{"pageNumber":"5844","pageRowStart":"146075","pageSize":"25","recordCount":165658,"records":[{"id":64477,"text":"i533A - 1968 - Transcontinental geophysical survey (35°-39° N) magnetic map from 100° to 112° W longitude","interactions":[],"lastModifiedDate":"2021-10-18T18:36:27.975217","indexId":"i533A","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":320,"text":"IMAP","code":"I","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"533","chapter":"A","title":"Transcontinental geophysical survey (35°-39° N) magnetic map from 100° to 112° W longitude","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/i533A","usgsCitation":"Zietz, I., and Kirby, J., 1968, Transcontinental geophysical survey (35°-39° N) magnetic map from 100° to 112° W longitude: U.S. Geological Survey IMAP 533, 1 Plate: 46.51 × 25.67 inches, https://doi.org/10.3133/i533A.","productDescription":"1 Plate: 46.51 × 25.67 inches","costCenters":[],"links":[{"id":390616,"rank":4,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_22881.htm"},{"id":254958,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/imap/0533a/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":254957,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/imap/0533a/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":254959,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/imap/0533a/report-thumb.jpg"}],"scale":"1000000","country":"United States","state":"Arizona, Colorado, Kansas, New Mexico, Oklahoma, Texas, Utah","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -112,35 ], [ -112,39 ], [ -100,39 ], [ -100,35 ], [ -112,35 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a4de4b07f02db626f74","contributors":{"authors":[{"text":"Zietz, Isidore","contributorId":76708,"corporation":false,"usgs":true,"family":"Zietz","given":"Isidore","affiliations":[],"preferred":false,"id":271020,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kirby, J.R.","contributorId":6428,"corporation":false,"usgs":true,"family":"Kirby","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":271019,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":64478,"text":"i534A - 1968 - Transcontinental geophysical survey (35°-39° N) magnetic map from 87° to 100° W longitude","interactions":[],"lastModifiedDate":"2021-10-18T18:41:37.606542","indexId":"i534A","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":320,"text":"IMAP","code":"I","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"534","chapter":"A","title":"Transcontinental geophysical survey (35°-39° N) magnetic map from 87° to 100° W longitude","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/i534A","usgsCitation":"Zietz, I., and Kirby, J., 1968, Transcontinental geophysical survey (35°-39° N) magnetic map from 87° to 100° W longitude: U.S. Geological Survey IMAP 534, 1 Plate: 50.46 × 26.56 inches, https://doi.org/10.3133/i534A.","productDescription":"1 Plate: 50.46 × 26.56 inches","costCenters":[],"links":[{"id":390617,"rank":4,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_22882.htm"},{"id":254962,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/imap/0534a/report-thumb.jpg"},{"id":254961,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/imap/0534a/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":254960,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/imap/0534a/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}}],"scale":"1000000","country":"United States","state":"Arkansas, Illinois, Indiana, Kansas, Kentucky, Missouri, Oklahoma, Tennessee, Texas","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -100,35 ], [ -100,39 ], [ -87,39 ], [ -87,35 ], [ -100,35 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a4de4b07f02db6270b7","contributors":{"authors":[{"text":"Zietz, Isidore","contributorId":76708,"corporation":false,"usgs":true,"family":"Zietz","given":"Isidore","affiliations":[],"preferred":false,"id":271022,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kirby, J.R.","contributorId":6428,"corporation":false,"usgs":true,"family":"Kirby","given":"J.R.","email":"","affiliations":[],"preferred":false,"id":271021,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":15648,"text":"ofr68229 - 1968 - Geology and lode gold deposits of the Nuka Bay area, Kenai Peninsula, Alaska","interactions":[{"subject":{"id":15648,"text":"ofr68229 - 1968 - Geology and lode gold deposits of the Nuka Bay area, Kenai Peninsula, Alaska","indexId":"ofr68229","publicationYear":"1968","noYear":false,"title":"Geology and lode gold deposits of the Nuka Bay area, Kenai Peninsula, Alaska"},"predicate":"SUPERSEDED_BY","object":{"id":39672,"text":"pp625B - 1970 - Geology and lode-gold deposits of the Nuka Bay area, Kenai Peninsula, Alaska","indexId":"pp625B","publicationYear":"1970","noYear":false,"chapter":"B","title":"Geology and lode-gold deposits of the Nuka Bay area, Kenai Peninsula, Alaska"},"id":1}],"supersededBy":{"id":39672,"text":"pp625B - 1970 - Geology and lode-gold deposits of the Nuka Bay area, Kenai Peninsula, Alaska","indexId":"pp625B","publicationYear":"1970","noYear":false,"title":"Geology and lode-gold deposits of the Nuka Bay area, Kenai Peninsula, Alaska"},"lastModifiedDate":"2023-07-24T20:55:05.501281","indexId":"ofr68229","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"68-229","title":"Geology and lode gold deposits of the Nuka Bay area, Kenai Peninsula, Alaska","docAbstract":"<p>Nuka Bay is a deep, T-shaped fiord on the southeast coast of the Kenai Peninsula approximately 60 miles southwest of the port of Seward. Gold-bearing quartz veins were discovered in the area in 1918, and between 1920 and 1940 several small mines were in operation around the North and West Arms of the bay. Estimated total production may have been as much as $164,000.</p><p>Bedrock in the Nuka Bay area is a thick Cretaceous section of interbedded slate and graywacke that has been regionally deformed into a series of relatively open, but overturned, folds plunging at low angler to the north-northeast. Except at the folds, bedding and foliation (slaty cleavage) are parallel and dip steeply to the northwest. Small granodiorite dikes fill tensional cross joints in the folded sediments, and a few granodiorite sills are intruded along bedding and foliation planes.</p><p>Quartz veins are abundant throughout the region, but contain significant amounts of gold only in a relatively small area, 8 miles long and 6 miles wide, around North and West Arms. The veins are generally less than 5 feet wide and 300 feet long and consist chiefly of massive white quartz. Arsenopyrite with minor amounts of other sulfide&nbsp;and native gold occurs as irregular masses and pods in the quartz. The larger and more productive veins dip steeply and strike east-west, almost normal to the regional structure, and appear to be confined to competent graywacke beds or dikes. Random channel sampling of the quartz veins indicates gold values as high as 9 ounces per ton across zones as wide as 2 feet.</p><p>A study of the stream sediments throughout the area disclosed several drainages with detectable gold; one, Babcock Creek, contained 0.5 ppm gold, the others from 0.02 to 0.07 ppm. No base metal anomalies were detected. The area appears to warrant further investigation as a potential producer of small amounts of gold. Diligent smell-scale mining may be economically feasible.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr68229","usgsCitation":"Richter, D.H., 1968, Geology and lode gold deposits of the Nuka Bay area, Kenai Peninsula, Alaska: U.S. Geological Survey Open-File Report 68-229, iv, 52 p., https://doi.org/10.3133/ofr68229.","productDescription":"iv, 52 p.","costCenters":[],"links":[{"id":419268,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1968/0229/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":146904,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1968/0229/report-thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Kenai Peninsula, Nuka Bay area","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -150.66230433486226,\n              59.562476930416636\n            ],\n            [\n              -150.66230433486226,\n              59.302789270633326\n            ],\n            [\n              -150.29991099261446,\n              59.302789270633326\n            ],\n            [\n              -150.29991099261446,\n              59.562476930416636\n            ],\n            [\n              -150.66230433486226,\n              59.562476930416636\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ad9e4b07f02db685281","contributors":{"authors":[{"text":"Richter, Donald H.","contributorId":61021,"corporation":false,"usgs":true,"family":"Richter","given":"Donald","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":171491,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":41835,"text":"ofr68286 - 1968 - Aeromagnetic map of part of the Jarbidge quadrangle, Elko County, Nevada","interactions":[],"lastModifiedDate":"2025-07-25T19:23:30.572851","indexId":"ofr68286","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"68-286","title":"Aeromagnetic map of part of the Jarbidge quadrangle, Elko County, Nevada","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr68286","usgsCitation":"Petrafeso, F.A., and Long, C.L., 1968, Aeromagnetic map of part of the Jarbidge quadrangle, Elko County, Nevada: U.S. Geological Survey Open-File Report 68-286, 1 Plate: 28.05 x 40.89 inches, https://doi.org/10.3133/ofr68286.","productDescription":"1 Plate: 28.05 x 40.89 inches","costCenters":[],"links":[{"id":492937,"rank":3,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_8284.htm","linkFileType":{"id":5,"text":"html"}},{"id":79557,"rank":2,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1968/0286/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":169032,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"scale":"62500","country":"United States","state":"Nevada","county":"Elko County","otherGeospatial":"Jarbidge quadrangle","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -115.5,\n              42\n            ],\n            [\n              -115.5,\n              41.5\n            ],\n            [\n              -115,\n              41.5\n            ],\n            [\n              -115,\n              42\n            ],\n            [\n              -115.5,\n              42\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4afee4b07f02db6979b5","contributors":{"authors":[{"text":"Petrafeso, F. A.","contributorId":50874,"corporation":false,"usgs":true,"family":"Petrafeso","given":"F.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":225598,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Long, C. L.","contributorId":98699,"corporation":false,"usgs":true,"family":"Long","given":"C.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":225599,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":14412,"text":"ofr68155 - 1968 - Preliminary lunar exploration plan of the Marius Hills region of the moon","interactions":[],"lastModifiedDate":"2025-06-17T15:14:39.705738","indexId":"ofr68155","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"68-155","title":"Preliminary lunar exploration plan of the Marius Hills region of the moon","docAbstract":"<p>This report presents a preliminary Lunar Exploration Plan (LEP) for the Marius Hills region of the Moon. The Marius Hills region is one of the six sites considered by the GLEP site selection group as a candidate for manned exploration using mobility systems allowing a radius of operation of at least 5 km. The 3-day mission considered for the Marius Hills region is based on the use of one lunar roving vehicle (LRV) and two lunar flying units (LFU's) and allows for four extravehicular activities (EVA's) of 3 hours each.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr68155","usgsCitation":"Karlstrom, T.N., McCauley, J.F., and Swann, G., 1968, Preliminary lunar exploration plan of the Marius Hills region of the moon: U.S. Geological Survey Open-File Report 68-155, Report: iv, 42 p.; 3 Plates: 30.06 x 20.91 inches or smaller, https://doi.org/10.3133/ofr68155.","productDescription":"Report: iv, 42 p.; 3 Plates: 30.06 x 20.91 inches or smaller","costCenters":[],"links":[{"id":490838,"rank":5,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1968/0155/plate-3.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":490837,"rank":4,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1968/0155/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":490836,"rank":3,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1968/0155/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":490835,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1968/0155/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":147682,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1968/0155/report-thumb.jpg"}],"scale":"25000","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ab0e4b07f02db66d8d8","contributors":{"authors":[{"text":"Karlstrom, Thor Nels Vincent","contributorId":35183,"corporation":false,"usgs":true,"family":"Karlstrom","given":"Thor","email":"","middleInitial":"Nels Vincent","affiliations":[],"preferred":false,"id":169412,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"McCauley, John Francis","contributorId":85199,"corporation":false,"usgs":true,"family":"McCauley","given":"John","email":"","middleInitial":"Francis","affiliations":[],"preferred":false,"id":169413,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Swann, G.A.","contributorId":8859,"corporation":false,"usgs":true,"family":"Swann","given":"G.A.","email":"","affiliations":[],"preferred":false,"id":169411,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":41046,"text":"ofr68312 - 1968 - Piezometric surface of principal artesian aquifer in coastal area of Georgia, December 1966","interactions":[],"lastModifiedDate":"2022-05-18T16:05:30.110937","indexId":"ofr68312","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"68-312","title":"Piezometric surface of principal artesian aquifer in coastal area of Georgia, December 1966","docAbstract":"<p>No abstract available.&nbsp;</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr68312","collaboration":"Prepared in cooperation with the Georgia Department of Mines, Mining and Geology, Chatham County, City of Savannah, Glynn County, and City of Brunswick","usgsCitation":"Wait, R.L., and Gregg, D.O., 1968, Piezometric surface of principal artesian aquifer in coastal area of Georgia, December 1966: U.S. Geological Survey Open-File Report 68-312, 1 Plate: 32.71 x 48.62 inches, https://doi.org/10.3133/ofr68312.","productDescription":"1 Plate: 32.71 x 48.62 inches","costCenters":[{"id":13634,"text":"South Atlantic Water Science Center","active":true,"usgs":true}],"links":[{"id":135273,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1968/0312/report-thumb.jpg"},{"id":400712,"rank":2,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1968/0312/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","state":"Georgia","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -81.6064453125,\n              30.675715404167743\n            ],\n            [\n              -80.85937499999999,\n              30.675715404167743\n            ],\n            [\n              -80.85937499999999,\n              32.43561304116276\n            ],\n            [\n              -81.6064453125,\n              32.43561304116276\n            ],\n            [\n              -81.6064453125,\n              30.675715404167743\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4adae4b07f02db68589c","contributors":{"authors":[{"text":"Wait, R. L.","contributorId":15988,"corporation":false,"usgs":true,"family":"Wait","given":"R.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":224381,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gregg, D. O.","contributorId":17966,"corporation":false,"usgs":true,"family":"Gregg","given":"D.","email":"","middleInitial":"O.","affiliations":[],"preferred":false,"id":224382,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":42134,"text":"ofr68290 - 1968 - Aeromagnetic map of the southern part of the Norths Ranch quadrangle, Humboldt County, Nevada","interactions":[],"lastModifiedDate":"2025-07-25T19:50:33.45786","indexId":"ofr68290","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"68-290","title":"Aeromagnetic map of the southern part of the Norths Ranch quadrangle, Humboldt County, Nevada","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr68290","usgsCitation":"Petrafeso, F.A., and Long, C.L., 1968, Aeromagnetic map of the southern part of the Norths Ranch quadrangle, Humboldt County, Nevada: U.S. Geological Survey Open-File Report 68-290, 1 Plate: 31.52 x 40.52 inches, https://doi.org/10.3133/ofr68290.","productDescription":"1 Plate: 31.52 x 40.52 inches","costCenters":[],"links":[{"id":492940,"rank":3,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_8289.htm","linkFileType":{"id":5,"text":"html"}},{"id":176876,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":79866,"rank":2,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1968/0290/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}}],"scale":"62500","country":"United States","state":"Nevada","county":"Humboldt County","otherGeospatial":"Norths Ranch quadrangle","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -117.5,\n              41.294\n            ],\n            [\n              -117.5,\n              41\n            ],\n            [\n              -117,\n              41\n            ],\n            [\n              -117,\n              41.294\n            ],\n            [\n              -117.5,\n              41.294\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae6e4b07f02db68b4aa","contributors":{"authors":[{"text":"Petrafeso, F. A.","contributorId":50874,"corporation":false,"usgs":true,"family":"Petrafeso","given":"F.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":225983,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Long, C. L.","contributorId":98699,"corporation":false,"usgs":true,"family":"Long","given":"C.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":225984,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":68583,"text":"ha259 - 1968 - Water resources and surficial geology of the Mendenhall Valley, Alaska","interactions":[],"lastModifiedDate":"2022-04-13T19:45:38.699944","indexId":"ha259","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":318,"text":"Hydrologic Atlas","code":"HA","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"259","title":"Water resources and surficial geology of the Mendenhall Valley, Alaska","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ha259","usgsCitation":"Barnwell, W.W., and Boning, C.W., 1968, Water resources and surficial geology of the Mendenhall Valley, Alaska: U.S. Geological Survey Hydrologic Atlas 259, Report: 6 p.; 4 Plates: 32.50 × 45.00 inches or smaller, https://doi.org/10.3133/ha259.","productDescription":"Report: 6 p.; 4 Plates: 32.50 × 45.00 inches or smaller","costCenters":[],"links":[{"id":398671,"rank":7,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_15626.htm"},{"id":90225,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/ha/259/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":90224,"rank":403,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/ha/259/plate-4.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":90223,"rank":402,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/ha/259/plate-3.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":90222,"rank":401,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/ha/259/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":90221,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/ha/259/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":190100,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/ha/259/report-thumb.jpg"}],"scale":"31680","country":"United States","state":"Alaska","otherGeospatial":"Mendenhall Valley","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -134.637,\n              58.34\n            ],\n            [\n              -134.517,\n              58.34\n            ],\n            [\n              -134.517,\n              58.435\n            ],\n            [\n              -134.637,\n              58.435\n            ],\n            [\n              -134.637,\n              58.34\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49b9e4b07f02db5cde13","contributors":{"authors":[{"text":"Barnwell, William W.","contributorId":73621,"corporation":false,"usgs":true,"family":"Barnwell","given":"William","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":278515,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Boning, Charles W.","contributorId":86345,"corporation":false,"usgs":true,"family":"Boning","given":"Charles","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":278516,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":63806,"text":"gp620 - 1968 - Aeromagnetic map of the Warren quadrangle, Worcester, Hampden, and Hampshire Counties, Massachusetts","interactions":[],"lastModifiedDate":"2026-01-22T18:50:53.19875","indexId":"gp620","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":317,"text":"Geophysical Investigations Map","code":"GP","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"620","title":"Aeromagnetic map of the Warren quadrangle, Worcester, Hampden, and Hampshire Counties, Massachusetts","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/gp620","usgsCitation":"Water Resources Division, U.S. Geological Survey, 1968, Aeromagnetic map of the Warren quadrangle, Worcester, Hampden, and Hampshire Counties, Massachusetts: U.S. Geological Survey Geophysical Investigations Map 620, 1 Plate: 23.51 x 29.18 inches, https://doi.org/10.3133/gp620.","productDescription":"1 Plate: 23.51 x 29.18 inches","costCenters":[],"links":[{"id":490886,"rank":4,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_5987.htm","linkFileType":{"id":5,"text":"html"}},{"id":250028,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/gp/0620/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":250029,"rank":3,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/gp/0620/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":253497,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/gp/0620/report-thumb.jpg"}],"scale":"24000","country":"United States","state":"Massachusetts","county":"Hampden County, Hampshire County, Worcester County","otherGeospatial":"Warren quadrangle","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -72.25,\n              42.25\n            ],\n            [\n              -72.25,\n              42.125\n            ],\n            [\n              -72.125,\n              42.125\n            ],\n            [\n              -72.125,\n              42.25\n            ],\n            [\n              -72.25,\n              42.25\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae7e4b07f02db68c077","contributors":{"authors":[{"text":"Water Resources Division, U.S. Geological Survey","contributorId":128075,"corporation":true,"usgs":false,"organization":"Water Resources Division, U.S. Geological Survey","id":533275,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":14370,"text":"ofr68153 - 1968 - Potential for potash and other evaporite mineral resources in West Pakistan","interactions":[{"subject":{"id":14370,"text":"ofr68153 - 1968 - Potential for potash and other evaporite mineral resources in West Pakistan","indexId":"ofr68153","publicationYear":"1968","noYear":false,"title":"Potential for potash and other evaporite mineral resources in West Pakistan"},"predicate":"SUPERSEDED_BY","object":{"id":39568,"text":"pp700D - 1970 - Geological Survey research 1970, Chapter D","indexId":"pp700D","publicationYear":"1970","noYear":false,"chapter":"D","title":"Geological Survey research 1970, Chapter D"},"id":1}],"supersededBy":{"id":39568,"text":"pp700D - 1970 - Geological Survey research 1970, Chapter D","indexId":"pp700D","publicationYear":"1970","noYear":false,"title":"Geological Survey research 1970, Chapter D"},"lastModifiedDate":"2025-06-17T15:21:11.425833","indexId":"ofr68153","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"68-153","title":"Potential for potash and other evaporite mineral resources in West Pakistan","docAbstract":"<p>Reconnaissance examination of marine evaporites in West Pakistan has revealed a highly favorable resource situation with respect to anhydrite, and a potentially favorable position for potash and sulfur. Further work is needed to evaluate the preliminary interpretations made during the present study. The establishment of a potash resource organization within the Mineral Resource Directorate of the Geological Survey of Pakistan is proposed. The organization would be concerned exclusively with the investigation of potash deposits in the Salt Range and adjacent parts of the Potwar and Indus Plains.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr68153","usgsCitation":"Jones, C., 1968, Potential for potash and other evaporite mineral resources in West Pakistan: U.S. Geological Survey Open-File Report 68-153, i, 18 p., https://doi.org/10.3133/ofr68153.","productDescription":"i, 18 p.","costCenters":[],"links":[{"id":490839,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1968/0153/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":147592,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1968/0153/report-thumb.jpg"}],"country":"Pakistan","geographicExtents":"{\"type\":\"FeatureCollection\",\"features\":[{\"type\":\"Feature\",\"geometry\":{\"type\":\"Polygon\",\"coordinates\":[[[75.15803,37.13303],[75.8969,36.66681],[76.19285,35.8984],[77.83745,35.49401],[76.87172,34.65354],[75.75706,34.50492],[74.2402,34.74889],[73.74995,34.3177],[74.10429,33.44147],[74.45156,32.7649],[75.25864,32.27111],[74.40593,31.69264],[74.42138,30.97981],[73.45064,29.97641],[72.82375,28.96159],[71.77767,27.91318],[70.6165,27.9892],[69.51439,26.94097],[70.16893,26.49187],[70.28287,25.72223],[70.8447,25.2151],[71.04324,24.35652],[68.8426,24.35913],[68.17665,23.69197],[67.44367,23.94484],[67.14544,24.66361],[66.37283,25.42514],[64.53041,25.23704],[62.9057,25.21841],[61.49736,25.07824],[61.87419,26.23997],[63.31663,26.75653],[63.2339,27.21705],[62.75543,27.37892],[62.72783,28.25964],[61.77187,28.69933],[61.36931,29.30328],[60.87425,29.82924],[62.54986,29.31857],[63.55026,29.46833],[64.148,29.34082],[64.35042,29.56003],[65.04686,29.47218],[66.34647,29.88794],[66.38146,30.7389],[66.93889,31.30491],[67.68339,31.30315],[67.79269,31.58293],[68.55693,31.71331],[68.92668,31.62019],[69.31776,31.90141],[69.26252,32.50194],[69.68715,33.1055],[70.32359,33.35853],[69.93054,34.02012],[70.8818,33.98886],[71.15677,34.34891],[71.11502,34.73313],[71.61308,35.1532],[71.49877,35.65056],[71.26235,36.07439],[71.84629,36.50994],[72.92002,36.72001],[74.06755,36.83618],[74.57589,37.02084],[75.15803,37.13303]]]},\"properties\":{\"name\":\"Pakistan\"}}]}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ad5e4b07f02db6837e8","contributors":{"authors":[{"text":"Jones, C.L.","contributorId":60218,"corporation":false,"usgs":true,"family":"Jones","given":"C.L.","email":"","affiliations":[],"preferred":false,"id":169342,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":15098,"text":"ofr68192 - 1968 - Infrared imagery and radiometry - Summary report, December 1967","interactions":[],"lastModifiedDate":"2025-06-23T17:07:12.714912","indexId":"ofr68192","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"68-192","title":"Infrared imagery and radiometry - Summary report, December 1967","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr68192","usgsCitation":"Moxham, R.M., Greene, G., Friedman, J.D., and Gawarecki, S., 1968, Infrared imagery and radiometry - Summary report, December 1967: U.S. Geological Survey Open-File Report 68-192, 28 p., https://doi.org/10.3133/ofr68192.","productDescription":"28 p.","costCenters":[],"links":[{"id":148083,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1968/0192/report-thumb.jpg"},{"id":491117,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1968/0192/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49f1e4b07f02db5ee52a","contributors":{"authors":[{"text":"Moxham, Robert M.","contributorId":56210,"corporation":false,"usgs":true,"family":"Moxham","given":"Robert","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":170563,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Greene, G.W.","contributorId":38170,"corporation":false,"usgs":true,"family":"Greene","given":"G.W.","email":"","affiliations":[],"preferred":false,"id":170562,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Friedman, J. D.","contributorId":99157,"corporation":false,"usgs":true,"family":"Friedman","given":"J.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":170564,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gawarecki, S.J.","contributorId":103297,"corporation":false,"usgs":true,"family":"Gawarecki","given":"S.J.","affiliations":[],"preferred":false,"id":170565,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":62931,"text":"gq686 - 1968 - Geologic map of the Panola quadrangle, Estill and Madison Counties, Kentucky","interactions":[],"lastModifiedDate":"2012-02-10T00:11:01","indexId":"gq686","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":316,"text":"Geologic Quadrangle","code":"GQ","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"686","title":"Geologic map of the Panola quadrangle, Estill and Madison Counties, Kentucky","language":"ENGLISH","doi":"10.3133/gq686","usgsCitation":"Greene, R.C., 1968, Geologic map of the Panola quadrangle, Estill and Madison Counties, Kentucky: U.S. Geological Survey Geologic Quadrangle 686, 1 map :col. ;79 x 109 cm., https://doi.org/10.3133/gq686.","productDescription":"1 map :col. ;79 x 109 cm.","costCenters":[],"links":[{"id":103408,"rank":700,"type":{"id":15,"text":"Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_1994.htm","linkFileType":{"id":5,"text":"html"},"description":"1994"},{"id":249071,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/gq/0686/report.pdf","size":"34","linkFileType":{"id":1,"text":"pdf"}},{"id":251908,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/gq/0686/report-thumb.jpg"}],"scale":"24000","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -84.11749999999999,37.6175 ], [ -84.11749999999999,37.75 ], [ -84,37.75 ], [ -84,37.6175 ], [ -84.11749999999999,37.6175 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4af5e4b07f02db692522","contributors":{"authors":[{"text":"Greene, Robert C.","contributorId":36108,"corporation":false,"usgs":true,"family":"Greene","given":"Robert","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":268070,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":15262,"text":"ofr68206 - 1968 - Subsurface geology of the Silent Canyon caldera, Nevada Test Site, Nevada","interactions":[],"lastModifiedDate":"2025-06-20T18:13:29.768884","indexId":"ofr68206","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"68-206","title":"Subsurface geology of the Silent Canyon caldera, Nevada Test Site, Nevada","docAbstract":"<p>Deep drilling in the vicinity of Silent Canyon on eastern Pahute Mesa, Nevada, has revealed a Tertiary volcanic section locally thicker than 14,000 feet. The area drilled covers most of the Silent Canyon caldera and some of the surrounding area. The caldera is rudely elliptical in plan and measures 10 by 14 miles.</p><p>Except on its east edge, the caldera is completely obscured by younger volcanic rocks, including ash-flow sheets from several other centers. The structure, originally inferred from surface mapping and a 20-mgal gravity low, has been confirmed by drilling at 21 sites.</p><p>Petrographic, chemical, and magnetic studies of more than 4,000 feet of drill core have revealed a complex sequence of volcanic rocks. Precaldera rocks include thick talc-alkalic lavas and tuffs. Peralkaline lavas and tuffs of the Silent Canyon center include the Belted Range Tuff (13-14 m.y.), eruption of which resulted in caldera collapse. The Belted Range Tuff has been downdropped 5,000-7,000 feet in the caldera. Subsequently, the depression was partially filled in the eastern part by genetically related peralkaline lavas and tuffs and in the western part by later calc -alkaline lavas and tuffs apparently genetically unrelated to the peralkaline rocks of the Silent Canyon center. Renewed subsidence probably occurred during their eruption.</p><p>Isopach maps of younger tuffs show that the caldera was topographically low during deposition of later (12.5-7 m.y.) ash-flow sheets from other volcanic centers.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr68206","usgsCitation":"Orkild, P.P., Byers, F., Hoover, D.L., and Sargent, K.A., 1968, Subsurface geology of the Silent Canyon caldera, Nevada Test Site, Nevada: U.S. Geological Survey Open-File Report 68-206, 19 p., https://doi.org/10.3133/ofr68206.","productDescription":"19 p.","costCenters":[],"links":[{"id":491051,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1968/0206/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":147986,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1968/0206/report-thumb.jpg"}],"country":"United States","state":"Nevada","otherGeospatial":"Silent 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Paul P.","contributorId":14441,"corporation":false,"usgs":true,"family":"Orkild","given":"Paul","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":170841,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Byers, F.M. Jr.","contributorId":78338,"corporation":false,"usgs":true,"family":"Byers","given":"F.M.","suffix":"Jr.","affiliations":[],"preferred":false,"id":170844,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hoover, D. L.","contributorId":70388,"corporation":false,"usgs":true,"family":"Hoover","given":"D.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":170843,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sargent, K. A.","contributorId":58630,"corporation":false,"usgs":true,"family":"Sargent","given":"K.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":170842,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":15297,"text":"ofr68210 - 1968 - Summary of results from a trip February 6-March 5, 1966, to B'ir Idimah, Jabal Ashirah, and As Sarat Mountains, Saudi Arabia","interactions":[],"lastModifiedDate":"2025-06-18T15:38:16.577442","indexId":"ofr68210","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"68-210","title":"Summary of results from a trip February 6-March 5, 1966, to B'ir Idimah, Jabal Ashirah, and As Sarat Mountains, Saudi Arabia","docAbstract":"<p>The geologic setting of the pyrite replacement deposit at Wadi Wassat was mapped in February 1966. From this mapping it is inferred that the pyrite deposits occur along a sub-vertical, north-trending fault in andesite and other rocks at the crest line of an anticline in a roof pendant. The pendant is in a composite pluton formed by a per-alkalic magma series. Diorite and biotite granite are the most common and older members of the series. Pyroxene granite and quartz porphyry are less common younger rocks in the series. Extrusive equivalents of these plutonic rocks form dikes in the area. The pyrite is interpreted to have been deposited from hydrothermal solutions after diorite and biotite granite were consolidated and while pyroxene granite was being emplaced. Structures controlling the deposition of the pyrite are regional. Exploration at 1:2,500 scale by geologic, geochemical, and electro-magnetic methods are recommended. Diamond drilling should accompany the other exploration.</p><p>Chemical analyses of 22 specimens of Precambrian marble from the Asir quadrangle shows that seven deposits have a composition within the range of compositions of natural cement rocks used for Roman cement and quick-setting cement. None of the samples is rich enough in CaO for use as a raw material for Portland cement, and most samples of the marble have too much MgO for Portland cement.</p><p>Analyses of the major elements in 71 samples of lateritic material from the As Sarat mountains show that none of the laterite can be used as an ore for iron owing to too little iron and too much alumina, silica, and sulfur. One sample has the alumina-silica ratio of gibbsite or boehmite. One sample has alumina and sulfur in percentages suggesting the presence of alunite, and several other samples probably contain alunite. Because alunite is potash rich and might be used as a raw material for potash fertilizer, it is recommended that an airborne radiometric survey be made of tine As Sarat mountains to locate potassium-rich parts of the laterite.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr68210","usgsCitation":"Overstreet, W.C., 1968, Summary of results from a trip February 6-March 5, 1966, to B'ir Idimah, Jabal Ashirah, and As Sarat Mountains, Saudi Arabia: U.S. Geological Survey Open-File Report 68-210, 47 p., https://doi.org/10.3133/ofr68210.","productDescription":"47 p.","costCenters":[],"links":[{"id":490922,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1968/0210/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":146473,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1968/0210/report-thumb.jpg"}],"country":"Saudi Arabia","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              42.51134058485468,\n              16.085331576365363\n            ],\n            [\n              47.40539649993957,\n              16.804751307428546\n            ],\n            [\n              55.48304415815818,\n              19.906682803877445\n            ],\n            [\n              56.02852252028691,\n              22.98388993754334\n            ],\n            [\n              48.713205446939156,\n              28.92282975080812\n            ],\n            [\n              39.01142628473238,\n              32.584850829080864\n            ],\n            [\n              36.59173224267667,\n              31.59568487926765\n            ],\n            [\n              34.727601660857374,\n              29.41077749994986\n            ],\n            [\n              34.63571534811834,\n              27.791069807938783\n            ],\n            [\n              42.51134058485468,\n              16.085331576365363\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b02e4b07f02db698a06","contributors":{"authors":[{"text":"Overstreet, William C.","contributorId":73586,"corporation":false,"usgs":true,"family":"Overstreet","given":"William","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":170913,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":14799,"text":"ofr68175 - 1968 - Uses of conventional aerial photography in urban areas - review and bibliography","interactions":[],"lastModifiedDate":"2025-06-24T17:22:23.563244","indexId":"ofr68175","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"68-175","title":"Uses of conventional aerial photography in urban areas - review and bibliography","docAbstract":"<p>This paper is divided into two parts. Part I presents a review of some of the past uses of aerial photography in urban areas. The empirical studies reviewed are divided into two broad categories depending on whether inventory compilation is by direct or indirect observation. Studies using inventory by direct observation are further divided into land-use studies and transportation studies. Part II identifies some problem areas for future research.</p>","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr68175","usgsCitation":"Manji, A.S., 1968, Uses of conventional aerial photography in urban areas - review and bibliography: U.S. Geological Survey Open-File Report 68-175, 29 p., https://doi.org/10.3133/ofr68175.","productDescription":"29 p.","costCenters":[],"links":[{"id":491215,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1968/0175/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":148035,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1968/0175/report-thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a16e4b07f02db603cf9","contributors":{"authors":[{"text":"Manji, Ashraf S.","contributorId":50913,"corporation":false,"usgs":true,"family":"Manji","given":"Ashraf","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":170034,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":62415,"text":"gq711 - 1968 - Bedrock geologic map of the Castle Reef quadrangle, Teton and Lewis and Clark Counties, Montana","interactions":[],"lastModifiedDate":"2012-02-10T00:10:42","indexId":"gq711","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":316,"text":"Geologic Quadrangle","code":"GQ","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"711","title":"Bedrock geologic map of the Castle Reef quadrangle, Teton and Lewis and Clark Counties, Montana","language":"ENGLISH","doi":"10.3133/gq711","usgsCitation":"Mudge, M.R., 1968, Bedrock geologic map of the Castle Reef quadrangle, Teton and Lewis and Clark Counties, Montana: U.S. Geological Survey Geologic Quadrangle 711, 1 map., https://doi.org/10.3133/gq711.","productDescription":"1 map.","costCenters":[],"links":[{"id":103433,"rank":700,"type":{"id":15,"text":"Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_2019.htm","linkFileType":{"id":5,"text":"html"},"description":"2019"},{"id":180152,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"scale":"24000","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -112.75,47.6175 ], [ -112.75,47.75 ], [ -112.61749999999999,47.75 ], [ -112.61749999999999,47.6175 ], [ -112.75,47.6175 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a62e4b07f02db6363b2","contributors":{"authors":[{"text":"Mudge, Melville Rhodes","contributorId":77119,"corporation":false,"usgs":true,"family":"Mudge","given":"Melville","email":"","middleInitial":"Rhodes","affiliations":[],"preferred":false,"id":267352,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":55851,"text":"ofr68161 - 1968 - Palynological investigations in the Pennsylvanian of Kentucky-IV","interactions":[{"subject":{"id":55851,"text":"ofr68161 - 1968 - Palynological investigations in the Pennsylvanian of Kentucky-IV","indexId":"ofr68161","publicationYear":"1968","noYear":false,"title":"Palynological investigations in the Pennsylvanian of Kentucky-IV"},"predicate":"SUPERSEDED_BY","object":{"id":6135,"text":"pp839 - 1973 - Palynological studies of the coals of the Princess Reserve District in northeastern Kentucky","indexId":"pp839","publicationYear":"1973","noYear":false,"title":"Palynological studies of the coals of the Princess Reserve District in northeastern Kentucky"},"id":1}],"supersededBy":{"id":6135,"text":"pp839 - 1973 - Palynological studies of the coals of the Princess Reserve District in northeastern Kentucky","indexId":"pp839","publicationYear":"1973","noYear":false,"title":"Palynological studies of the coals of the Princess Reserve District in northeastern Kentucky"},"lastModifiedDate":"2020-06-18T16:58:07.615245","indexId":"ofr68161","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"68-161","title":"Palynological investigations in the Pennsylvanian of Kentucky-IV","docAbstract":"<p>No abstract available.&nbsp;</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr68161","usgsCitation":"Kosanke, R.M., 1968, Palynological investigations in the Pennsylvanian of Kentucky-IV: U.S. Geological Survey Open-File Report 68-161, 39 p., https://doi.org/10.3133/ofr68161.","productDescription":"39 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,{"id":68439,"text":"ha315 - 1968 - Reconnaissance of the ground-water resources of the Missouri River alluvium between St. Charles and Jefferson City, Missouri","interactions":[],"lastModifiedDate":"2012-02-10T00:11:30","indexId":"ha315","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":318,"text":"Hydrologic Atlas","code":"HA","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"315","title":"Reconnaissance of the ground-water resources of the Missouri River alluvium between St. Charles and Jefferson City, Missouri","language":"ENGLISH","doi":"10.3133/ha315","usgsCitation":"Emmett, L.F., and Jeffery, H., 1968, Reconnaissance of the ground-water resources of the Missouri River alluvium between St. Charles and Jefferson City, Missouri: U.S. Geological Survey Hydrologic Atlas 315, 1 map., https://doi.org/10.3133/ha315.","productDescription":"1 map.","costCenters":[],"links":[{"id":185895,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":89969,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/ha/315/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}}],"scale":"25000","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -92.25,38.5 ], [ -92.25,39 ], [ -90.5,39 ], [ -90.5,38.5 ], [ -92.25,38.5 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a62e4b07f02db636c50","contributors":{"authors":[{"text":"Emmett, Leo F.","contributorId":67130,"corporation":false,"usgs":true,"family":"Emmett","given":"Leo","email":"","middleInitial":"F.","affiliations":[],"preferred":false,"id":278216,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Jeffery, H. G.","contributorId":74353,"corporation":false,"usgs":true,"family":"Jeffery","given":"H. G.","affiliations":[],"preferred":false,"id":278217,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":1785,"text":"wsp1876 - 1968 - Geology and ground-water resources of the lower Bighorn Valley, Montana","interactions":[],"lastModifiedDate":"2012-02-02T00:05:23","indexId":"wsp1876","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":341,"text":"Water Supply Paper","code":"WSP","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"1876","title":"Geology and ground-water resources of the lower Bighorn Valley, Montana","docAbstract":"The Bighorn River has incised a deep, broad valley in Cretaceous strata along its 65-mile lower reach below the mouth of Bighorn Canyon in south-central Montana. It ceased downcutting at six different levels 100-200 feet apart, widening its flood plain and alluviating each level with about 30 feet of sandy gravel. These deposits are the only economic source of ground water in large areas of the valley where the underlying bedrock consists of relatively impermeable shale to great depths. Ground water in the alluvium is hard and in the irrigated lowlands is highly mineralized at those places where drainage is slow and discharge by evapotranspiration is great. \r\n\r\nThree bedrock sandstone aquifers are present at moderate depths along three separate reaches of the valley. The sandstones yield soft, moderately to highly mineralized water that contains a high percent sodium. \r\n\r\nWells in alluvial gravel of the irrigated lowlands can yield 100 gallons per minute at many places because the alluvium is fairly permeable and is readily recharged by infiltration of applied irrigation water, canal seepage, and ground water moving into the lowlands from the alluvium of tributary coulees. Seepage from the Two Leggins Canal in the central area probably is large. \r\n\r\nAlluvial gravel deposits have been mantled by thick alluvial and colluvial deposits of silty clay or silt that thin riverward. These fine-grained deposits drain slowly and confine ground water in alluvial gravel under artesian pressure at many places in the irrigated lowlands of the central and southern areas. The piezometric surface is close to the land surface at many places in the central area, and capillary rise and evapotranspiration in waterlogged ground has produced agriculturally harmful alkali deposits. \r\n\r\nWaterlogging of presently irrigated land in the central area will become more widespread if irrigation is extended to higher terraces to the west unless drainage ditches are installed along the base of high-terrace alluvium to intercept increased seepage and spring discharge. Additional provisions also may be required to intercept water moving through the alluvium of coulees.","language":"ENGLISH","publisher":"Geological Survey; for sale by the Supt. of Docs.] U.S. Govt. Print. Off.,","doi":"10.3133/wsp1876","usgsCitation":"Hamilton, L.J., and Paulson, Q., 1968, Geology and ground-water resources of the lower Bighorn Valley, Montana: U.S. Geological Survey Water Supply Paper 1876, v, 39 p. :illus., maps (1 fold. col. in pocket) ;24 cm., https://doi.org/10.3133/wsp1876.","productDescription":"v, 39 p. :illus., maps (1 fold. col. in pocket) ;24 cm.","costCenters":[],"links":[{"id":138376,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wsp/1876/report-thumb.jpg"},{"id":26919,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/wsp/1876/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":26920,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wsp/1876/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4adae4b07f02db6854f5","contributors":{"authors":[{"text":"Hamilton, Louis J.","contributorId":53768,"corporation":false,"usgs":true,"family":"Hamilton","given":"Louis","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":144152,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Paulson, Q.F.","contributorId":107259,"corporation":false,"usgs":true,"family":"Paulson","given":"Q.F.","email":"","affiliations":[],"preferred":false,"id":144153,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":3848,"text":"cir591 - 1968 - Direct-current arc and alternating-current spark emission spectrographic field methods for the semiquantitative analysis of geologic materials","interactions":[],"lastModifiedDate":"2017-06-25T15:32:26","indexId":"cir591","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":307,"text":"Circular","code":"CIR","onlineIssn":"2330-5703","printIssn":"1067-084X","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"591","title":"Direct-current arc and alternating-current spark emission spectrographic field methods for the semiquantitative analysis of geologic materials","docAbstract":"Two spectrographic methods are used in mobile field laboratories of the U. S. Geological Survey. In the direct-current arc method, the ground sample is mixed with graphite powder, packed into an electrode crater, and burned to completion. Thirty elements are determined. In the spark method, the sample, ground to pass a 150-mesh screen, is digested in hydrofluoric acid followed by evaporation to dryness and dissolution in aqua regia. The solution is fed into the spark gap by means of a rotating-disk electrode arrangement and is excited with an alternating-current spark discharge. Fourteen elements are determined. In both techniques, light is recorded on Spectrum Analysis No. 1, 35-millimeter film, and the spectra are compared visually with those of standard films.","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/cir591","usgsCitation":"Grimes, D.J., and Marranzino, A., 1968, Direct-current arc and alternating-current spark emission spectrographic field methods for the semiquantitative analysis of geologic materials: U.S. Geological Survey Circular 591, iii, 6 p. :illus. ;26 cm., https://doi.org/10.3133/cir591.","productDescription":"iii, 6 p. :illus. ;26 cm.","costCenters":[],"links":[{"id":30922,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/circ/1968/0591/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":121291,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/circ/1968/0591/report-thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a82e4b07f02db64abea","contributors":{"authors":[{"text":"Grimes, D. J.","contributorId":73575,"corporation":false,"usgs":true,"family":"Grimes","given":"D.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":147717,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Marranzino, A. P.","contributorId":61798,"corporation":false,"usgs":true,"family":"Marranzino","given":"A. P.","affiliations":[],"preferred":false,"id":147716,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":61879,"text":"gq700 - 1968 - Geologic map of the Klingerstown quadrangle, Northumberland, Schuylkill, and Dauphin Counties, Pennsylvania","interactions":[],"lastModifiedDate":"2012-02-10T00:10:51","indexId":"gq700","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":316,"text":"Geologic Quadrangle","code":"GQ","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"700","title":"Geologic map of the Klingerstown quadrangle, Northumberland, Schuylkill, and Dauphin Counties, Pennsylvania","language":"ENGLISH","doi":"10.3133/gq700","usgsCitation":"Trexler, J.P., and Wood, G., 1968, Geologic map of the Klingerstown quadrangle, Northumberland, Schuylkill, and Dauphin Counties, Pennsylvania: U.S. Geological Survey Geologic Quadrangle 700, 1 map., https://doi.org/10.3133/gq700.","productDescription":"1 map.","costCenters":[],"links":[{"id":103422,"rank":700,"type":{"id":15,"text":"Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_2008.htm","linkFileType":{"id":5,"text":"html"},"description":"2008"},{"id":187349,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"scale":"24000","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -76.75,40.6175 ], [ -76.75,40.75 ], [ -76.61749999999999,40.75 ], [ -76.61749999999999,40.6175 ], [ -76.75,40.6175 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4afde4b07f02db69712e","contributors":{"authors":[{"text":"Trexler, J. Peter","contributorId":13695,"corporation":false,"usgs":true,"family":"Trexler","given":"J.","email":"","middleInitial":"Peter","affiliations":[],"preferred":false,"id":266499,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wood, Gordon H.","contributorId":28986,"corporation":false,"usgs":true,"family":"Wood","given":"Gordon H.","affiliations":[],"preferred":false,"id":266500,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
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