{"pageNumber":"6371","pageRowStart":"159250","pageSize":"25","recordCount":184689,"records":[{"id":70010320,"text":"70010320 - 1971 - Sea level as affected by river runoff, eastern United States","interactions":[],"lastModifiedDate":"2026-01-28T18:16:16.018233","indexId":"70010320","displayToPublicDate":"1971-07-30T00:00:00","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Sea level as affected by river runoff, eastern United States","docAbstract":"Variations in annual river inflow account for 7 to 21 percent of the total variation in average annual sea level along the Atlantic and Gulf of Mexico coasts of the United States. This compares with 29 to 68 percent of the total variation that can be attributed to the secular rise of sea level, and with 10 to 50 percent of the variation that cannot be attributed to either the river inflow or the secular rise.","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.173.3995.425","issn":"00368075","usgsCitation":"Meade, R., and Emery, K., 1971, Sea level as affected by river runoff, eastern United States: Science, v. 173, no. 3995, p. 425-428, https://doi.org/10.1126/science.173.3995.425.","productDescription":"4 p.","startPage":"425","endPage":"428","costCenters":[],"links":[{"id":219752,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"eastern United States","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -66.65248578907163,\n              45.07342418241919\n            ],\n            [\n              -70.17897709081237,\n              47.23802839847443\n            ],\n            [\n              -75.71671306662726,\n              39.24358970160954\n            ],\n            [\n              -77.80862793958916,\n              35.507587533655254\n            ],\n            [\n              -81.62457891500685,\n              32.80559142475942\n            ],\n            [\n              -84.33141504413013,\n              28.6483196177431\n            ],\n            [\n              -81.54623819942579,\n              24.622322996368446\n            ],\n            [\n              -76.58590211138896,\n              25.454697491315713\n            ],\n            [\n              -78.45374370178003,\n              31.626214597134172\n            ],\n            [\n              -66.65248578907163,\n              45.07342418241919\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"173","issue":"3995","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b87e5e4b08c986b3166f0","contributors":{"authors":[{"text":"Meade, R.H.","contributorId":27449,"corporation":false,"usgs":true,"family":"Meade","given":"R.H.","email":"","affiliations":[],"preferred":false,"id":358633,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Emery, K.O.","contributorId":67865,"corporation":false,"usgs":true,"family":"Emery","given":"K.O.","email":"","affiliations":[],"preferred":false,"id":358634,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":5221239,"text":"5221239 - 1971 - Eggshell thickness in mourning dove populations","interactions":[],"lastModifiedDate":"2025-02-21T16:22:02.80118","indexId":"5221239","displayToPublicDate":"1971-07-02T00:00:00","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Eggshell thickness in mourning dove populations","docAbstract":"<p>Eggs (<i>n</i> = 452) of the mourning dove (<i>Zenaidura macroura</i>) were collected from 9 states in 1969 and 11 states in 1970, and shell thickness was compared with that of eggs (<i>n</i> = 97) collected from 24 states during the years 1861 to 1935. Mean shell thickness did not differ significantly in the test groups.</p>","language":"English","publisher":"Wiley","doi":"10.2307/3799715","usgsCitation":"Kreitzer, J., 1971, Eggshell thickness in mourning dove populations: Journal of Wildlife Management, v. 35, no. 3, p. 563-564, https://doi.org/10.2307/3799715.","productDescription":"2 p.","startPage":"563","endPage":"564","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":194152,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","otherGeospatial":"conterminous United States","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"geometry\": {\n        \"type\": \"MultiPolygon\",\n        \"coordinates\": [\n          [\n            [\n              [\n                -94.81758,\n                49.38905\n              ],\n    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,{"id":5221240,"text":"5221240 - 1971 - Disappearance and persistence of aldrin after five annual applications","interactions":[],"lastModifiedDate":"2025-02-21T16:43:52.904104","indexId":"5221240","displayToPublicDate":"1971-07-02T00:00:00","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2508,"text":"Journal of Wildlife Management","active":true,"publicationSubtype":{"id":10}},"title":"Disappearance and persistence of aldrin after five annual applications","docAbstract":"<p>Investigation was initiated in 1965 to ascertain the disappearance rate of aldrin applied on loam soils at the recommended level of 1.5 lb per acre from 1960 through 1964. There was no further application of pesticides. Sampling began in 1965 and extended into 1970. Data from gas chromatographic analyses of soil and earthworm samples, collected spring and fall, showed that more than 95 percent of the pesticide had disappeared before the study began. There was no significant (P &gt; 0.05) reduction in aldrin plus dieldrin residues throughout 6 years of study. Similarly, residues in earthworms (<i>Allolobophora caligimosa</i>) failed to decline during the 6 years. Average combined residues for 11 semi-annual collection periods was 0.11 ppm in soils, 0.61 ppm in earthworms, wet-weight bases. Results showed that high levels of pesticide did not accumulate and remain in the soil as a result of annual applications and that a large part of applied aldrin had disappeared within 1 year. Earthworms contained 4 to 15 times (average 5.6) as much aldrin plus dieldrin as was found in soils.</p>","language":"English","publisher":"Wiley","doi":"10.2307/3799703","usgsCitation":"Korschgen, L., 1971, Disappearance and persistence of aldrin after five annual applications: Journal of Wildlife Management, v. 35, no. 3, p. 494-500, https://doi.org/10.2307/3799703.","productDescription":"7 p.","startPage":"494","endPage":"500","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":194312,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Missouri","county":"Saline County","otherGeospatial":"Marshall Junction Wildlife 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L.J.","contributorId":29910,"corporation":false,"usgs":true,"family":"Korschgen","given":"L.J.","email":"","affiliations":[],"preferred":false,"id":333369,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70227350,"text":"70227350 - 1971 - Potassium-argon Ages from the Pololu Volcanic Series, Kohala Volcano, Hawaii","interactions":[],"lastModifiedDate":"2022-01-10T22:09:38.488533","indexId":"70227350","displayToPublicDate":"1971-07-01T15:57:40","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5935,"text":"Bulletin of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Potassium-argon Ages from the Pololu Volcanic Series, Kohala Volcano, Hawaii","docAbstract":"<div class=\"article-section-wrapper js-article-section js-content-section  \"><p>Potassium-argon ages on five lava flows from the Pololu Volcanic Series, thought to be among the oldest rocks exposed on the island of Hawaii, indicate that the main subaerial shield-building phase of Kohala Volcano occurred about 0.7 ± 0.15 m.y. ago and that most of the island was formed within the past 0.7 m.y.</p></div>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1971)82[1997:PAFTPV]2.0.CO;2","usgsCitation":"Dalrymple, G.B., 1971, Potassium-argon Ages from the Pololu Volcanic Series, Kohala Volcano, Hawaii: Bulletin of the Geological Society of America, v. 82, no. 7, p. 1997-2000, https://doi.org/10.1130/0016-7606(1971)82[1997:PAFTPV]2.0.CO;2.","productDescription":"3 p.","startPage":"1997","endPage":"2000","costCenters":[],"links":[{"id":394155,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Hawaii","otherGeospatial":"Hawaii Island, Kohala Volcano, Pololu Volcanic Series","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -155.71648120880127,\n              20.07300284306698\n            ],\n            [\n              -155.71555852890015,\n              20.07386947337586\n            ],\n            [\n              -155.71620225906372,\n              20.075360872459783\n            ],\n            [\n              -155.71727514266968,\n              20.076207335898914\n            ],\n            [\n              -155.71916341781616,\n              20.077114255940558\n            ],\n            [\n              -155.72062253952026,\n              20.07683210360095\n            ],\n            [\n              -155.72210311889648,\n              20.075522103943392\n            ],\n            [\n              -155.72208166122437,\n              20.074494250394505\n            ],\n            [\n              -155.7208800315857,\n              20.07298268881677\n            ],\n            [\n              -155.7183051109314,\n              20.072418368758758\n            ],\n            [\n              -155.71648120880127,\n              20.07300284306698\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"82","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Dalrymple, G. Brent","contributorId":55146,"corporation":false,"usgs":true,"family":"Dalrymple","given":"G.","email":"","middleInitial":"Brent","affiliations":[],"preferred":false,"id":830547,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70227457,"text":"70227457 - 1971 - Contrasting behavior of P, Ti, and Nb in a differentiated high-alumina olivine tholeiite and a calc-alkaline andesitic suite","interactions":[],"lastModifiedDate":"2022-01-17T20:11:22.940381","indexId":"70227457","displayToPublicDate":"1971-07-01T13:58:41","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5935,"text":"Bulletin of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Contrasting behavior of P, Ti, and Nb in a differentiated high-alumina olivine tholeiite and a calc-alkaline andesitic suite","docAbstract":"<p>Crystallization differentiation in a low-K<sub>2</sub>O, high-Al<sub>2</sub>O<sub>3</sub><span>&nbsp;</span>olivine tholeiite (Hat Creek, California) yields segregation veins of basaltic andesite composition, and residual, interstitial glasses of dacite and rhyolite composition. P, Ti, and probably Nb, are progressively enriched in segregation veins and residual dacitic glass by crystallization of olivine, plagioclase, augite, and magnetite. P and Ti are depleted in residual rhyolitic glass by crystallization of magnetite, ilmenite, and apatite. By contrast, in a typical orogenic calc-alkaline suite (from Mount Jefferson, Oregon), P, Ti, and Nb are depleted with increasing K and Si. The most likely minerals capable of producing decreasing P, Ti, and Nb with increasing K are apatite, Fe-Ti oxides, amphibole, biotite, and sphene. There is no direct evidence of these minerals in Mount Jefferson basalt and andesite but they are present in calc-alkaline gabbro and tonalite and may occur at a shallow (crustal) depth beneath Mount Jefferson.</p><p>Alternatively, mixing of dacite-rhyolite with basalt-andesite may account for the Mount Jefferson trend. By physical and chemical analogy with segregation veins and residual interstitial glasses, basaltic andesite and dacite-rhyolite magmas may segregate from complementary rock at depth, and mix during ascent to the surface.</p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1971)82[1929:CBOPTA]2.0.CO;2","usgsCitation":"Anderson, A.T., and Gottfried, D., 1971, Contrasting behavior of P, Ti, and Nb in a differentiated high-alumina olivine tholeiite and a calc-alkaline andesitic suite: Bulletin of the Geological Society of America, v. 82, no. 7, p. 1929-1941, https://doi.org/10.1130/0016-7606(1971)82[1929:CBOPTA]2.0.CO;2.","productDescription":"13 p.","startPage":"1929","endPage":"1941","costCenters":[],"links":[{"id":394444,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California, Oregon","otherGeospatial":"Hat Creek, Mount Jefferson","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -121.45668983459471,\n              40.64548010364599\n            ],\n            [\n              -121.43866539001465,\n              40.66918118282895\n            ],\n            [\n              -121.42699241638182,\n              40.673477729435305\n            ],\n            [\n              -121.41634941101074,\n              40.68701655002505\n            ],\n            [\n              -121.42493247985838,\n              40.688513462301216\n            ],\n            [\n              -121.43832206726076,\n              40.67914093605057\n            ],\n            [\n              -121.46853446960448,\n              40.66755363075944\n            ],\n            [\n              -121.48097991943358,\n              40.654075973582415\n            ],\n            [\n              -121.47059440612794,\n              40.6504293761137\n            ],\n            [\n              -121.45668983459471,\n              40.64548010364599\n            ]\n          ]\n        ]\n      }\n    },\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -121.80130004882811,\n              44.66059484350969\n            ],\n            [\n              -121.79168701171875,\n              44.65632119195088\n            ],\n            [\n              -121.77623748779295,\n              44.662914693874\n            ],\n            [\n              -121.76576614379881,\n              44.67158278684375\n            ],\n            [\n              -121.76868438720703,\n              44.67890692528533\n            ],\n            [\n              -121.79031372070312,\n              44.696237031727534\n            ],\n            [\n              -121.8218994140625,\n              44.69452866008004\n            ],\n            [\n              -121.82155609130858,\n              44.67646564865964\n            ],\n            [\n              -121.81657791137695,\n              44.665722809592104\n            ],\n            [\n              -121.80130004882811,\n              44.66059484350969\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"82","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Anderson, A. T.","contributorId":71317,"corporation":false,"usgs":true,"family":"Anderson","given":"A.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":831017,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gottfried, David","contributorId":82295,"corporation":false,"usgs":true,"family":"Gottfried","given":"David","email":"","affiliations":[],"preferred":false,"id":831018,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70227387,"text":"70227387 - 1971 - Origin of ridge-top depressions by large-scale creep in the Olympic Mountains, Washington","interactions":[],"lastModifiedDate":"2022-01-12T19:05:05.814387","indexId":"70227387","displayToPublicDate":"1971-07-01T12:55:13","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5935,"text":"Bulletin of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Origin of ridge-top depressions by large-scale creep in the Olympic Mountains, Washington","docAbstract":"<div class=\"article-section-wrapper js-article-section js-content-section  \"><p>In the high mountain area of the Olympic Mountains, Washington, there are many troughlike depressions on and essentially parallel to ridge tops. The troughs are mostly developed on rocks with strong planar anisotropy: slate, sandstone, and phyllite. Similar features in Europe, Japan, and New Zealand have been variously ascribed to erosion, slow movement along deep-seated shear planes, creep, and tectonic movements. In the Olympics, many depressions parallel structure; one wall is steeply dipping rocks, the other shattered, gently dipping rocks. These depressions seem to be the gaps left between undisturbed steeply dipping rocks and beds or cleavage bent valley-ward by creep. A few troughs may be the result of slow down-slope movement along deep-seated shear planes; this is a favorite explanation of eastern European workers. The Olympic ridge-top depressions testify to the importance of gravity in the degradation of high mountains carved from weak rocks.</p></div>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1971)82[1811:OORDBL]2.0.CO;2","usgsCitation":"Tabor, R.W., 1971, Origin of ridge-top depressions by large-scale creep in the Olympic Mountains, Washington: Bulletin of the Geological Society of America, v. 82, no. 7, p. 1811-1822, https://doi.org/10.1130/0016-7606(1971)82[1811:OORDBL]2.0.CO;2.","productDescription":"12 p.","startPage":"1811","endPage":"1822","costCenters":[],"links":[{"id":394253,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Washington","otherGeospatial":"Olympic Mountains","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -124.42016601562499,\n              47.61356975397398\n            ],\n            [\n              -124.0576171875,\n              47.301584511330795\n            ],\n            [\n              -123.3544921875,\n              47.212105775622426\n            ],\n            [\n              -122.81616210937499,\n              47.71715357016648\n            ],\n            [\n              -122.904052734375,\n              48.05605376398125\n            ],\n            [\n              -123.99169921875,\n              48.188063481211415\n            ],\n            [\n              -124.4091796875,\n              48.29050321714062\n            ],\n            [\n              -124.47509765625,\n              47.98256841921405\n            ],\n            [\n              -124.3212890625,\n              47.82053186746053\n            ],\n            [\n              -124.46411132812499,\n              47.724544549099676\n            ],\n            [\n              -124.42016601562499,\n              47.61356975397398\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"82","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Tabor, Rowland W. rtabor@usgs.gov","contributorId":3816,"corporation":false,"usgs":true,"family":"Tabor","given":"Rowland","email":"rtabor@usgs.gov","middleInitial":"W.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":830725,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70203624,"text":"70203624 - 1971 - Evaluating the effects of discharge rates, water levels, and peaking on fish populations in Missouri River main stem impoundments","interactions":[],"lastModifiedDate":"2019-05-28T09:41:33","indexId":"70203624","displayToPublicDate":"1971-07-01T09:41:00","publicationYear":"1971","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Evaluating the effects of discharge rates, water levels, and peaking on fish populations in Missouri River main stem impoundments","docAbstract":"<p>No abstract available.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"International Symposium on Man-Made Lakes, Their Problems, and Environmental Effects","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"International Symposium on Man-Made Lakes, Their Problems, and Environmental Effects","conferenceDate":"May 3-7, 1971","conferenceLocation":"Knoxville, Tennessee","language":"English","publisher":"American Geophysical Union","doi":"10.1029/GM017p0683","usgsCitation":"Benson, N.G., 1971, Evaluating the effects of discharge rates, water levels, and peaking on fish populations in Missouri River main stem impoundments, <i>in</i> International Symposium on Man-Made Lakes, Their Problems, and Environmental Effects, v. 17, Knoxville, Tennessee, May 3-7, 1971, 7 p., https://doi.org/10.1029/GM017p0683.","productDescription":"7 p.","costCenters":[{"id":17705,"text":"Wetland and Aquatic Research Center","active":true,"usgs":true}],"links":[{"id":364174,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"17","noUsgsAuthors":false,"publicationDate":"2013-03-19","publicationStatus":"PW","contributors":{"editors":[{"text":"Ackermann, William C.","contributorId":215876,"corporation":false,"usgs":false,"family":"Ackermann","given":"William","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":763308,"contributorType":{"id":2,"text":"Editors"},"rank":1},{"text":"White, Gilbert F.","contributorId":189688,"corporation":false,"usgs":false,"family":"White","given":"Gilbert","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":763309,"contributorType":{"id":2,"text":"Editors"},"rank":2},{"text":"Worthington, E.B.","contributorId":215877,"corporation":false,"usgs":false,"family":"Worthington","given":"E.B.","email":"","affiliations":[],"preferred":false,"id":763310,"contributorType":{"id":2,"text":"Editors"},"rank":3},{"text":"Ivens, J. Loreena","contributorId":215878,"corporation":false,"usgs":false,"family":"Ivens","given":"J.","email":"","middleInitial":"Loreena","affiliations":[],"preferred":false,"id":763311,"contributorType":{"id":2,"text":"Editors"},"rank":4}],"authors":[{"text":"Benson, Norman Gustaf","contributorId":91915,"corporation":false,"usgs":true,"family":"Benson","given":"Norman","email":"","middleInitial":"Gustaf","affiliations":[],"preferred":false,"id":763307,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70227160,"text":"70227160 - 1971 - Fractionation of minor elements between galena and sphalerite, Darwin lead-silver-zinc mine, Inyo County, California and its significance in geothermometry","interactions":[],"lastModifiedDate":"2021-12-31T15:28:09.464563","indexId":"70227160","displayToPublicDate":"1971-07-01T09:19:30","publicationYear":"1971","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":"Fractionation of minor elements between galena and sphalerite, Darwin lead-silver-zinc mine, Inyo County, California and its significance in geothermometry","docAbstract":"<div class=\"article-section-wrapper js-article-section js-content-section  \"><p>Minor element abundances were determined for galena and sphalerite from the Darwin mine, Inyo County, California. The temperature of deposition was calculated from the distribution coefficients determined experimentally by Bethke and Barton (1971) for cadmium and manganese in coexisting galena and sphalerite. The fractionation of cadmium between coexisting sphalerite and galena indicates a temperature of deposition of 416 degrees C+ or -20 degrees , the fractionation of manganese between the same mineral pair a temperature of 377 degrees C+ or -32 degrees . The fractionation of selenium gave unreasonably high temperatures. Three pairs gave temperatures between 568 degrees and 625 degrees C, the fourth pair a temperature of 889 degrees C. The reason for this descrepancy is not known.</p></div>","language":"English","publisher":"Society of Economic Geologists","doi":"10.2113/gsecongeo.66.4.602","usgsCitation":"Hall, W.E., Rose, H.J., and Simon, F.O., 1971, Fractionation of minor elements between galena and sphalerite, Darwin lead-silver-zinc mine, Inyo County, California and its significance in geothermometry: Economic Geology, v. 66, no. 4, p. 602-606, https://doi.org/10.2113/gsecongeo.66.4.602.","productDescription":"5 p.","startPage":"602","endPage":"606","costCenters":[],"links":[{"id":393719,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","county":"Inyo County","otherGeospatial":"Darwin lead-silver-zinc mine","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -117.67181396484376,\n              36.20660692859011\n            ],\n            [\n              -117.48641967773438,\n              36.20660692859011\n            ],\n            [\n              -117.48641967773438,\n              36.32176422120382\n            ],\n            [\n              -117.67181396484376,\n              36.32176422120382\n            ],\n            [\n              -117.67181396484376,\n              36.20660692859011\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"66","issue":"4","noUsgsAuthors":false,"publicationDate":"1971-07-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Hall, Wayne E.","contributorId":89955,"corporation":false,"usgs":true,"family":"Hall","given":"Wayne","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":829854,"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":829855,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Simon, Frederick Otto","contributorId":30616,"corporation":false,"usgs":true,"family":"Simon","given":"Frederick","email":"","middleInitial":"Otto","affiliations":[],"preferred":false,"id":829856,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70227159,"text":"70227159 - 1971 - Comments on the role of oxygen fugacity in the formation of immiscible sulfide liquids in the H chromitite zone of the Stillwater complex, Montana","interactions":[],"lastModifiedDate":"2021-12-31T15:15:32.072873","indexId":"70227159","displayToPublicDate":"1971-07-01T09:07:39","publicationYear":"1971","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":"Comments on the role of oxygen fugacity in the formation of immiscible sulfide liquids in the H chromitite zone of the Stillwater complex, Montana","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"Society of Economic Geologists","doi":"10.2113/gsecongeo.66.4.607","usgsCitation":"Page, N.J., 1971, Comments on the role of oxygen fugacity in the formation of immiscible sulfide liquids in the H chromitite zone of the Stillwater complex, Montana: Economic Geology, v. 66, no. 4, p. 607-610, https://doi.org/10.2113/gsecongeo.66.4.607.","productDescription":"4 p.","startPage":"607","endPage":"610","costCenters":[],"links":[{"id":393718,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Montana","otherGeospatial":"Stillwater complex","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -110.36041259765624,\n              45.28551576865198\n            ],\n            [\n              -109.49111938476562,\n              45.28551576865198\n            ],\n            [\n              -109.49111938476562,\n              45.628444574718564\n            ],\n            [\n              -110.36041259765624,\n              45.628444574718564\n            ],\n            [\n              -110.36041259765624,\n              45.28551576865198\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"66","issue":"4","noUsgsAuthors":false,"publicationDate":"1971-07-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Page, Norman J.","contributorId":46492,"corporation":false,"usgs":true,"family":"Page","given":"Norman","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":829853,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":1003244,"text":"1003244 - 1971 - The influence of pH on the efficacy and residues of quinaldine","interactions":[],"lastModifiedDate":"2026-04-14T18:27:02.030554","indexId":"1003244","displayToPublicDate":"1971-07-01T00:00:00","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3624,"text":"Transactions of the American Fisheries Society","active":true,"publicationSubtype":{"id":10}},"title":"The influence of pH on the efficacy and residues of quinaldine","docAbstract":"<p><span>Quinaldine, an anesthetic for fish, loses its effectiveness in solutions having pH values less than 6. Measured quantities of un‐ionized quinaldine in solution compared favorably with calculated values at selected pHˈs. Quinaldine residues in largemouth bass (Micropterus salmoides) anesthetized at various pHˈs verify that only the un‐ionized portion in solution enters the fish. Quinaldine residues in fish and un‐ionized quinaldine in solution were measured by gas chromatography.</span></p>","language":"English","publisher":"American Fisheries Society","doi":"10.1577/1548-8659(1971)100<544:TIOPOT>2.0.CO;2","usgsCitation":"Sills, J., and Allen, J.L., 1971, The influence of pH on the efficacy and residues of quinaldine: Transactions of the American Fisheries Society, v. 100, no. 3, p. 544-545, https://doi.org/10.1577/1548-8659(1971)100<544:TIOPOT>2.0.CO;2.","productDescription":"2 p.","startPage":"544","endPage":"545","costCenters":[{"id":606,"text":"Upper Midwest Environmental Sciences Center","active":true,"usgs":true}],"links":[{"id":198268,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"100","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a85e4b07f02db64d554","contributors":{"authors":[{"text":"Sills, J.B.","contributorId":55380,"corporation":false,"usgs":true,"family":"Sills","given":"J.B.","email":"","affiliations":[],"preferred":false,"id":313021,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Allen, J. L.","contributorId":49295,"corporation":false,"usgs":true,"family":"Allen","given":"J.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":313020,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70206975,"text":"70206975 - 1971 - Geochemistry of water","interactions":[],"lastModifiedDate":"2019-12-03T07:59:14","indexId":"70206975","displayToPublicDate":"1971-06-30T12:23:24","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1578,"text":"Eos, Transactions, American Geophysical Union","onlineIssn":"2324-9250","printIssn":"0096-394","active":true,"publicationSubtype":{"id":10}},"title":"Geochemistry of water","docAbstract":"<p><span>The quadrennium 1967–1970 has been a productive period in the field of water geochemistry. Field studies, laboratory investigations, and theoretical considerations have led to significant advances in our knowledge of the chemical behavior of natural waters and of the solid earth materials that contain them. A symposium on trace inorganics in water, sponsored by the American Chemical Society, was held in Miami, Florida, in 1967. The proceedings of this conference were published in 1968 in the Advances in Chemistry Series 73. This volume deals with the occurrence, behavior, and analysis of inorganic constituents in natural waters.&nbsp;</span></p>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/EO052i006pIU302","issn":"00963941","usgsCitation":"Bricker, O., 1971, Geochemistry of water: Eos, Transactions, American Geophysical Union, v. 52, no. 6, p. IUGG302-IUGG305, https://doi.org/10.1029/EO052i006pIU302.","productDescription":"4 p. ","startPage":"IUGG302","endPage":"IUGG305","costCenters":[],"links":[{"id":369808,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"52","issue":"6","noUsgsAuthors":false,"publicationDate":"2012-04-12","publicationStatus":"PW","contributors":{"authors":[{"text":"Bricker, O.P.","contributorId":33717,"corporation":false,"usgs":true,"family":"Bricker","given":"O.P.","affiliations":[],"preferred":false,"id":776436,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":5221238,"text":"5221238 - 1971 - Changes in mineral composition of eggshells from black ducks and mallards fed DDE in the diet","interactions":[],"lastModifiedDate":"2020-02-26T12:58:16","indexId":"5221238","displayToPublicDate":"1971-06-16T12:17:51","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1103,"text":"Bulletin of Environmental Contamination and Toxicology","active":true,"publicationSubtype":{"id":10}},"title":"Changes in mineral composition of eggshells from black ducks and mallards fed DDE in the diet","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"Springer","doi":"10.1007/BF01540002","usgsCitation":"Longcore, J.R., Samson, F.B., Kreitzer, J., and Spann, J.W., 1971, Changes in mineral composition of eggshells from black ducks and mallards fed DDE in the diet: Bulletin of Environmental Contamination and Toxicology, v. 6, no. 4, p. 345-350, https://doi.org/10.1007/BF01540002.","productDescription":"6 p.","startPage":"345","endPage":"350","numberOfPages":"6","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":197247,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":16135,"rank":200,"type":{"id":11,"text":"Document"},"url":"https://www.springerlink.com/content/p7p05mt446t72n22/?p=447416c6f05c4a45b82b6dff31dc4ad2&pi=10","linkFileType":{"id":5,"text":"html"}}],"volume":"6","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49e5e4b07f02db5e6ca8","contributors":{"authors":[{"text":"Longcore, J. R. 0000-0003-4898-5438","orcid":"https://orcid.org/0000-0003-4898-5438","contributorId":43835,"corporation":false,"usgs":true,"family":"Longcore","given":"J.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":333364,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Samson, F. B.","contributorId":77880,"corporation":false,"usgs":true,"family":"Samson","given":"F.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":333366,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kreitzer, J.F.","contributorId":57170,"corporation":false,"usgs":true,"family":"Kreitzer","given":"J.F.","affiliations":[],"preferred":false,"id":333365,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Spann, J. W.","contributorId":93435,"corporation":false,"usgs":true,"family":"Spann","given":"J.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":333367,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":5222821,"text":"5222821 - 1971 - Hazards of mercury: Special report to the secretary's pesticide advisory committee, department of health, education, and welfare, November 1970","interactions":[],"lastModifiedDate":"2021-04-09T17:34:56.030404","indexId":"5222821","displayToPublicDate":"1971-06-16T12:17:50","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1561,"text":"Environmental Research","active":true,"publicationSubtype":{"id":10}},"title":"Hazards of mercury: Special report to the secretary's pesticide advisory committee, department of health, education, and welfare, November 1970","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/0013-9351(71)90021-1","usgsCitation":"Nelson, N., Byerly, T.C., Kolbye, A.C., Kurland, L.T., Shapiro, R.E., Shibko, S.L., Stickel, W.H., Thompson, J.E., Van Den Berg, L.A., and Weissler, A., 1971, Hazards of mercury: Special report to the secretary's pesticide advisory committee, department of health, education, and welfare, November 1970: Environmental Research, v. 4, no. 1, p. 1-69, https://doi.org/10.1016/0013-9351(71)90021-1.","productDescription":"69 p.","startPage":"1","endPage":"69","numberOfPages":"69","costCenters":[{"id":531,"text":"Patuxent Wildlife Research Center","active":true,"usgs":true}],"links":[{"id":201557,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"4","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a5fe4b07f02db634adb","contributors":{"authors":[{"text":"Nelson, Norton","contributorId":91215,"corporation":false,"usgs":true,"family":"Nelson","given":"Norton","email":"","affiliations":[],"preferred":false,"id":337238,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Byerly, Theodore C.","contributorId":178247,"corporation":false,"usgs":false,"family":"Byerly","given":"Theodore","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":658293,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kolbye, Albert C. Jr.","contributorId":178248,"corporation":false,"usgs":false,"family":"Kolbye","given":"Albert","suffix":"Jr.","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":658294,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kurland, Leonard T.","contributorId":178249,"corporation":false,"usgs":false,"family":"Kurland","given":"Leonard","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":658295,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Shapiro, Raymond E.","contributorId":178250,"corporation":false,"usgs":false,"family":"Shapiro","given":"Raymond","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":658296,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Shibko, Samuel L.","contributorId":178251,"corporation":false,"usgs":false,"family":"Shibko","given":"Samuel","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":658297,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Stickel, William H.","contributorId":178252,"corporation":false,"usgs":false,"family":"Stickel","given":"William","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":337237,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Thompson, Jack E.","contributorId":178253,"corporation":false,"usgs":false,"family":"Thompson","given":"Jack","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":658298,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Van Den Berg, Lowell A.","contributorId":178254,"corporation":false,"usgs":false,"family":"Van Den Berg","given":"Lowell","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":658299,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Weissler, Alfred","contributorId":178255,"corporation":false,"usgs":false,"family":"Weissler","given":"Alfred","email":"","affiliations":[],"preferred":false,"id":658300,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}}
,{"id":70210477,"text":"70210477 - 1971 - Volcanology, geochemistry, and petrology: U.S. National Report, 1967-1971, Fifteenth General Assembly, IUGG: Investigations at active volcanoes","interactions":[],"lastModifiedDate":"2020-06-04T14:06:40.313419","indexId":"70210477","displayToPublicDate":"1971-06-04T09:03:40","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3879,"text":"Eos, Earth and Space Science News","active":true,"publicationSubtype":{"id":10}},"title":"Volcanology, geochemistry, and petrology: U.S. National Report, 1967-1971, Fifteenth General Assembly, IUGG: Investigations at active volcanoes","docAbstract":"<div id=\"article__content\" class=\"col-sm-12 col-md-8 col-lg-8 article__content article-row-left\"><div class=\"article__body \"><div class=\"article-section__content en main\"><p>The field of volcanology has expanded greatly in the years 1967–1970, and work on active volcanoes has kept pace with this expansion. I have restricted this summary and the accompanying bibliography to studies by U.S.‐based investigators of active or potentially active volcanoes. I have been immeasurably aided in writing this summary by communications from R. Citron of the Smithsonian Institution Center for Short‐Lived Phenomena, W. Melson and T. Simkin of the Smithsonian Institution, A. McBirney of the Center for Volcanology, University of Oregon, R.B. Forbes of the University of Alaska, and R.W. Decker of Dartmouth College.</p></div></div></div>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/EO052i005pIU057","usgsCitation":"Wright, T., 1971, Volcanology, geochemistry, and petrology: U.S. National Report, 1967-1971, Fifteenth General Assembly, IUGG: Investigations at active volcanoes: Eos, Earth and Space Science News, v. 52, no. 5, p. 57-62, https://doi.org/10.1029/EO052i005pIU057.","productDescription":"6 p.","startPage":"57","endPage":"62","costCenters":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"links":[{"id":375355,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"52","issue":"5","noUsgsAuthors":false,"publicationDate":"2012-04-12","publicationStatus":"PW","contributors":{"authors":[{"text":"Wright, Thomas L. twright@usgs.gov","contributorId":3890,"corporation":false,"usgs":true,"family":"Wright","given":"Thomas L.","email":"twright@usgs.gov","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":790331,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70010333,"text":"70010333 - 1971 - Obsidian hydration dating applied to dating of basaltic volcanic activity","interactions":[],"lastModifiedDate":"2026-01-28T18:21:02.012367","indexId":"70010333","displayToPublicDate":"1971-06-04T00:00:00","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Obsidian hydration dating applied to dating of basaltic volcanic activity","docAbstract":"Basalt flows and bombs that contain remelted rhyolite glass can be dated by obsidian hydration dating.","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.172.3987.1028","issn":"00368075","usgsCitation":"Friedman, I., and Peterson, N., 1971, Obsidian hydration dating applied to dating of basaltic volcanic activity: Science, v. 172, no. 3987, p. 1028-1028, https://doi.org/10.1126/science.172.3987.1028.","productDescription":"1 p.","startPage":"1028","endPage":"1028","costCenters":[],"links":[{"id":218790,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"172","issue":"3987","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a6b00e4b0c8380cd74485","contributors":{"authors":[{"text":"Friedman, I.","contributorId":95596,"corporation":false,"usgs":true,"family":"Friedman","given":"I.","email":"","affiliations":[],"preferred":false,"id":358659,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Peterson, N.","contributorId":32668,"corporation":false,"usgs":true,"family":"Peterson","given":"N.","affiliations":[],"preferred":false,"id":358658,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70227418,"text":"70227418 - 1971 - Boulder Creek batholith, Colorado part II: Isotopic age of emplacement and morphology of zircon","interactions":[],"lastModifiedDate":"2022-01-13T21:59:29.249676","indexId":"70227418","displayToPublicDate":"1971-06-01T15:55:28","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5935,"text":"Bulletin of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Boulder Creek batholith, Colorado part II: Isotopic age of emplacement and morphology of zircon","docAbstract":"<p>Zircon separated from six rocks whose compositions spanned the range of differentiation in the Boulder Creek batholith yielded a “discordia” age of emplacement of 1725 m.y., close to the average PB<sup>207</sup>/Pb<sup>206</sup><span>&nbsp;</span>age 1720 m.y.) and indicating that the constituent rocks are cogenetic within approximately ± 20 m.y. Statistical studies show that from 20 to 80 percent of the zircon in any one sample (1) is no-neuhedral, (2) has lower (length/width) ratios than the associated euhedral zircon, and (3) in direct contrast to the euhedral, increases markedly interior of the batholith toward contacts with the older metasediments and internal zones of contamination; it is inferred to have been “inherited” via assimilation. Unlike the noneuhedral fraction the euhedral zircon shows a linear decrease in length/width ratio with an increase in SiO<sub>2</sub><span>&nbsp;</span>content of the containing rocks; it is inferred to be magmatic in origin. Regardless of the relative abundance of inherited versus magmatic zircon, all samples closely fit a single discordia chord, indicating that both zircon fractions formed at about the same time. This conclusion is compatible with field relationships that indicate the emplacement of the syntectonic Boulder Creek rocks took place during a period of metamorphism notable for the widespread development of new minerals in the country rocks.</p><p>(1) Zircon from a Silver Plume Granite dike intruding the Boulder Creek batholith, (2) zircon from Silver Plume correlatives immediately to the north (Tilton and co-workers), and (3) uraninite from a probable Silver Plume correlative in the Central City district, together yield a sharply defined discordia age of emplacement of 1415 m.y.</p><p>The separate “discordia” chords for the Boulder Creek and Silver Plume zirconconverge close to their lower intercepts with “concordia” indicative of a one-step lead loss during the Laramide disturbance. The Silver Plume “thermal event” left no age imprint on the Boulder Creek zircon, presumably because insufficient time had elapsed to produce significant metamictization.</p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1971)82[1615:BCBCPI]2.0.CO;2","usgsCitation":"Stern, T.W., Phair, G., and Newell, M.F., 1971, Boulder Creek batholith, Colorado part II: Isotopic age of emplacement and morphology of zircon: Bulletin of the Geological Society of America, v. 82, no. 6, p. 1615-1633, https://doi.org/10.1130/0016-7606(1971)82[1615:BCBCPI]2.0.CO;2.","productDescription":"19 p.","startPage":"1615","endPage":"1633","costCenters":[],"links":[{"id":394354,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado","otherGeospatial":"Boulder Creek batholith","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -105.96450805664062,\n              39.536880650643056\n            ],\n            [\n              -104.98672485351562,\n              39.536880650643056\n            ],\n            [\n              -104.98672485351562,\n              40.263808598903566\n            ],\n            [\n              -105.96450805664062,\n              40.263808598903566\n            ],\n            [\n              -105.96450805664062,\n              39.536880650643056\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"82","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Stern, Thomas W.","contributorId":271088,"corporation":false,"usgs":false,"family":"Stern","given":"Thomas","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":830778,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Phair, George","contributorId":91512,"corporation":false,"usgs":true,"family":"Phair","given":"George","email":"","affiliations":[],"preferred":false,"id":830779,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Newell, Marcia F.","contributorId":47238,"corporation":false,"usgs":true,"family":"Newell","given":"Marcia","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":830780,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70227417,"text":"70227417 - 1971 - Quaternary faulting in the eastern Alaska Range","interactions":[],"lastModifiedDate":"2022-01-13T21:54:42.923137","indexId":"70227417","displayToPublicDate":"1971-06-01T15:45:27","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5935,"text":"Bulletin of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Quaternary faulting in the eastern Alaska Range","docAbstract":"<p>Quaternary faulting is well displayed along the Denali fault system and the recently recognized and related Totschunda fault system in the eastern Alaska Range. The principal movement on both fault systems is right-lateral strike-slip. Offset glacial features of Wisconsin age indicate minimum Holocene slip rates of 1.1 to 3.5 cm per year along parts of the Denali fault system, and 0.9 to 3.3 cm per year along the Totschunda fault system. Strike-slip movement along the Denali fault system may be no older than early Pliocene and, southeast of the Totschunda fault system junction, may have terminated by the middle Pleistocene. The strike-slip Totschunda fault system, a much younger feature probably no older than middle Pleistocene, exhibits 9 to 10 km of right-lateral offset and 1,500 m of relative vertical movement. The Totschunda fault system is aligned with, and has the same sense of slip as, the Fairweather fault in the Gulf of Alaska.</p><p>The Denali fault system and the Queen Charlotte Islands fault are part of a major transform fault system separating the North American and Pacific plates. Continental southern Alaska between the Aleutian arc and the Denali fault system is now largely coupled to the Pacific plate. The Totschunda-Fairweather alignment probably represents the beginning of a new transform fault by-passing the southeast part of the Denali fault system.</p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1971)82[1529:QFITEA]2.0.CO;2","usgsCitation":"Richter, D., and Matson, N., 1971, Quaternary faulting in the eastern Alaska Range: Bulletin of the Geological Society of America, v. 82, no. 6, p. 1529-1540, https://doi.org/10.1130/0016-7606(1971)82[1529:QFITEA]2.0.CO;2.","productDescription":"12 p.","startPage":"1529","endPage":"1540","costCenters":[],"links":[{"id":394352,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Alaska Range, Denali fault system, Queen Charlotte Islands, Totschunda fault system","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -162.2900390625,\n              58.63121664342478\n            ],\n            [\n              -162.333984375,\n              58.516651799363785\n            ],\n            [\n              -161.4990234375,\n              58.309488840677645\n            ],\n            [\n              -159.7412109375,\n              58.88194208135912\n            ],\n            [\n              -155.17089843749997,\n              61.227957176677876\n            ],\n            [\n              -150.205078125,\n              62.36999628130772\n            ],\n            [\n              -148.5791015625,\n              62.79493487887006\n            ],\n            [\n              -146.6015625,\n              62.59334083012024\n            ],\n            [\n              -145.634765625,\n              62.062733258846514\n            ],\n            [\n              -141.0205078125,\n              60.261617082844616\n            ],\n            [\n              -141.0205078125,\n              62.83508901142283\n            ],\n            [\n              -143.7451171875,\n              63.93737246791484\n            ],\n            [\n              -147.3046875,\n              64.32087157990324\n            ],\n            [\n              -149.4140625,\n              64.01449619484472\n            ],\n            [\n              -157.32421875,\n              62.30879369102805\n            ],\n            [\n              -161.1474609375,\n              59.5343180010956\n            ],\n            [\n              -162.2900390625,\n              58.63121664342478\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"82","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Richter, D.H.","contributorId":43325,"corporation":false,"usgs":true,"family":"Richter","given":"D.H.","email":"","affiliations":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"preferred":false,"id":830776,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Matson, N.A. Jr.","contributorId":102956,"corporation":false,"usgs":true,"family":"Matson","given":"N.A.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":830777,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70227416,"text":"70227416 - 1971 - Boulder Creek batholith, Colorado part III: Fingerprinting discordant zircon ages in a complex intrusion","interactions":[],"lastModifiedDate":"2022-01-13T21:44:21.359303","indexId":"70227416","displayToPublicDate":"1971-06-01T15:39:19","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5935,"text":"Bulletin of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Boulder Creek batholith, Colorado part III: Fingerprinting discordant zircon ages in a complex intrusion","docAbstract":"<p>The apparent ages (32 lead/alpha and 6 Pb<sup>206</sup>/U<sup>238</sup>) of zircon as plotted on an isochron map of the Boulder Creek batholith define the following pattern: (1) very high ages (1600 to 1900 m.y.) within the outermost border zone on the southwest, south, and southeast; (2) transitional high ages (1300 to 1600 m.y.) within an inner border zone on the east and widening to the south and west to include about one-third of the batholith; (3) transitional low ages (1000 to 1300 m.y.) throughout much of the interior of the northern half; and (4) very low ages (1000 m.y. or less) limited to a small area within the northeast corner.</p><p>The area of minimum age is shown to be part of the reduced-age aureole surrounding the 77 m.y. hornblende granodiorite stock at Jamestown that intrudes the Silver Plume Granite of the Longs Peak-St. Vrain batholith in the region immediately to the north of the minimum-age area of the Boulder Creek batholith. A southeastward elongation of the area of minimum age is attributed to channelway control of the solutions responsible for the recrystallization of the zircon by those northwest-trending breccia reefs that are cut by, or strike toward, the Laramide intrusion.</p><p>Statistical studies of five zircon separates used for isotopic work showed that the frequency of grains having partial, or complete, rims of colorless zircon on purple to semiopaque zircon cores increased inversely with measured Pb<sup>206</sup>/U<sup>238</sup><span>&nbsp;</span>age along a smooth curve that, when extrapolated, connected the point representing age of emplacement (0 percent rims) and the point representing the approximate age of re-crystallization (100 percent rims). Consequently, in the Boulder Creek zircon rim frequency gives a useful estimate of the amount of lead lost relative to uranium and thorium from a given sample during its recrystallization. The microstudy indicated: (1) the surface separating core and rim is a major discontinuity; (2) the greater part of the rims appear to be true overgrowths; and (3) the highest frequency of rims is found in the most metamict zircon. However, in any one sample a significant fraction of the most metamict zircon has been sheltered from reaction, presumably by inclusion within relatively impervious minerals, and remains free of rims. These observations coupled with the map evidence of selective channelway control point to warm solutions rather than dry heat as the agent of recrystallization and lead loss.</p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1971)82[1635:BCBCPI]2.0.CO;2","usgsCitation":"Phair, G., Stern, T.W., and Gottfried, D., 1971, Boulder Creek batholith, Colorado part III: Fingerprinting discordant zircon ages in a complex intrusion: Bulletin of the Geological Society of America, v. 82, no. 6, p. 1635-1655, https://doi.org/10.1130/0016-7606(1971)82[1635:BCBCPI]2.0.CO;2.","productDescription":"21 p.","startPage":"1635","endPage":"1655","costCenters":[],"links":[{"id":394351,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Colorado","otherGeospatial":"Boulder Creek batholith","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -105.96450805664062,\n              39.536880650643056\n            ],\n            [\n              -104.98672485351562,\n              39.536880650643056\n            ],\n            [\n              -104.98672485351562,\n              40.263808598903566\n            ],\n            [\n              -105.96450805664062,\n              40.263808598903566\n            ],\n            [\n              -105.96450805664062,\n              39.536880650643056\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"82","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Phair, George","contributorId":91512,"corporation":false,"usgs":true,"family":"Phair","given":"George","email":"","affiliations":[],"preferred":false,"id":830773,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Stern, Thomas W.","contributorId":271088,"corporation":false,"usgs":false,"family":"Stern","given":"Thomas","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":830774,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gottfried, David","contributorId":82295,"corporation":false,"usgs":true,"family":"Gottfried","given":"David","email":"","affiliations":[],"preferred":false,"id":830775,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70227414,"text":"70227414 - 1971 - Phylum and class nomenclature in systematics","interactions":[],"lastModifiedDate":"2022-01-13T21:28:03.238857","indexId":"70227414","displayToPublicDate":"1971-06-01T15:22:20","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3510,"text":"Systematic Biology","active":true,"publicationSubtype":{"id":10}},"title":"Phylum and class nomenclature in systematics","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"Oxford University Press","doi":"10.2307/2412062","usgsCitation":"Yochelson, E.L., 1971, Phylum and class nomenclature in systematics: Systematic Biology, v. 20, no. 2, p. 245-249, https://doi.org/10.2307/2412062.","productDescription":"5 p.","startPage":"245","endPage":"249","costCenters":[],"links":[{"id":394348,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"20","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Yochelson, Ellis L.","contributorId":90802,"corporation":false,"usgs":true,"family":"Yochelson","given":"Ellis","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":830771,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70227348,"text":"70227348 - 1971 - Comparison of SLAR images and small-scale, low-sun aerial photographs","interactions":[],"lastModifiedDate":"2022-01-10T21:26:27.130718","indexId":"70227348","displayToPublicDate":"1971-06-01T15:15:53","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5935,"text":"Bulletin of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Comparison of SLAR images and small-scale, low-sun aerial photographs","docAbstract":"<p>A comparison of side-looking airborne radar (SLAR) images and black and white aerial photos of similar scale and illumination of an area in the Mojave Desert of California shows that aerial photos yield far more information about geology than do SLAR images because of greater resolution, tonal range, and geometric fidelity, and easier use in stereo. Nevertheless, radar can differentiate some materials or surfaces that aerial photos cannot; thus, they should be considered as complementary, rather than competing tools in geologic investigations.</p><p>The most significant advantage of SLAR, however, is its freedom from the stringent conditions of weather, date, and time that are required by small-scale aerial photos taken with a specified direction and angle of illumination. Indeed, in low latitudes, SLAR is the only way to obtain small-scale images with low illumination from certain directions; moreover, in areas of nearly continuous cloudiness, radar may be the only practical source of small-scale images.</p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1971)82[1735:COSIAS]2.0.CO;2","usgsCitation":"Clark, M.M., 1971, Comparison of SLAR images and small-scale, low-sun aerial photographs: Bulletin of the Geological Society of America, v. 82, no. 6, p. 1735-1742, https://doi.org/10.1130/0016-7606(1971)82[1735:COSIAS]2.0.CO;2.","productDescription":"8 p.","startPage":"1735","endPage":"1742","costCenters":[],"links":[{"id":394145,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Mojave Desert","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -118.828125,\n              34.79576153473033\n            ],\n            [\n              -118.311767578125,\n              34.6060845921693\n            ],\n            [\n              -117.46582031249999,\n              34.252676117101515\n            ],\n            [\n              -116.83959960937499,\n              33.97980872872457\n            ],\n            [\n              -116.42211914062499,\n              33.970697997361626\n            ],\n            [\n              -116.05957031249999,\n              34.134541681937364\n            ],\n            [\n              -115.411376953125,\n              34.116352469972746\n            ],\n            [\n              -114.136962890625,\n              34.279914398549934\n            ],\n            [\n              -114.400634765625,\n              34.46127728843705\n            ],\n            [\n              -114.47753906249999,\n              34.70549341022544\n            ],\n            [\n              -114.6533203125,\n              34.88593094075317\n            ],\n            [\n              -114.63134765625001,\n              35.0120020431607\n            ],\n            [\n              -118.02612304687499,\n              37.58811876638322\n            ],\n            [\n              -118.17993164062499,\n              37.23907530202184\n            ],\n            [\n              -118.27880859375001,\n              36.94111143010769\n            ],\n            [\n              -118.02612304687499,\n              36.4477991295848\n            ],\n            [\n              -118.037109375,\n              36.26199220445664\n            ],\n            [\n              -117.828369140625,\n              35.69299463209881\n            ],\n            [\n              -118.048095703125,\n              35.35321610123823\n            ],\n            [\n              -118.828125,\n              34.79576153473033\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"82","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Clark, Malcolm M.","contributorId":70363,"corporation":false,"usgs":true,"family":"Clark","given":"Malcolm","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":830544,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70227411,"text":"70227411 - 1971 - Erosion and sedimentation","interactions":[],"lastModifiedDate":"2022-01-13T21:00:32.937487","indexId":"70227411","displayToPublicDate":"1971-06-01T14:55:06","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":7458,"text":"Eos Science News","active":true,"publicationSubtype":{"id":10}},"title":"Erosion and sedimentation","docAbstract":"<div class=\"article-section__content en main\"><p>Research activities in erosion and sedimentation processes have expanded broadly during the past several years and have kept pace with generally accelerated developments in all phases of hydrology and water resources investigations.</p></div>","language":"English","publisher":"American Geophysical Union","doi":"10.1029/EO052i006pIU292","usgsCitation":"Nordin, C.F., 1971, Erosion and sedimentation: Eos Science News, v. 52, no. 6, p. 292-295, https://doi.org/10.1029/EO052i006pIU292.","productDescription":"4 p.","startPage":"292","endPage":"295","costCenters":[],"links":[{"id":394342,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"52","issue":"6","noUsgsAuthors":false,"publicationDate":"2012-04-12","publicationStatus":"PW","contributors":{"authors":[{"text":"Nordin, Carl F. Jr.","contributorId":74751,"corporation":false,"usgs":true,"family":"Nordin","given":"Carl","suffix":"Jr.","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":830767,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70227394,"text":"70227394 - 1971 - An aeromagnetic and aeroradioactivity survey of Liberia, West Africa","interactions":[],"lastModifiedDate":"2022-01-12T20:48:42.633416","indexId":"70227394","displayToPublicDate":"1971-06-01T14:31:26","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1808,"text":"Geophysics","active":true,"publicationSubtype":{"id":10}},"title":"An aeromagnetic and aeroradioactivity survey of Liberia, West Africa","docAbstract":"<div class=\"article-section-wrapper js-article-section js-content-section  \"><p>A 140,000 km aeromagnetic and total-count gamma radiometric survey was made over Liberia in 1967-68 along north-south lines spaced 0.8 km over land and 4 km over the continental shelf. The data approximately delineate the boundary between the Liberian (ca. 2700 m.y.) age province in the northwestern two-thirds of the country, and the Pan-African (ca. 550 m.y.) age province in the coastal area of the northwestern two-thirds of the country, as well as a boundary marking the northwest extent of the isoclinally folded paragneisses and migmatites deformed within the Eburnean (ca. 2000 m.y.) age province in the southeast one-third. A zone of diabase dikes about 90 km inland can be traced, parallel to the coast from Sierra Leone to Ivory Coast on the basis of the magnetic data. Another zone of diabase dikes about 185 m.y. old is located along the coastal area and beneath the continental shelf parallel to the coast northwest of Greenville. Intrusion of these dikes probably coincides with the separation of Africa from North and South America. The magnetic data suggest basins of sedimentary rocks possibly 5 km thick on the continental shelf. The map indicates high-amplitude magnetic anomalies greater than 600 gammas; some reach amplitudes as great as 18,000 gammas over iron formation and about 1800 gammas over mafic and ultramafic intrusive bodies.</p><p>The radioactivity data have a background level less than 100 counts per second (cps) over mafic granulite-facies rocks and unmetamorphosed sedimentary rocks in the coastal area. Granitic rocks have the greatest variation. The central area of the country has the highest background radiation level with large areas above 250 cps; the level in the eastern one-third of the country is low. These data are proving quite useful in reconnaissance geologic mapping. All anomalies over 500 cps are shown; some reach amplitudes over 750 cps. Total-count radiation levels have a significant correlation with percent K<sub>2</sub>O in bedrock analyses, but anomalous amounts of Th and U must be present to account for the highest amplitude anomalies. A few specific anomalies have been correlated with concentrations of monazite and zircon in bedrock as well as in beach deposits.</p></div>","language":"English","publisher":"Society of Exploration Geophysicists","doi":"10.1190/1.1440194","usgsCitation":"Behrendt, J.C., and Wotorson, C.S., 1971, An aeromagnetic and aeroradioactivity survey of Liberia, West Africa: Geophysics, v. 36, no. 3, p. 590-604, https://doi.org/10.1190/1.1440194.","productDescription":"15 p.","startPage":"590","endPage":"604","costCenters":[],"links":[{"id":394274,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"Liberia","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -11.5081787109375,\n              6.920973741554155\n            ],\n    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S.","contributorId":106854,"corporation":false,"usgs":true,"family":"Wotorson","given":"Cletus","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":830734,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70227439,"text":"70227439 - 1971 - Age of emplacement of Riley County, Kansas, kimberlites and a possible minimum age for the Dakota Sandstone","interactions":[],"lastModifiedDate":"2022-01-14T18:57:31.504806","indexId":"70227439","displayToPublicDate":"1971-06-01T12:51:20","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5935,"text":"Bulletin of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Age of emplacement of Riley County, Kansas, kimberlites and a possible minimum age for the Dakota Sandstone","docAbstract":"<div class=\"article-section-wrapper js-article-section js-content-section  \"><p>Field evidence suggests that the kimberlites of Riley County, Kansas, were emplaced into Lower Permian rocks in post-Dakota Sandstone time. The Dakota Sandstone in Kansas is thought to be earliest Late Cretaceous in age; thus the maximum age of emplacement of the kimberlites is approximately 100 ± 20 m.y. K-Ar dates on chloritized biotite and phlogopites from the kimberlites range from 112 ± 6 m.y. to 380 ± 40 m.y.; the dates earlier than 100 m.y. (6 of 7 samples) are attributed to either the xenocrystalline nature of the chlorites and/or excess Ar and low temperature of intrusion. Fission track dates from two apatites from granite xenoliths are 115 ± 12 m.y. and 123 ± 12 m.y.; these dates reflect cooling at about 120 m.y. ago, which may place a maximum age of emplacement on the kimberlites.</p></div>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1971)82[1723:AOEORC]2.0.CO;2","usgsCitation":"Brookins, D.G., and Naeser, C.W., 1971, Age of emplacement of Riley County, Kansas, kimberlites and a possible minimum age for the Dakota Sandstone: Bulletin of the Geological Society of America, v. 82, no. 6, p. 1723-1725, https://doi.org/10.1130/0016-7606(1971)82[1723:AOEORC]2.0.CO;2.","productDescription":"3 p.","startPage":"1723","endPage":"1725","costCenters":[],"links":[{"id":394408,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Kansas","county":"Riley County","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"id\":966,\"properties\":{\"name\":\"Riley\",\"state\":\"KS\"},\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[-96.8062,39.5669],[-96.5842,39.5664],[-96.5806,39.5663],[-96.5837,39.5605],[-96.5898,39.5565],[-96.5924,39.5502],[-96.5967,39.5425],[-96.6028,39.5399],[-96.6082,39.5368],[-96.6137,39.5346],[-96.6184,39.5365],[-96.6256,39.5335],[-96.6287,39.5313],[-96.6347,39.5277],[-96.6372,39.5246],[-96.6355,39.5223],[-96.6355,39.5196],[-96.6362,39.5155],[-96.6369,39.511],[-96.6388,39.5087],[-96.6411,39.5101],[-96.644,39.5129],[-96.6458,39.5129],[-96.6453,39.5088],[-96.6461,39.5029],[-96.649,39.5043],[-96.655,39.504],[-96.6587,39.5],[-96.6643,39.4896],[-96.6657,39.4828],[-96.6683,39.4756],[-96.6725,39.4725],[-96.676,39.4739],[-96.6783,39.4771],[-96.6813,39.4794],[-96.6842,39.4804],[-96.6897,39.4755],[-96.6922,39.4696],[-96.6906,39.4637],[-96.6931,39.4606],[-96.699,39.4602],[-96.702,39.4607],[-96.7116,39.459],[-96.7177,39.4537],[-96.7202,39.4482],[-96.7227,39.4415],[-96.7211,39.4365],[-96.72,39.4324],[-96.7224,39.4306],[-96.723,39.4306],[-96.7254,39.4297],[-96.7284,39.4275],[-96.7279,39.4243],[-96.7267,39.4239],[-96.7238,39.422],[-96.721,39.4152],[-96.7236,39.408],[-96.7272,39.4066],[-96.7226,39.3998],[-96.7128,39.3869],[-96.7022,39.3791],[-96.6905,39.3739],[-96.6864,39.368],[-96.6835,39.3657],[-96.6774,39.3479],[-96.6677,39.3342],[-96.6613,39.3254],[-96.6521,39.3131],[-96.6335,39.2978],[-96.6366,39.2943],[-96.6302,39.2869],[-96.625,39.2805],[-96.6175,39.2731],[-96.6116,39.2694],[-96.6005,39.2647],[-96.5964,39.2619],[-96.5882,39.2563],[-96.5849,39.2477],[-96.5777,39.2503],[-96.5806,39.2521],[-96.5817,39.2562],[-96.5769,39.2553],[-96.5724,39.2457],[-96.5713,39.2443],[-96.5879,39.2454],[-96.584,39.235],[-96.5649,39.2406],[-96.5568,39.2291],[-96.5557,39.2291],[-96.5539,39.2263],[-96.5523,39.2222],[-96.5494,39.2172],[-96.5477,39.2149],[-96.5436,39.213],[-96.5395,39.2103],[-96.5323,39.2133],[-96.5241,39.2082],[-96.5195,39.2027],[-96.522,39.1995],[-96.5304,39.1951],[-96.537,39.1952],[-96.5484,39.1909],[-96.549,39.19],[-96.5485,39.1864],[-96.5486,39.1827],[-96.5486,39.1818],[-96.5457,39.1813],[-96.5427,39.1813],[-96.5349,39.183],[-96.5229,39.1873],[-96.5152,39.189],[-96.5165,39.1831],[-96.5185,39.1764],[-96.515,39.174],[-96.5127,39.1708],[-96.5087,39.1671],[-96.5051,39.1657],[-96.5039,39.1657],[-96.4998,39.1661],[-96.4961,39.1692],[-96.4911,39.1777],[-96.4822,39.1794],[-96.48,39.173],[-96.4795,39.1694],[-96.4766,39.1648],[-96.4713,39.1647],[-96.4623,39.1673],[-96.4581,39.169],[-96.4611,39.1709],[-96.4628,39.1736],[-96.465,39.1782],[-96.4642,39.1841],[-96.4629,39.1913],[-96.4504,39.1893],[-96.4398,39.1878],[-96.4327,39.1863],[-96.4215,39.1843],[-96.4038,39.179],[-96.3951,39.1734],[-96.3898,39.172],[-96.3917,39.0437],[-96.5044,39.0424],[-96.5018,39.0705],[-96.7063,39.0722],[-96.7064,39.0926],[-96.7129,39.0905],[-96.7177,39.0905],[-96.7231,39.0888],[-96.7249,39.0865],[-96.7261,39.0852],[-96.7338,39.0835],[-96.7417,39.0791],[-96.7486,39.0864],[-96.8518,39.0865],[-96.851,39.1196],[-96.8507,39.1327],[-96.8499,39.2188],[-96.898,39.2195],[-96.9135,39.2197],[-96.9242,39.2198],[-96.9622,39.2203],[-96.9609,39.3082],[-96.9638,39.5667],[-96.8062,39.5669]]]}}]}","volume":"82","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Brookins, Douglas G.","contributorId":87144,"corporation":false,"usgs":true,"family":"Brookins","given":"Douglas","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":830912,"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":830913,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70227162,"text":"70227162 - 1971 - Structure and petrology of the alpine-type peridotite at Burro Mountain, California, U.S.A.","interactions":[],"lastModifiedDate":"2021-12-31T15:48:46.538897","indexId":"70227162","displayToPublicDate":"1971-06-01T09:43:33","publicationYear":"1971","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":"Structure and petrology of the alpine-type peridotite at Burro Mountain, California, U.S.A.","docAbstract":"<p class=\"chapter-para\">The alpine-type peridotite at Burro Mountain is a partially serpentinized harzburgite-dunite body approximately 2 km in diameter. It lies in a chaotic<span>&nbsp;</span><i>mélange</i><span>&nbsp;</span>derived from the Franciscan Formation (Upper Jurassic to Upper Cretaceous) of the southern Coast Ranges of California. The peridotite is bounded on the east by a vertical fault in the Nacimiento fault zone that brings sedimentary rocks of Taliaferro's (1943<i>b</i>) Asuncion Group (Upper Cretaceous) into contact with the peridotite. The peridotite appears to be one of a number of tectonic lenses, having a wide range in size, that make up the<span>&nbsp;</span><i>mélange</i>. These lenses include metagraywacke, metachert, greenstone, amphibolite, and blueschist, as well as ultramafic rocks, and represent a wide range of pressure-temperature environments.</p><p class=\"chapter-para\">The outer shell of the peridotite is a sheared serpentinite zone 10–15 m thick. The peridotite was tectonically emplaced at its present level as a cold solid mass and had little effect on the mineral assemblages of the Franciscan Formation. Local development of lawsonite and aragonite in shear zones may be related to the peridotite emplacement.</p><p class=\"chapter-para\">Foliated harzburgite forms approximately 60 per cent of the peridotite. It is a lithologically uniform rock that has an olivine: orthopyroxene ratio of approximately 75:25. Accessory clinopyroxene and chromian spinel generally make up less than 5 per cent of the harzburgite. Dunite, composed of olivine, accessory chromian spinel (&lt; 5 per cent), and trace amounts of pyroxene, makes up approximately 40 per cent of the peridotite and occurs as dikes, sills, and irregular bodies in the harzburgite.</p><p class=\"chapter-para\">Olivine and pyroxene show small but significant compositional variations and chromian spinel shows a large range in the cation ratio Cr/(Cr+Al+ Fe<sup>3+</sup>). The compositional variations in these minerals are related to original differences in bulk chemical composition. The following compositional ranges were determined for minerals in the harzburgite: olivine, Fo<sub>91.1</sub>−Fo<sub>91.4</sub>; orthopyroxene, En<sub>89.8</sub>−En<sub>91.1</sub>; clinopyroxene, Ca<sub>47.0</sub>Mg<sub>50.0</sub>Fe<sub>3.0</sub>−Ca<sub>48.7</sub>Mg<sub>48.2</sub>Fe<sub>3.1</sub>; chromian spinel, Cr/(Cr+Al+Fe<sup>3+</sup>) 0.37−0.55. The pyroxenes have a range in A1<sub>2</sub>O<sub>3</sub><span>&nbsp;</span>content of 1.3−3.0 wt per cent. Olivine from dunite ranges from Fo<sub>91</sub><span>&nbsp;</span>to Fo<sub>92 7</sub><span>&nbsp;</span>and the chromian spinel has a range in the Cr/(Cr+Al+Fe<sup>3+</sup>) ratio of 0.30−0.75. Although all the dunites are lithologically similar, three distinct types are recognized on the basis of composition of coexisting olivine and chromian spinel. Structural relations between the three types of dunite suggest three periods of emplacement (possibly overlapping) of dunite into harzburgite. The evidence indicates that the dunite, and probably also the harzburgite crystallized from an ultramafic magma, probably in the upper mantle.</p><p class=\"chapter-para\">After the magmatic episode and crystallization, the peridotite was subjected to a deep-seated plastic deformation and recrystallization. The first phase of the deformation produced a pervasive, planar structural element (S<sub>1</sub>) that crosscuts many harzburgite-dunite contacts. It is probable that some of the dunite sills were emplaced during this deformation. The foliation, S<sub>1</sub>, is defined by layers of different orthopyroxene content in harzburgite, and by discontinuous layers of chromian spinel in dunite. Flow or slip along S<sub>1</sub><span>&nbsp;</span>produced slip folds in harzburgite—dunite contacts with axial planes parallel to S<sub>1</sub>. At a later stage, isoclinal folds developed in S<sub>1</sub>, and the present olivine microfabric was probably formed by recrystallization in the stress field that produced the isoclinal folding. In the olivine microfabric,<span>&nbsp;</span><i>X</i><span>&nbsp;</span>tends to be perpendicular to the axial planes (S<sub>2</sub>) of the isoclinal folds and<span>&nbsp;</span><i>Y</i><span>&nbsp;</span>and<span>&nbsp;</span><i>Z</i><span>&nbsp;</span>tend to form double maxima in S<sub>2</sub><span>&nbsp;</span>approximately 90° apart. Mg−Fe<sup>2+</sup><span>&nbsp;</span>distribution between coexisting mineral pairs yields a calculated temperature of formation of approximately 1200 °C. Although this temperature is only a nominal value, it indicates that the mineral pairs equilibrated at a significantly high temperature. In view of the deformation and recrystallization, the calculated temperature possibly represents subsolidus re-equilibration of the minerals during this event. The deformation and recrystallization probably occurred shortly after crystallization while the peridotite was still at a high temperature.</p><p class=\"chapter-para\">A later deep-seated deformation produced small scattered kink folds in S<sub>1</sub><span>&nbsp;</span>that tend to disrupt the major olivine microfabric. The kink folding was accompanied or followed by the development of kink bands in olivine that reflect intragranular gliding on the system<span>&nbsp;</span><i>T</i><span>&nbsp;</span>= [<i>Okl</i>],<span>&nbsp;</span><i>t</i><span>&nbsp;</span>= [100]. The kink bands probably formed at a minimum temperature of 1000 °C.</p><p class=\"chapter-para\">Following the deep-seated deformation, which probably took place in the mantle, the peridotite mass was tectonically detached and moved upward to its present level in the crust. Cleavages, joints, and faults provided channels for water to pervade the peridotite and allow alteration of the primary minerals.</p>","language":"English","publisher":"Oxford University Press","doi":"10.1093/petrology/12.2.245","usgsCitation":"Loney, R.A., Himmelberg, G.R., and Coleman, R.G., 1971, Structure and petrology of the alpine-type peridotite at Burro Mountain, California, U.S.A.: Economic Geology, v. 12, no. 2, p. 245-309, https://doi.org/10.1093/petrology/12.2.245.","productDescription":"25 p.","startPage":"245","endPage":"309","costCenters":[],"links":[{"id":393721,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Burro Mountain","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -121.27309799194335,\n              35.855178783203776\n            ],\n            [\n              -121.26039505004883,\n              35.86387402899189\n            ],\n            [\n              -121.25739097595213,\n              35.86554340703446\n            ],\n            [\n              -121.25335693359374,\n              35.863178444429494\n            ],\n            [\n              -121.24717712402344,\n              35.86463916495963\n            ],\n            [\n              -121.24168395996095,\n              35.86672586187277\n            ],\n            [\n              -121.25730514526366,\n              35.87222056756162\n            ],\n            [\n              -121.26640319824219,\n              35.87708897573244\n            ],\n            [\n              -121.2776470184326,\n              35.87966215633466\n            ],\n            [\n              -121.28597259521484,\n              35.8764630542986\n            ],\n            [\n              -121.28906250000001,\n              35.87333337294745\n            ],\n            [\n              -121.28957748413085,\n              35.86554340703446\n            ],\n            [\n              -121.28442764282228,\n              35.859561306299426\n            ],\n            [\n              -121.27309799194335,\n              35.855178783203776\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"12","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Loney, R. A.","contributorId":90757,"corporation":false,"usgs":true,"family":"Loney","given":"R.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":829859,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Himmelberg, G. R.","contributorId":27106,"corporation":false,"usgs":true,"family":"Himmelberg","given":"G.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":829860,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Coleman, R. G.","contributorId":75170,"corporation":false,"usgs":true,"family":"Coleman","given":"R.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":829861,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70227161,"text":"70227161 - 1971 - A chemical study of serpentinization — Burro Mountain, California","interactions":[],"lastModifiedDate":"2021-12-31T15:39:51.534407","indexId":"70227161","displayToPublicDate":"1971-06-01T09:30:10","publicationYear":"1971","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2420,"text":"Journal of Petrology","active":true,"publicationSubtype":{"id":10}},"title":"A chemical study of serpentinization — Burro Mountain, California","docAbstract":"<p class=\"chapter-para\">Serpentinized dunites and harzburgites from the Burro Mountain peridotite show no change in the ratio of iron and magnesia to silica when compared with the same ratio for the unserpentinized equivalents. The mineral assemblage resulting from serpentinization consists of lizardite-chrysotile, brucite, and magnetite and is determined by the original bulk composition of the peridotite. The chemical and mineralogical data indicate that serpentinization proceeded under isochemical conditions except for the introduction of water into the peridotite. Expansion accompanies serpentinization because the serpentine products occupy a greater volume than the peridotite protolith. Tectonic emplacement of the Burro Mountain peridotite was facilitated by serpentinization and the attendant expansion.</p>","language":"English","publisher":"Oxford University Press","doi":"10.1093/petrology/12.2.311","usgsCitation":"Coleman, R.G., and Keith, T., 1971, A chemical study of serpentinization — Burro Mountain, California: Journal of Petrology, v. 12, no. 2, p. 311-328, https://doi.org/10.1093/petrology/12.2.311.","productDescription":"18 p.","startPage":"311","endPage":"328","costCenters":[],"links":[{"id":393720,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Burro Mountain","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -121.27309799194335,\n              35.855178783203776\n            ],\n            [\n              -121.26039505004883,\n              35.86387402899189\n            ],\n            [\n              -121.25739097595213,\n              35.86554340703446\n            ],\n            [\n              -121.25335693359374,\n              35.863178444429494\n            ],\n            [\n              -121.24717712402344,\n              35.86463916495963\n            ],\n            [\n              -121.24168395996095,\n              35.86672586187277\n            ],\n            [\n              -121.25730514526366,\n              35.87222056756162\n            ],\n            [\n              -121.26640319824219,\n              35.87708897573244\n            ],\n            [\n              -121.2776470184326,\n              35.87966215633466\n            ],\n            [\n              -121.28597259521484,\n              35.8764630542986\n            ],\n            [\n              -121.28906250000001,\n              35.87333337294745\n            ],\n            [\n              -121.28957748413085,\n              35.86554340703446\n            ],\n            [\n              -121.28442764282228,\n              35.859561306299426\n            ],\n            [\n              -121.27309799194335,\n              35.855178783203776\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"12","issue":"2","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Coleman, R. G.","contributorId":75170,"corporation":false,"usgs":true,"family":"Coleman","given":"R.","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":829857,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Keith, T. E.","contributorId":33693,"corporation":false,"usgs":true,"family":"Keith","given":"T. E.","affiliations":[],"preferred":false,"id":829858,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
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