In 1976, the U.S. Geological Survey conducted the Atlantic Margin Coring Project (AMCOR) to obtain information on stratigraphy, hydrology and water chemistry, mineral resources other than petroleum hydrocarbons, and geotechnical engineering properties at sites widely distributed along the Continental Shelf and Slope of the Eastern United States (Hathaway and others, 1976, 1979). This program's primary purpose was to investigate a broad variety of sediment properties, many of which had not been previously studied in this region. Previous studies of sediments recovered by core drilling in this region were usually limited to one or two aspects of the sediment properties (Hathaway and others, 1979, table 2).
\nThe AMCOR program was limited by two factors: water depth and penetration depth. Because the ship selected for the program, the Glomar Conception, lacked dynamic positioning capability, its anchoring capacity determined the maximum water depth in which drilling could take place. Although it was equipped to anchor in water 450 m deep and did so successfully at one site, we attmepted no drilling in water depths greater than 300 m. Strong Gulf Stream currents at the one attempted deep (443 m) site frustrated attempts to \"spud in\" to begin the hole.
","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr81239","usgsCitation":"Poppe, L., 1981, Data file: the 1976 Atlantic Margin Coring (AMCOR) Project of the U.S. Geological Survey: U.S. Geological Survey Open-File Report 81-239, 96 p., https://doi.org/10.3133/ofr81239.","productDescription":"96 p.","numberOfPages":"97","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":140178,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1981/0239/report-thumb.jpg"},{"id":34403,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1981/0239/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"country":"United States","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -82.02,24.97 ], [ -82.02,43.0 ], [ -65.13,43.0 ], [ -65.13,24.97 ], [ -82.02,24.97 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ac9e4b07f02db67c958","contributors":{"editors":[{"text":"Poppe, Lawrence J. lpoppe@usgs.gov","contributorId":2149,"corporation":false,"usgs":true,"family":"Poppe","given":"Lawrence J.","email":"lpoppe@usgs.gov","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":503962,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Poppe, Lawrence J. lpoppe@usgs.gov","contributorId":2149,"corporation":false,"usgs":true,"family":"Poppe","given":"Lawrence J.","email":"lpoppe@usgs.gov","affiliations":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":154195,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":7082,"text":"ofr8190 - 1981 - Deepwell monitoring of strain-sensitive parameters over the Greater Southern California uplift","interactions":[],"lastModifiedDate":"2012-02-02T00:05:59","indexId":"ofr8190","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1981","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":"81-90","title":"Deepwell monitoring of strain-sensitive parameters over the Greater Southern California uplift","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr8190","usgsCitation":"Henyey, T.L., Teng, T., Hammond, D.E., Sammis, C., McRaney, J., Malin, P., Sun, L., Manov, D., Miller, L., and Scott, N., 1981, Deepwell monitoring of strain-sensitive parameters over the Greater Southern California uplift: U.S. Geological Survey Open-File Report 81-90, 64 p.:ill., maps ;28 cm., https://doi.org/10.3133/ofr8190.","productDescription":"64 p.:ill., maps ;28 cm.","costCenters":[],"links":[{"id":140186,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1981/0090/report-thumb.jpg"},{"id":34410,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1981/0090/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4abbe4b07f02db672558","contributors":{"authors":[{"text":"Henyey, Thomas L.","contributorId":34493,"corporation":false,"usgs":true,"family":"Henyey","given":"Thomas","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":154221,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Teng, Ta-liang","contributorId":18356,"corporation":false,"usgs":true,"family":"Teng","given":"Ta-liang","affiliations":[],"preferred":false,"id":154217,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hammond, Douglas E.","contributorId":67878,"corporation":false,"usgs":true,"family":"Hammond","given":"Douglas","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":154222,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Sammis, C.G.","contributorId":77140,"corporation":false,"usgs":true,"family":"Sammis","given":"C.G.","affiliations":[],"preferred":false,"id":154224,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"McRaney, J.K.","contributorId":29411,"corporation":false,"usgs":true,"family":"McRaney","given":"J.K.","affiliations":[],"preferred":false,"id":154219,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Malin, P.E.","contributorId":108104,"corporation":false,"usgs":true,"family":"Malin","given":"P.E.","email":"","affiliations":[],"preferred":false,"id":154226,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Sun, Liang-Fang","contributorId":19544,"corporation":false,"usgs":true,"family":"Sun","given":"Liang-Fang","email":"","affiliations":[],"preferred":false,"id":154218,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Manov, D.V.","contributorId":84360,"corporation":false,"usgs":true,"family":"Manov","given":"D.V.","email":"","affiliations":[],"preferred":false,"id":154225,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Miller, L.G.","contributorId":32522,"corporation":false,"usgs":true,"family":"Miller","given":"L.G.","email":"","affiliations":[],"preferred":false,"id":154220,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Scott, N.L.","contributorId":70380,"corporation":false,"usgs":true,"family":"Scott","given":"N.L.","email":"","affiliations":[],"preferred":false,"id":154223,"contributorType":{"id":1,"text":"Authors"},"rank":10}]}} ,{"id":7089,"text":"ofr811339 - 1981 - Description and correlation of core from five deep drill holes in Carboniferous rocks along the New River gorge, West Virginia","interactions":[],"lastModifiedDate":"2012-02-02T00:06:07","indexId":"ofr811339","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1981","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":"81-1339","title":"Description and correlation of core from five deep drill holes in Carboniferous rocks along the New River gorge, West Virginia","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr811339","usgsCitation":"Henry, T.W., Englund, K.J., Johnson, P.L., Mory, P., and Windolph, J., 1981, Description and correlation of core from five deep drill holes in Carboniferous rocks along the New River gorge, West Virginia: U.S. Geological Survey Open-File Report 81-1339, i, 89 p., ill., maps ;28 cm., https://doi.org/10.3133/ofr811339.","productDescription":"i, 89 p., ill., maps ;28 cm.","costCenters":[],"links":[{"id":141346,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1981/1339/report-thumb.jpg"},{"id":34416,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1981/1339/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ab2e4b07f02db66eb61","contributors":{"authors":[{"text":"Henry, T. W.","contributorId":81904,"corporation":false,"usgs":true,"family":"Henry","given":"T.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":154250,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Englund, K. J.","contributorId":96684,"corporation":false,"usgs":true,"family":"Englund","given":"K.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":154252,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Johnson, P. L.","contributorId":44917,"corporation":false,"usgs":true,"family":"Johnson","given":"P.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":154248,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Mory, P. C.","contributorId":47780,"corporation":false,"usgs":true,"family":"Mory","given":"P. C.","affiliations":[],"preferred":false,"id":154249,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Windolph, J. F. Jr.","contributorId":96256,"corporation":false,"usgs":true,"family":"Windolph","given":"J. F.","suffix":"Jr.","affiliations":[],"preferred":false,"id":154251,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}} ,{"id":7090,"text":"ofr811323 - 1981 - Description and preliminary interpretation of core CL-80-2, Clear Lake, Lake County, California","interactions":[],"lastModifiedDate":"2022-04-26T23:00:02.526645","indexId":"ofr811323","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1981","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":"81-1323","title":"Description and preliminary interpretation of core CL-80-2, Clear Lake, Lake County, California","docAbstract":"Coring operations in the west basin of Clear Lake produced a regional Quaternary reference section to augment and extend a previous study of cores from Clear Lake. This report concerns 165.8—m—long core CL-80-2, which was continuously cored in 8.0 m of water and has a 65.0 percent recovery. The sedinents in core CL-80-2 are composed primarily of clayey and silty sapropelic mud that is similar to those presently being deposited in the lake. The core ended in coarse CO2—charged sand at 165.8 m. The age of sediment at the bottom of the core is inferred to be approximately 175,000 years.
Shelikof Strait, situated between the Kodiak Island group and the Alaska Peninsula (Fig. 1), is included in OCS oil and gas lease area 60. Environmental geologic studies are being conducted by the U.S. Geological Survey prior to the scheduled September 1981 sale date. Seismic-reflection records, collected with 40- to 95-cm3 airgun, 800-joule minisparker, 800-joule boomer, and 3.5-and 12-kilohertz systems and covering over 6,400 km of trackline have been examined to identify geologic conditions at or below the seafloor that might affect petroleum operations. Of the total trackline distance, 865 km were collected in June 1980 aboard the Geological Survey's ship R/V S.P. LEE. The remainder were collected by Nekton Inc. in 1979, under contract to the USGS (Fig. 2). Sediment samples were collected at 42 stations on the June 1980 cruise for geological and geotechnical analysis (Fig. 2).
The purpose of this report is to present physical and chemical measurements that have been made on sediment samples and to give a preliminary geo-environmental assessment of Shelikof Strait, based on presently completed analyses of the geophysical records and sediment samples.
","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr811133","usgsCitation":"Hampton, M.A., Johnson, K., Torresan, M., and Winters, W., 1981, Description of seafloor sediment and preliminary geo-environmental report, Shelikof Strait, Alaska: U.S. Geological Survey Open-File Report 81-1133, 87 p., https://doi.org/10.3133/ofr811133.","productDescription":"87 p.","costCenters":[],"links":[{"id":422756,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1981/1133/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":140412,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1981/1133/report-thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Shelikof Strait","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -156,\n 60\n ],\n [\n -156,\n 57\n ],\n [\n -152,\n 57\n ],\n [\n -152,\n 60\n ],\n [\n -156,\n 60\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ab0e4b07f02db66da02","contributors":{"authors":[{"text":"Hampton, Monty A. mhampton@usgs.gov","contributorId":4393,"corporation":false,"usgs":true,"family":"Hampton","given":"Monty","email":"mhampton@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":true,"id":154283,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Johnson, K.H.","contributorId":27450,"corporation":false,"usgs":true,"family":"Johnson","given":"K.H.","email":"","affiliations":[],"preferred":false,"id":154285,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Torresan, M.E.","contributorId":22775,"corporation":false,"usgs":true,"family":"Torresan","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":154284,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Winters, W.J.","contributorId":49796,"corporation":false,"usgs":true,"family":"Winters","given":"W.J.","email":"","affiliations":[],"preferred":false,"id":154286,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}} ,{"id":7109,"text":"ofr8141 - 1981 - Earthquake hazards reduction program, 1979-80","interactions":[],"lastModifiedDate":"2018-10-22T17:43:50","indexId":"ofr8141","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1981","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":"81-41","title":"Earthquake hazards reduction program, 1979-80","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr8141","usgsCitation":"1981, Earthquake hazards reduction program, 1979-80: U.S. Geological Survey Open-File Report 81-41, 124 p. :ill, maps ;28 cm.; (133 p. - PGS), https://doi.org/10.3133/ofr8141.","productDescription":"124 p. :ill, maps ;28 cm.; (133 p. - PGS)","costCenters":[],"links":[{"id":34427,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1981/0041/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":142077,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1981/0041/report-thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a51e4b07f02db6297d9","contributors":{"editors":[{"text":"MacCabe, Marilyn P.","contributorId":59443,"corporation":false,"usgs":true,"family":"MacCabe","given":"Marilyn","email":"","middleInitial":"P.","affiliations":[],"preferred":false,"id":749242,"contributorType":{"id":2,"text":"Editors"},"rank":1}]}} ,{"id":7124,"text":"ofr81437 - 1981 - Proceedings of Conference XIII, evaluation of regional seismic hazards and risk","interactions":[],"lastModifiedDate":"2013-11-15T09:08:23","indexId":"ofr81437","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1981","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":"81-437","title":"Proceedings of Conference XIII, evaluation of regional seismic hazards and risk","docAbstract":"The participants in the conference concluded that a great deal of useful research has been performed in the national Earthquake Hazards Reduction \nProgram by USGS and non-USGS scientists and engineers and that the state-of-knowledge concerning the evaluation of seismic hazards and risk has been advanced substantially. Many of the technical issues raised during the conference are less controversial now because of new information and insights gained during the first three years of the expanded research program conducted under the Earthquake Hazards Reduction Act. Utilization of research results by many groups of users has also improved during this period and further improvement in utilization appears likely.
\nAdditional research is still required to resolve more completely the many complex technical issues summarized above and described in the papers contained in the proceedings. Improved certainty of research results on the evaluation of regional seismic hazards and risk is required before full utilization can be made by state and local governments who deal. with people frequently having a different perception of the hazard and its risk to them than that perceived by scientists or engineers.
\nEach of the papers contained in the proceedings contain throughtful recommendations for improving the state-of-knowledge. Two papers, in particular, focussed on this particular theme. The first was presented by Lynn Sykes in the Geologic Keynote Address. He identified geographic areas throughout the world which may be considered as counterparts or analogues of seismic zones in the United States. He concluded that much can be learned about prediction, tectonic settings, earthquake hazards, and earthquake risk for sites in the United States by studying their tectonic analogues in other countries. The second paper was presented by John Blume in the Engineering Keynote Address. He suggested 20 specific research topics that, in his opinion, will significantly advance the state-of-the-art in earthquakeresistant design. The papers by Sykes and Blume are presented in the front of the proceedings.
","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Menlo Park, CA","doi":"10.3133/ofr81437","usgsCitation":"Charonnat, B.B., 1981, Proceedings of Conference XIII, evaluation of regional seismic hazards and risk: U.S. Geological Survey Open-File Report 81-437, i, 248 p., https://doi.org/10.3133/ofr81437.","productDescription":"i, 248 p.","numberOfPages":"252","costCenters":[{"id":490,"text":"Office of Earthquake Studies","active":false,"usgs":true}],"links":[{"id":142276,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1981/0437/report-thumb.jpg"},{"id":277913,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1981/0437/report.pdf"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a9ee4b07f02db66085e","contributors":{"authors":[{"text":"Charonnat, Barbara B. (compiler)","contributorId":9252,"corporation":false,"usgs":true,"family":"Charonnat","given":"Barbara","suffix":"(compiler)","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":154377,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":7138,"text":"ofr81937 - 1981 - A field study of earthquake prediction methods in the central Aleutian Islands; Part II","interactions":[],"lastModifiedDate":"2012-02-02T00:06:08","indexId":"ofr81937","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1981","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":"81-937","title":"A field study of earthquake prediction methods in the central Aleutian Islands; Part II","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr81937","usgsCitation":"Kisslinger, C., Billington, S., Bowman, R., Ihnen, S., Cruz, G., Pohlman, J., Sougstad, K., and Morrissey, S., 1981, A field study of earthquake prediction methods in the central Aleutian Islands; Part II: U.S. Geological Survey Open-File Report 81-937, 59 p. ill., maps ;28 cm., https://doi.org/10.3133/ofr81937.","productDescription":"59 p. ill., maps ;28 cm.","costCenters":[],"links":[{"id":141540,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1981/0937/report-thumb.jpg"},{"id":34444,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1981/0937/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b24e4b07f02db6aeba8","contributors":{"authors":[{"text":"Kisslinger, Carl","contributorId":79884,"corporation":false,"usgs":true,"family":"Kisslinger","given":"Carl","email":"","affiliations":[],"preferred":false,"id":154439,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Billington, S.","contributorId":75925,"corporation":false,"usgs":true,"family":"Billington","given":"S.","email":"","affiliations":[],"preferred":false,"id":154438,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bowman, R.","contributorId":12012,"corporation":false,"usgs":true,"family":"Bowman","given":"R.","email":"","affiliations":[],"preferred":false,"id":154434,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ihnen, S.","contributorId":100390,"corporation":false,"usgs":true,"family":"Ihnen","given":"S.","email":"","affiliations":[],"preferred":false,"id":154441,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Cruz, G.","contributorId":64605,"corporation":false,"usgs":true,"family":"Cruz","given":"G.","email":"","affiliations":[],"preferred":false,"id":154437,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Pohlman, J.","contributorId":19949,"corporation":false,"usgs":true,"family":"Pohlman","given":"J.","email":"","affiliations":[],"preferred":false,"id":154435,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Sougstad, K.","contributorId":90307,"corporation":false,"usgs":true,"family":"Sougstad","given":"K.","email":"","affiliations":[],"preferred":false,"id":154440,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Morrissey, S.T.","contributorId":61036,"corporation":false,"usgs":true,"family":"Morrissey","given":"S.T.","email":"","affiliations":[],"preferred":false,"id":154436,"contributorType":{"id":1,"text":"Authors"},"rank":8}]}} ,{"id":7150,"text":"ofr81435 - 1981 - Geochemical analyses of samples of stream sediments, panned heavy-mineral concentrates, rocks, and waters of the Pusch Ridge Wilderness Area, Arizona","interactions":[],"lastModifiedDate":"2012-02-02T00:06:04","indexId":"ofr81435","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1981","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":"81-435","title":"Geochemical analyses of samples of stream sediments, panned heavy-mineral concentrates, rocks, and waters of the Pusch Ridge Wilderness Area, Arizona","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr81435","usgsCitation":"Hinkle, M., Kilburn, J., Eppinger, R., and Speckman, W.S., 1981, Geochemical analyses of samples of stream sediments, panned heavy-mineral concentrates, rocks, and waters of the Pusch Ridge Wilderness Area, Arizona: U.S. Geological Survey Open-File Report 81-435, 46 p. ;28 cm., https://doi.org/10.3133/ofr81435.","productDescription":"46 p. ;28 cm.","costCenters":[],"links":[{"id":140484,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1981/0435/report-thumb.jpg"},{"id":34461,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1981/0435/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":34462,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1981/0435/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b24e4b07f02db6ae882","contributors":{"authors":[{"text":"Hinkle, Margaret","contributorId":36918,"corporation":false,"usgs":true,"family":"Hinkle","given":"Margaret","affiliations":[],"preferred":false,"id":154500,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Kilburn, J.E.","contributorId":42205,"corporation":false,"usgs":true,"family":"Kilburn","given":"J.E.","email":"","affiliations":[],"preferred":false,"id":154501,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Eppinger, R. 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1981 - Geology and chemical analyses of coal and coal-associated rock samples, Williams Fork Formation (Upper Cretaceous), northwestern Colorado","interactions":[],"lastModifiedDate":"2012-02-02T00:05:59","indexId":"ofr811348","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1981","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":"81-1348","title":"Geology and chemical analyses of coal and coal-associated rock samples, Williams Fork Formation (Upper Cretaceous), northwestern Colorado","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr811348","usgsCitation":"Hildebrand, R., Garrigues, R., Meyer, R.F., and Reheis, M., 1981, Geology and chemical analyses of coal and coal-associated rock samples, Williams Fork Formation (Upper Cretaceous), northwestern Colorado: U.S. Geological Survey Open-File Report 81-1348, vii, 103 p., ill., maps ;28 cm., https://doi.org/10.3133/ofr811348.","productDescription":"vii, 103 p., ill., maps ;28 cm.","costCenters":[],"links":[{"id":140138,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1981/1348/report-thumb.jpg"},{"id":34561,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1981/1348/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4adce4b07f02db6863d9","contributors":{"authors":[{"text":"Hildebrand, R.T.","contributorId":71967,"corporation":false,"usgs":true,"family":"Hildebrand","given":"R.T.","email":"","affiliations":[],"preferred":false,"id":154675,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Garrigues, R.S.","contributorId":15606,"corporation":false,"usgs":true,"family":"Garrigues","given":"R.S.","email":"","affiliations":[],"preferred":false,"id":154672,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Meyer, R. 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This 40-km x 35-km area was chosen for study because it lies within the area of high interest for petroleum development (Lease sales 49 and 59), and because it includes several wells which provide stratigraphic control. This report discusses the results of geologic mapping, using seismic-reflection data acquired in 1978 and 1979. Some initial results from more recently acquired data are included.
The Continental Slope in the study area has a complex surface with ridges, canyons, and valleys. Three slump or slide features were observed in the heads and on the walls of canyons and valleys, and two slides were identified on an intercanyon area. The identified slumps or slides are found in Quaternary sediments and total about 1.3 percent of the Continental Slope area mapped.
The slope is generally mantled by less than 2 m of Holocene sediments. Pleistocene sediment (primarily silty clay) is about 450 m thick at the top of the slope and thins to nearly zero or is absent on much of the mid and lower slope, where sediments of Miocene to Eocene age are exposed. Ridges on the midslope (water depths of 800-1,500 m) and parts of the lowr slope (1,500-2,150 m) result primarily from Pleistocene and older deposition. The intervening valleys show evidence of erosion along the deepest parts of their courses. Mid-range sidescan-sonar data show evidence that processes of bottom-current erosion and downcanyon transport of material may be active in the present day. However, major features of the sea floor appear to be unchanged since late-Pleistocene time.
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","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr811078","usgsCitation":"Sable, E.G., Dutro, J.T., Mangus, M.D., and Morris, R.H., 1981, Geology of the Kukpowruk-Nuka Rivers region, northwestern Alaska: U.S. Geological Survey Open-File Report 81-1078, Report: viii, 125 p.; 1 Plate: 30.81 x 16.49 inches, https://doi.org/10.3133/ofr811078.","productDescription":"Report: viii, 125 p.; 1 Plate: 30.81 x 16.49 inches","costCenters":[],"links":[{"id":108095,"rank":4,"type":{"id":36,"text":"NGMDB Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_11882.htm","linkFileType":{"id":5,"text":"html"},"description":"11882"},{"id":34581,"rank":3,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1981/1078/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":34582,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1981/1078/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":140158,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1981/1078/report-thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Kukpowruk-Nuka Rivers region","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -163.5,\n 69\n ],\n [\n -163.5,\n 68.333\n ],\n [\n -159.156,\n 68.333\n ],\n [\n -159.156,\n 69\n ],\n [\n -163.5,\n 69\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4acee4b07f02db67f673","contributors":{"authors":[{"text":"Sable, Edward G.","contributorId":51273,"corporation":false,"usgs":true,"family":"Sable","given":"Edward","email":"","middleInitial":"G.","affiliations":[],"preferred":false,"id":154704,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dutro, J. T.","contributorId":79097,"corporation":false,"usgs":true,"family":"Dutro","given":"J.","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":154705,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Mangus, M. D.","contributorId":89522,"corporation":false,"usgs":true,"family":"Mangus","given":"M.","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":154706,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Morris, R. 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1981 - Geophysical and lithologic logs of 1980-81 coal drilling in the Warrior coal field, Tuscaloosa, Fayette, and Walker counties, Alabama","interactions":[],"lastModifiedDate":"2012-02-02T00:06:00","indexId":"ofr81618","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1981","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":"81-618","title":"Geophysical and lithologic logs of 1980-81 coal drilling in the Warrior coal field, Tuscaloosa, Fayette, and Walker counties, Alabama","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr81618","usgsCitation":"Hall, R.W., Law, R., Markewich, W., Horsey, C., Ward, W., and Barnett, R., 1981, Geophysical and lithologic logs of 1980-81 coal drilling in the Warrior coal field, Tuscaloosa, Fayette, and Walker counties, Alabama: U.S. Geological Survey Open-File Report 81-618, ii, 157 p. chiefly ill., maps ;28 cm., https://doi.org/10.3133/ofr81618.","productDescription":"ii, 157 p. chiefly ill., maps ;28 cm.","costCenters":[],"links":[{"id":140170,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1981/0618/report-thumb.jpg"},{"id":34589,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1981/0618/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":34590,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1981/0618/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ac8e4b07f02db67c20c","contributors":{"authors":[{"text":"Hall, Robert W.","contributorId":43751,"corporation":false,"usgs":true,"family":"Hall","given":"Robert","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":154719,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Law, Ronald","contributorId":102472,"corporation":false,"usgs":true,"family":"Law","given":"Ronald","email":"","affiliations":[],"preferred":false,"id":154724,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Markewich, William","contributorId":45306,"corporation":false,"usgs":true,"family":"Markewich","given":"William","email":"","affiliations":[],"preferred":false,"id":154720,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Horsey, C.A.","contributorId":92244,"corporation":false,"usgs":true,"family":"Horsey","given":"C.A.","affiliations":[],"preferred":false,"id":154723,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Ward, W.E.","contributorId":85176,"corporation":false,"usgs":true,"family":"Ward","given":"W.E.","email":"","affiliations":[],"preferred":false,"id":154722,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Barnett, R.L.","contributorId":63006,"corporation":false,"usgs":true,"family":"Barnett","given":"R.L.","email":"","affiliations":[],"preferred":false,"id":154721,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}} ,{"id":7207,"text":"ofr82414 - 1981 - Gold placer and Quaternary stratigraphy of the Jabal Mokhyat area, southern Najd Province, Kingdom of Saudi Arabia","interactions":[],"lastModifiedDate":"2012-02-02T00:06:00","indexId":"ofr82414","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1981","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":"82-414","title":"Gold placer and Quaternary stratigraphy of the Jabal Mokhyat area, southern Najd Province, Kingdom of Saudi Arabia","docAbstract":"An ancient gold placer at Jabal Mokhyat (lat 20?12.2'N., long 43?28'E.), about 90 km east of Qalat Bishah in the southern Najd Province, Kingdom of Saudi Arabia, was studied in 1973. Seven hundred and twenty-eight samples in 25 measured sections were collected along trenches and pits 2.5 m in depth and 2,600 m in total length. Alluvium was thicker than the excavation depth along about 50 percent of the trench length. The average gold content was 4.4 mg per m3, and the highest grade trench contained 40 mg gold per m 3. Because fine particulate gold is rare in the alluvium, a few large particles, 1 to 5 mm in diameter, greatly affected the sampling results. The ancient placer diggings are in small headwater wadis distributed over a 30-km 2 area, and the total dug area is about 1.2 km2. The placer produced an estimated 50 kg of gold and was worked about 2,600 + 250 years ago. The potential for a present-day placer operation is small. \r\n\r\nThe gold is sparsely distributed in locally derived, flood-deposited, immature gravels throughout a stratigraphic section that consists of 1) calichified, saprolitic bedrock of Precambrian age; 2) basal, intensely calichified, saprolitic gravel (0-3 m thick) of Pleistocene age; 3) disconformable, slightly consolidated gravel and sand (0-1 m thick) of late Pleistocene age containing sparse, disseminated caliche; 4) firm loessic silt (0-1 m thick) of early Holocene age; and 5) loose sand and gravel (0.3-1 m thick) of late Holocene age. The loessic silt accumulated during the Holocene pluvial. The top of the loessic silt unit is dated at about 6,000 years B.P. by using charcoal from hearths of ancient man. Following the Holocene pluvial, the climate became arid, and extreme desiccation resulted in abundant eolian sand that progressively diluted the late Holocene gravels. The remnants of the pre-Holocene stratigraphy suggest similar climatic cycles during the Pleistocene.\r\n\r\nAbundant, sparsely mineralized, gold-bearing quartz veins (0-1 m wide) were the source of the placer gold. These late Proterozoic veins have hydrothermally altered wall-rock zones (1-5 m wide). The veins are dispersed over an area of 50 km 2. Though many veins were prospected in ancient times and some were slightly worked, only the Mokhyat ancient mine, located on a quartz-vein zone 30 m wide by 200 m long, was extensively worked. The quartz contains chalcopyrite, galena, sphalerite, tetrahedrite, an unidentified bismuth mineral, and small amounts of dispersed gold. \r\n\r\nThe fissure quartz veins lie at the complexly splayed, terminal end of a small northwest-trending Najd fault that elsewhere along strike has ii km of left-lateral displacement. Most large veins are in north-trending vertical fractures where the stresses were distributed along an older, north-trending structural grain in andesitic greenstone terrane. Subhorizontal fracture sets contain conspicuous, well-developed gold-bearing quartz veins and associated alteration zones. These attest to the shallowness and youthfulness of mineralization during latest Precambrian time.\r\n\r\nLate Precambrian granitic plutons (625-600 m.y. old) had been deeply eroded before the gold minerals were emplaced; hence, the gold is not related to granitic plutonism. Abundant, widely distributed diabasic dikes associated with the Najd faulting event of latest Precambrian age were probably the heat source for the hydrothermal convection system and possibly the source of the gold.","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr82414","usgsCitation":"Schmidt, D.L., Puffett, W., Campbell, W.L., and Al-Koulak, Z., 1981, Gold placer and Quaternary stratigraphy of the Jabal Mokhyat area, southern Najd Province, Kingdom of Saudi Arabia: U.S. Geological Survey Open-File Report 82-414, 76 p. :ill., maps ;28 cm., https://doi.org/10.3133/ofr82414.","productDescription":"76 p. :ill., maps ;28 cm.","costCenters":[],"links":[{"id":140817,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1982/0414/report-thumb.jpg"},{"id":34606,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1982/0414/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":34607,"rank":401,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1982/0414/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":34608,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1982/0414/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4abde4b07f02db674032","contributors":{"authors":[{"text":"Schmidt, D. 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K.","contributorId":50149,"corporation":false,"usgs":true,"family":"Cooper","given":"A.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":154811,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Karl, H.","contributorId":40213,"corporation":false,"usgs":true,"family":"Karl","given":"H.","affiliations":[],"preferred":false,"id":154810,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"McLean, H.","contributorId":11212,"corporation":false,"usgs":true,"family":"McLean","given":"H.","email":"","affiliations":[],"preferred":false,"id":154809,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"McMullin, R. H.","contributorId":68717,"corporation":false,"usgs":true,"family":"McMullin","given":"R.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":154812,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Lynch, M.B.","contributorId":105299,"corporation":false,"usgs":true,"family":"Lynch","given":"M.B.","email":"","affiliations":[],"preferred":false,"id":154815,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}} ,{"id":7234,"text":"ofr81137 - 1981 - Hydrology of area 14, Eastern Coal Province, Kentucky","interactions":[],"lastModifiedDate":"2012-02-02T00:05:50","indexId":"ofr81137","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1981","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":"81-137","title":"Hydrology of area 14, Eastern Coal Province, Kentucky","docAbstract":"The general hydrology of Area 14, Eastern Coal Province, in Kentucky, is described. The area includes 4,423 square miles in the Kentucky, Licking, and Red River basins. Coal-bearing rocks of Pennsylvanian age underlie most of the area. Coal production in 1978 was about 38 million tons, 65% of which was from surface mining. The drainage from the mined areas contains large amounts of dissolved solids. Sulfate, manganese, and iron concentrations in most of the area streams exceed background levels, with the higher concentrations in streams draining the headwaters of the North and Middle Forks of the Kentucky River. The pH of most of the streams is near neutral acid-mine drainage being partially neutralized close to its source. Ground waters in the upper 300 feet of the aquifers are generally suitable for most purposes, although dissolved iron is generally high. Below 300 feet, the water is saline. Yields to wells range from 1 to 325 gallons per minute. A network of 66 surface quantity and quality of water stations was implemented in 1979 in response to the Surface Mining and Reclamation Act of 1977. An intensive study of the ground water resources of the area is also in progress. (USGS)","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr81137","usgsCitation":"Quinones, F., 1981, Hydrology of area 14, Eastern Coal Province, Kentucky: U.S. Geological Survey Open-File Report 81-137, v, 112 p. :ill. (some col.), maps (some col.) ;28 cm., https://doi.org/10.3133/ofr81137.","productDescription":"v, 112 p. :ill. (some col.), maps (some col.) ;28 cm.","costCenters":[],"links":[{"id":94752,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1981/0137/report.pdf","size":"25342","linkFileType":{"id":1,"text":"pdf"}},{"id":139830,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1981/0137/report-thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a14e4b07f02db602439","contributors":{"authors":[{"text":"Quinones, F.","contributorId":93037,"corporation":false,"usgs":true,"family":"Quinones","given":"F.","email":"","affiliations":[],"preferred":false,"id":154857,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":7236,"text":"ofr81492 - 1981 - Hydrology of area 18, Eastern Coal Province, Tennessee","interactions":[],"lastModifiedDate":"2012-02-02T00:05:50","indexId":"ofr81492","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1981","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":"81-492","title":"Hydrology of area 18, Eastern Coal Province, Tennessee","docAbstract":"The Eastern Coal Province is divided into 24 hydrologic reporting areas. This report describes the hydrology of area 18 which is located in the Cumberland River basin in central Tennessee near the southern end of the Province. Hydrologic information and sources are presented as text, tables, maps, and other illustrations designed to be useful to mine owners, operators, and consulting engineers in implementing permit applications that comply with the environmental requirements of the ' Surface Mining Control and Reclamation Act of 1977. ' Area 18 encompasses parts of three physiographic regions; from east to west the Cumberland Plateau, Highland Rim, and Central Basin. The Plateau is underlain by sandstones and shales, with thin interbedded coal beds, of Pennsylvanian age. The Highland Rim and Central Basin are underlain by limestone and dolomite of Mississippian age. Field and laboratory analyses of chemical and physical water-quality parameters of streamflow samples show no widespread water quality problems. Some streams, however, in the heavily mined areas have concentrations of sulfate, iron, manganese, and sediment above natural levels, and pH values below natural levels. Mine seepage and direct mine drainage were not sampled. Ground water occurs in and moves through fractures in the sandstones and shales and solution openings in the limestones and dolomites. Depth to water is variable, ranging from about 5 to 70 feet below land-surface in the limestones and dolomites, and 15 to 40 feet in the coal-bearing rocks. The quality of ground water is generally good. Locally, in coal-bearing rocks, acidic water and high concentrations of manganese, chloride, and iron have been detected. (USGS)","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr81492","usgsCitation":"May, V., 1981, Hydrology of area 18, Eastern Coal Province, Tennessee: U.S. Geological Survey Open-File Report 81-492, 78 p. :ill. (some col.), maps (some col.) ;29 cm., https://doi.org/10.3133/ofr81492.","productDescription":"78 p. :ill. (some col.), maps (some col.) ;29 cm.","costCenters":[],"links":[{"id":94754,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1981/0492/report.pdf","size":"25049","linkFileType":{"id":1,"text":"pdf"}},{"id":139836,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1981/0492/report-thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a17e4b07f02db6045e5","contributors":{"authors":[{"text":"May, V.J.","contributorId":71539,"corporation":false,"usgs":true,"family":"May","given":"V.J.","email":"","affiliations":[],"preferred":false,"id":154862,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ]}