.","docAbstract":"Unchlorinated, tertiary-treated sewage effluent was injected through a well at Bay Park, Long Island, N.Y., into a sand aquifer at a rate of 340 gpm for 10 days. Massive, biologically produced slime deposits formed in the filter pack immediately adjacent to the well screen. Observed head buildup in the recharge well was correlated with the formation of these deposits. Comparison of results from this test with results of earlier tests suggests that formation of these deposits may be avoided by addition of chlorine to the injectant.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","collaboration":"Prepared in cooperation with the Nassau County Department of Public Works","usgsCitation":"Ehrlich, G.G., Ehlke, T.A., and Vecchioli, J., 1973, Microbiological aspects of ground-water recharge injection of purified unchlorinated sewage effluent at Bay Park, Long Island, N. Y.: Journal of Research of the U.S. Geological Survey, v. 1, no. 3, p. 341-344.","productDescription":"4 p.","startPage":"341","endPage":"344","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":312988,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":312987,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1973/vol1issue3/report.pdf","text":"Report","size":"23.61 MB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States of America","state":"New York","city":"Long Island","otherGeospatial":"Bay Park","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -73.6659049987793,\n 40.6364923284663\n ],\n [\n -73.65835189819336,\n 40.63440803384346\n ],\n [\n -73.66092681884766,\n 40.627894193764035\n ],\n [\n -73.66178512573242,\n 40.622031194415\n ],\n [\n -73.6688232421875,\n 40.622812957398224\n ],\n [\n -73.6659049987793,\n 40.6364923284663\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"1","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5683bcbce4b0a04ef4925e55","contributors":{"authors":[{"text":"Ehrlich, G. G.","contributorId":89126,"corporation":false,"usgs":true,"family":"Ehrlich","given":"G.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":583669,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ehlke, Theodore A.","contributorId":83523,"corporation":false,"usgs":true,"family":"Ehlke","given":"Theodore","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":583670,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Vecchioli, John","contributorId":36113,"corporation":false,"usgs":true,"family":"Vecchioli","given":"John","email":"","affiliations":[],"preferred":false,"id":583671,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70160735,"text":"70160735 - 1973 - Are the granitic rocks of the Salinian block trondhjemitic?","interactions":[],"lastModifiedDate":"2015-12-29T15:40:34","indexId":"70160735","displayToPublicDate":"1973-03-01T01:15:00","publicationYear":"1973","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":"Are the granitic rocks of the Salinian block trondhjemitic?","docAbstract":"Trondhjemitic rocks are relatively abundant in the granitic terranes of the western Sierra Nevada and the Klamath Mountains but have not been found in the granitic plutons of the Salinian block, which lies westward, across the San Andreas fault. A ternary plot of modal quartz : K-feldspar : plagioclase from more than 200 granitic samples from the Salinian block has an elongate, nearly horizontal, quartz-rich trend that appears trondhjemitic to some observers. However, petrographic and chemical comparison of these rocks with trondhjemite from the type area in Norway and with rocks called trondhjemite in the Western United States shows that the granitic rocks of the Salinian block are not trondhjemitic. The absence of trondhjemite in the Salinian block further supports the contention that this terrane is not merely a westward continuation of Sierran basement but is a displaced basement block.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Ross, D.C., 1973, Are the granitic rocks of the Salinian block trondhjemitic?: Journal of Research of the U.S. Geological Survey, v. 1, no. 3, p. 251-254.","productDescription":"4 p.","startPage":"251","endPage":"254","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":313017,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1973/vol1issue3/report.pdf","text":"Report","size":"23.61 MB","linkFileType":{"id":1,"text":"pdf"}},{"id":313018,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States of America","state":"California","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -124.43115234375,\n 42.08191667830631\n ],\n [\n -119.88281249999999,\n 42.09822241118974\n ],\n [\n -119.7509765625,\n 39.11301365149975\n ],\n [\n -113.73046875,\n 34.470335121217495\n ],\n [\n -114.63134765625001,\n 32.75032260780972\n ],\n [\n -119.88281249999999,\n 32.175612478499325\n ],\n [\n -122.27783203125,\n 36.56260003738548\n ],\n [\n -124.07958984375001,\n 38.90813299596705\n ],\n [\n -124.91455078125,\n 40.91351257612758\n ],\n [\n -124.43115234375,\n 42.08191667830631\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"1","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5683bcbae4b0a04ef4925e49","contributors":{"authors":[{"text":"Ross, Donald C.","contributorId":146987,"corporation":false,"usgs":true,"family":"Ross","given":"Donald","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":583730,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70159983,"text":"70159983 - 1973 - Rapid reaction rates between water and a calcareous clay as observed by specific-ion electrodes","interactions":[],"lastModifiedDate":"2015-12-05T15:52:38","indexId":"70159983","displayToPublicDate":"1973-03-01T01:15:00","publicationYear":"1973","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":"Rapid reaction rates between water and a calcareous clay as observed by specific-ion electrodes","docAbstract":"Specific-ion electrodes were used to simultaneously determine the activity changes of calcium, hydrogen, sodium, fluoride, and divalent ions when 50 g of a natural, untreated material containing calcium-rich mixed-layer illite-montmorillonite clay, quartz sand, and calcium carbonate was added to 250 ml of natural Canadian River water containing 220 mg/1 Na. Calcium and magnesium were displaced from the clay by the sodium; the exchanged and dissolved noncarbonate calcium precipitated as calcium carbonate, and the magnesium remained in solution. Fluoride entered into both a rapid reaction and a long-term reaction, indicating solution from the material. The pH decreased rapidly. The reactions for all observed ions, other than fluoride, were faster than the response time of their respective electrodes and were complete in less than one minute. Rapid solution of material containing calcium, magnesium, sodium, and fluoride was also observed when a duplicate sample of the earth material was added to distilled water; pH also changed rapidly in this mixture. These results suggest that many important water-rock reactions can be considered nearly instantaneous for purposes of digital modeling of the geochemical changes during artificial recharge.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Wood, W., 1973, Rapid reaction rates between water and a calcareous clay as observed by specific-ion electrodes: Journal of Research of the U.S. Geological Survey, v. 1, no. 2, p. 237-241.","productDescription":"4 p.","startPage":"237","endPage":"241","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":311973,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1973/vol1issue2/report.pdf","text":"Report","size":"26.1 MB","linkFileType":{"id":1,"text":"pdf"}},{"id":311974,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States of America","volume":"1","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"566418c8e4b06a3ea36c7aff","contributors":{"authors":[{"text":"Wood, Warren W.","contributorId":47770,"corporation":false,"usgs":false,"family":"Wood","given":"Warren W.","affiliations":[{"id":6601,"text":"Michigan State University","active":true,"usgs":false}],"preferred":false,"id":581422,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70159984,"text":"70159984 - 1973 - Formation of joints in bedrock by moving glacial ice","interactions":[],"lastModifiedDate":"2015-12-05T16:02:53","indexId":"70159984","displayToPublicDate":"1973-03-01T01:15:00","publicationYear":"1973","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":"Formation of joints in bedrock by moving glacial ice","docAbstract":"The orientation of joints in igneous and sedimentary rocks was measured at 21 localities in California, Maine, and New York to investigate the hypothesis that glaciation may open joints in bedrock. A summary of strikes of all joint sets shows the following pattern relative to the direction of glacial advance: two sets, thought to be extension joints, flank the direction of advance and are separated from it by about 10°; two sets, thought to be shear joints, flank the direction of advance by about 40°; and two sets, thought to be release joints, are about 70° to 80° from the direction of advance, or nearly perpendicular to the extension joints. An average of five joint sets, including three or four in this pattern, was found at each locality. The joints are believed to have been opened, in response to stress applied by the moving ice, along preexisting zones of weakness (potential regional joints) in the rock. Some new joints may have formed where no such zone was present near the position required for fracture under the applied stress. Additional investigation of the hypothesis is desirable because of its possible bearing on glacial erosion by quarrying, on interpretation of joint patterns in glaciated regions, and on the nature of aquifers in glaciated bedrock.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Trainer, F.W., 1973, Formation of joints in bedrock by moving glacial ice: Journal of Research of the U.S. Geological Survey, v. 1, no. 2, p. 229-235.","productDescription":"7 p.","startPage":"229","endPage":"235","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":311976,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":311975,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1973/vol1issue2/report.pdf","text":"Report","size":"26.1 MB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States of America","state":"California, Maine, New York","volume":"1","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"566418bee4b06a3ea36c7af9","contributors":{"authors":[{"text":"Trainer, Frank W.","contributorId":103655,"corporation":false,"usgs":true,"family":"Trainer","given":"Frank","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":581423,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70159985,"text":"70159985 - 1973 - Photomechanical experiments in automated cartography","interactions":[],"lastModifiedDate":"2015-12-05T16:12:19","indexId":"70159985","displayToPublicDate":"1973-03-01T01:15:00","publicationYear":"1973","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":"Photomechanical experiments in automated cartography","docAbstract":"The U.S. Geological Survey recently undertook the investigation of two seemingly unrelated cartographic tasks: (1) the preparation of map copy for digitizing and (2) the production of experimental slope maps. Both tasks, however, require techniques and equipment for changing or manipulating the line weights of existing map symbols and producing suitable reproduction copy. After a study of existing equipment, a prototype revolving illuminator was designed and fabricated for experiments in line-weight manipulation. Sufficient exposures have been made with the device to indicate that positive control of line-weight increases and decreases up to 0.2 inch is attainable. The device has been used for photomechanical experiments in slope mapping, hill shading, and preparation of map copy for digitizing.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Gilman, C., 1973, Photomechanical experiments in automated cartography: Journal of Research of the U.S. Geological Survey, v. 1, no. 2, p. 223-227.","productDescription":"5 p.","startPage":"223","endPage":"227","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":311978,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":311977,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1973/vol1issue2/report.pdf","text":"Report","size":"26.1 MB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States of America","volume":"1","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"566418c7e4b06a3ea36c7afd","contributors":{"authors":[{"text":"Gilman, C.R.","contributorId":13141,"corporation":false,"usgs":true,"family":"Gilman","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":581424,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70160728,"text":"70160728 - 1973 - Petrography and structural relations of granitic basement rocks in the Monterey Bay area, California","interactions":[],"lastModifiedDate":"2018-06-12T11:53:53","indexId":"70160728","displayToPublicDate":"1973-03-01T01:15:00","publicationYear":"1973","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":"Petrography and structural relations of granitic basement rocks in the Monterey Bay area, California","docAbstract":"In the past, the granitic basement of the Coast Ranges has been thought to be dominantly quartz diorite and low in K-feldspar. However, a study of outcrops around Monterey Bay, basement well samples, and dredge samples from Monterey Bay shows that the granitic basement averages about 15 to 20 percent K-feldspar. Therefore, as a sedimentary provenance, the basement around Monterey Bay could have contributed abundant K-feldspar to the Cenozoic sedimentary deposits of the region; that is, in the Monterey Bay area the local basement is an adequate source for the abundant K-feldspar in the sedimentary units. The distribution of basement rocks and mapped faults, coupled with gravity-geophysical data, suggests that the area between the San Andreas and Sur-Nacimiento fault zones (the Salinian block) near Monterey Bay is broken into several discrete structural blocks. Some of these blocks juxtapose not only different basement rocks, but also different contour patterns on the buried basement surface. These features suggest large strike-slip movements along some faults within the Salinian block in the Monterey Bay area.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Ross, D.C., and Brabb, E.E., 1973, Petrography and structural relations of granitic basement rocks in the Monterey Bay area, California: Journal of Research of the U.S. Geological Survey, v. 1, no. 3, p. 273-282.","productDescription":"10 p.","startPage":"273","endPage":"282","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":313008,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":313007,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1973/vol1issue3/report.pdf","text":"Report","size":"23.61 MB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States of America","state":"California","otherGeospatial":"Monterey Bay","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -122.13775634765625,\n 36.94440418245903\n ],\n [\n -122.00042724609374,\n 36.986100060204095\n ],\n [\n -121.8878173828125,\n 36.99158465967016\n ],\n [\n -121.81365966796874,\n 36.912568282851964\n ],\n [\n -121.75735473632812,\n 36.81038419804105\n ],\n [\n -121.78756713867189,\n 36.65079252503471\n ],\n [\n -121.87271118164062,\n 36.56811502180857\n ],\n [\n -121.981201171875,\n 36.54715598643371\n ],\n [\n -122.14187622070311,\n 36.67062193440137\n ],\n [\n -122.20504760742186,\n 36.849955535919875\n ],\n [\n -122.13775634765625,\n 36.94440418245903\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"1","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5683bcbce4b0a04ef4925e57","contributors":{"authors":[{"text":"Ross, Donald C.","contributorId":146987,"corporation":false,"usgs":true,"family":"Ross","given":"Donald","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":583705,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Brabb, Earl E.","contributorId":48939,"corporation":false,"usgs":true,"family":"Brabb","given":"Earl","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":583706,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70160723,"text":"70160723 - 1973 - Geology of a system of submarine canyons south of Puerto Rico","interactions":[],"lastModifiedDate":"2015-12-29T14:19:47","indexId":"70160723","displayToPublicDate":"1973-03-01T01:15:00","publicationYear":"1973","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 of a system of submarine canyons south of Puerto Rico","docAbstract":"A strongly dendritic submarine canyon system with four major canyons occupies a 30-km indentation in the insular shelf off the south coast of Puerto Rico between Guanica and Ponce. Each canyon has several headward branches at depths of 100 to 1,100 m. Each of the five major rivers that reach the coast between Guanica and Ponce is opposite a canyon head, and off each of the rivers a channel 20 to 30 m deep is incised into the insular shelf. The entire canyon system is 40 km long and terminates at a depth of about 3.3 km; no fan or other constructional feature appears to have been formed. A 410-km continuous seismic profiling survey shows that three unconformable stratigraphic units underlie the canyon area. One sample of indurated clay of probable Miocene age was dredged from a canyon-wall outcrop
of the middle stratigraphic unit. The three stratigraphic units may be roughly correlative with (in ascending order) the Juana Diaz Formation,
the Ponce Limestone, and an unnamed upper section found in a nearby drill hole ashore. Canyon-axis sediment at depths of 700 to 2,200 m is entirely of pelagic origin, indicating that sediment is not now being transported down the canyons.
The spectrochemical method described herein for determining trace, minor, and major element distribution in native gold is applicable over a wide range of particle sizes and over a very large concentration range. The matrices of samples and standards are very closely matched. The method was tested on 100 nuggets from a gold sample collected in Alaska. The data show that the method is adequate for 30 of the 31 elements checked; only the mercury values are not acceptable. The data also show that more than one sample is necessary for a complete evaluation of all elements in one geologic location.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Sutton, A., Havens, R., and Sainsbury, C., 1973, A spectrochemical method for determining the composition of native gold: Journal of Research of the U.S. Geological Survey, v. 1, no. 3, p. 301-307.","productDescription":"7 p.","startPage":"301","endPage":"307","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":312999,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":312998,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1973/vol1issue3/report.pdf","text":"Report","size":"23.61. MB","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States of America","state":"Alaska","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -140.888671875,\n 70.11048478105927\n ],\n [\n -158.90625,\n 71.80141030136785\n ],\n [\n -168.3984375,\n 68.52823492039876\n ],\n [\n -168.3984375,\n 56.46249048388979\n ],\n [\n -177.626953125,\n 53.27835301753182\n ],\n [\n -177.45117187499997,\n 50.3454604086048\n ],\n [\n -156.796875,\n 54.97761367069625\n ],\n [\n -148.271484375,\n 59.085738569819505\n ],\n [\n -139.921875,\n 59.31076795603884\n ],\n [\n -133.76953125,\n 53.014783245859235\n ],\n [\n -128.759765625,\n 56.072035471800866\n ],\n [\n -135.87890625,\n 60.673178565817715\n ],\n [\n -140.09765625,\n 60.930432202923335\n ],\n [\n -140.888671875,\n 70.11048478105927\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"1","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5683bcbae4b0a04ef4925e47","contributors":{"authors":[{"text":"Sutton, A.L.","contributorId":83146,"corporation":false,"usgs":true,"family":"Sutton","given":"A.L.","email":"","affiliations":[],"preferred":false,"id":583688,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Havens, R.G.","contributorId":65889,"corporation":false,"usgs":true,"family":"Havens","given":"R.G.","email":"","affiliations":[],"preferred":false,"id":583689,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sainsbury, C.L.","contributorId":99968,"corporation":false,"usgs":true,"family":"Sainsbury","given":"C.L.","email":"","affiliations":[],"preferred":false,"id":583690,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70179368,"text":"70179368 - 1973 - Summary of ground-water hydrological data in Michigan for 1971","interactions":[],"lastModifiedDate":"2016-12-29T14:03:28","indexId":"70179368","displayToPublicDate":"1973-03-01T00:00:00","publicationYear":"1973","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":6,"text":"USGS Unnumbered Series"},"seriesTitle":{"id":375,"text":"Open-File Report","active":false,"publicationSubtype":{"id":6}},"title":"Summary of ground-water hydrological data in Michigan for 1971","docAbstract":"No abstract available.
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Research of the U.S. Geological Survey","active":true,"publicationSubtype":{"id":10}},"title":"A rapid method for the determination of radioactive cesium isotopes in water","docAbstract":"Radioactive cesium in water is concentrated by ion-exchange on finely divided ammonium hexacyanocobalt ferrate (NCFC), and then determined by beta counting. No carrier is added, and the method can be used to determine beta-emitting cesium isotopes at the 10-pCi/l level using a 100-ml sample. Five samples can be prepared for counting, in approximately 3 hours, and the method is applicable to fresh and saline waters.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","usgsCitation":"Janzer, V., 1973, A rapid method for the determination of radioactive cesium isotopes in water: Journal of Research of the U.S. Geological Survey, v. 1, no. 1, p. 113-115.","productDescription":"3 p.","startPage":"113","endPage":"115","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":307477,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":307476,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/journal/1973/vol1issue1/report.pdf","text":"Report","linkFileType":{"id":1,"text":"pdf"},"description":"Report"}],"volume":"1","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55dd91abe4b0518e354dd110","contributors":{"authors":[{"text":"Janzer, V.J.","contributorId":31777,"corporation":false,"usgs":true,"family":"Janzer","given":"V.J.","affiliations":[],"preferred":false,"id":569935,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70207210,"text":"70207210 - 1973 - Ground water in perspective","interactions":[],"lastModifiedDate":"2019-12-13T07:40:55","indexId":"70207210","displayToPublicDate":"1973-02-28T09:55:12","publicationYear":"1973","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2126,"text":"JAWRA","active":true,"publicationSubtype":{"id":10}},"title":"Ground water in perspective","docAbstract":"Owing to their enormous capacity, ground‐water reservoirs are at least equal in importance to the ground water itself. As regulators of water movement in the hydrological cycle, these reservoirs surpass all lakes combined, natural and manmade. While many aquifers are not well understood, data on many others are adequate for long‐range broad‐scale planning. An example is the basalt aquifer of the Snake River Plain in Idaho. However, the area has managerial problems which concern the time, the place and the feasibility of manipulations of water. All continents of the world contain great aquifers. For every huge aquifer, however, hundreds of smaller ones occur, and even these contain astonishing amounts of water. Aquifers in the Ohio River Basin of the United States are good examples. Management of total water resources is a difficult problem at many places. But many problems could be met and many water shortages alleviated or eliminated by use of aquifers, not merely as sources of water, but as reservoirs for management of water.
","language":"English","publisher":"Wiley","doi":"10.1111/j.1752-1688.1973.tb01707.x","issn":"1093474X","usgsCitation":"Nace, R.L., 1973, Ground water in perspective: JAWRA, v. 9, no. 1, p. 18-24, https://doi.org/10.1111/j.1752-1688.1973.tb01707.x.","productDescription":"7 p.","startPage":"18","endPage":"24","costCenters":[],"links":[{"id":370204,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States ","state":"Idaho, Wyoming, Montana, Oregon","otherGeospatial":"Snake River Plain ","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"type\": \"Polygon\",\n \"coordinates\": [\n [\n [\n -117.26806640625,\n 47.62097541515849\n ],\n [\n -120.08056640625,\n 44.94924926661153\n ],\n [\n -121.1572265625,\n 44.26093725039923\n ],\n [\n -119.61914062499999,\n 43.89789239125797\n ],\n [\n -116.21337890625,\n 43.24520272203356\n ],\n [\n -114.12597656249999,\n 42.97250158602597\n ],\n [\n -111.73095703125,\n 44.11914151643737\n ],\n [\n -111.29150390625,\n 42.5530802889558\n ],\n [\n -109.27001953125,\n 42.08191667830631\n ],\n [\n -108.3251953125,\n 42.69858589169842\n ],\n [\n -107.666015625,\n 43.43696596521823\n ],\n [\n -108.65478515625,\n 44.731125592643274\n ],\n [\n -109.77539062499999,\n 46.14939437647686\n ],\n [\n -110.36865234374999,\n 47.68018294648414\n ],\n [\n -112.19238281249999,\n 48.04870994288686\n ],\n [\n -117.26806640625,\n 47.62097541515849\n ]\n ]\n ]\n }\n }\n ]\n}","volume":"9","issue":"1","noUsgsAuthors":false,"publicationDate":"2007-06-08","publicationStatus":"PW","contributors":{"authors":[{"text":"Nace, R. L.","contributorId":11332,"corporation":false,"usgs":true,"family":"Nace","given":"R.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":777277,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70241588,"text":"70241588 - 1973 - Contrasting compositions of the youngest Columbia River basalt flows in Union and Wallowa Counties, northeastern Oregon","interactions":[],"lastModifiedDate":"2023-03-23T20:05:42.157493","indexId":"70241588","displayToPublicDate":"1973-02-01T14:59:22","publicationYear":"1973","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Contrasting compositions of the youngest Columbia River basalt flows in Union and Wallowa Counties, northeastern Oregon","docAbstract":"Note: This paper is dedicated to Aaron and Elizabeth Waters on the occasion of Dr. Waters' retirement.
Several new chemical analyses of flows confined to a structural downwarp in northeastern Oregon indicate the first reported occurrence of Late-Yakima–type basalt in the region and the close stratigraphic association of Yakima–type and Late-Yakima–type flows, as well as andesite. The andesite is the most silicic flow rock yet found on the Columbia Plateau.
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George W.","contributorId":101308,"corporation":false,"usgs":true,"family":"Walker","given":"George","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":867393,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70241801,"text":"70241801 - 1973 - Ironside Mountain, Oregon: A late Tertiary volcanic and structural enigma","interactions":[],"lastModifiedDate":"2023-03-27T23:50:15.45904","indexId":"70241801","displayToPublicDate":"1973-02-01T14:51:54","publicationYear":"1973","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Ironside Mountain, Oregon: A late Tertiary volcanic and structural enigma","docAbstract":"Note: This paper is dedicated to Aaron and Elizabeth Waters on the occasion of Dr. Waters' retirement.
Ironside Mountain is a 6- by 10-km block of folded rhyolite, andesite, and basalt flows of the Strawberry Volcanics bounded by a horse-shoe-shaped reverse fault and surrounded by Mesozoic rocks. The toe of the horseshoe points northeast; the fault dips outward at angles of 45° to 90°, has a minimum displacement of 600 m at the toe, and dies out or is buried at the open southwest end. Flows are folded to vertical in a crosswise anticline at the northeast end, and in a synclinal structure along the southwest edge. Local unconformities and thickening of flows in a small basin show that some deformation accompanied volcanism, which has been dated as late Miocene and early Pliocene. No centers of eruption have been identified within the Horseshoe fault.
The Ironside Mountain block seems to be a unique expression of cross folding in the region. The northwest-striking Mine Ridge–Ironside anticline follows the main regional trend, and is faulted where two large down-warps strike into it from the northeast. The Ironside Mountain structure is interpreted as being a transverse compressional feature in which opposing reverse faults took the place of anticlinal folding, directly on strike with a syncline to the northeast. A horst of pre-Tertiary rocks, which has been raised at least 600 m, crosses the axes of the abutting structures; the nose of the Horseshoe fault bounds one side of it, and a range-border fault bounds the other. Cross faults, of which we found only one, are believed to have facilitated arching and longitudinal shortening within the horst.
","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1973)84<489:IMOALT>2.0.CO;2","usgsCitation":"Thayer, T.P., and Brown, C., 1973, Ironside Mountain, Oregon: A late Tertiary volcanic and structural enigma: Geological Society of America Bulletin, v. 84, no. 2, p. 489-498, https://doi.org/10.1130/0016-7606(1973)84<489:IMOALT>2.0.CO;2.","productDescription":"10 p.","startPage":"489","endPage":"498","costCenters":[],"links":[{"id":414787,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Oregon","otherGeospatial":"Ironside Mountain","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -118.18160932935716,\n 44.233631068491576\n ],\n [\n -118.18302639199901,\n 44.22900445430088\n ],\n [\n -118.19989722330686,\n 44.21621129767192\n ],\n [\n -118.19715080890794,\n 44.212133773514864\n ],\n [\n -118.18341873691341,\n 44.20313410045384\n ],\n [\n -118.17439480388823,\n 44.19736796229702\n ],\n [\n -118.15497373063829,\n 44.19511760896091\n ],\n [\n -118.14928472938327,\n 44.20060269465583\n ],\n [\n -118.1477153497268,\n 44.20833720412668\n ],\n [\n -118.13888758915886,\n 44.21339924226024\n ],\n [\n -118.12044737819454,\n 44.22310026591748\n ],\n [\n -118.09882455247461,\n 44.22899247783127\n ],\n [\n -118.08156137625272,\n 44.23573939793468\n ],\n [\n -118.06214030300275,\n 44.242626081049764\n ],\n [\n -118.05331254243481,\n 44.24740412216994\n ],\n [\n -118.04703502380856,\n 44.253305872455\n ],\n [\n -118.03232208952876,\n 44.26173591698992\n ],\n [\n -118.03016419250069,\n 44.277468766444144\n ],\n [\n -118.03781491832659,\n 44.30344683915166\n ],\n [\n -118.05645130174813,\n 44.30442956764213\n ],\n [\n -118.07920730676781,\n 44.306535359012685\n ],\n [\n -118.09117382664908,\n 44.30330644802419\n ],\n [\n -118.09764751773224,\n 44.29825214384144\n ],\n [\n -118.11314514184045,\n 44.291371975096325\n ],\n [\n -118.11432217658289,\n 44.288282657535945\n ],\n [\n -118.12138438503754,\n 44.28238441824578\n ],\n [\n -118.12805424857783,\n 44.28238441824578\n ],\n [\n -118.13060449051954,\n 44.27718785963401\n ],\n [\n -118.13492028457529,\n 44.27578330543784\n ],\n [\n -118.13766669897421,\n 44.27185037508181\n ],\n [\n -118.14198249302959,\n 44.2707266323504\n ],\n [\n -118.15689159976657,\n 44.26145493497711\n ],\n [\n -118.17847057004421,\n 44.24318822367795\n ],\n [\n -118.18160932935716,\n 44.233631068491576\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"84","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Thayer, T. P.","contributorId":64629,"corporation":false,"usgs":true,"family":"Thayer","given":"T.","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":867764,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Brown, C. Ervin","contributorId":58616,"corporation":false,"usgs":true,"family":"Brown","given":"C. Ervin","affiliations":[],"preferred":false,"id":867765,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70241800,"text":"70241800 - 1973 - Petrology of Newberry Volcano, central Oregon","interactions":[],"lastModifiedDate":"2023-03-27T19:48:30.379078","indexId":"70241800","displayToPublicDate":"1973-02-01T14:39:12","publicationYear":"1973","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Petrology of Newberry Volcano, central Oregon","docAbstract":"Note: This paper is dedicated to Aaron and Elizabeth Waters on the occasion of Dr. Waters' retirement.
The eastern flank of the central and southern Cascade Mountains is bordered by a belt of shield volcanoes that appears to be a subprovince of the Oregon high-alumina plateau basalt petrologic province. Most of the volcanoes in this belt are low shields in which differentiation from the parent high-alumina basalt magma has been relatively slight, but several are large complex shield centers where differentiation has been extreme. The location of these large centers, and of some of the smaller volcanoes as well, was largely determined by intersecting concentrations of faults and fault-fissures of three regional fault systems.
One of the largest of the complex volcanic centers is Newberry Volcano in central Oregon, a shield volcano with a big caldera at its summit. The stratigraphy of the caldera walls and of features on the caldera floor at Newberry allows detailed interpretation of the history of the younger parts of the volcano and caldera. The formation of Newberry Caldera was apparently a slow process controlled largely by faulting along the three regional fault systems. The magma conduits were probably a gridlike plexus of intersecting dikes and fissures, with larger “magma pockets” at the grid intersections. The magma was trapped in shallow chambers and periodically released by faulting. The entrapment of the magma allowed differentiation in the shallow chambers.
The stratigraphy and petrology of the wall sequence also allows determination of the relative time at which the caldera had grown large enough to hold a caldera lake.
On differentiation plots, chemical analyses of the Newberry rocks show two trends: rocks erupted before the presence of a lake in the caldera trend toward slight iron enrichment, whereas rocks erupted after water was present in the caldera generally trend toward alkali enrichment. These different trends are attributed to differences in the oxygen fugacity of the magma which, in turn, are related to the presence or absence of large volumes of water in the caldera lake. The interpretation is supported by field, petrographic, petrologic, chemical, trace-element, and isotopic data. Plots of existing data for the Medicine Lake Highland Volcano, another large complex shield center in the belt, show the same type of two-trend relation as those of Newberry Volcano.
","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1973)84<455:PONVCO>2.0.CO;2","usgsCitation":"Higgins, M.W., 1973, Petrology of Newberry Volcano, central Oregon: Geological Society of America Bulletin, v. 84, no. 2, p. 455-487, https://doi.org/10.1130/0016-7606(1973)84<455:PONVCO>2.0.CO;2.","productDescription":"33 p.","startPage":"455","endPage":"487","costCenters":[],"links":[{"id":414786,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Oregon","otherGeospatial":"Newberry Volcano","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -121.31542595924863,\n 43.671896153864395\n ],\n [\n -121.24807825316685,\n 43.65385159170725\n ],\n [\n -121.15578695224004,\n 43.682118998227196\n ],\n [\n -121.12336027894165,\n 43.7061658794388\n ],\n [\n -121.14082079533293,\n 43.7518283877308\n ],\n [\n -121.16992165598549,\n 43.787252910984904\n ],\n [\n -121.25639278478187,\n 43.80225697343542\n ],\n [\n -121.2979654428569,\n 43.780649930066716\n ],\n [\n -121.32290903770196,\n 43.72058937968043\n ],\n [\n -121.31542595924863,\n 43.671896153864395\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"84","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Higgins, Michael W.","contributorId":12459,"corporation":false,"usgs":true,"family":"Higgins","given":"Michael","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":867763,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70241704,"text":"70241704 - 1973 - Geochronology of Precambrian rocks of the Teton Range, Wyoming","interactions":[],"lastModifiedDate":"2023-03-24T17:35:46.661924","indexId":"70241704","displayToPublicDate":"1973-02-01T12:15:58","publicationYear":"1973","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Geochronology of Precambrian rocks of the Teton Range, Wyoming","docAbstract":"Note: This paper is dedicated to Aaron and Elizabeth Waters on the occasion of Dr. Waters' retirement.
The oldest rocks in the Teton Range are complexly deformed interlayered biotite gneiss, plagioclase gneiss, amphibole gneiss, and amphibolite. Also, within these rocks, there are concordant bodies of strongly lineated quartz monzonite gneiss, here named the Webb Canyon Gneiss, which may be of volcanic origin. Coarse metagabbro, here named the Rendezvous Metagabbro, is intrusive into the layered gneiss sequence and was metamorphosed and deformed along with the enclosing rocks.
These older rocks are cut by discordant plutons and swarms of undeformed dikes of quartz monzonite and associated pegmatite. The quartz monzonite, which makes up much of the central part of the Teton Range, is here named the Mount Owen Quartz Monzonite.
The youngest Precambrian rocks are undeformed dikes of slightly metamorphosed tholeiitic diabase.
A Rb-Sr whole-rock isochron on the Webb Canyon Gneiss and the Rendezvous Metagabbro indicates that these rocks were metamorphosed 2,875 ± 150 m.y. ago. The initial Sr. ratio of 0.700 suggests that the original rocks are probably not significantly older than the metamorphism. The Mount Owen Quartz Monzonite has a whole-rock isochron age of 2,495 ± 75 m.y. and an unusually high initial ratio of 0.732. Plagioclase-microcline isochrons from two samples of the quartz monzonite indicate partial re-equilibration of the Rb-Sr system during a thermal event 1,800 m.y. ago.
The age of the diabase dikes has not been definitely determined, but biotite in the wall rocks of one major dike has a K-Ar age of 1,450 m.y. This suggests that the dike was emplaced during or prior to a thermal event 1,300 to 1,500 m.y. ago that was responsible for resetting many of the previously reported K-Ar mineral ages throughout the range.
The geochronologic record in the Teton Range is very similar to that elsewhere in the Wyoming Precambrian province. Major metamorphic events with ages between 2,700 and 2,900 m.y. have been identified in the Bighorn, Beartooth, Little Belt, and Granite Mountains. Post-tectonic granitic rocks with ages of 2,500 to 2,700 m.y. have been found in the Wind River Range and the Granite Mountains. Later thermal events have affected Rb-Sr systematics of rocks in the Beartooth Mountains, Wind River Range, and Granite Mountains, as well as in the Teton Range at about the same time as major episodes of regional metamorphism in terranes flanking the Wyoming province in southwestern Montana and in the Front Range in Colorado.
","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1973)84<561:GOPROT>2.0.CO;2","usgsCitation":"Reed, J.C., and Zartman, R., 1973, Geochronology of Precambrian rocks of the Teton Range, Wyoming: Geological Society of America Bulletin, v. 84, no. 2, p. 561-582, https://doi.org/10.1130/0016-7606(1973)84<561:GOPROT>2.0.CO;2.","productDescription":"22 p.","startPage":"561","endPage":"582","costCenters":[],"links":[{"id":414712,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Wyoming","otherGeospatial":"Teton Range","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -110.84537434997902,\n 43.502379861642595\n ],\n [\n -110.7349727362824,\n 43.685697211227364\n ],\n [\n -110.7107382357151,\n 43.845156242838044\n ],\n [\n -110.67304012372105,\n 43.979005826657925\n ],\n [\n -110.73766545856788,\n 44.14347912047279\n ],\n [\n -110.94231235224892,\n 44.12415303704091\n ],\n [\n -111.017708576237,\n 43.98481854482057\n ],\n [\n -111.04194307680432,\n 43.83738761553414\n ],\n [\n -111.02578674309277,\n 43.75964570842382\n ],\n [\n -111.10656841165111,\n 43.6058083095117\n ],\n [\n -111.07156302194257,\n 43.549237376713535\n ],\n [\n -110.92615601853738,\n 43.49065979580564\n ],\n [\n -110.84537434997902,\n 43.502379861642595\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"84","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Reed, John C. Jr.","contributorId":223980,"corporation":false,"usgs":false,"family":"Reed","given":"John","suffix":"Jr.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":867548,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Zartman, R. E.","contributorId":15632,"corporation":false,"usgs":true,"family":"Zartman","given":"R. E.","affiliations":[],"preferred":false,"id":867549,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":70241694,"text":"70241694 - 1973 - Reconnaissance study of the strontium isotopic composition of Cenozoic volcanic rocks in the northwestern Great Basin","interactions":[],"lastModifiedDate":"2023-03-24T17:04:22.972133","indexId":"70241694","displayToPublicDate":"1973-02-01T11:39:31","publicationYear":"1973","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Reconnaissance study of the strontium isotopic composition of Cenozoic volcanic rocks in the northwestern Great Basin","docAbstract":"Sixteen mafic and intermediate lava flows of Eocene to Pleistocene age from the northwestern Great Basin have initial Sr87/Sr86 ratios of from 0.7029 to 0.7047. Seven upper Miocene mafic and intermediate lava flows have initial ratios of from 0.7037 to 0.7041, suggesting a common source for the Steens Basalt and contemporaneous rocks of the northwestern Great Basin. Values of 0.7047 and 0.7033 obtained on olivine basalts of early Miocene and Quaternary ages, respectively, suggest that these lavas were derived from different source materials than were the late Miocene rocks. Unusually low values of 0.7029 obtained on two specimens of andesite from the Eocene Cedarville Series of Russell (1928) suggest that these lava flows were derived from still another source material.
Ten silicic volcanic rocks, most from widespread and voluminous ash-flow sheets and lava complexes, have initial ratios of approximately 0.7023 to 0.7057. Some of the more radiogenic values, obtained on very highly differentiated and strontium-poor rock units, provide only an upper limit for the initial Sr87/Sr86 ratios of the parent magmas. The close similiarity of the strontium isotopic composition of the silicic rocks to those of spatially and temporally associated intermediate lavas supports the concept that the widespread Miocene silicic volcanic rocks of the northwestern Great Basin were produced by the fractional crystallization of enormous volumes of mantle-derived mafic magma. The data also provide indirect support for the interpretation that the relatively radiogenic character of many salic volcanic rocks from other parts of the Great Basin largely reflects the presence of an unusually radiogenic mantle rather than the involvement of crustal material.
","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1973)84<1393:RSOTSI>2.0.CO;2","usgsCitation":"Noble, D.C., Hedge, C.E., McKee, E.H., and Korringa, M.K., 1973, Reconnaissance study of the strontium isotopic composition of Cenozoic volcanic rocks in the northwestern Great Basin: Geological Society of America Bulletin, v. 84, no. 4, p. 1393-1405, https://doi.org/10.1130/0016-7606(1973)84<1393:RSOTSI>2.0.CO;2.","productDescription":"13 p.","startPage":"1393","endPage":"1405","costCenters":[],"links":[{"id":414711,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California, Idaho, Nevada, Oregon","otherGeospatial":"Great Basin","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -121.65478492913951,\n 38.17845616861152\n ],\n [\n -116.57625843904941,\n 38.17845616861152\n ],\n [\n -116.57625843904941,\n 43.2049720572158\n ],\n [\n -121.65478492913951,\n 43.2049720572158\n ],\n [\n -121.65478492913951,\n 38.17845616861152\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"84","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Noble, Donald C.","contributorId":64676,"corporation":false,"usgs":true,"family":"Noble","given":"Donald","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":867544,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hedge, Carl E.","contributorId":76299,"corporation":false,"usgs":true,"family":"Hedge","given":"Carl","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":867545,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"McKee, Edwin H. mckee@usgs.gov","contributorId":3728,"corporation":false,"usgs":true,"family":"McKee","given":"Edwin","email":"mckee@usgs.gov","middleInitial":"H.","affiliations":[],"preferred":true,"id":867546,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Korringa, Marjorie K.","contributorId":303477,"corporation":false,"usgs":false,"family":"Korringa","given":"Marjorie","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":867547,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":70241690,"text":"70241690 - 1973 - Pahoehoe flows from the 1969–1971 Mauna Ulu eruption, Kilauea Volcano, Hawaii","interactions":[],"lastModifiedDate":"2023-03-24T16:34:43.300985","indexId":"70241690","displayToPublicDate":"1973-02-01T11:26:22","publicationYear":"1973","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Pahoehoe flows from the 1969–1971 Mauna Ulu eruption, Kilauea Volcano, Hawaii","docAbstract":"Note: This paper is dedicated to Aaron and Elizabeth Waters on the occasion of Dr. Waters' retirement.
Three types of chemically similar pahoehoe flows were observed to form during the 1969–1971 Mauna Ulu eruption. (1) A cavernous type called shelly pahoehoe, characterized by fragile gas cavities, small tubes, and buckled fragments of surface crust, was deposited when gas-charged lava welled out of the source fissure with little or no accompanying fountaining. (2) A comparatively smooth-surfaced, dense type, characterized by surface channels and only a few large cavities, formed from voluminous flows of partly degassed fallout away from the foot of lava fountains more than 100 m high. (3) A relatively dense type, characterized by hummocky surfaces with abundant low tumuli and overlapping pahoehoe toes and lobes, formed when largely degassed lava issued from tubes after flowing underground for several kilometers or more. Shelly pahoehoe is rarely found in the geologic record, but the other two types occur commonly. These three types of pahoehoe, which are completely intergradational, can be related qualitatively to the relative gas content and mode of flowage of the lava. The present surface of Kilauea is underlain mostly by hummocky, tube-fed pahoehoe.
","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1973)84<615:PFFTMU>2.0.CO;2","usgsCitation":"Swanson, D., 1973, Pahoehoe flows from the 1969–1971 Mauna Ulu eruption, Kilauea Volcano, Hawaii: Geological Society of America Bulletin, v. 84, no. 2, p. 615-626, https://doi.org/10.1130/0016-7606(1973)84<615:PFFTMU>2.0.CO;2.","productDescription":"12 p.","startPage":"615","endPage":"626","costCenters":[],"links":[{"id":414710,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Hawai'i","otherGeospatial":"Kilauea Volcano","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -155.2984910854643,\n 19.411226251025127\n ],\n [\n -155.29922015737213,\n 19.40314640156471\n ],\n [\n -155.29028902650055,\n 19.396785386664774\n ],\n [\n -155.272791300711,\n 19.399879965518124\n ],\n [\n -155.2545645030136,\n 19.40778806627671\n ],\n [\n -155.244357496303,\n 19.40847570904171\n ],\n [\n -155.237978117109,\n 19.40864761927881\n ],\n [\n -155.23670224127002,\n 19.413117221649344\n ],\n [\n -155.24217028057927,\n 19.418618102041762\n ],\n [\n -155.25365316312863,\n 19.42480636994776\n ],\n [\n -155.25893893446093,\n 19.432369488426914\n ],\n [\n -155.26914594117153,\n 19.432369488426914\n ],\n [\n -155.27862387597423,\n 19.433228911425957\n ],\n [\n -155.28427418326038,\n 19.425493940723797\n ],\n [\n -155.29539252985575,\n 19.419133800034004\n ],\n [\n -155.2984910854643,\n 19.411226251025127\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"84","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Swanson, Donald A. 0000-0002-1680-3591","orcid":"https://orcid.org/0000-0002-1680-3591","contributorId":229682,"corporation":false,"usgs":true,"family":"Swanson","given":"Donald A.","affiliations":[],"preferred":true,"id":867543,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70241536,"text":"70241536 - 1973 - Zircon fission-track ages of Pearlette family ash beds in Meade County, Kansas","interactions":[],"lastModifiedDate":"2023-03-22T16:18:45.068915","indexId":"70241536","displayToPublicDate":"1973-02-01T11:12:36","publicationYear":"1973","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1796,"text":"Geology","active":true,"publicationSubtype":{"id":10}},"title":"Zircon fission-track ages of Pearlette family ash beds in Meade County, Kansas","docAbstract":"Pearlette family volcanic ash beds at two faunally important late Cenozoic localities near Meade, Meade County, Kansas, are very similar in chemical and mineralogic composition, yet their zircon microphenocrysts have markedly different fission-track ages. Zircon microphenocrysts from type B Pearlette volcanic ash underlying sediments that contain the Borchers local fauna of Hibbard are various shades of pink and have a fission-track age of 1.9 ± 0.1 m.y. In contrast, zircon microphenocrysts from type O Pearlette volcanic ash overlying sediments that contain the Cudahy local fauna of Hibbard are colorless and have a fission-track age of 0.6 ± 0.1 m.y. These fission-track ages are in good agreement with K-Ar ages on the probable source material in Yellowstone National Park.
","language":"English","publisher":"Geological Society of America","doi":"10.1130/0091-7613(1973)1<93:ZFAOPF>2.0.CO;2","usgsCitation":"Naeser, C.W., Izett, G.A., and Wilcox, R.E., 1973, Zircon fission-track ages of Pearlette family ash beds in Meade County, Kansas: Geology, v. 1, no. 2, p. 93-95, https://doi.org/10.1130/0091-7613(1973)1<93:ZFAOPF>2.0.CO;2.","productDescription":"3 p.","startPage":"93","endPage":"95","costCenters":[],"links":[{"id":414554,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Kansas","county":"Meade County","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"id\":945,\"properties\":{\"name\":\"Meade\",\"state\":\"KS\"},\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-100.217,37.4758],[-100.1068,37.4751],[-100.106,37.3862],[-100.0898,37.3855],[-100.0902,36.9983],[-100.1079,36.9983],[-100.6337,36.9986],[-100.635,37.3881],[-100.6518,37.3878],[-100.652,37.4757],[-100.217,37.4758]]]}}]}","volume":"1","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Naeser, C. W.","contributorId":17582,"corporation":false,"usgs":true,"family":"Naeser","given":"C.","middleInitial":"W.","affiliations":[],"preferred":false,"id":867143,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Izett, Glen A.","contributorId":83790,"corporation":false,"usgs":true,"family":"Izett","given":"Glen","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":867144,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wilcox, Ray E.","contributorId":63074,"corporation":false,"usgs":true,"family":"Wilcox","given":"Ray","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":867145,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70241535,"text":"70241535 - 1973 - Hybrid origin of the absarokite-shoshonite-banakite Series, Absaroka Volcanic Field, Wyoming","interactions":[],"lastModifiedDate":"2023-03-22T15:56:28.59669","indexId":"70241535","displayToPublicDate":"1973-02-01T10:41:48","publicationYear":"1973","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Hybrid origin of the absarokite-shoshonite-banakite Series, Absaroka Volcanic Field, Wyoming","docAbstract":"Textural and mineralogical features of potash-rich basaltic rocks of the absarokite-shoshonite-banakite series strongly suggest that most of the large crystals and aggregates in these rocks are xenocrysts and microxenoliths, not true phenocrysts as was previously thought. A hybrid origin, involving assimilation of gabbro by high-temperature syenitic magma, is proposed.
","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1973)84<697:HOOTAS>2.0.CO;2","usgsCitation":"Prostka, H.J., 1973, Hybrid origin of the absarokite-shoshonite-banakite Series, Absaroka Volcanic Field, Wyoming: Geological Society of America Bulletin, v. 84, no. 2, p. 697-701, https://doi.org/10.1130/0016-7606(1973)84<697:HOOTAS>2.0.CO;2.","productDescription":"5 p.","startPage":"697","endPage":"701","costCenters":[],"links":[{"id":414553,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Wyoming","otherGeospatial":"Absaroka Volcanic Field","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -110.48350186874559,\n 43.80422294224638\n ],\n [\n -110.02947087882127,\n 43.7328048224457\n ],\n [\n -109.20232531301743,\n 43.46259612336715\n ],\n [\n -108.92361322019237,\n 43.550628495855875\n ],\n [\n -108.74829432309257,\n 43.787999039408305\n ],\n [\n -109.02700641591763,\n 44.07612581029548\n ],\n [\n -109.16186710599476,\n 44.12454903383494\n ],\n [\n -109.01801570324629,\n 44.30497863259859\n ],\n [\n -109.08544604828458,\n 44.401409927529386\n ],\n [\n -109.0719599792765,\n 44.516918022569286\n ],\n [\n -109.22480209469686,\n 44.73447648442601\n ],\n [\n -109.17535317500233,\n 45.00845621118697\n ],\n [\n -110.65432540950971,\n 44.99256286793869\n ],\n [\n -110.65432540950971,\n 44.82063383612166\n ],\n [\n -110.37111796034841,\n 44.58739380863548\n ],\n [\n -110.25873405195127,\n 44.42067714523816\n ],\n [\n -110.22726655759996,\n 44.32106153406011\n ],\n [\n -110.348641178669,\n 44.30819556548937\n ],\n [\n -110.57340899546386,\n 44.33714002800821\n ],\n [\n -110.71276504187611,\n 44.1213220527832\n ],\n [\n -110.65432540950971,\n 43.95974827290979\n ],\n [\n -110.48350186874559,\n 43.80422294224638\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"84","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Prostka, Harold J.","contributorId":52185,"corporation":false,"usgs":true,"family":"Prostka","given":"Harold","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":867142,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":70241679,"text":"70241679 - 1973 - Miocene tholeiitic basalts of coastal Oregon and Washington and their relations to coeval basalts of the Columbia Plateau","interactions":[],"lastModifiedDate":"2023-03-24T15:45:43.966394","indexId":"70241679","displayToPublicDate":"1973-02-01T10:38:29","publicationYear":"1973","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Miocene tholeiitic basalts of coastal Oregon and Washington and their relations to coeval basalts of the Columbia Plateau","docAbstract":"Note: This paper is dedicated to Aaron and Elizabeth Waters on the occasion of Dr. Waters' retirement.
Tholeiitic basalt flows and breccias of Miocene age in western Oregon and Washington form three distinct stratigraphic units. Each unit was erupted from coastal vents marked by dikes and sills of the same composition as associated extrusive rocks. The three coastal basalt units are interbedded with predominantly marine sedimentary rocks of middle to late Miocene age. These units are here named, from older to younger, the Depoe Bay Basalt, Cape Foulweather Basalt, and basalt of Pack Sack Lookout. The three units can be distinguished by their petrographic characteristics. The Depoe Bay Basalt is nonporphyritic; Cape Foulweather Basalt has sparse large labradorite phenocrysts; and Pack Sack basalt has labradorite phenocrysts with numerous pyroxene and glass inclusions as well as augite and olivine phenocrysts. Chemical analyses of basalts from these three units show that each has a distinct and uniform composition. The Depoe Bay Basalt is characterized by high SiO2 content; the Cape Foulweather Basalt has high content of total iron, TiO2, and P2O5; and Pack Sack basalt is marked by relatively high MgO and CaO content.
The Depoe Bay Basalt, Cape Foulweather Basalt, and basalt of Pack Sack Lookout on the coast occur in the same stratigraphic order and are essentially the same ages as three basalt units that erupted on the Columbia Plateau. The plateau-derived units are the Yakima and late-Yakima petrographic types of Waters (1961) and the Pomona flow of Schmincke (1967). The virtual identity in chemical composition of the Depoe Bay Basalt and Yakima-type basalt, the Cape Foulweather Basalt and the late-Yakima–type basalt, and the Pack Sack basalt and the Pomona basalt flow indicate that each pair is consanguineous.
Fissure vents for the plateau basalt are located in eastern Oregon and Washington and western Idaho more than 500 km east of the coastal vent areas. Thus, a regional mechanism of magma generation or emplacement is required. Three models of magma genesis considered in this report are: (1) partial melting of the subducted Juan de Fuca plate; (2) partial melting along a nearly horizontal shear zone at the base of the American plate; and (3) partial melting within the asthenosphere and fractionation during ascent of the magma.
","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1973)84<387:MTBOCO>2.0.CO;2","usgsCitation":"Snavely, P., MacLeod, N.S., and Wagner, H.C., 1973, Miocene tholeiitic basalts of coastal Oregon and Washington and their relations to coeval basalts of the Columbia Plateau: Geological Society of America Bulletin, v. 84, no. 2, p. 387-424, https://doi.org/10.1130/0016-7606(1973)84<387:MTBOCO>2.0.CO;2.","productDescription":"38 p.","startPage":"387","endPage":"424","costCenters":[],"links":[{"id":414708,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Oregon, Washington","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -125.27714051017513,\n 46.64767251182491\n ],\n [\n -125.27714051017513,\n 43.583883983096456\n ],\n [\n -122.15260600009933,\n 43.583883983096456\n ],\n [\n -122.15260600009933,\n 46.64767251182491\n ],\n [\n -125.27714051017513,\n 46.64767251182491\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","volume":"84","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Snavely, Parke D. Jr.","contributorId":80328,"corporation":false,"usgs":true,"family":"Snavely","given":"Parke D.","suffix":"Jr.","affiliations":[],"preferred":false,"id":867534,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"MacLeod, Norman S.","contributorId":13643,"corporation":false,"usgs":true,"family":"MacLeod","given":"Norman","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":867535,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wagner, Holly C.","contributorId":55407,"corporation":false,"usgs":true,"family":"Wagner","given":"Holly","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":867536,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":70206955,"text":"70206955 - 1973 - Age of mineralization at Summitville, Colorado, as indicated by K-Ar dating of Alunite","interactions":[],"lastModifiedDate":"2019-12-02T06:57:49","indexId":"70206955","displayToPublicDate":"1973-01-31T19:23:47","publicationYear":"1973","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":" Age of mineralization at Summitville, Colorado, as indicated by K-Ar dating of Alunite","docAbstract":"No abstract available.
","language":"English","publisher":"Society of Economic Geologists","doi":"10.2113/gsecongeo.68.3.399","issn":" 03610128","usgsCitation":"Mehnert, H.H., Lipman, P.W., and Steven, T.A., 1973, Age of mineralization at Summitville, Colorado, as indicated by K-Ar dating of Alunite: Economic Geology, v. 68, no. 3, p. 399-401, https://doi.org/10.2113/gsecongeo.68.3.399.","productDescription":"3 p. 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