{"pageNumber":"6543","pageRowStart":"163550","pageSize":"25","recordCount":185189,"records":[{"id":70198168,"text":"70198168 - 1968 - Shatter cones at Sierra Madera, Texas","interactions":[],"lastModifiedDate":"2018-07-18T11:46:38","indexId":"70198168","displayToPublicDate":"1968-12-31T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Shatter cones at Sierra Madera, Texas","docAbstract":"<p><span>Shatter cones abound in the central uplift of Sierra Madera and they occur as far as 6.5 kilometers from the center. Apical angles average near 90 degrees. Whole cones and full cones represented by diversely oriented cone segments in any structural block show relatively uniform orientations of axes and a dominant direction of point. The cones predate faulting and folding in the central uplift, and, when beds are restored to horizontal, most cones point inward and upward, a pattern that supports the hypothesis of an impact origin.</span></p>","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.162.3850.261","usgsCitation":"Howard, K.A., and Offield, T.W., 1968, Shatter cones at Sierra Madera, Texas: Science, v. 162, no. 3850, p. 261-265, https://doi.org/10.1126/science.162.3850.261.","productDescription":"5 p.","startPage":"261","endPage":"265","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":355777,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Texas","county":"Pecos County","otherGeospatial":"Sierra Madera crater","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -103.326416015625,\n              29.878755346037977\n            ],\n            [\n              -101.25,\n              29.878755346037977\n            ],\n            [\n              -101.25,\n              31.662732913235317\n            ],\n            [\n              -103.326416015625,\n              31.662732913235317\n            ],\n            [\n              -103.326416015625,\n              29.878755346037977\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"162","issue":"3850","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Howard, Keith A. 0000-0002-6462-2947 khoward@usgs.gov","orcid":"https://orcid.org/0000-0002-6462-2947","contributorId":3439,"corporation":false,"usgs":true,"family":"Howard","given":"Keith","email":"khoward@usgs.gov","middleInitial":"A.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":740395,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Offield, Terry W.","contributorId":15196,"corporation":false,"usgs":true,"family":"Offield","given":"Terry","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":740396,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70197571,"text":"70197571 - 1968 - Chittenden, California, earthquake of September 14, 1963","interactions":[],"lastModifiedDate":"2018-06-12T11:28:46","indexId":"70197571","displayToPublicDate":"1968-12-31T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":2,"text":"State or Local Government Series"},"seriesTitle":{"id":5711,"text":"California Division of Mines and Geology Special Report","active":true,"publicationSubtype":{"id":2}},"seriesNumber":"91","title":"Chittenden, California, earthquake of September 14, 1963","docAbstract":"<p>No abstract available.</p>","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Short contributions to California geology","largerWorkSubtype":{"id":2,"text":"State or Local Government Series"},"language":"English","publisher":"California Division of Mines and Geology","usgsCitation":"Brabb, E.E., 1968, Chittenden, California, earthquake of September 14, 1963: California Division of Mines and Geology Special Report 91, 11 p.","productDescription":"11 p.","startPage":"45","endPage":"55","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":354939,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Brabb, E. E.","contributorId":43780,"corporation":false,"usgs":true,"family":"Brabb","given":"E.","middleInitial":"E.","affiliations":[],"preferred":false,"id":737712,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70198175,"text":"70198175 - 1968 - Flow direction in triclinic folded rocks","interactions":[],"lastModifiedDate":"2018-07-18T14:27:30","indexId":"70198175","displayToPublicDate":"1968-12-31T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":732,"text":"American Journal of Science","active":true,"publicationSubtype":{"id":10}},"title":"Flow direction in triclinic folded rocks","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"American Journal of Science","doi":"10.2475/ajs.266.9.758","usgsCitation":"Howard, K.A., 1968, Flow direction in triclinic folded rocks: American Journal of Science, v. 266, no. 9, p. 758-765, https://doi.org/10.2475/ajs.266.9.758.","productDescription":"8 p.","startPage":"758","endPage":"765","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":480329,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.2475/ajs.266.9.758","text":"Publisher Index Page"},{"id":355800,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Nevada","otherGeospatial":"Ruby Mountains","volume":"266","issue":"9","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Howard, Keith A. 0000-0002-6462-2947 khoward@usgs.gov","orcid":"https://orcid.org/0000-0002-6462-2947","contributorId":3439,"corporation":false,"usgs":true,"family":"Howard","given":"Keith","email":"khoward@usgs.gov","middleInitial":"A.","affiliations":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":740430,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70197756,"text":"70197756 - 1968 - Isotopic age of the Nevadan Orogeny and older Plutonic and metamorphic events in the Klamath Mountains, California","interactions":[],"lastModifiedDate":"2018-06-19T16:38:58","indexId":"70197756","displayToPublicDate":"1968-12-31T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1723,"text":"GSA Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Isotopic age of the Nevadan Orogeny and older Plutonic and metamorphic events in the Klamath Mountains, California","docAbstract":"<p><span>Several metamorphic and plutonic events have been recognized in the Klamath Mountains utilizing potassium-argon and rubidium-strontium mineral and whole-rock ages. The oldest known metamorphic event in the region produced the Abrams Mica Schist and the co-extensive Salmon Hornblende Schist. Strontium evolution diagrams indicate that the age of primary metamorphism of the Abrams Mica Schist is approximately 380 m.y. (Devonian). The Stuart Fork Formation of Davis and Lipman (1962), the schists of Condrey Mountain, and related schists were produced during a Middle and Late Jurassic metamorphic event. Granitic plutonic rocks are divided into four groups that are different in age and somewhat different in chemical characteristics. The oldest pluton, the Pit River stock, has a minimum age of 246 m.y. (Permian) and is grouped with the Castle Crags pluton. The other three plutonic groups are Middle and Late Jurassic and are characterized by the following ranges in isotopic age: 165 to 167 m.y., 145 to 155 m.y., and 127 to 140 m.y. The principal lode gold deposits in the California part of the Klamath Mountains seem to be related to the youngest group of plutons. If the Nevadan orogeny in this area is restricted to a Middle and Late Jurassic deformational, metamorphic, and plutonic event, the orogeny includes the emplacement of plutons of the three younger groups and the metamorphic development of the Stuart Fork Formation, schists of Condrey Mountain, and related schists.</span></p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1968)79[1027:IAOTNO]2.0.CO;2","usgsCitation":"Lanphere, M.A., Irwin, W., and Hotz, P.E., 1968, Isotopic age of the Nevadan Orogeny and older Plutonic and metamorphic events in the Klamath Mountains, California: GSA Bulletin, v. 79, no. 8, p. 1027-1052, https://doi.org/10.1130/0016-7606(1968)79[1027:IAOTNO]2.0.CO;2.","productDescription":"36 p.","startPage":"1027","endPage":"1052","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":355176,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"Klamath Mountains","volume":"79","issue":"8","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Lanphere, Marvin A. alder@usgs.gov","contributorId":2696,"corporation":false,"usgs":true,"family":"Lanphere","given":"Marvin","email":"alder@usgs.gov","middleInitial":"A.","affiliations":[],"preferred":true,"id":738396,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Irwin, William P.","contributorId":12889,"corporation":false,"usgs":true,"family":"Irwin","given":"William P.","affiliations":[],"preferred":false,"id":738397,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hotz, Preston E.","contributorId":37083,"corporation":false,"usgs":true,"family":"Hotz","given":"Preston","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":738398,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70207552,"text":"70207552 - 1968 - Mineralogy of sulfides from certain Hawaiian basalts","interactions":[],"lastModifiedDate":"2020-06-04T13:46:31.899091","indexId":"70207552","displayToPublicDate":"1968-12-23T12:34:58","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Mineralogy of sulfides from certain Hawaiian basalts","docAbstract":"<p><span>Polymineralic sulfide grains, composed principally of Fe sulfide and Fe-Cu sulfide, with magnetite, have been studied mineragraphically and by electron probe, and interpreted in terms of experimental data for the system Fe-Ni-Cu-S. The three main phases are monosulfide solid solution, a Cu-Fe sulfide (solid solution) with composition near cubanite, and Ti-free magnetite. The grains are believed to represent phases unmixed from an immiscible liquid phase in the basalt magma. Compositions of the two main sulfide phases suggest quenching below 700 degrees C. Most of the Ni has been retained in the monosulfide solid solution by rapid quenching.</span></p>","language":"English","publisher":"American Geological Institute","doi":"10.2113/gsecongeo.63.6.636","usgsCitation":"Desborough, G.A., Anderson, A.T., and Wright, T., 1968, Mineralogy of sulfides from certain Hawaiian basalts: Economic Geology, v. 63, no. 6, p. 636-644, https://doi.org/10.2113/gsecongeo.63.6.636.","productDescription":"9 p.","startPage":"636","endPage":"644","costCenters":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"links":[{"id":370652,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Hawaii","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -155.56640625,\n              18.521283325496277\n            ],\n            [\n              -154.22607421875,\n              19.766703551716976\n            ],\n            [\n              -156.357421875,\n              21.22794190505815\n            ],\n            [\n              -158.84033203125,\n              22.30942584120019\n            ],\n            [\n              -160.33447265625,\n              22.43134015636061\n            ],\n            [\n              -160.46630859375,\n              21.861498734372567\n            ],\n            [\n              -155.54443359374997,\n              18.437924653474408\n            ],\n            [\n              -155.56640625,\n              18.521283325496277\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"63","issue":"6","noUsgsAuthors":false,"publicationDate":"1968-09-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Desborough, G. A.","contributorId":34527,"corporation":false,"usgs":true,"family":"Desborough","given":"G.","email":"","middleInitial":"A.","affiliations":[],"preferred":false,"id":778443,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Anderson, Alfred T.","contributorId":210019,"corporation":false,"usgs":false,"family":"Anderson","given":"Alfred","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":778444,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wright, Thomas L. twright@usgs.gov","contributorId":3890,"corporation":false,"usgs":true,"family":"Wright","given":"Thomas L.","email":"twright@usgs.gov","affiliations":[{"id":617,"text":"Volcano Science Center","active":true,"usgs":true}],"preferred":true,"id":778445,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70209027,"text":"70209027 - 1968 - Ancient geomagnetic field intensities—III historic and archeological data: H13X and H14-15 geological data: G22-29","interactions":[],"lastModifiedDate":"2020-03-11T18:19:46","indexId":"70209027","displayToPublicDate":"1968-12-01T18:15:51","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1804,"text":"Geophysical Journal of the Royal Astronomical Society","active":true,"publicationSubtype":{"id":10}},"title":"Ancient geomagnetic field intensities—III historic and archeological data: H13X and H14-15 geological data: G22-29","docAbstract":"<p><span>This catalogue contains all ancient geomagnetic field intensity data known to the author at 1968 June 1 and not previously appearing in these lists (</span><a class=\"link link-ref link-reveal xref-bibr\" data-open=\"bib23\">Smith 1967c</a><span>,&nbsp;</span><a class=\"link link-ref link-reveal xref-bibr\" data-open=\"bib24\">d</a><span>). In addition, a short list of publications relevant to the study of ancient field intensities, but containing no new data, is included.</span></p>","language":"English","publisher":"Oxford Academic","doi":"10.1111/j.1365-246X.1968.tb02308.x","usgsCitation":"Smith, P., 1968, Ancient geomagnetic field intensities—III historic and archeological data: H13X and H14-15 geological data: G22-29: Geophysical Journal of the Royal Astronomical Society, v. 16, no. 5, p. 457-460, https://doi.org/10.1111/j.1365-246X.1968.tb02308.x.","productDescription":"4 p.","startPage":"457","endPage":"460","costCenters":[],"links":[{"id":480330,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1365-246x.1968.tb02308.x","text":"Publisher Index Page"},{"id":373148,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"16","issue":"5","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Smith, P.J.","contributorId":6579,"corporation":false,"usgs":true,"family":"Smith","given":"P.J.","email":"","affiliations":[],"preferred":false,"id":784576,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70221382,"text":"70221382 - 1968 - Aquilapollenites: Fossil pollen as seen under the scanning electron microscope","interactions":[],"lastModifiedDate":"2021-06-11T18:44:10.107781","indexId":"70221382","displayToPublicDate":"1968-12-01T13:35:56","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1786,"text":"Geological Society of America Bulletin","active":true,"publicationSubtype":{"id":10}},"title":"Aquilapollenites: Fossil pollen as seen under the scanning electron microscope","docAbstract":"<p><span>Photographs of a Late Cretaceous species of&nbsp;</span>Aquilapollenites<span>&nbsp;illustrate the usefulness of the&nbsp;</span>scanning<span>&nbsp;</span>electron<span>&nbsp;</span>microscope<span>&nbsp;(SEM) for the study of&nbsp;</span>fossil<span>&nbsp;</span>pollen<span>. The SEM has the advantages of great depth of focus and wide range of magnification; using present techniques, its use for the study of unsectioned specimens is limited to the observation of surface detail.</span></p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/0016-7606(1968)79[1829:AFPASU]2.0.CO;2","usgsCitation":"Drew, C., and Tschudy, B.D., 1968, Aquilapollenites: Fossil pollen as seen under the scanning electron microscope: Geological Society of America Bulletin, v. 79, no. 12, p. 1829-1832, https://doi.org/10.1130/0016-7606(1968)79[1829:AFPASU]2.0.CO;2.","productDescription":"4 p.","startPage":"1829","endPage":"1832","costCenters":[],"links":[{"id":386445,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"79","issue":"12","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Drew, C.M.","contributorId":53089,"corporation":false,"usgs":true,"family":"Drew","given":"C.M.","email":"","affiliations":[],"preferred":false,"id":817461,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tschudy, Bernadine D.","contributorId":74746,"corporation":false,"usgs":true,"family":"Tschudy","given":"Bernadine","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":817462,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70221376,"text":"70221376 - 1968 - Salt deposits of the paradox basin, southeast Utah and southwest Colorado","interactions":[],"lastModifiedDate":"2021-06-11T17:21:26.347202","indexId":"70221376","displayToPublicDate":"1968-12-01T12:17:18","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3459,"text":"Special Paper of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Salt deposits of the paradox basin, southeast Utah and southwest Colorado","docAbstract":"<p><span>Thick&nbsp;</span>salt<span>&nbsp;</span>deposits<span>&nbsp;are present in the Middle Pennsylvanian&nbsp;</span>Paradox<span>&nbsp;Member of the Hermosa Formation in the&nbsp;</span>Paradox<span>&nbsp;</span>Basin<span>&nbsp;of&nbsp;</span>southeast<span>&nbsp;</span>Utah<span>&nbsp;and&nbsp;</span>southwest<span>&nbsp;</span>Colorado<span>. Data suggest that the original thickness of these&nbsp;</span>deposits<span>&nbsp;was from 5000-6000 feet. Locally, however, these&nbsp;</span>deposits<span>&nbsp;have been subjected to intense deformation and flow, resulting in thicknesses as great as 14,000 feet. Each&nbsp;</span>salt<span>&nbsp;bed is part of a series of partial and complete evaporite cycles which show a lateral and vertical change in facies. Varve counts in the&nbsp;</span>salt<span>&nbsp;beds give an indication of deposition rates of time-equivalent carbonate beds. Black sapropelic shales are interbedded with the&nbsp;</span>salt<span>&nbsp;beds. It appears that the euxinic environment in which the shales were deposited persisted during the deposition of&nbsp;</span>salt<span>. An understanding of the stratigraphy of the&nbsp;</span>salt<span>&nbsp;</span>deposits<span>&nbsp;has made possible a more complete depiction of early tectonic events involving the&nbsp;</span>salt<span>&nbsp;</span>basin<span>. These studies indicate that many of the&nbsp;</span>salt<span>&nbsp;anticlines in the&nbsp;</span>basin<span>&nbsp;were formed along trends of originally thick&nbsp;</span>salt<span>&nbsp;beds, and that upward growth of these anticlines possibly began during the late stages of&nbsp;</span>salt<span>&nbsp;deposition.</span></p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/SPE88-p319","usgsCitation":"Hite, R.J., 1968, Salt deposits of the paradox basin, southeast Utah and southwest Colorado: Special Paper of the Geological Society of America, v. 88, https://doi.org/10.1130/SPE88-p319.","productDescription":"12 p.","startPage":"320","costCenters":[],"links":[{"id":386439,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United  States","state":"Utah, Colorado","otherGeospatial":"southeast Utah, southwest Colorado","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -111.4013671875,\n              37.055177106660814\n            ],\n            [\n              -107.09472656249999,\n              37.055177106660814\n            ],\n            [\n              -107.09472656249999,\n              38.75408327579141\n            ],\n            [\n              -111.4013671875,\n              38.75408327579141\n            ],\n            [\n              -111.4013671875,\n              37.055177106660814\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"88","edition":"319","noUsgsAuthors":false,"publicationDate":"1968-01-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Hite, R. J.","contributorId":82701,"corporation":false,"usgs":true,"family":"Hite","given":"R.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":817452,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70233751,"text":"70233751 - 1968 - A method for estimating the uncertainty of seismic velocities measured by refraction techniques","interactions":[],"lastModifiedDate":"2022-07-27T17:14:44.377534","indexId":"70233751","displayToPublicDate":"1968-12-01T12:02:26","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1135,"text":"Bulletin of the Seismological Society of America","onlineIssn":"1943-3573","printIssn":"0037-1106","active":true,"publicationSubtype":{"id":10}},"title":"A method for estimating the uncertainty of seismic velocities measured by refraction techniques","docAbstract":"<p>Time residuals from&nbsp;<i>7</i>5-km segments of 18 crustal seismic-refraction profiles in the Basin and Range province are used to investigate the validity of the linear-regression model and to make large sample estimates of the variance in the travel time distributions.</p><p>A formula for unbiased estimates of velocity uncertainty is derived, assuming a linear trend with distance for the variances of the travel-time distributions. If the recording units are symmetric about the center of the recording interval, this formula is equivalent to the one derived assuming the variances are equal.</p><p>At the 95-per cent confidence level the chi-squared test implied 84 per cent of the time-residual samples were inconsistent with the hypothesis that their parent populations had Gaussian distributions. If the number of recording locations expceeds 8, confidence limits computed without the Gaussian assumption suggest the departures from normality are not significant for velocity uncertainty estimates.</p><p>The large sample estimates of the time-residual populations may be applicable to other areas. This evidence motivated the development of a method, requiring very little numerical calculation, for estimating uncertainties in velocities. The method requires, in addition to the large sample estimates of the travel time variances, information on the quality of the data, the location of the recording interval, and the number of recording units. The method is useful for the design of new experiments and independent estimates of uncertainty reported in the literature.</p>","language":"English","publisher":"Seismological Society of America","doi":"10.1785/BSSA0580061769","usgsCitation":"Borcherdt, R.D., and Healy, J.H., 1968, A method for estimating the uncertainty of seismic velocities measured by refraction techniques: Bulletin of the Seismological Society of America, v. 58, no. 6, p. 1769-1790, https://doi.org/10.1785/BSSA0580061769.","productDescription":"22 p.","startPage":"1769","endPage":"1790","costCenters":[{"id":234,"text":"Earthquake Hazards Program","active":true,"usgs":true}],"links":[{"id":404500,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Arizona, California, Idaho, Nevada, Oregon, Utah","otherGeospatial":"Basin and Range province","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -117.57568359374999,\n              32.45415593941475\n            ],\n            [\n              -111.20361328125,\n              32.713355353177555\n            ],\n            [\n              -111.07177734375,\n              44.29240108529005\n            ],\n            [\n              -123.33251953125,\n              43.6599240747891\n            ],\n            [\n              -123.28857421875,\n              37.70120736474139\n            ],\n            [\n              -121.46484375,\n              34.32529192442733\n            ],\n            [\n              -118.67431640625,\n              32.41706632846282\n            ],\n            [\n              -117.57568359374999,\n              32.45415593941475\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"58","issue":"6","noUsgsAuthors":false,"publicationDate":"1968-12-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Borcherdt, Roger D. 0000-0002-8668-0849 borcherdt@usgs.gov","orcid":"https://orcid.org/0000-0002-8668-0849","contributorId":2373,"corporation":false,"usgs":true,"family":"Borcherdt","given":"Roger","email":"borcherdt@usgs.gov","middleInitial":"D.","affiliations":[{"id":237,"text":"Earthquake Science Center","active":true,"usgs":true}],"preferred":true,"id":847627,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Healy, J. H.","contributorId":48968,"corporation":false,"usgs":true,"family":"Healy","given":"J.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":847628,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70221363,"text":"70221363 - 1968 - Palaeomagnetism of a stratiform intrusion in the Pensacola Mountains, Antarctica","interactions":[],"lastModifiedDate":"2021-06-11T14:24:07.996549","indexId":"70221363","displayToPublicDate":"1968-12-01T09:17:32","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2840,"text":"Nature","active":true,"publicationSubtype":{"id":10}},"title":"Palaeomagnetism of a stratiform intrusion in the Pensacola Mountains, Antarctica","docAbstract":"<p><span>A LARGE stratiform mass of pyroxene gabbro interlayered with smaller amounts of anorthosite and pyroxenite and capped with granophyre makes up most of the northern ranges of the Pensacola Mountains (Fig. 1)</span><sup>1</sup><span>. These layered rocks are at least 2,000 m thick in both the Dufek Massif and the Forrestal Range, and are believed to belong to a single sheet-like body with an areal extent of at least 8,000 km</span><sup>2</sup><span>. The age of the body is not known with certainty, but it intrudes folded rocks as young as Permian (personal communication from J. M. Schopf) and therefore is probably Mesozoic or younger.</span></p>","language":"English","publisher":"Wiley","doi":"10.1038/217534a0","usgsCitation":"Beck, M.E., Ford, A., and Boyd, W., 1968, Palaeomagnetism of a stratiform intrusion in the Pensacola Mountains, Antarctica: Nature, v. 217, p. 534-535, https://doi.org/10.1038/217534a0.","productDescription":"2 p.","startPage":"534","endPage":"535","costCenters":[],"links":[{"id":386426,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Antarctica","volume":"217","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Beck, Myrl E. Jr.","contributorId":60700,"corporation":false,"usgs":true,"family":"Beck","given":"Myrl","suffix":"Jr.","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":817428,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ford, Arthur B.","contributorId":52578,"corporation":false,"usgs":true,"family":"Ford","given":"Arthur B.","affiliations":[],"preferred":false,"id":817429,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Boyd, W.W. Jr.","contributorId":103359,"corporation":false,"usgs":true,"family":"Boyd","given":"W.W.","suffix":"Jr.","email":"","affiliations":[],"preferred":false,"id":817430,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70221424,"text":"70221424 - 1968 - Stratigraphy and structure of the tatum salt dome area, southeastern Mississippi and northeastern Washington Parish, Louisiana","interactions":[],"lastModifiedDate":"2021-06-16T12:17:13.169348","indexId":"70221424","displayToPublicDate":"1968-12-01T08:50:51","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3459,"text":"Special Paper of the Geological Society of America","active":true,"publicationSubtype":{"id":10}},"title":"Stratigraphy and structure of the tatum salt dome area, southeastern Mississippi and northeastern Washington Parish, Louisiana","docAbstract":"<p><span>In the 3000-square-mile&nbsp;</span>area<span>&nbsp;of&nbsp;</span>southeastern<span>&nbsp;</span>Mississippi<span>&nbsp;and&nbsp;</span>northeastern<span>&nbsp;</span>Washington<span>&nbsp;</span>Parish<span>,&nbsp;</span>Louisiana<span>, which has&nbsp;</span>Tatum<span>&nbsp;</span>dome<span>&nbsp;in its center, rocks of known Jurassic to Recent age are more than 20,000 feet thick. They are underlain by an unknown thickness of Louann&nbsp;</span>Salt<span>&nbsp;of Jurassic (?) age. The age, thickness, and nature of the sedimentary rocks between the&nbsp;</span>salt<span>&nbsp;and the basement, as well as the character of the basement, are unknown. The&nbsp;</span>salt<span>&nbsp;in the northern half of the&nbsp;</span>area<span>&nbsp;has moved upward to shallow depths as diapirs in overlying rocks. Outside of the&nbsp;</span>area<span>&nbsp;of shallow-piercement domes there are more deeply seated domes, ridges, and anticlines that may be the result of vertical movement of the&nbsp;</span>salt<span>. The Wiggins anticline in the south and, southwest of it, an&nbsp;</span>area<span>&nbsp;dipping more steeply to the southwest probably were not affected by&nbsp;</span>salt<span>&nbsp;movement. Structural maps of four horizons and isopach maps of rocks in the three intervals between them give information about the sedimentary and structural history of the region since the end of Early Cretaceous time. The horizons contoured mark either unconformities or the upper boundaries of zones of fairly uniform structural history. The top of the Lower Cretaceous rocks dips generally to the west. Upper Cretaceous rocks dip to the west-southwest and thicken to the northeast. Pre-Miocene Tertiary rocks dip to the southwest and thicken to the northwest. Miocene and later rocks dip and thicken to the south-southwest. The&nbsp;</span>structure<span>&nbsp;of the older formations is considerably more irregular than that of the younger ones; domes, ridges, and basins that were conspicuous in the Early Cretaceous became less pronounced as younger sediments progressively covered them. Of the eight shallow-piercement domes with which the author is familiar, three are known to have penetrated Oligocene rocks; two, middle Eocene; one, lower Eocene; one, Upper Cretaceous; and one, Lower Cretaceous. Some movement has taken place at&nbsp;</span>Tatum<span>&nbsp;</span>dome<span>&nbsp;since the sandy, gravelly Citronelle Formation was laid down.</span></p>","language":"English","publisher":"Geological Society of America","doi":"10.1130/SPE88-p381","usgsCitation":"Eargle, D.H., 1968, Stratigraphy and structure of the tatum salt dome area, southeastern Mississippi and northeastern Washington Parish, Louisiana: Special Paper of the Geological Society of America, v. 88, p. 381-405, https://doi.org/10.1130/SPE88-p381.","productDescription":"25 p.","startPage":"381","endPage":"405","costCenters":[],"links":[{"id":386491,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Louisiana, Mississippi","otherGeospatial":"southeastern Mississippi and northeastern Washington Parish, Louisiana","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -92.52685546875,\n              32.11980111179328\n            ],\n            [\n              -91.021728515625,\n              32.11980111179328\n            ],\n            [\n              -91.021728515625,\n              33.797408767572485\n            ],\n            [\n              -92.52685546875,\n              33.797408767572485\n            ],\n            [\n              -92.52685546875,\n              32.11980111179328\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"88","noUsgsAuthors":false,"publicationDate":"1968-01-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Eargle, D. H.","contributorId":28649,"corporation":false,"usgs":true,"family":"Eargle","given":"D.","email":"","middleInitial":"H.","affiliations":[],"preferred":false,"id":817673,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70206752,"text":"70206752 - 1968 - Lead and strontium isotope studies of the Boulder Batholith, Southwestern Montana","interactions":[],"lastModifiedDate":"2019-11-21T08:02:13","indexId":"70206752","displayToPublicDate":"1968-12-01T07:58:55","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Lead and strontium isotope studies of the Boulder Batholith, Southwestern Montana","docAbstract":"<p><span>The isotopic composition of lead in feldspar varies widely from pluton to pluton of the Late Cretaceous Boulder batholith, encompassing the following ranges in isotopic values: 16.9-18.1 for Pb&nbsp;</span><sup>206</sup><span>/Pb&nbsp;</span><sup>204</sup><span>; 15.4-15.7 for Pb&nbsp;</span><sup>207</sup><span>/Pb&nbsp;</span><sup>204</sup><span>; and 37.7-38.5 for Pb&nbsp;</span><sup>205</sup><span>/Pb&nbsp;</span><sup>204</sup><span>. Although each pluton has a characteristic isotopic composition, the fact that Pb&nbsp;</span><sup>206</sup><span>/Pb&nbsp;</span><sup>204</sup><span>&nbsp;for the Butte Quartz Monzonite varies by 1.3 percent, compared to a range of about 8.6 percent for the batholith as a whole, suggests that perfect isotopic mixing of the magma was not always attained. Whole rock initial Sr&nbsp;</span><sup>87</sup><span>/Sr&nbsp;</span><sup>88</sup><span>&nbsp;for the entire batholith ranges from 0.705 to 0.710, comparable to ranges for the Sierra Nevada and British Columbia batholiths. Ore leads of the Butte district are isotopically very similar to feldspar leads of the host Butte Quartz Monzonite. This isotopic similarity was interpreted by Murthy and Patterson (1961a) to indicate complete mixing of independently derived feldspar lead and ore lead rather than close genetic relationship. However, detailed study of the only sample in the present investigation, from the Donald pluton, that clearly has mixed leads shows significant differences in lead isotopic composition between megacryst K-feldspar and both the groundmass K-feldspar and plagioclase, indicating that isotopic mixing of leads is not complete, even within a single hand specimen. Spatial relations of isotopic differences among the various plutons strongly suggest that complete mixing of leads of different isotopic composition from the magma did not occur in the Butte Quartz Monzonite nor in any other pluton of the batholith, and that the isotopic similarity between Butte ore and feldspar lead of the host rock indeed stems from a genetic association. Lead and strontium isotope ratios generally behave in a similar way; that is, the more radiogenic the lead in a rock, the more radiogenic the strontium. The source of the lead which could produce the isotope variations observed for the batholith is calculated to have a mean age of about 2,200 m.y., which is compatible with ages of Precambrian crystalline rocks in the region, and an isotopic makeup with U&nbsp;</span><sup>238</sup><span>/pb&nbsp;</span><sup>204</sup><span>&nbsp;&lt;9, Th/U &gt; 4, and Rb/Sr of 0.03-0.09. However, no large volumes of prebatholith rocks exposed in the Boulder batholith region are of the required isotopic composition, which is typical of basaltic-gabbroic or quartz dioritic chemical composition. Models involving complete melting of possible source materials to account for the isotope variations are considered and rejected. Mechanisms involving par.tial melting of lower crustal or upper mantle source material appear to be the most viable in explaining the observed isotopic compositions. Assimilation of upper crustal material (i.e., the Precambrian Belt and pre-Belt rocks, in which the lead and strontium are more radiogenic than in the batholith rocks) may have accompanied partial melting of the lower crust or upper mantle and indeed must have played a major role if the source material had a composition isotopically comparable to that observed for oceanic tholelites (i.e., low Th/U, U&nbsp;</span><sup>238</sup><span>/Pb&nbsp;</span><sup>204</sup><span>&nbsp;and Rb/Sr), but would be relatively unimportant if the source material were sufficiently radiogenic to begin with as might be expected from basalt, gabbro, or quartz diorite compositions 2,200 m.y. old. © 1968 Society of Economic Geologists, Inc.</span></p>","language":"English ","publisher":"Society of Economic Geologists ","doi":"10.2113/gsecongeo.63.8.884","issn":"03610128","usgsCitation":"Doe, B.R., Tilling, R., Hedge, C., and Klepper, M.R., 1968, Lead and strontium isotope studies of the Boulder Batholith, Southwestern Montana: Economic Geology, v. 63, no. 8, p. 884-906, https://doi.org/10.2113/gsecongeo.63.8.884.","productDescription":"23 p.","startPage":"884","endPage":"906","costCenters":[],"links":[{"id":369372,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States ","state":"Montana ","city":"Helena, Deer Lodge, Butte, Boulder ","otherGeospatial":"Boulder Batholith","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -112.01934814453125,\n              46.60982785835103\n            ],\n            [\n              -112.57827758789062,\n              46.5720787149159\n            ],\n            [\n              -112.72247314453124,\n              46.380096460287824\n            ],\n            [\n              -112.7197265625,\n              46.059891147620725\n            ],\n            [\n              -112.50274658203125,\n              46.01603873833416\n            ],\n            [\n              -112.36129760742188,\n              46.21785176740299\n            ],\n            [\n              -112.16903686523436,\n              46.308047059262954\n            ],\n            [\n              -112.02209472656249,\n              46.605110653248275\n            ],\n            [\n              -112.01934814453125,\n              46.60982785835103\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"63","issue":"8","noUsgsAuthors":false,"publicationDate":"1968-12-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Doe, B. R.","contributorId":52173,"corporation":false,"usgs":true,"family":"Doe","given":"B.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":775673,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Tilling, R.I. 0000-0003-4263-7221","orcid":"https://orcid.org/0000-0003-4263-7221","contributorId":98311,"corporation":false,"usgs":true,"family":"Tilling","given":"R.I.","affiliations":[],"preferred":false,"id":775674,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Hedge, C. E.","contributorId":73611,"corporation":false,"usgs":true,"family":"Hedge","given":"C. E.","affiliations":[],"preferred":false,"id":775675,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Klepper, M. R.","contributorId":64278,"corporation":false,"usgs":true,"family":"Klepper","given":"M.","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":775676,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70221423,"text":"70221423 - 1968 - Microcanonical ensembles of river nets","interactions":[],"lastModifiedDate":"2021-06-15T12:57:52.990625","indexId":"70221423","displayToPublicDate":"1968-12-01T07:54:33","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":5334,"text":"International Association of Scientific Hydrology - Bulletin ","onlineIssn":"2150-3435","printIssn":"0262-6667","active":false,"publicationSubtype":{"id":10}},"title":"Microcanonical ensembles of river nets","docAbstract":"<p><span>It is shown that a thermodynamic analogy can be set up for structurally cyclic as well as for noncyclic&nbsp;</span>river<span>&nbsp;</span>nets<span>&nbsp;that satisfy Horton's law of stream numbers. In the latter case, the&nbsp;</span>microcanonical<span>&nbsp;formalism of statistical thermodynamics has to be used.&nbsp;</span></p>","language":"English","publisher":"Taylor & Francis","doi":"10.1080/02626666809493629","usgsCitation":"Scheidegger, A.E., 1968, Microcanonical ensembles of river nets: International Association of Scientific Hydrology - Bulletin , v. 13, no. 4, p. 87-90, https://doi.org/10.1080/02626666809493629.","productDescription":"4 p.","startPage":"87","endPage":"90","costCenters":[],"links":[{"id":480332,"rank":0,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1080/02626666809493629","text":"Publisher Index Page"},{"id":386490,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"13","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Scheidegger, Adrian E.","contributorId":100370,"corporation":false,"usgs":true,"family":"Scheidegger","given":"Adrian","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":817672,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70221392,"text":"70221392 - 1968 - Estuaries and sounds of North Carolina","interactions":[],"lastModifiedDate":"2021-06-14T12:46:04.574286","indexId":"70221392","displayToPublicDate":"1968-12-01T07:42:01","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2126,"text":"JAWRA","active":true,"publicationSubtype":{"id":10}},"title":"Estuaries and sounds of North Carolina","docAbstract":"<p>No abstract available.&nbsp;</p>","language":"English","publisher":"Wiley","doi":"10.1111/j.1752-1688.1968.tb04857.x","usgsCitation":"Wilder, H.B., 1968, Estuaries and sounds of North Carolina: JAWRA, v. 4, no. 4, p. 28-38, https://doi.org/10.1111/j.1752-1688.1968.tb04857.x.","productDescription":"11 p.","startPage":"28","endPage":"38","costCenters":[],"links":[{"id":386463,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United  States","state":"North Carolina","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -75.7177734375,\n              36.66841891894786\n            ],\n            [\n              -81.650390625,\n              36.63316209558658\n            ],\n            [\n              -83.0126953125,\n              35.99578538642032\n            ],\n            [\n              -84.24316406249999,\n              35.10193405724606\n            ],\n            [\n              -80.7275390625,\n              35.137879119634185\n            ],\n            [\n              -80.5517578125,\n              34.813803317113155\n            ],\n            [\n              -79.453125,\n              34.77771580360469\n            ],\n            [\n              -78.57421875,\n              33.797408767572485\n            ],\n            [\n              -76.2451171875,\n              34.84987503195418\n            ],\n            [\n              -75.6298828125,\n              35.67514743608467\n            ],\n            [\n              -75.7177734375,\n              36.66841891894786\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"4","issue":"4","noUsgsAuthors":false,"publicationDate":"2007-06-08","publicationStatus":"PW","contributors":{"authors":[{"text":"Wilder, Hugh B.","contributorId":83899,"corporation":false,"usgs":true,"family":"Wilder","given":"Hugh","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":817498,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70206900,"text":"70206900 - 1968 - Composition of deeper subsurface waters along the Atlantic continental margin","interactions":[],"lastModifiedDate":"2020-12-04T18:53:02.943462","indexId":"70206900","displayToPublicDate":"1968-11-30T11:09:46","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3443,"text":"Southeastern Geology","active":true,"publicationSubtype":{"id":10}},"title":"Composition of deeper subsurface waters along the Atlantic continental margin","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"Department of Geology, Duke University","usgsCitation":"Manheim, F.T., and Horn, M.K., 1968, Composition of deeper subsurface waters along the Atlantic continental margin: Southeastern Geology, v. 9, no. 4, p. 215-236.","productDescription":"22 p.","startPage":"215","endPage":"236","costCenters":[{"id":678,"text":"Woods Hole Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":369642,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":380989,"rank":2,"type":{"id":15,"text":"Index Page"},"url":"https://southeasterngeology.org/archives/"}],"country":"United States","otherGeospatial":"Delaware, Florida, Georgia, Maryland,  New Jersey, New York, North Carolina, South Carolina, Virginia","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -85.341796875,\n              30.031055426540206\n            ],\n            [\n              -82.880859375,\n              24.886436490787712\n            ],\n            [\n              -81.5185546875,\n              24.16680208530324\n            ],\n            [\n              -79.5849609375,\n              25.085598897064752\n            ],\n            [\n              -79.716796875,\n              27.254629577800063\n            ],\n            [\n              -80.8154296875,\n              31.052933985705163\n            ],\n            [\n              -75.41015624999999,\n              35.31736632923788\n            ],\n            [\n              -75.5859375,\n              37.26530995561875\n            ],\n            [\n              -71.4990234375,\n              41.21172151054787\n            ],\n            [\n              -74.70703125,\n              41.244772343082076\n            ],\n            [\n              -77.5634765625,\n              39.027718840211605\n            ],\n            [\n              -77.2119140625,\n              36.94989178681327\n            ],\n            [\n              -79.716796875,\n              33.90689555128866\n            ],\n            [\n              -85.341796875,\n              30.031055426540206\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"9","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Manheim, Frank T. 0000-0003-4005-4524","orcid":"https://orcid.org/0000-0003-4005-4524","contributorId":20770,"corporation":false,"usgs":true,"family":"Manheim","given":"Frank","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":776190,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Horn, M. K.","contributorId":220915,"corporation":false,"usgs":false,"family":"Horn","given":"M.","email":"","middleInitial":"K.","affiliations":[],"preferred":false,"id":776191,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011485,"text":"70011485 - 1968 - Uranium disequilibrium in groundwater: An isotope dilution approach in hydrologic investigations","interactions":[],"lastModifiedDate":"2026-02-05T20:00:55.988607","indexId":"70011485","displayToPublicDate":"1968-11-29T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Uranium disequilibrium in groundwater: An isotope dilution approach in hydrologic investigations","docAbstract":"<p><span id=\"_mce_caret\" data-mce-bogus=\"1\" data-mce-type=\"format-caret\"><span>The distribution and environmental disequilibrium patterns of naturally occurring uranium isotopes (U</span><sup>234</sup><span>&nbsp;and U</span><sup>238</sup><span>) in waters of the Floridan aquifer suggest that variations in the ratios of isotopic activity and concentrations can be used quantitatively to evaluate mixing proportions of waters from differing sources. Uranium is probably unique in its potential for this approach, which seems to have general usefulness in hydrologic investigations.</span></span></p>","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.162.3857.997","issn":"00368075","usgsCitation":"Osmond, J., Rydell, H., and Kaufman, M.I., 1968, Uranium disequilibrium in groundwater: An isotope dilution approach in hydrologic investigations: Science, v. 162, no. 3857, p. 997-999, https://doi.org/10.1126/science.162.3857.997.","productDescription":"3 p.","startPage":"997","endPage":"999","costCenters":[],"links":[{"id":220907,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Florida","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -87.75892866886728,\n              31.143268810573844\n            ],\n            [\n              -87.62303351734478,\n              30.238600918743856\n            ],\n            [\n              -83.81354821489576,\n              29.00906335007337\n            ],\n            [\n              -82.3323690353631,\n              24.615788803974226\n            ],\n            [\n              -79.6864857441564,\n              24.55462324894998\n            ],\n            [\n              -80.03387638676382,\n              27.87855451506119\n            ],\n            [\n              -81.46928356514647,\n              30.78587593625049\n            ],\n            [\n              -87.75892866886728,\n              31.143268810573844\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"162","issue":"3857","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505bbda6e4b08c986b32914c","contributors":{"authors":[{"text":"Osmond, J.K.","contributorId":78467,"corporation":false,"usgs":true,"family":"Osmond","given":"J.K.","email":"","affiliations":[],"preferred":false,"id":361227,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rydell, H.S.","contributorId":48704,"corporation":false,"usgs":true,"family":"Rydell","given":"H.S.","email":"","affiliations":[],"preferred":false,"id":361225,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Kaufman, M. I.","contributorId":66847,"corporation":false,"usgs":true,"family":"Kaufman","given":"M.","email":"","middleInitial":"I.","affiliations":[],"preferred":false,"id":361226,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70171538,"text":"70171538 - 1968 - Use of dye tracers to collect hydrologic data in Oregon","interactions":[],"lastModifiedDate":"2021-06-14T12:30:37.551585","indexId":"70171538","displayToPublicDate":"1968-11-27T18:30:00","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3718,"text":"Water Resources Bulletin","printIssn":"0043-1370","active":true,"publicationSubtype":{"id":10}},"title":"Use of dye tracers to collect hydrologic data in Oregon","docAbstract":"<p><span class=\"EXLDetailsDisplayVal\"><span class=\"searchword\">Dye</span>&nbsp;<span class=\"searchword\">tracers</span>&nbsp;have been used in&nbsp;<span class=\"searchword\">Oregon</span>&nbsp;in the Collection of&nbsp;<span class=\"searchword\">hydrologic</span>&nbsp;<span class=\"searchword\">data</span>&nbsp;on 2,350 miles of stream channels in the Long Tom, Umpqua, Willmette, and John Day River basins, and in the Carmen‐Smith power tunnel. These investigations demonstrated the usefulness, of&nbsp;<span class=\"searchword\">dye</span>&nbsp;<span class=\"searchword\">tracers</span>&nbsp;for determining: (1) estimates of traveltimes and travel rates of water, (2) discharge where standard methods of measuring are not applicable, and (3) dispersion characteristics of streams. Illustrations are used to present the results of time‐of‐travel studies in simple, concise, and readily interpreted form.</span><span>&nbsp;</span></p>","language":"English","publisher":"Wiley","doi":"10.1111/j.1752-1688.1968.tb02937.x","issn":"1093-474X","usgsCitation":"Harris, D., and Sanderson, R., 1968, Use of dye tracers to collect hydrologic data in Oregon: Water Resources Bulletin, v. 4, no. 2, p. 51-68, https://doi.org/10.1111/j.1752-1688.1968.tb02937.x.","productDescription":"18 p.","startPage":"51","endPage":"68","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":518,"text":"Oregon Water Science Center","active":true,"usgs":true}],"links":[{"id":322096,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United  States","state":"Oregon","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -116.93847656250001,\n              46.13417004624326\n            ],\n            [\n              -122.6953125,\n              45.583289756006316\n            ],\n            [\n              -123.00292968749999,\n              46.13417004624326\n            ],\n            [\n              -124.0576171875,\n              46.31658418182218\n            ],\n            [\n              -124.45312499999999,\n              42.84375132629021\n            ],\n            [\n              -124.45312499999999,\n              42.032974332441405\n            ],\n            [\n              -117.02636718749999,\n              42.00032514831621\n            ],\n            [\n              -116.89453125,\n              44.15068115978094\n            ],\n            [\n              -117.24609374999999,\n              44.33956524809713\n            ],\n            [\n              -116.4111328125,\n              45.67548217560647\n            ],\n            [\n              -116.93847656250001,\n              46.13417004624326\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"4","issue":"2","noUsgsAuthors":false,"publicationDate":"2007-06-08","publicationStatus":"PW","scienceBaseUri":"575158bde4b053f0edd03ca2","contributors":{"authors":[{"text":"Harris, D.D.","contributorId":59002,"corporation":false,"usgs":true,"family":"Harris","given":"D.D.","email":"","affiliations":[],"preferred":false,"id":631698,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Sanderson, R.B.","contributorId":169982,"corporation":false,"usgs":false,"family":"Sanderson","given":"R.B.","email":"","affiliations":[],"preferred":false,"id":631699,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70119520,"text":"70119520 - 1968 - Two bighorn sheep-coyote encounters","interactions":[],"lastModifiedDate":"2025-03-07T17:14:18.761387","indexId":"70119520","displayToPublicDate":"1968-11-26T09:33:32","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2373,"text":"Journal of Mammalogy","onlineIssn":"1545-1542","printIssn":"0022-2372","active":true,"publicationSubtype":{"id":10}},"title":"Two bighorn sheep-coyote encounters","docAbstract":"No abstract available.","language":"English","publisher":"Oxford Academic","doi":"10.2307/1378747","usgsCitation":"Woolf, A.D., and O’Shea, T.J., 1968, Two bighorn sheep-coyote encounters: Journal of Mammalogy, v. 49, no. 4, p. 770-770, https://doi.org/10.2307/1378747.","productDescription":"1 p.","startPage":"770","endPage":"770","costCenters":[],"links":[{"id":291807,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Wyoming","otherGeospatial":"Yellowstone National Park","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -111.03932499485195,\n              44.81690121712981\n            ],\n            [\n              -111.03932499485195,\n              44.23979703931795\n            ],\n            [\n              -110.15320168864254,\n              44.23979703931795\n            ],\n            [\n              -110.15320168864254,\n              44.81690121712981\n            ],\n            [\n              -111.03932499485195,\n              44.81690121712981\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"49","issue":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53e492d1e4b0fff40428a623","contributors":{"authors":[{"text":"Woolf, Alan D.","contributorId":184189,"corporation":false,"usgs":false,"family":"Woolf","given":"Alan","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":930118,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"O’Shea, Tom J.","contributorId":13553,"corporation":false,"usgs":true,"family":"O’Shea","given":"Tom","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":497688,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011593,"text":"70011593 - 1968 - Herpetic keratoconjunctivitis: Therapy with synthetic double-stranded RNA","interactions":[],"lastModifiedDate":"2026-02-05T20:07:53.373049","indexId":"70011593","displayToPublicDate":"1968-11-15T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Herpetic keratoconjunctivitis: Therapy with synthetic double-stranded RNA","docAbstract":"<p><span id=\"_mce_caret\" data-mce-bogus=\"1\" data-mce-type=\"format-caret\"><span>A study was undertaken in rabbits to determine how late in the course of keratoconjunctivitis caused by herpes simplex recovery could be effected by an inducer of interferon. Interferon was induced by means of synthetic double-stranded RNA copolymer formed with polynosinic acid: polycytidilic acid RNA. Therapy promotes recovery from severe and fully established keratoconjunctivitis for which treatment was begun as late as 3 days after virus inoculation. No drug toxicity was observed in the therapeutic dose range. These findings further support the proposed role of the interferon mechanism in the natural recovery of already established viral infection. They also suggest the usefulness of interferon inducers in viral infections of man.</span></span></p>","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.162.3855.811","issn":"00368075","usgsCitation":"Park, J., and Baron, S., 1968, Herpetic keratoconjunctivitis: Therapy with synthetic double-stranded RNA: Science, v. 162, no. 3855, p. 811-813, https://doi.org/10.1126/science.162.3855.811.","productDescription":"3 p.","startPage":"811","endPage":"813","costCenters":[],"links":[{"id":221678,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"162","issue":"3855","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a3080e4b0c8380cd5d6cd","contributors":{"authors":[{"text":"Park, J.H.","contributorId":17370,"corporation":false,"usgs":true,"family":"Park","given":"J.H.","email":"","affiliations":[],"preferred":false,"id":361489,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Baron, S.","contributorId":16978,"corporation":false,"usgs":true,"family":"Baron","given":"S.","email":"","affiliations":[],"preferred":false,"id":361488,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70011486,"text":"70011486 - 1968 - Environmental geochemistry: Health and disease","interactions":[],"lastModifiedDate":"2026-02-05T20:13:21.489897","indexId":"70011486","displayToPublicDate":"1968-11-15T00:00:00","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Environmental geochemistry: Health and disease","docAbstract":"<p>No abstract available.</p>","language":"English","publisher":"American Association for the Advancement of Science","doi":"10.1126/science.162.3855.815","issn":"00368075","usgsCitation":"Cannon, H., and Hopps, H., 1968, Environmental geochemistry: Health and disease: Science, v. 162, no. 3855, p. 815-817, https://doi.org/10.1126/science.162.3855.815.","productDescription":"3 p.","startPage":"815","endPage":"817","costCenters":[],"links":[{"id":220908,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"162","issue":"3855","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a09c7e4b0c8380cd52071","contributors":{"authors":[{"text":"Cannon, H.L.","contributorId":43416,"corporation":false,"usgs":true,"family":"Cannon","given":"H.L.","email":"","affiliations":[],"preferred":false,"id":361228,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hopps, H.C.","contributorId":103412,"corporation":false,"usgs":true,"family":"Hopps","given":"H.C.","affiliations":[],"preferred":false,"id":361229,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70209019,"text":"70209019 - 1968 - Uranium deposits in the Jackpile Sandstone, New Mexico","interactions":[],"lastModifiedDate":"2020-03-11T17:39:00","indexId":"70209019","displayToPublicDate":"1968-11-01T17:30:54","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Uranium deposits in the Jackpile Sandstone, New Mexico","docAbstract":"<p><span>Ultimate sources of uranium are believed to be either fluids from Morrison volcanoes (not demonstrable) or labile constituents in the Jackpile Sandstone. Petrographic studies indicate considerable pre-Dakota diagenesis, which would have made uranium in feldspars, heavy minerals, and volcanic debris available. Deposition of uranium occurred while host sandstone was near the surface during the pre-Dakota hiatus. Sedimentary permeability was the principal factor in distribution of ore and of the organic decomposition products that precipitated it.</span></p>","language":"English","publisher":"Society of Economic Geologists","doi":"10.2113/gsecongeo.63.7.737","usgsCitation":"Nash, J.T., 1968, Uranium deposits in the Jackpile Sandstone, New Mexico: Economic Geology, v. 63, no. 7, p. 737-750, https://doi.org/10.2113/gsecongeo.63.7.737.","productDescription":"14 p.","startPage":"737","endPage":"750","costCenters":[],"links":[{"id":373140,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"New Mexico ","otherGeospatial":"Jackpile Sandstone","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -108.18511962890624,\n              34.94899072578227\n            ],\n            [\n              -106.64154052734374,\n              34.94899072578227\n            ],\n            [\n              -106.64154052734374,\n              35.97800618085566\n            ],\n            [\n              -108.18511962890624,\n              35.97800618085566\n            ],\n            [\n              -108.18511962890624,\n              34.94899072578227\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"63","issue":"7","noUsgsAuthors":false,"publicationDate":"1968-11-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Nash, J. Thomas","contributorId":26306,"corporation":false,"usgs":true,"family":"Nash","given":"J.","email":"","middleInitial":"Thomas","affiliations":[],"preferred":false,"id":784560,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70221374,"text":"70221374 - 1968 - Electric‐analog and digital‐computer model analysis of stream depletion by wells","interactions":[],"lastModifiedDate":"2021-06-11T17:06:43.201817","indexId":"70221374","displayToPublicDate":"1968-11-01T12:03:21","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3825,"text":"Groundwater","active":true,"publicationSubtype":{"id":10}},"title":"Electric‐analog and digital‐computer model analysis of stream depletion by wells","docAbstract":"<p>Electric<span>‐</span>analog<span>&nbsp;or&nbsp;</span>digital<span>‐</span>computer<span>&nbsp;models are used to compute the effect of ground‐water withdrawal or recharge on streamflow. The results can be generalized on a map showing lines of equal elapsed time. The lines indicate the time of recharging or discharging that is needed to affect the streamflow by a given fraction of the amount pumped or injected. The generalization is based on the similarity in shape of the relations between pumping time and&nbsp;</span>stream<span>&nbsp;</span>depletion<span>&nbsp;for (1) semi‐infinite homogeneous aquifers drained by a straight, fully penetrating&nbsp;</span>stream<span>, and (2) complex heterogeneous aquifers. Response curves from a&nbsp;</span>model<span>&nbsp;reflect the combined effect of&nbsp;</span>stream<span>&nbsp;sinuosity, irregular impermeable boundaries, areal variation in aquifer properties, and imperfect hydraulic connection between the&nbsp;</span>stream<span>&nbsp;and aquifer. The elapsed‐cime lines are identified by sdf (</span>stream<span>&nbsp;</span>depletion<span>&nbsp;factor) values. These values can be calculated from observations made on an&nbsp;</span>electric<span>‐</span>analog<span>&nbsp;</span>model<span>&nbsp;and then may be used in a&nbsp;</span>digital<span>‐</span>computer<span>&nbsp;program for determining the effects of ground‐water pumping or recharge on streamflow.</span></p>","language":"English","publisher":"NGWA The Groundwater Association","doi":"10.1111/j.1745-6584.1968.tb01258.x","usgsCitation":"Jenkins, C., 1968, Electric‐analog and digital‐computer model analysis of stream depletion by wells: Groundwater, v. 6, no. 6, p. 27-34, https://doi.org/10.1111/j.1745-6584.1968.tb01258.x.","productDescription":"8 p.","startPage":"27","endPage":"34","costCenters":[],"links":[{"id":386437,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"6","issue":"6","noUsgsAuthors":false,"publicationDate":"2006-07-06","publicationStatus":"PW","contributors":{"authors":[{"text":"Jenkins, C.T.","contributorId":106099,"corporation":false,"usgs":true,"family":"Jenkins","given":"C.T.","email":"","affiliations":[],"preferred":false,"id":817450,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70221365,"text":"70221365 - 1968 - Experimental evidence that fluid inclusions do not leak","interactions":[],"lastModifiedDate":"2021-06-11T15:24:43.130166","indexId":"70221365","displayToPublicDate":"1968-11-01T10:13:30","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"Experimental evidence that fluid inclusions do not leak","docAbstract":"<p><span>The possibility of leakage of fluids into or out of&nbsp;</span>fluid<span>&nbsp;</span>inclusions<span>&nbsp;subjected to large pressure gradients has always been considered a serious problem in the interpretation of&nbsp;</span>inclusion<span>&nbsp;data. As previous&nbsp;</span>experimental<span>&nbsp;</span>evidence<span>&nbsp;on leakage was contradictory, new experiments were performed.&nbsp;</span>Inclusion<span>&nbsp;vapor bubble diameters in twelve quartz crystals (≤ 3 mm; 8 localities),&nbsp;</span>not<span>&nbsp;sawn, ground or polished, were measured. The samples were run at Pa-.o,-4,000 bars, at T u 100°-410° C, for ≤ 17 days total, and remeasured after each run. Similar experiments at ≤ 155° C were made on sphalerite and calcite. Most&nbsp;</span>inclusions<span>&nbsp;in most samples (even those only 5am under the surface in quartz) showed no change in bubble diameter, hence no leakage. A few exceptions, mainly among&nbsp;</span>inclusions<span>&nbsp;homogenizing at T « Tru, had P&nbsp;</span><sub>internal</sub><span>&nbsp;» P&nbsp;</span><sub>internal</sub><span>, hence they ruptured and lost liquid during the 410° C run. From this work and a review of the literature, we conclude that most&nbsp;</span>inclusions<span>&nbsp;have&nbsp;</span>not<span>&nbsp;suffered major leakage. Some previous experiments indicating leakage may be explained by microfractures introduced during sample preparation. The present work does&nbsp;</span>not<span>, however, preclude the possibility of diffusion of small but chemically significant amounts of substances such as hydrogen in or out of&nbsp;</span>inclusions<span>.</span></p>","language":"English","publisher":"Society of Economic Geologists","doi":"10.2113/gsecongeo.63.7.715","usgsCitation":"Roedder, E., and Skinner, B.J., 1968, Experimental evidence that fluid inclusions do not leak: Economic Geology, v. 63, no. 7, p. 715-730, https://doi.org/10.2113/gsecongeo.63.7.715.","productDescription":"16 p.","startPage":"715","endPage":"730","costCenters":[],"links":[{"id":386428,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"63","issue":"7","noUsgsAuthors":false,"publicationDate":"1968-11-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Roedder, E.","contributorId":100986,"corporation":false,"usgs":true,"family":"Roedder","given":"E.","affiliations":[],"preferred":false,"id":817434,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Skinner, B. J.","contributorId":64867,"corporation":false,"usgs":true,"family":"Skinner","given":"B.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":817435,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70221364,"text":"70221364 - 1968 - A lead isotope study of galenas and selected feldspars from mining Districts in Utah","interactions":[],"lastModifiedDate":"2021-06-11T15:12:05.825137","indexId":"70221364","displayToPublicDate":"1968-11-01T10:07:55","publicationYear":"1968","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1472,"text":"Economic Geology","active":true,"publicationSubtype":{"id":10}},"title":"A lead isotope study of galenas and selected feldspars from mining Districts in Utah","docAbstract":"<p><span>The leads&nbsp;</span>in<span>&nbsp;</span>feldspars<span>&nbsp;from the main Tertiary intrusive bodies&nbsp;</span>in<span>&nbsp;each of three&nbsp;</span>mining<span>&nbsp;regions&nbsp;</span>in<span>&nbsp;</span>Utah<span>&nbsp;are isotopically similar to the&nbsp;</span>lead<span>&nbsp;deposits immediately associated with them. These deposits are the largest and also the least radiogenic&nbsp;</span>in<span>&nbsp;each region, whereas the smaller deposits are more radiogenic. Throughout each region the 'ore leads appear to be mixtures&nbsp;</span>in<span>&nbsp;various proportions of&nbsp;</span>lead<span>&nbsp;derived from the intrusive magma and&nbsp;</span>a<span>&nbsp;radiogenic&nbsp;</span>lead<span>&nbsp;component derived from the upper crustal rocks through which the mineralizing fluids passed. Linear relationships are exhibited between the&nbsp;</span>lead<span>&nbsp;</span>isotope<span>&nbsp;ratios within each&nbsp;</span>mining<span>&nbsp;region, and these enable the ages of the upper crustal basement rocks to be determined.&nbsp;</span>A<span>&nbsp;simple tvo-stage model theory for the development of the&nbsp;</span>lead<span>&nbsp;ores yields the folloving data: Oquirrh Mountains region, t 1,650 4-150 m.y., p-Cottonwood-Park City region, t = 2,415 4-30 m.y., p- = 8.87. Tintlc region, t 2,075 4-30 m.y., Milford region, t 1 765 4-70 m.y., p-T ( Us ) = , = 8.83. An alternative \"mixing\" model is also proposed which requires only 1,650-m.y. and 2,400-m.y. events&nbsp;</span>in<span>&nbsp;these regions.&nbsp;</span>In<span>&nbsp;either case these ages confirm and supplement our present geochronological knowledge of the basement rocks of&nbsp;</span>Utah<span>.&nbsp;</span></p>","language":"English","publisher":"Society of Economic Geologists","doi":"10.2113/gsecongeo.63.7.796","usgsCitation":"Stacey, J.S., Zartman, R., and Nkomo, I.T., 1968, A lead isotope study of galenas and selected feldspars from mining Districts in Utah: Economic Geology, v. 63, no. 7, p. 796-814, https://doi.org/10.2113/gsecongeo.63.7.796.","productDescription":"19 p.","startPage":"796","endPage":"814","costCenters":[],"links":[{"id":386427,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United  States","state":"Utah","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -111.0498046875,\n              42.049292638686836\n            ],\n            [\n              -114.08203125,\n              42.049292638686836\n            ],\n            [\n              -114.08203125,\n              37.020098201368114\n            ],\n            [\n              -109.00634765625,\n              37.00255267215955\n            ],\n            [\n              -109.0283203125,\n              41.04621681452063\n            ],\n            [\n              -111.09374999999999,\n              41.07935114946899\n            ],\n            [\n              -111.0498046875,\n              42.049292638686836\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"63","issue":"7","noUsgsAuthors":false,"publicationDate":"1968-11-01","publicationStatus":"PW","contributors":{"authors":[{"text":"Stacey, J. S.","contributorId":72785,"corporation":false,"usgs":true,"family":"Stacey","given":"J.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":817431,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Zartman, R. E.","contributorId":15632,"corporation":false,"usgs":true,"family":"Zartman","given":"R. E.","affiliations":[],"preferred":false,"id":817432,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Nkomo, Ignatius T.","contributorId":61044,"corporation":false,"usgs":true,"family":"Nkomo","given":"Ignatius","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":817433,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70175860,"text":"70175860 - 1968 - Field test results of the Model B panametrics radioisotope gage for monitoring suspended-sediment concentration in rivers and streams","interactions":[],"lastModifiedDate":"2018-04-02T10:40:24","indexId":"70175860","displayToPublicDate":"1968-10-29T13:45:00","publicationYear":"1968","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":1,"text":"Federal Government Series"},"title":"Field test results of the Model B panametrics radioisotope gage for monitoring suspended-sediment concentration in rivers and streams","docAbstract":"<p>No abstract available</p>","language":"English","publisher":"Federal Inter-Agency Sedimentation Project","usgsCitation":"Skinner, J.V., 1968, Field test results of the Model B panametrics radioisotope gage for monitoring suspended-sediment concentration in rivers and streams, 37 p.","productDescription":"37 p.","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":392,"text":"Minnesota Water Science Center","active":true,"usgs":true}],"links":[{"id":327044,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"57b82db6e4b03fd6b7da36a5","contributors":{"authors":[{"text":"Skinner, J. V.","contributorId":32504,"corporation":false,"usgs":true,"family":"Skinner","given":"J.","email":"","middleInitial":"V.","affiliations":[],"preferred":false,"id":646459,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
]}