The proposed relocation of the Concord-Westminster Highway, Route 2, in Lancaster, Mass., requires a long, deep cut between stations 138 and 155. A preliminary seismic survey was made of the site in October 1949. At that time five transverses were made along the base-line, and three transverse to it. This work showed an anomalous situation in the vicinity of shot point E. In order to obtain the required additional data to resolve these anomalies, four more seismic transverses were made in November 1949. Two of these were run along the base-line between station 138+52 and station 145+12 in such a way as to yield, in conjugation with the preliminary survey, depth data of a 660-foot transverse. One of the primary functions of this long line was to obtain a reliable bedrock velocity. The other two transverses were transverse to the long transverse. This report comprises all of the seismic and geologic work performed at this site.
\nThe work was done as a part of a cooperative program of the Massachusetts Department of Public Works and the United States Geological Survey.
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\"}}]}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a95e4b07f02db659d1b","contributors":{"authors":[{"text":"Combo, John Xavier","contributorId":30968,"corporation":false,"usgs":true,"family":"Combo","given":"John","email":"","middleInitial":"Xavier","affiliations":[],"preferred":false,"id":279879,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Holmes, Clifford N.","contributorId":35012,"corporation":false,"usgs":true,"family":"Holmes","given":"Clifford N.","affiliations":[],"preferred":false,"id":279880,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Christner, H. Reed","contributorId":51386,"corporation":false,"usgs":true,"family":"Christner","given":"H.","email":"","middleInitial":"Reed","affiliations":[],"preferred":false,"id":279881,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}} ,{"id":71968,"text":"tei48 - 1950 - Trace elements reconnaissance of the southern highway belt, south-central Alska","interactions":[],"lastModifiedDate":"2012-02-02T00:14:02","indexId":"tei48","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1950","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":337,"text":"Trace Elements Investigations","code":"TEI","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"48","title":"Trace elements reconnaissance of the southern highway belt, south-central Alska","language":"ENGLISH","doi":"10.3133/tei48","usgsCitation":"Moxham, R., 1950, Trace elements reconnaissance of the southern highway belt, south-central Alska: U.S. Geological Survey Trace Elements Investigations 48, 17 p., 2 fig., https://doi.org/10.3133/tei48.","productDescription":"17 p., 2 fig.","costCenters":[],"links":[{"id":193271,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/tei/048/report-thumb.jpg"},{"id":91058,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/tei/048/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":91059,"rank":401,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/tei/048/plate-2.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":91060,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/tei/048/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a4ee4b07f02db627bda","contributors":{"authors":[{"text":"Moxham, R.M.","contributorId":42234,"corporation":false,"usgs":true,"family":"Moxham","given":"R.M.","email":"","affiliations":[],"preferred":false,"id":284931,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":69200,"text":"coal5 - 1950 - The Fire Clay and Whitesburg coals in the Hyden quadrangle, Leslie, Clay, and Perry Counties, Kentucky","interactions":[],"lastModifiedDate":"2018-11-30T14:30:31","indexId":"coal5","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1950","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":309,"text":"Coal Map","code":"COAL","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"5","title":"The Fire Clay and Whitesburg coals in the Hyden quadrangle, Leslie, Clay, and Perry Counties, Kentucky","docAbstract":"This preliminary report on the coal in the Hyden quadrangle, Kentucky, presents data on two of the principal commercial coals. The Fire Clay is the most valuable commercial coal in the quadrangle, and locally the Whitesburg bed is of minable thickness. Special emphasis has been placed on determining the thickness, extent, composition, and structure of these beds, and on obtaining an accurate estimate of the coal reserves.
","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/coal5","usgsCitation":"Johnston, J.E., and Heck, W.A., 1950, The Fire Clay and Whitesburg coals in the Hyden quadrangle, Leslie, Clay, and Perry Counties, Kentucky: U.S. Geological Survey Coal Map 5, 31.88 x 36.15 inches, https://doi.org/10.3133/coal5.","productDescription":"31.88 x 36.15 inches","costCenters":[],"links":[{"id":359839,"rank":2,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/coal/005/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":188181,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/coal/005/report-thumb.jpg"}],"scale":"62500","country":"United States","state":"Kentucky","county":"Clay County, Leslie County, Perry County","otherGeospatial":"Hyden Quadrangle","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -83.5,37 ], [ -83.5,37.25 ], [ -83.25,37.25 ], [ -83.25,37 ], [ -83.5,37 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ac9e4b07f02db67c82d","contributors":{"authors":[{"text":"Johnston, John Edward","contributorId":27946,"corporation":false,"usgs":true,"family":"Johnston","given":"John","email":"","middleInitial":"Edward","affiliations":[],"preferred":false,"id":279806,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Heck, W. A.","contributorId":207808,"corporation":false,"usgs":false,"family":"Heck","given":"W.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":279807,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":45873,"text":"ofr5047 - 1950 - Nine preliminary aeromagnetic maps covering Aitkin County and parts of Itasca, Kanabec, Koochiching, Mille Lacs, Pine, and St. Louis Counties, Minnesota","interactions":[],"lastModifiedDate":"2012-02-02T00:10:56","indexId":"ofr5047","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1950","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":"50-47","title":"Nine preliminary aeromagnetic maps covering Aitkin County and parts of Itasca, Kanabec, Koochiching, Mille Lacs, Pine, and St. Louis Counties, Minnesota","language":"ENGLISH","doi":"10.3133/ofr5047","usgsCitation":"Meuschke, J.L., 1950, Nine preliminary aeromagnetic maps covering Aitkin County and parts of Itasca, Kanabec, Koochiching, Mille Lacs, Pine, and St. Louis Counties, Minnesota (Superceded by: GP-97 thru GP-102): U.S. Geological Survey Open-File Report 50-47, 9 maps., https://doi.org/10.3133/ofr5047.","productDescription":"9 maps.","costCenters":[],"links":[{"id":169388,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"edition":"Superceded by: GP-97 thru GP-102","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd690ee4b0b29085102759","contributors":{"authors":[{"text":"Meuschke, J. L.","contributorId":53349,"corporation":false,"usgs":true,"family":"Meuschke","given":"J.","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":232201,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":1063,"text":"wsp1079B - 1950 - Ground-water resources of Gregg County, Texas, with a section on Stream runoff","interactions":[],"lastModifiedDate":"2016-08-19T15:27:11","indexId":"wsp1079B","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1950","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":"1079","chapter":"B","title":"Ground-water resources of Gregg County, Texas, with a section on Stream runoff","docAbstract":"Field work in the island of St. Croix, V. I., was carried on from December 1938 to April 1939 in connection with a test-drilling program for water sup- plies. The island is 21 miles long and has a maximum width of 6 miles. Its western part consists of a range of mountains flanked on the south by a rolling plain; its narrower eastern part is entirely mountainous. There are only a few small streams. The rolling and fiat lands are cultivated or are in grass, and the mountainous areas are either wooded or in grass. The average rain- fall of the island is 46.34 inches, but severe droughts and periods of excess precipitation are not uncommon. The island is made up of rocks of Upper Cretaceous age, mostly volcanic tufts and limestones known as the Mount Eagle volcanics; diorite intruded into the cretaceous rocks; and Oligocene to Miocene blue clays and yellow marls (the Jealousy formation and Kingshill marl, respectively). Alluvium is widely distributed. The Mount Eagle rocks were strongly folded in early Tertiary time and the Kingshill strata gently folded in post Lower-Miocene time along an east-northeast axis. Three early Tertiary cycles of erosion are recognized. After the folding of the Kingshill marl, streams followed the strike of the folded rocks in a westerly direction, but they gradually assumed southward courses across the marl plain and as a result a western area of old-age topography, a central area of late-mature topography, and an eastern area of early-mature topography have been created. Submerged reefs and emergent reefs and beaches indicate several fairly recent stands of the sea. Water for human consumption is obtained by collecting rain water in cis- terns, but water for other purposes is almost entirely supplied by wells which are generally less than 100 feet deep. Many dug wells are used, but in recent years drilled wells have been constructed. Most of them are discharged by wind-powered pumps of small capacity. Wells are developed in all the rocks mentioned (except coral reef), but the best yields are obtained from the alluvium. A maximum yield of 80 gallons a minute was obtained from a gravel-packed well in the alluvial valley at Fair Plain. Further exploration of the alluvium is recommended. The weathered diorite also appears to be a fairly good water-bearing formation. Test drilling showed that deep water- bearing formations should probably not be expected beneath the Tertiary rocks. Most of the ground waters of St. Croix contain a moderately high mineral content owing to the solution of rock-forming minerals and the deposition of alkali and salt spray in the soil. Only a few wells are contaminated by sea water. The low hardness of some highly mineralized waters is believe due to base exchange. The most highly mineralized waters are found in the alluvium in areas with alkali soil and in some places in the Tertiary limestones where presumably soluble salts were deposited in those strata. The least mineralized waters are found in shallow wells in the alluvial near the foot of the mountains and in the areas of dioritic rock. Many well waters in Croix, if properly protected from contamination might be entirely suited to human consumption. Although many waters are hard, they are used for domestic purposes. Most waters, even those high in chloride, are reported to be excellent for cattle consumption. Most ground waters in St. Croix cannot be used for boiler feed without treatment but are used for o*her purposes in the manufacture of sugar and rum. A brief discussion of the results of test drilling by the National Park Service in 1940-41 is also given.
","language":"English","publisher":"U.S. Government Printing Office","publisherLocation":"Washington, D.C.","doi":"10.3133/wsp1079B","usgsCitation":"Broadhurst, W., and Breeding, S., 1950, Ground-water resources of Gregg County, Texas, with a section on Stream runoff: U.S. Geological Survey Water Supply Paper 1079, 48 p., https://doi.org/10.3133/wsp1079B.","productDescription":"48 p.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":583,"text":"Texas Water Science Center","active":true,"usgs":true}],"links":[{"id":138101,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/wsp/1079b/report-thumb.jpg"},{"id":25742,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/wsp/1079b/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a9ae4b07f02db65d7c8","contributors":{"authors":[{"text":"Broadhurst, W. L.","contributorId":55414,"corporation":false,"usgs":true,"family":"Broadhurst","given":"W. L.","affiliations":[],"preferred":false,"id":143113,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Breeding, S.D.","contributorId":73983,"corporation":false,"usgs":true,"family":"Breeding","given":"S.D.","email":"","affiliations":[],"preferred":false,"id":143114,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}} ,{"id":44137,"text":"ofr5031 - 1950 - Surficial geologic map of parts of Billerica, Wilmington, and Lexington quadrangles, Massachusetts","interactions":[],"lastModifiedDate":"2012-02-02T00:04:57","indexId":"ofr5031","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1950","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":"50-31","title":"Surficial geologic map of parts of Billerica, Wilmington, and Lexington quadrangles, Massachusetts","language":"ENGLISH","doi":"10.3133/ofr5031","usgsCitation":"Castle, R.O., 1950, Surficial geologic map of parts of Billerica, Wilmington, and Lexington quadrangles, Massachusetts: U.S. Geological Survey Open-File Report 50-31, 1 map, https://doi.org/10.3133/ofr5031.","productDescription":"1 map","costCenters":[],"links":[{"id":134677,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":81511,"rank":400,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1950/0031/plate-1.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae3e4b07f02db68912c","contributors":{"authors":[{"text":"Castle, Robert O.","contributorId":22741,"corporation":false,"usgs":true,"family":"Castle","given":"Robert","email":"","middleInitial":"O.","affiliations":[],"preferred":false,"id":229219,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":34873,"text":"b969C - 1950 - A geologic reconnaissance of parts of Beaverhead and Madison Counties, Montana","interactions":[],"lastModifiedDate":"2012-02-02T00:09:24","indexId":"b969C","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1950","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":306,"text":"Bulletin","code":"B","active":false,"publicationSubtype":{"id":5}},"seriesNumber":"969","chapter":"C","title":"A geologic reconnaissance of parts of Beaverhead and Madison Counties, Montana","language":"ENGLISH","publisher":"Geological Survey (U.S.)","doi":"10.3133/b969C","usgsCitation":"Klepper, M.R., 1950, A geologic reconnaissance of parts of Beaverhead and Madison Counties, Montana: U.S. Geological Survey Bulletin 969, p. 55-85, 24 cm. **DJVU MISSING PAGES 82 & 83**, https://doi.org/10.3133/b969C.","productDescription":"p. 55-85, 24 cm. **DJVU MISSING PAGES 82 & 83**","costCenters":[{"id":595,"text":"U.S. Geological Survey","active":false,"usgs":true}],"links":[{"id":109622,"rank":700,"type":{"id":15,"text":"Index Page"},"url":"https://ngmdb.usgs.gov/Prodesc/proddesc_21224.htm","linkFileType":{"id":5,"text":"html"},"description":"21224"},{"id":96689,"rank":401,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/bul/0969c/plate-16.pdf","size":"2207","linkFileType":{"id":1,"text":"pdf"}},{"id":96688,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/bul/0969c/report.pdf","size":"2449","linkFileType":{"id":1,"text":"pdf"}},{"id":163222,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/bul/0969c/report-thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b24e4b07f02db6ae615","contributors":{"authors":[{"text":"Klepper, Montis Ruhl","contributorId":27431,"corporation":false,"usgs":true,"family":"Klepper","given":"Montis","email":"","middleInitial":"Ruhl","affiliations":[],"preferred":false,"id":213742,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":16053,"text":"ofr5024 - 1950 - Correlation between test holes in the Centralia-Chehalis coal district, Washington","interactions":[{"subject":{"id":16053,"text":"ofr5024 - 1950 - Correlation between test holes in the Centralia-Chehalis coal district, Washington","indexId":"ofr5024","publicationYear":"1950","noYear":false,"title":"Correlation between test holes in the Centralia-Chehalis coal district, Washington"},"predicate":"SUPERSEDED_BY","object":{"id":35895,"text":"b1053 - 1958 - Geology and coal resources of the Centralia-Chehalis district, Washington","indexId":"b1053","publicationYear":"1958","noYear":false,"title":"Geology and coal resources of the Centralia-Chehalis district, Washington"},"id":1}],"supersededBy":{"id":35895,"text":"b1053 - 1958 - Geology and coal resources of the Centralia-Chehalis district, Washington","indexId":"b1053","publicationYear":"1958","noYear":false,"title":"Geology and coal resources of the Centralia-Chehalis district, Washington"},"lastModifiedDate":"2012-02-02T00:07:09","indexId":"ofr5024","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1950","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":"50-24","title":"Correlation between test holes in the Centralia-Chehalis coal district, Washington","language":"ENGLISH","publisher":"U.S. Geological Survey,","doi":"10.3133/ofr5024","usgsCitation":"Snavely, P.D., 1950, Correlation between test holes in the Centralia-Chehalis coal district, Washington (Superceded by: B-1053): U.S. Geological Survey Open-File Report 50-24, 3 p; folded chart ;29 cm., https://doi.org/10.3133/ofr5024.","productDescription":"3 p; folded chart ;29 cm.","costCenters":[],"links":[{"id":148304,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"edition":"Superceded by: B-1053","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae0e4b07f02db68839c","contributors":{"authors":[{"text":"Snavely, Parke Detweiler Jr.","contributorId":48535,"corporation":false,"usgs":true,"family":"Snavely","given":"Parke","suffix":"Jr.","email":"","middleInitial":"Detweiler","affiliations":[],"preferred":false,"id":172153,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":16260,"text":"ofr5022 - 1950 - Exploration of the Buckhorn Mica Pegmatite mine, Larimer County, Colorado","interactions":[],"lastModifiedDate":"2012-02-02T00:07:09","indexId":"ofr5022","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1950","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":"50-22","title":"Exploration of the Buckhorn Mica Pegmatite mine, Larimer County, Colorado","language":"ENGLISH","publisher":"[U.S. Geological Survey],","doi":"10.3133/ofr5022","usgsCitation":"Thurston, W.R., 1950, Exploration of the Buckhorn Mica Pegmatite mine, Larimer County, Colorado: U.S. Geological Survey Open-File Report 50-22, 3 p.; 5 plans ;29 cm., https://doi.org/10.3133/ofr5022.","productDescription":"3 p.; 5 plans ;29 cm.","costCenters":[],"links":[{"id":148288,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1950/0022/report-thumb.jpg"},{"id":45180,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1950/0022/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4a06e4b07f02db5f8c5f","contributors":{"authors":[{"text":"Thurston, W. R.","contributorId":9277,"corporation":false,"usgs":true,"family":"Thurston","given":"W.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":172508,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":16245,"text":"ofr509 - 1950 - Structural geology of the Terlingua quicksilver district, Texas","interactions":[{"subject":{"id":16245,"text":"ofr509 - 1950 - Structural geology of the Terlingua quicksilver district, Texas","indexId":"ofr509","publicationYear":"1950","noYear":false,"title":"Structural geology of the Terlingua quicksilver district, Texas"},"predicate":"SUPERSEDED_BY","object":{"id":39759,"text":"pp312 - 1959 - Geology and quicksilver deposits of the Terlingua district, Texas","indexId":"pp312","publicationYear":"1959","noYear":false,"title":"Geology and quicksilver deposits of the Terlingua district, Texas"},"id":1}],"supersededBy":{"id":39759,"text":"pp312 - 1959 - Geology and quicksilver deposits of the Terlingua district, Texas","indexId":"pp312","publicationYear":"1959","noYear":false,"title":"Geology and quicksilver deposits of the Terlingua district, Texas"},"lastModifiedDate":"2024-12-20T15:02:54.067923","indexId":"ofr509","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1950","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":"50-9","title":"Structural geology of the Terlingua quicksilver district, Texas","docAbstract":"Geologic mapping, supplemented by detailed investigations at the mines, has revealed new information about the geologic structure of the Terlingua quicksilver district, Texas. Attention is focused on the nature and origin of domes, grabens, and breccia pipes, structures that are unusually well developed in the area. The sedimentary rocks, of Cretaceous age, are overlain and intruded by igneous rocks of Tertiary age. Much of the structural deformation was an accompaniment of igneous intrusion.
The Terlingua uplift, an irregular dome with a structural relief of several thousand feet, covers about half of the district. The southern boundary of the uplift is a steep monocline. Smaller domes, found throughout the district, were formed by igneous uplift. Evidence for this origin includes exposures of the igneous rock, the occurrence of baked rock on the domes, and theoretical consideration of the forces necessary to form a dome.
Almost all the major faults are normal faults bounding depressed tracts, or grabens. Most of the major faults trend northwest; the strike varies markedly, with both sinuous curves and angular turns. The vertical displacement of the grabens below adjacent blocks varies, up to approximately 2,000 feet. Minor faults belong to two sets; one set trends northwest, parallel to the major faults, and the other northeast.
Masses of breccia with a pipelike or chimneylike shape have been designated descriptively as breccia-filled pipes, or simply breccia pipes. A total of 76 breccia pipes was mapped, and four typical breccia pipes are described in detail. They range from 75 feet to 500 feet in diameter, and one has been explored vertically for more than 800 feet. The top of one breccia pipe has been found, in the Chisos mine, but the bottom of none has been found. The displacement of the fragments is downward, commonly several hundred feet, and in one instance more than 1,000 feet. The nature of the breccia and its walls indicates collapse due to undermining as the origin of the Terlingua pipes. Features, common to all the pipes, that point to this origin are the downward displacement of the fragments, the absence of drag or thrust structures, the presence of slump structures along the walls, and the vertical cylindrical form.
The general structural problems of the district include the age relations, the origin of the uplift, the origin of the domes, and the origin of the grabens. The earliest structural movement involving the Cretaceous rocks was the beginning of rise of the Terlingua uplift. Before this rise ceased, the graben faulting probably began. Volcanism and widespread hypabyssal intrusion, which was accompanied by doming, was partly contemporaneous with graben faulting. The breccia pipes were formed after the beginning, and before the end, of igneous activity. Minor faulting, accompanied by mineralization, continued later than other structural movements, The Terlingua uplift was probably caused primarily by laccolithic igneous intrusion but was influenced by horizontal compression. A basic intrusion, rather than a silicic intrusion, is required to explain the exposed igneous rocks. The geometry of the large grabens indicates that they are relatively superficial accompaniments of horizontal extension. It is suggested that horizontal extension of the upper part of the earth's crust occurred during the formation of the Terlingua uplift and was accompanied by graben faulting.
","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr509","usgsCitation":"Thompson, G.A., 1950, Structural geology of the Terlingua quicksilver district, Texas (Superceded by PP 312): U.S. Geological Survey Open-File Report 50-9, Report: vii, 81 p.; Plate: 63.29 x 19.90 inches, https://doi.org/10.3133/ofr509.","productDescription":"Report: vii, 81 p.; Plate: 63.29 x 19.90 inches","costCenters":[],"links":[{"id":148259,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/of/1950/0009/report-thumb.jpg"},{"id":465394,"rank":2,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/1950/0009/report.pdf","linkFileType":{"id":1,"text":"pdf"}},{"id":465395,"rank":3,"type":{"id":17,"text":"Plate"},"url":"https://pubs.usgs.gov/of/1950/0009/plate-1.pdf"}],"scale":"25000","country":"United States","state":"Texas","otherGeospatial":"Terlingua quicksilver district","geographicExtents":"{\n \"type\": \"FeatureCollection\",\n \"features\": [\n {\n \"type\": \"Feature\",\n \"properties\": {},\n \"geometry\": {\n \"coordinates\": [\n [\n [\n -104.68860970649406,\n 29.973169828363282\n ],\n [\n -104.68860970649406,\n 28.96907322607484\n ],\n [\n -102.46011509896579,\n 28.96907322607484\n ],\n [\n -102.46011509896579,\n 29.973169828363282\n ],\n [\n -104.68860970649406,\n 29.973169828363282\n ]\n ]\n ],\n \"type\": \"Polygon\"\n }\n }\n ]\n}","edition":"Superceded by PP 312","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b15e4b07f02db6a49cd","contributors":{"authors":[{"text":"Thompson, George Albert Jr.","contributorId":43367,"corporation":false,"usgs":true,"family":"Thompson","given":"George","suffix":"Jr.","email":"","middleInitial":"Albert","affiliations":[],"preferred":false,"id":172488,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":44054,"text":"ofr5037 - 1950 - Ten preliminary aeromagnetic maps covering Clark, Floyd, Hamilton, Hancock, Harrison, Jackson, Jefferson, Madison, Tipton, and Washington Counties, Indiana","interactions":[],"lastModifiedDate":"2012-02-02T00:10:31","indexId":"ofr5037","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1950","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":"50-37","title":"Ten preliminary aeromagnetic maps covering Clark, Floyd, Hamilton, Hancock, Harrison, Jackson, Jefferson, Madison, Tipton, and Washington Counties, Indiana","language":"ENGLISH","doi":"10.3133/ofr5037","issn":"ma","usgsCitation":"Henderson, J., 1950, Ten preliminary aeromagnetic maps covering Clark, Floyd, Hamilton, Hancock, Harrison, Jackson, Jefferson, Madison, Tipton, and Washington Counties, Indiana (Superceded by: GP-54, GP-58, GP-60, GP-61, GP-62, GP-64, GP-67, GP-75, GP-76, GP-85): U.S. Geological Survey Open-File Report 50-37, 10 maps., https://doi.org/10.3133/ofr5037.","productDescription":"10 maps.","costCenters":[],"links":[{"id":172452,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"edition":"Superceded by: GP-54, GP-58, GP-60, GP-61, GP-62, GP-64, GP-67, GP-75, GP-76, GP-85","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd768fe4b0b2908510af81","contributors":{"authors":[{"text":"Henderson, John R.","contributorId":93445,"corporation":false,"usgs":true,"family":"Henderson","given":"John R.","affiliations":[],"preferred":false,"id":229064,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":44129,"text":"ofr5038 - 1950 - Two preliminary aeromagnetic maps covering Johnson and Marion Counties, Indiana","interactions":[],"lastModifiedDate":"2012-02-02T00:10:11","indexId":"ofr5038","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1950","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":"50-38","title":"Two preliminary aeromagnetic maps covering Johnson and Marion Counties, Indiana","language":"ENGLISH","doi":"10.3133/ofr5038","issn":"ma","usgsCitation":"Henderson, J., 1950, Two preliminary aeromagnetic maps covering Johnson and Marion Counties, Indiana (Superceded by: GP-107 and P-109): U.S. Geological Survey Open-File Report 50-38, 2 maps., https://doi.org/10.3133/ofr5038.","productDescription":"2 maps.","costCenters":[],"links":[{"id":162433,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"edition":"Superceded by: GP-107 and P-109","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4afce4b07f02db696570","contributors":{"authors":[{"text":"Henderson, John R.","contributorId":93445,"corporation":false,"usgs":true,"family":"Henderson","given":"John R.","affiliations":[],"preferred":false,"id":229205,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":42181,"text":"ofr5028 - 1950 - Aeromagnetic-geologic maps of Cranberry Lake, Starke, and Childwood quadrangles and part of Russel quadrangle, New York","interactions":[],"lastModifiedDate":"2012-02-02T00:10:29","indexId":"ofr5028","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1950","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":"50-28","title":"Aeromagnetic-geologic maps of Cranberry Lake, Starke, and Childwood quadrangles and part of Russel quadrangle, New York","language":"ENGLISH","doi":"10.3133/ofr5028","usgsCitation":"Balsley, J.R., 1950, Aeromagnetic-geologic maps of Cranberry Lake, Starke, and Childwood quadrangles and part of Russel quadrangle, New York (Superceded by: GP-117 AND GP-118): U.S. Geological Survey Open-File Report 50-28, 2 maps, https://doi.org/10.3133/ofr5028.","productDescription":"2 maps","costCenters":[],"links":[{"id":172342,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"edition":"Superceded by: GP-117 AND GP-118","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4ae4e4b07f02db689bca","contributors":{"authors":[{"text":"Balsley, J. R. Jr.","contributorId":79535,"corporation":false,"usgs":true,"family":"Balsley","given":"J.","suffix":"Jr.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":226040,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ,{"id":52973,"text":"ofr5092 - 1950 - List of references pertaining to electrical well logging","interactions":[],"lastModifiedDate":"2020-02-28T06:55:48","indexId":"ofr5092","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1950","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":"50-92","title":"List of references pertaining to electrical well logging","docAbstract":"No abstract available.
","language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/ofr5092","usgsCitation":"Richardson, R.M., 1950, List of references pertaining to electrical well logging: U.S. Geological Survey Open-File Report 50-92, 29 p., https://doi.org/10.3133/ofr5092.","productDescription":"29 p.","costCenters":[],"links":[{"id":177991,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e4b15e4b07f02db6a4f1c","contributors":{"authors":[{"text":"Richardson, R. M.","contributorId":222843,"corporation":false,"usgs":false,"family":"Richardson","given":"R.","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":783326,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}} ]}