{"pageNumber":"1558","pageRowStart":"38925","pageSize":"25","recordCount":41062,"records":[{"id":32561,"text":"pp1170C - 1980 - Seismic properties investigation of the Springer Ranch landslide, Powder River basin, Wyoming","interactions":[],"lastModifiedDate":"2012-02-02T00:09:23","indexId":"pp1170C","displayToPublicDate":"1994-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":331,"text":"Professional Paper","code":"PP","onlineIssn":"2330-7102","printIssn":"1044-9612","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"1170","chapter":"C","title":"Seismic properties investigation of the Springer Ranch landslide, Powder River basin, Wyoming","docAbstract":"A recent and rapid increase since the mid-1970's in commercial and residential development in the Powder River Basin, Wyoming and Montana, is caused by exploitation of vast coal and other resources in the basin. One geologic hazard to such development is landsliding. A landslide sufficiently representative of others in the area was chosen for detailed seismic studies. Studies of this landslide show that a low-velocity layer overlies a high-velocity layer both on the slide and away from it and that the contact between the volocity layers is nearly parallel with the preslide topographic surface. Computed shear and other elastic moduli of the low-velocity layer are about one-tenth those of the high-velocity layer. When failure occurs within the slope materials, it will very likely be confined to the low-velocity layer. The number and position of main shear planes in the landslide are unknown, but the main slippage surface is probably near the contact between the low- and high-velocity layers. The main cause of landslide failure in the study area is apparently the addition of moisture to the low-velocity layer.","language":"ENGLISH","doi":"10.3133/pp1170C","usgsCitation":"Miller, C., Ramirez, A., and Bullard, T., 1980, Seismic properties investigation of the Springer Ranch landslide, Powder River basin, Wyoming: U.S. Geological Survey Professional Paper 1170, 7 p., https://doi.org/10.3133/pp1170C.","productDescription":"7 p.","costCenters":[],"links":[{"id":119204,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/pp/1170c/report-thumb.jpg"},{"id":60388,"rank":300,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/pp/1170c/report.pdf","linkFileType":{"id":1,"text":"pdf"}}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"4f4e49f6e4b07f02db5f1921","contributors":{"authors":[{"text":"Miller, C.H.","contributorId":19148,"corporation":false,"usgs":true,"family":"Miller","given":"C.H.","email":"","affiliations":[],"preferred":false,"id":208679,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Ramirez, A.L.","contributorId":14474,"corporation":false,"usgs":true,"family":"Ramirez","given":"A.L.","email":"","affiliations":[],"preferred":false,"id":208678,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Bullard, T.G.","contributorId":11262,"corporation":false,"usgs":true,"family":"Bullard","given":"T.G.","email":"","affiliations":[],"preferred":false,"id":208677,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70156300,"text":"70156300 - 1980 - Trends in the distribution of recent foraminifera in San Francisco Bay","interactions":[],"lastModifiedDate":"2016-07-26T15:27:55","indexId":"70156300","displayToPublicDate":"1990-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3913,"text":"Cushman Foundation Special Publication","active":true,"publicationSubtype":{"id":10}},"title":"Trends in the distribution of recent foraminifera in San Francisco Bay","docAbstract":"<p>Much of the bathymetry of the southern part of San Francisco Bay reflects the drainage pattern of late Pleistocene streams. Holocene estuarine silt and clay cover most of the bay floor; relict eolian and deltaic sand occurs along the eastern shore; sandy patches are present in the main channel owing to higher tidal current velocities. Organic content is high along the western shore, where tidal flats are extensive, and in the slough at the mouth of Coyote Creek where wastewaters discharge.</p>\n<p>Thirty-one species of benthonic foraminifera were identified in surficial sediments of San Francisco Bay estuary; of these, 20 species were stained red by rose Bengal and are considered as live. Water depth, sediment textural characteristics, salinity, organic matter, sediment pH, and biological competition were considered as factors that might affect distribution of foraminifera. Four ecologic zones based on observed trends in the distribution and abundance of several species correlate well with some environmental factors. Four groups based on the Q-mode analysis of frequency counts of foraminiferal assemblages are reasonably similar to the four ecologic zones. These zones, showing restricted depth ranges, are: Inner Coastal Zone, where Elphidium incertum obscurum and Trochammina infiata are prominent; Outer Coastal Zone, dominated by Ammonia beccarii tepida and Elphidium incatum; Deep Bay Zone, where Elphidietla hannai, Elphidium incertum clavatum, Hopkinsina pacifica, and Bolivina spp. appear in abundance; and Deep Channel Zone, where Elphidiella hannai is most abundant. In the Inner Coastal Zone, salinity due to large fluctuations is a limiting factor for many species. Substrate textural characteristics are primary determinants of the distribution of agglutinated foraminifers. The percentage of organic matter in the sediment correlates well with the abundance of Elphidium incertum obscurum, a ubiquitous species in San Francisco Bay. Sediment pH is not critical. Biologic competition can be estimated by comparing the percentage of a species with the number of species present in the assemblage, as shown for Ammonia beccarii tepida and Elphidiella hannai.</p>","publisher":"Cushman Foundation","usgsCitation":"Arnal, R., Quinterno, P., Conomos, T.J., and Gram, R., 1980, Trends in the distribution of recent foraminifera in San Francisco Bay: Cushman Foundation Special Publication, v. 19, p. 17-39.","productDescription":"23 p.","startPage":"17","endPage":"39","numberOfPages":"287","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":552,"text":"San Francisco Bay-Delta","active":false,"usgs":true},{"id":5079,"text":"Pacific Regional Director's Office","active":true,"usgs":true}],"links":[{"id":308179,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":306918,"rank":1,"type":{"id":15,"text":"Index Page"},"url":"https://www.cushmanfoundation.org/specpubs/index.html"}],"country":"United States","state":"California","city":"San Francisco","otherGeospatial":"San Francisco Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -121.9207763671875,\n              37.42688834526727\n            ],\n            [\n              -122.05673217773438,\n              37.41925395973696\n            ],\n            [\n              -122.12127685546875,\n              37.438883664067525\n            ],\n            [\n              -122.15286254882812,\n              37.489025074767866\n            ],\n            [\n              -122.27508544921875,\n              37.54784381205082\n            ],\n            [\n              -122.39593505859376,\n              37.604440246103614\n            ],\n            [\n              -122.43850708007811,\n              37.71750400999666\n            ],\n            [\n              -122.43713378906249,\n              37.792422407988575\n            ],\n            [\n              -122.19818115234375,\n              37.783740105227224\n            ],\n            [\n              -122.14736938476562,\n              37.67512527892127\n            ],\n            [\n              -122.05673217773438,\n              37.57397058830708\n            ],\n            [\n              -121.9317626953125,\n              37.48684571271661\n            ],\n            [\n              -121.9207763671875,\n              37.42688834526727\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"19","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"55fa92d6e4b05d6c4e501ae1","contributors":{"authors":[{"text":"Arnal, R.E.","contributorId":75141,"corporation":false,"usgs":true,"family":"Arnal","given":"R.E.","email":"","affiliations":[],"preferred":false,"id":568558,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Quinterno, P. J.","contributorId":65465,"corporation":false,"usgs":true,"family":"Quinterno","given":"P. J.","affiliations":[],"preferred":false,"id":568559,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Conomos, T. J.","contributorId":77515,"corporation":false,"usgs":true,"family":"Conomos","given":"T.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":568560,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Gram, Ralph","contributorId":146641,"corporation":false,"usgs":false,"family":"Gram","given":"Ralph","email":"","affiliations":[],"preferred":false,"id":568561,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70209244,"text":"70209244 - 1980 - Coastal ocean dynamics","interactions":[],"lastModifiedDate":"2020-03-25T11:56:07","indexId":"70209244","displayToPublicDate":"1983-03-25T11:45:23","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1578,"text":"Eos, Transactions, American Geophysical Union","onlineIssn":"2324-9250","printIssn":"0096-394","active":true,"publicationSubtype":{"id":10}},"title":"Coastal ocean dynamics","docAbstract":"<p>The main objective of the Coastal Ocean Dynamics Experiment (CODE) is to observe and describe the response of continental shelf waters to strong atmospheric forcing in a relatively simple geomorphological setting. In order to achieve this goal, CODE has been designed (1) to define the different space and time scales of the physical parameters important to the shelf flow field and (2) to identify and describe the essential kinematical and dynamical processes governing wind‐driven circulation on the continental shelf.</p><p>A variety of models exist for the wind‐forced response of continental shelf waters. The salient differences among these models lies in the assumed balances between terms in the governing equations. For example,<span>&nbsp;</span><i>Gill and Schumann</i><span>&nbsp;</span>[1974] in a barotropic model assume a geostrophic cross‐shelf momentum balance but include the time‐dependent and surface and bottom stress terms in the along‐shelf momentum balance.<span>&nbsp;</span><i>Csanady</i><span>&nbsp;</span>[1978] in his arrested topographic wave model involving bottom friction assumes a quasisteady alongshelf response neglecting advective terms and retaining the geostrophic cross‐shelf balance. Various shelf wave models assume inviscid dynamics and other models assume a simple balance between surface and bottom stress in shallow water. To test the different assumptions behind these models, all terms in the governing equations need to be accurately estimated.</p>","language":"English","publisher":"Wiley","doi":"10.1029/EO064i036p00538","usgsCitation":"Allen, J., Beardsley, R., Brown, W., Cacchione, D., Davis, R., Friehe, C., Grant, W., Huyer, A., Irish, J., Janopaul, M., Williams, A., and Winant, C.D., 1980, Coastal ocean dynamics: Eos, Transactions, American Geophysical Union, v. 64, no. 36, p. 538-540, https://doi.org/10.1029/EO064i036p00538.","productDescription":"3 p.","startPage":"538","endPage":"540","costCenters":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"links":[{"id":373512,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"California","otherGeospatial":"CODE 1","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -124.07958984375001,\n              38.54816542304656\n            ],\n            [\n              -122.67333984374999,\n              38.54816542304656\n            ],\n            [\n              -122.67333984374999,\n              39.791654835253425\n            ],\n            [\n              -124.07958984375001,\n              39.791654835253425\n            ],\n            [\n              -124.07958984375001,\n              38.54816542304656\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"64","issue":"36","noUsgsAuthors":false,"publicationDate":"2011-06-03","publicationStatus":"PW","contributors":{"authors":[{"text":"Allen, J.","contributorId":92632,"corporation":false,"usgs":true,"family":"Allen","given":"J.","affiliations":[],"preferred":false,"id":785527,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Beardsley, R.","contributorId":73400,"corporation":false,"usgs":true,"family":"Beardsley","given":"R.","affiliations":[],"preferred":false,"id":785528,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Brown, W.","contributorId":223590,"corporation":false,"usgs":false,"family":"Brown","given":"W.","affiliations":[],"preferred":false,"id":785529,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Cacchione, D.A.","contributorId":65448,"corporation":false,"usgs":true,"family":"Cacchione","given":"D.A.","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":785530,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Davis, R.","contributorId":92926,"corporation":false,"usgs":true,"family":"Davis","given":"R.","affiliations":[],"preferred":false,"id":785531,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Friehe, C.","contributorId":223591,"corporation":false,"usgs":false,"family":"Friehe","given":"C.","email":"","affiliations":[],"preferred":false,"id":785532,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Grant, W.","contributorId":223592,"corporation":false,"usgs":false,"family":"Grant","given":"W.","affiliations":[],"preferred":false,"id":785533,"contributorType":{"id":1,"text":"Authors"},"rank":7},{"text":"Huyer, Adriana","contributorId":202468,"corporation":false,"usgs":false,"family":"Huyer","given":"Adriana","email":"","affiliations":[],"preferred":false,"id":785534,"contributorType":{"id":1,"text":"Authors"},"rank":8},{"text":"Irish, J.","contributorId":92450,"corporation":false,"usgs":true,"family":"Irish","given":"J.","email":"","affiliations":[],"preferred":false,"id":785535,"contributorType":{"id":1,"text":"Authors"},"rank":9},{"text":"Janopaul, M.","contributorId":223593,"corporation":false,"usgs":false,"family":"Janopaul","given":"M.","email":"","affiliations":[],"preferred":false,"id":785536,"contributorType":{"id":1,"text":"Authors"},"rank":10},{"text":"Williams, A.","contributorId":36463,"corporation":false,"usgs":true,"family":"Williams","given":"A.","affiliations":[],"preferred":false,"id":785537,"contributorType":{"id":1,"text":"Authors"},"rank":11},{"text":"Winant, Clinton D.","contributorId":202471,"corporation":false,"usgs":false,"family":"Winant","given":"Clinton","email":"","middleInitial":"D.","affiliations":[],"preferred":false,"id":785538,"contributorType":{"id":1,"text":"Authors"},"rank":12}]}}
,{"id":70230851,"text":"pp1124F - 1980 - Palladium, platinum, and rhodium concentrations in mafic and ultramafic rocks from the Zhob Valley and Dargai complexes, Pakistan","interactions":[],"lastModifiedDate":"2022-04-26T13:50:34.007151","indexId":"pp1124F","displayToPublicDate":"1980-12-31T08:39:43","publicationYear":"1980","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":331,"text":"Professional Paper","code":"PP","onlineIssn":"2330-7102","printIssn":"1044-9612","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"1124","chapter":"F","title":"Palladium, platinum, and rhodium concentrations in mafic and ultramafic rocks from the Zhob Valley and Dargai complexes, Pakistan","docAbstract":"<p>The Zhob Valley and Dargai complexes, Pakistan, consist of harzburgite and dunite tectonites containing chromite deposits, pyroxenite, wehrlite, and gabbro. Both are ophiolite complexes. Palladium, platinum, and rhodium were found in concentrations of up to 170, 200, and 22 parts per billion, respectively. Average concentrations for both complexes and all rock types collected are 28 ppb palladium, 33 ppb platinum, and 9 ppb rhodium. The Pt:Pt+Pd ranges from 0.41 to 0.67 and averages 0.57. The concentration levels and ratios of these metals are similar to other alpine ultramafic bodies that have been analyzed by modern techniques.</p>","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Shorter contributions to mineralogy and petrology, 1979","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/pp1124F","usgsCitation":"Page, N.J., Haffty, J., and Ahmad, Z., 1980, Palladium, platinum, and rhodium concentrations in mafic and ultramafic rocks from the Zhob Valley and Dargai complexes, Pakistan: U.S. Geological Survey Professional Paper 1124, iii, 6 p., https://doi.org/10.3133/pp1124F.","productDescription":"iii, 6 p.","costCenters":[],"links":[{"id":399662,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":399660,"rank":1,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/pp/1124a-f/report.pdf"}],"country":"Pakistan","otherGeospatial":"Zhob Valley complex","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              67.5,\n              31\n            ],\n            [\n              68.25,\n              31\n            ],\n            [\n              68.25,\n              30.5\n            ],\n            [\n              67.5,\n              30.5\n            ],\n            [\n              67.5,\n              31\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Page, Norman J.","contributorId":46492,"corporation":false,"usgs":true,"family":"Page","given":"Norman","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":841458,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Haffty, Joseph","contributorId":79450,"corporation":false,"usgs":true,"family":"Haffty","given":"Joseph","email":"","affiliations":[],"preferred":false,"id":841459,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Ahmad, Zaki","contributorId":85205,"corporation":false,"usgs":true,"family":"Ahmad","given":"Zaki","email":"","affiliations":[],"preferred":false,"id":841460,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70188982,"text":"70188982 - 1980 - Lateral trends and vertical sequences in estuarine sediments, Willapa Bay, Washington","interactions":[],"lastModifiedDate":"2017-06-28T10:49:49","indexId":"70188982","displayToPublicDate":"1980-12-31T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Lateral trends and vertical sequences in estuarine sediments, Willapa Bay, Washington","docAbstract":"<p>Willapa Bay is a sizable estuary on the southern coast of Washington- Relatively unmodified in a geologic sense by human activity the bay provides an excellent example of modern depositional facies in an estuarine setting. </p><p>Studies of these deposits indicate that consistent lateral trends exist in sediment texture and sedimentary structures. The texture changes from sandy at the mouth of the bay to muddy in its upper parts. In any part of the bay , sediment is coarsest in the channel bottoms, where lag deposits accumulate. The sediment tends to fine in an upslope direction and is finest in supratidal flat deposits of silt and clay. </p><p>The nature of sedimentary structures depends on the combination of physical and biological processes and sediment textures. Bedforms exist wherever the bed is sandy. In the main tidal channels sandwaves and dunes up to 4 meters high occur. In tributary channels and at the margins of the main channel, at shallower depths and under less intense currents , the structures are generally less than a meter high. Current ripples occur in t he sandy bed of all of the tidal channels and in runoff channels cross the tidal flat. Symmetric long-crested ripples are produced by wave action over the sandy intertidal flat. </p><p>Internal structures in the bay's sediment depend not only on the nature of the bedform but also on the rate of bioturbation relative to physical processes. Under fields of large sandwaves or dunes, medium- to large-scale tabular and trough crossbedding predominates. This crossbedding generally is unidirectional, reflecting the locally dominant current (ebb or flood). Ripple bedding predominates elsewhere in sandy sediment within the channels. Where sand transport is diminished, as on the floor of the upper tributary channels, bioturbation exceeds the rate of production of physical structures and bedding is destroyed. The depositional banks in such areas tend to be sites of rapid sediment accumulation and bedding in the form of interlayered sand (commonly ripple bedded) and mud persists. On intertidal flats the sediment accumulates slowly and bioturbation erases nearly all physical structures. Bedding is preserved only where deposition is locally rapid , as in topographic depressions or on the depositional banks of runoff channels, or where faunal activity is inhibited, as beneath mounds of blue-green algae. The rate of sedimentation is slower still on the supratidal flats, but the general paucity of faunal activity allows the preservation of thin alternations of fine sand , silt or clay.</p><p> The lateral migration of the tidal channels produces vertical sequences in which topographically higher facies are superposed on one another. Near the mouth of the estuary the upward sequence: lag deposit — crossbedded sand — ripple or planar-bedded sand is typical. The crossbedding shows a general upward decrease in thickness and a progression from trough to tabular units. In the main tidal channel - in the central estuary and in sandy tributary channels, the typical vertical sequence resembles that near the mouth , with the exception that the sequence is capped by bioturbated sandy or muddy tide flat deposits. In the upper estuary , where muddy sediment predominates, a typical sequence shows the progression-. bioturbated lag deposit — gently dipping interlaminated sand and mud layers of the accretionary bank — bioturbated mud flat deposits — thinly laminated fine supratidal deposits. </p>","largerWorkType":{"id":24,"text":"Conference Paper"},"largerWorkSubtype":{"id":19,"text":"Conference Paper"},"conferenceTitle":"Pacific Coast Paleogreography Symposium 4: Quarternary Depositional Environments of the Pacific Coast","conferenceDate":"April 9, 1980","language":"English","publisher":"SEPM Society for Sedimentary Geology","usgsCitation":"Clifton, H.E., and Phillips, L., 1980, Lateral trends and vertical sequences in estuarine sediments, Willapa Bay, Washington, Pacific Coast Paleogreography Symposium 4: Quarternary Depositional Environments of the Pacific Coast, April 9, 1980, p. 55-71.","productDescription":"17 p.","startPage":"55","endPage":"71","costCenters":[],"links":[{"id":343067,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Oregon, Washington","otherGeospatial":"Columbia River, Willapa Bay","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -124.81018066406249,\n              45.91103315853962\n            ],\n            [\n              -123.03039550781249,\n              45.91103315853962\n            ],\n            [\n              -123.03039550781249,\n              47.23262467463881\n            ],\n            [\n              -124.81018066406249,\n              47.23262467463881\n            ],\n            [\n              -124.81018066406249,\n              45.91103315853962\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"596611cfe4b0d1f9f05cef36","contributors":{"authors":[{"text":"Clifton, H. Edward","contributorId":46503,"corporation":false,"usgs":true,"family":"Clifton","given":"H.","email":"","middleInitial":"Edward","affiliations":[],"preferred":false,"id":702204,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Phillips, L.","contributorId":63556,"corporation":false,"usgs":true,"family":"Phillips","given":"L.","email":"","affiliations":[],"preferred":false,"id":702205,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70207259,"text":"70207259 - 1980 - Research on interactive genetic-geological models to evaluate favourability for undiscovered uranium resources","interactions":[],"lastModifiedDate":"2020-06-01T19:52:46.74834","indexId":"70207259","displayToPublicDate":"1980-12-13T14:24:19","publicationYear":"1980","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"Research on interactive genetic-geological models to evaluate favourability for undiscovered uranium resources","docAbstract":"<p>Current methods of evaluating favourability for undiscovered uranium resources are unduly subjective, quite possibly inconsistent and, as a consequence, of questionable reliability. This research is aimed at reducing the subjectivity and increasing the reliability by designing an improved method that depends largely on geological data and their statistical frequency of occurrence. This progress report outlines a genetic approach to modelling the geological factors that controlled uranium mineralization in order to evaluate the favourability for the occurrence of undiscovered uranium deposits of the type modeled. A genetic model is constructed from all the factors that describe the processes, in chronological sequence, that formed uranium deposits thought to have a common origin. The field and laboratory evidence for the processes constitute a geologic occurrence base that parallels the chronological sequence of events. The genetic model and the geologic-occurrence base are portrayed as two columns of an interactive matrix called the \"genetic-geologic model\". For each column, eight chronological stages are used to describe the overall formation of the uranium deposits. These stages consist of (1) precursor processes; (2) host-rock formation; (3) preparation of host-rock; (4) uranium-source development; (5) transport of uranium; (6) primary uranium deposition; (7) post-deposition modification; and (8) preservation. To apply the genetic-geological model to evaluate favourability, a question is posed that determines the presence or absence of each attribute listed under the geologic-occurrence base. By building a logic circuit of the attributes according to either their essential or non-essential nature, the resultant match between a well-documented control area and the test area may be determined. The degree of match is a measure of favourability for uranium occurrence as hypothesized in the genetic model. This process of geological decision analysis results in a series of favourability maps that can be combined into a final composite favourability map. </p>","largerWorkType":{"id":24,"text":"Conference Paper"},"largerWorkTitle":"Uranium Evaluation and Mining Techniques: Proceedings of a Symposium Held in Buenos Aires, Argentina, 1–4 October 1979","largerWorkSubtype":{"id":19,"text":"Conference Paper"},"conferenceTitle":"Uranium Evaluation and Mining Techniques","conferenceDate":"October, 1-4, 1979","conferenceLocation":"Buenos Aires, Argentina","language":"English","publisher":"IAEA","isbn":"9200402801","usgsCitation":"Finch, W., Granger, H., Lupe, R., and McCammon, R., 1980, Research on interactive genetic-geological models to evaluate favourability for undiscovered uranium resources, <i>in</i> Uranium Evaluation and Mining Techniques: Proceedings of a Symposium Held in Buenos Aires, Argentina, 1–4 October 1979, Buenos Aires, Argentina, October, 1-4, 1979, p. 447-462.","productDescription":"16 p.","startPage":"447","endPage":"462","costCenters":[],"links":[{"id":370266,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Finch, W.I.","contributorId":75919,"corporation":false,"usgs":true,"family":"Finch","given":"W.I.","email":"","affiliations":[],"preferred":false,"id":777481,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Granger, H.C.","contributorId":15203,"corporation":false,"usgs":true,"family":"Granger","given":"H.C.","email":"","affiliations":[],"preferred":false,"id":777482,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Lupe, R.D.","contributorId":107696,"corporation":false,"usgs":true,"family":"Lupe","given":"R.D.","affiliations":[],"preferred":false,"id":777483,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"McCammon, R.B.","contributorId":17218,"corporation":false,"usgs":true,"family":"McCammon","given":"R.B.","email":"","affiliations":[],"preferred":false,"id":777484,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70120130,"text":"70120130 - 1980 - The effect of band loss on estimates of annual survival","interactions":[],"lastModifiedDate":"2014-08-12T13:44:06","indexId":"70120130","displayToPublicDate":"1980-12-01T13:37:13","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2284,"text":"Journal of Field Ornithology","active":true,"publicationSubtype":{"id":10}},"title":"The effect of band loss on estimates of annual survival","docAbstract":"<p>Banding has proven to be a useful technique in the study of population dynamics of avian species.  However, band loss has long been recognized as a potential problem, (Hickey, 1952; Ludwig, 1967).  Recently, Brownie et al. (1978) presented 14 models based on an array of explicit assumptions for the analysis of band recovery data.  Various estimation models (assumption sets) allowed survival and/or recovery rates to be (a) constant, (b) time-specific, or (c) time- and age-specific.  Optimal inference methods were employed and statistical tests of critical assumptions were developed and emphasized.</p>\n<br/>\n<p>The methods of Brownie et al. (1978), as with all previously published methods of which we are aware, assume no loss of bands during the study.  However, some band loss is certain to occur and this potentially biases the estimates of annual survival rates whatever the analysis method.  A few empirical studies have estimated band loss rates (a notable exception is Ludwig, 1967); consequently, for almost all band recovery data, the exact rate of band loss is unknown.  In this paper we investigate the bias in estimates of annual survival rates due to varying degrees of hypothesized band loss.  Our main results are based on perhaps the most useful model, originally developed by Seber (1970), for estimation of annual survival rate.  Inferences are made concerning the bias of estimated survival rates in other models because the structure of these estimators is similar.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Field Ornithology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Northeastern Bird-Banding Association","publisherLocation":"Ipswich, NH","usgsCitation":"Nelson, L.J., Anderson, D.R., and Burnham, K.P., 1980, The effect of band loss on estimates of annual survival: Journal of Field Ornithology, v. 51, no. 1, p. 30-38.","productDescription":"9 p.","startPage":"30","endPage":"38","numberOfPages":"9","costCenters":[],"links":[{"id":292037,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"51","issue":"1","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53eb2a90e4b0461e44764ad7","contributors":{"authors":[{"text":"Nelson, Louis J.","contributorId":106028,"corporation":false,"usgs":true,"family":"Nelson","given":"Louis","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":497945,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Anderson, David R.","contributorId":92722,"corporation":false,"usgs":true,"family":"Anderson","given":"David","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":497943,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Burnham, Kenneth P.","contributorId":95025,"corporation":false,"usgs":true,"family":"Burnham","given":"Kenneth","email":"","middleInitial":"P.","affiliations":[{"id":189,"text":"Colorado Cooperative Fish and Wildlife Research Unit","active":false,"usgs":true}],"preferred":false,"id":497944,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70012225,"text":"70012225 - 1980 - Aeromagnetic and radio echo ice-sounding measurements show much greater area of the Dufek intrusion, Antarctica","interactions":[],"lastModifiedDate":"2026-01-12T16:42:33.621979","indexId":"70012225","displayToPublicDate":"1980-08-29T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3338,"text":"Science","active":true,"publicationSubtype":{"id":10}},"title":"Aeromagnetic and radio echo ice-sounding measurements show much greater area of the Dufek intrusion, Antarctica","docAbstract":"<p><span id=\"_mce_caret\" data-mce-bogus=\"1\" data-mce-type=\"format-caret\"><span>A combined aeromagnetic and radio echo ice-sounding survey made in 1978 in Antarctica over the Dufek layered mafic intrusion suggests a minimum area of the intrusion of about 50,000 square kilometers, making it comparable in size with the Bushveld Complex of Africa. Comparisons of the magnetic and subglacial topographic profiles illustrate the usefulness of this combination of methods in studying bedrock geology beneath ice-covered areas. Magnetic anomalies range in peak-to-trough amplitude from about 50 nanoteslas over the lowermost exposed portion of the section in the Dufek Massif to about 3600 nanoteslas over the uppermost part of the section in the Forrestal Range. Theoretical magnetic anomalies, computed from a model based on the subice topography fitted to the highest amplitude observed magnetic anomalies, required normal and reversed magnetizations ranging from 10</span><sup>-3</sup><span>&nbsp;to 10</span><sup>-2</sup><span>&nbsp;electromagnetic units per cubic centimeter. This result is interpreted as indicating that the Dufek intrusion cooled through the Curie isotherm during one or more reversals of the earth's magnetic field.</span></span></p>","language":"English","publisher":"American Association for the Advancement of Scienc","doi":"10.1126/science.209.4460.1014","issn":"00368075","usgsCitation":"Behrendt, J.C., Drewry, D., Jankowski, E., and Grim, M.S., 1980, Aeromagnetic and radio echo ice-sounding measurements show much greater area of the Dufek intrusion, Antarctica: Science, v. 209, no. 4460, p. 1014-1017, https://doi.org/10.1126/science.209.4460.1014.","productDescription":"4 p.","startPage":"1014","endPage":"1017","costCenters":[],"links":[{"id":222581,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"otherGeospatial":"Antarctica","volume":"209","issue":"4460","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059e72ee4b0c8380cd478b5","contributors":{"authors":[{"text":"Behrendt, John C. jbehrendt@usgs.gov","contributorId":25945,"corporation":false,"usgs":true,"family":"Behrendt","given":"John","email":"jbehrendt@usgs.gov","middleInitial":"C.","affiliations":[{"id":218,"text":"Denver Federal Center","active":false,"usgs":true},{"id":213,"text":"Crustal Imaging and Characterization Team","active":false,"usgs":true}],"preferred":false,"id":363025,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Drewry, D.J.","contributorId":41968,"corporation":false,"usgs":true,"family":"Drewry","given":"D.J.","email":"","affiliations":[],"preferred":false,"id":363026,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Jankowski, E.","contributorId":7420,"corporation":false,"usgs":true,"family":"Jankowski","given":"E.","email":"","affiliations":[],"preferred":false,"id":363024,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Grim, M. S.","contributorId":102884,"corporation":false,"usgs":true,"family":"Grim","given":"M.","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":363027,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70169343,"text":"70169343 - 1980 - Biological considerations in the delineation of critical habitat","interactions":[],"lastModifiedDate":"2016-03-25T10:54:02","indexId":"70169343","displayToPublicDate":"1980-08-28T12:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":5,"text":"Book chapter"},"publicationSubtype":{"id":24,"text":"Book Chapter"},"title":"Biological considerations in the delineation of critical habitat","docAbstract":"<p>Grizzly bears (<i>Ursus arctos</i>) require large areas to satisfy their needs for food, cover, and space. They thrive best where disturbance by man is minimal. It is not a coincidence that the two major grizzly bear populations in the lower 48 states exist in large wilderness systems closely associated with two large national parks and a relatively large game preserve. If management objectives for these areas do not change, and man-bear interactions can be kept low, viable grizzly bear populations can be maintained. Outside of parks and wilderness areas, the picture is less clear. Grizzly bears adapt to some habitat modifications. the extent of their adaptability to habitat modification or human interaction is largely unknown. Answers to many pertinent questions will be slow in coming. In the meantime, management policies based on common sense rather than on adversary reactions among agencies are the best insurance of the grizzlies' survival.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Bears: Their biology and management","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"Fourth International Conference on Bear Research and Management","conferenceDate":"February 1977","conferenceLocation":"Kalispell, MT","language":"English","publisher":"International Union for Conservation of Nature and Natural Resources","publisherLocation":"Morges, Switzerland","doi":"10.2307/3872833","usgsCitation":"Knight, R.R., 1980, Biological considerations in the delineation of critical habitat, chap. <i>of</i> Bears: Their biology and management, v. 4, p. 1-3, https://doi.org/10.2307/3872833.","productDescription":"3 p.","startPage":"1","endPage":"3","numberOfPages":"3","onlineOnly":"N","additionalOnlineFiles":"N","costCenters":[{"id":481,"text":"Northern Rocky Mountain Science Center","active":true,"usgs":true}],"links":[{"id":319392,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"56f66134e4b07d796bf76ff8","contributors":{"authors":[{"text":"Knight, Richard R.","contributorId":68660,"corporation":false,"usgs":true,"family":"Knight","given":"Richard","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":623854,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70012213,"text":"70012213 - 1980 - Sediment waves on the Monterey fan levee: a preliminary physical interpretation.","interactions":[],"lastModifiedDate":"2024-09-27T14:57:36.972885","indexId":"70012213","displayToPublicDate":"1980-08-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2667,"text":"Marine Geology","active":true,"publicationSubtype":{"id":10}},"title":"Sediment waves on the Monterey fan levee: a preliminary physical interpretation.","docAbstract":"<p><span>Sediment waves on the deep ocean floor occur mostly on the lower continental rise on slopes of 1° or less. Previous studies show that their amplitude and wavelength vary greatly, but little is known about their shape in plan. A detailed survey of a 30-km</span><sup>2</sup><span>&nbsp;area of abyssal-depth sediment waves associated with the levee of the Monterey fan valley shows a pattern of sinuous crests and troughs with parallel, well-bedded internal structure. Material in the upper 1 m of sediment consists predominantly of bioturbated, muddy coccolith ooze. A single thin, silty horizon can be correlated between adjoining waves.</span></p><p><span>On the basis of measured wave dimensions and an estimate of flow velocity we use a simple two-layer model for water movement to infer approximate flow parameters. The sediment waves are considered to be formed most likely by low-velocity (10 cm/s), low-concentration turbidity flows approximately 100–800 m thick. This interpretation emphasizes the role of low-speed, low-concentration turbidity currents in the downslope movement of fine-grained material. This type of transport—deposition regime explains the formation of sediment waves very well except for certain waves occurring on depositional ridges in the deep ocean.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0025-3227(80)90009-2","usgsCitation":"Normark, W.R., Hess, G.R., Stow, D., and Bowen, A., 1980, Sediment waves on the Monterey fan levee: a preliminary physical interpretation.: Marine Geology, v. 37, no. 1-2, p. 1-18, https://doi.org/10.1016/0025-3227(80)90009-2.","productDescription":"18 p.","startPage":"1","endPage":"18","costCenters":[],"links":[{"id":222399,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"37","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b89f0e4b08c986b316f53","contributors":{"authors":[{"text":"Normark, William R.","contributorId":69570,"corporation":false,"usgs":true,"family":"Normark","given":"William","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":363001,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hess, Gordon R.","contributorId":102119,"corporation":false,"usgs":true,"family":"Hess","given":"Gordon","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":362999,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Stow, D.A.V.","contributorId":35441,"corporation":false,"usgs":true,"family":"Stow","given":"D.A.V.","email":"","affiliations":[],"preferred":false,"id":363000,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bowen, A.J.","contributorId":87292,"corporation":false,"usgs":true,"family":"Bowen","given":"A.J.","email":"","affiliations":[],"preferred":false,"id":363002,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70120079,"text":"70120079 - 1980 - Effect of delayed reporting of band recoveries on survival estimates","interactions":[],"lastModifiedDate":"2014-08-12T09:27:31","indexId":"70120079","displayToPublicDate":"1980-07-01T09:18:16","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2284,"text":"Journal of Field Ornithology","active":true,"publicationSubtype":{"id":10}},"title":"Effect of delayed reporting of band recoveries on survival estimates","docAbstract":"<p>Brownie et al. (U.S. Fish and Wildl. Serv., Resource Publ. 131, 1978) presented 14 models based on an array of explicit assumptions for the study of survival in avian populations.  These methods are replacing the life table methods previously used to estimate survival rates (e.g., Burnham and Anderson, <i>J. Wildl. Manage.</i>, <b>43:</b> 356-366, 1979).  The new methods allow survival or recovery rates, or both, to be constant, time-specific, or time- and age-specific.</p>\n<br/>\n<p>In studies to estimate survival rates for birds the data are often from recoveries of birds shot or found dead during the hunting season and reported to the Bird Banding Laboratory by sportsmen, conservation agency employees, or the general public.  This note examines the bias in estimating annual survival due to a proportion of the recoveries being incorrectly reported a year late.  Specifically, a few recoveries each year of, for example, adult male American Widgeon (<i>Anas americana</i>) banded in California are reported as being recovered in year i + 1 when in fact they were actually recovered the previous year i.  Delayed reporting might typically be caused by people finding a band in their health clothing in the fall of the year and, being embarrassed about their failure to report the band when it was taken, report it a year late not mentioning the actual year of recovery.  Heuristically, delayed reporting should bias estimated annual survival rates upwards because it appears from the data that the birds corresponding to the \"delayed\" recoveries actually lived an additional year.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Field Ornithology","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Northeastern Bird-Banding Association","publisherLocation":"Ipswich, NH","usgsCitation":"Anderson, D.R., and Burnham, K.P., 1980, Effect of delayed reporting of band recoveries on survival estimates: Journal of Field Ornithology, v. 51, no. 3, p. 244-247.","productDescription":"4 p.","startPage":"244","endPage":"247","numberOfPages":"4","costCenters":[],"links":[{"id":291991,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"51","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53eb2a68e4b0461e447649f6","contributors":{"authors":[{"text":"Anderson, David R.","contributorId":92722,"corporation":false,"usgs":true,"family":"Anderson","given":"David","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":497875,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Burnham, Kenneth P.","contributorId":95025,"corporation":false,"usgs":true,"family":"Burnham","given":"Kenneth","email":"","middleInitial":"P.","affiliations":[{"id":189,"text":"Colorado Cooperative Fish and Wildlife Research Unit","active":false,"usgs":true}],"preferred":false,"id":497876,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70012433,"text":"70012433 - 1980 - Sediment transport in Norton Sound, Alaska","interactions":[],"lastModifiedDate":"2024-10-11T15:35:55.48006","indexId":"70012433","displayToPublicDate":"1980-05-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2667,"text":"Marine Geology","active":true,"publicationSubtype":{"id":10}},"title":"Sediment transport in Norton Sound, Alaska","docAbstract":"<p>The Yukon River, the largest single source of Bering Sea sediment, delivers &gt; 95% of its sediment load at the southwest comer of Norton Sound during the ice-free months of late May through October. During this period, surface winds in the northern Bering Sea area are generally light from the south and southwest, and surface waves are not significant. Although wind stress may cause some transport of low-density turbid surface water into the head of Norton Sound, the most significant transport of Yukon River suspended matter occurs within advective currents flowing north across the outer part of the sound. The thickest accumulations of modern Yukon silt and very fine sand occur beneath this persistent current.</p><p><span>We monitored temporal variations in bottom currents, pressure, and suspended-matter concentrations within this major transport pathway for 80 days in the summer of 1977 using a Geological Processes Bottom Environmental (GEOPROBE) tripod system. The record reveals two distinctive periods of bottom flow and sediment transport: an initial 59 days (July 8–September 5) of fair-weather conditions, characterized by tidally dominated currents and relatively low, stable suspended-matter concentrations; and a 21-day period (September 5–September 26) during which several storms traversed the northern Bering Sea, mean suspended-matter concentrations near the bottom increased by a factor of five, and the earlier tidal dominance was overshadowed by wind-driven and oscillatory wave-generated currents.</span></p><p><span>Friction velocities (u<sub>*</sub>) at the GEOPROBE site were generally subcritical during the initial fair-weather period. In contrast, the 21-day stormy period was characterized by uFriction velocities (u<sub>*</sub>) at the GEOPROBE site were generally subcritical during the initial fair-weather period. In contrast, the 21-day stormy period was characterized by u<sub>*</sub>values that exceeded the critical level of 1.3 cm/s more than 60% of the time. The GEOPROBE data suggest that the very fine sand constituting about 50% of the sediment on the outer part of the Yukon prodelta is transported during a few late-summer and fall storms each year. A conservative estimate shows that suspended-matter transport during the storms in September 1977 was equal to four months of fair-weather transport.  values that exceeded the critical level of 1.3 cm/s more than 60% of the time. The GEOPROBE data suggest that the very fine sand constituting about 50% of the sediment on the outer part of the Yukon prodelta is transported during a few late-summer and fall storms each year. A conservative estimate shows that suspended-matter transport during the storms in September 1977 was equal to four months of fair-weather transport. </span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0025-3227(80)90043-2","usgsCitation":"Drake, D., Cacchione, D., Muench, R., and Nelson, C., 1980, Sediment transport in Norton Sound, Alaska: Marine Geology, v. 36, no. 1-2, p. 97-126, https://doi.org/10.1016/0025-3227(80)90043-2.","productDescription":"30 p.","startPage":"97","endPage":"126","costCenters":[],"links":[{"id":222201,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Norton Sound","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"coordinates\": [\n          [\n            [\n              -166.93816207810704,\n              65.1847517876121\n            ],\n            [\n              -166.93816207810704,\n              62.997485781439735\n            ],\n            [\n              -160.32671205235334,\n              62.997485781439735\n            ],\n            [\n              -160.32671205235334,\n              65.1847517876121\n            ],\n            [\n              -166.93816207810704,\n              65.1847517876121\n            ]\n          ]\n        ],\n        \"type\": \"Polygon\"\n      }\n    }\n  ]\n}","volume":"36","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505b89d9e4b08c986b316ee5","contributors":{"authors":[{"text":"Drake, D.E.","contributorId":48150,"corporation":false,"usgs":true,"family":"Drake","given":"D.E.","email":"","affiliations":[],"preferred":false,"id":363567,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Cacchione, D.A.","contributorId":65448,"corporation":false,"usgs":true,"family":"Cacchione","given":"D.A.","affiliations":[{"id":520,"text":"Pacific Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":false,"id":363568,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Muench, R.D.","contributorId":83270,"corporation":false,"usgs":true,"family":"Muench","given":"R.D.","email":"","affiliations":[],"preferred":false,"id":363569,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Nelson, C.H.","contributorId":88346,"corporation":false,"usgs":true,"family":"Nelson","given":"C.H.","email":"","affiliations":[],"preferred":false,"id":363570,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70209771,"text":"70209771 - 1980 - Allochthonous Jurassic ophiolite in northwest Washington","interactions":[],"lastModifiedDate":"2020-04-24T19:36:33.816797","indexId":"70209771","displayToPublicDate":"1980-04-24T14:26:00","publicationYear":"1980","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":"Allochthonous Jurassic ophiolite in northwest Washington","docAbstract":"<p>Fragments of Jurassic ophiolite having U-Pb zircon ages narrowly grouped at 160 to 170 m.y. are widespread over parts of northwest Washington. The Haystack thrust fault is inferred to mark the base of the ophiolite in the San Juan Islands and adjacent Cascade foothills; other bodies of mafic and ultramafic rock in the western Cascades may be klippen of the Haystack thrust plate. The Haystack thrust fault is probably the structurally highest and possibly most extensive thrust yet recognized within a family of Late Cretaceous thrust faults in northwest Washington.</p><p>The ophiolite and its time of emplacement (bracketed between about 100 and 88 m.y.) suggest a similarity with the Coast Range thrust of California which thrust Upper Jurassic ophiolite and the Great Valley sedimentary sequence over the Franciscan assemblage. However, relations in the Cascades are complicated by the extraordinarily diverse character of lower plate rocks, of which very few resemble the Franciscan. We conclude that an original subduction system was modified by later tectonic activity so that a variety of terranes was juxtaposed as a family of rootless thrusts, with the ophiolite forming, at least in some areas, the uppermost structural unit. Perhaps the emplacement of Wrangellia, an allochthonous microcontinent west of the San Juan Islands, caused the thrusting.</p>","language":"English","publisher":"GSA","doi":"10.1130/0016-7606(1980)91<359:AJOINW>2.0.CO;2","usgsCitation":"Whetten, J.T., Zartman, R., Blakely, R.J., and Jones, D.L., 1980, Allochthonous Jurassic ophiolite in northwest Washington: GSA Bulletin, v. 91, no. 6, p. 359-368, https://doi.org/10.1130/0016-7606(1980)91<359:AJOINW>2.0.CO;2.","productDescription":"10 p.","startPage":"359","endPage":"368","costCenters":[{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"links":[{"id":374270,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Washington","otherGeospatial":"Northwest Washington","geographicExtents":"{\n  \"type\": \"FeatureCollection\",\n  \"features\": [\n    {\n      \"type\": \"Feature\",\n      \"properties\": {},\n      \"geometry\": {\n        \"type\": \"Polygon\",\n        \"coordinates\": [\n          [\n            [\n              -123.53027343749999,\n              48.100094697973795\n            ],\n            [\n              -121.871337890625,\n              48.100094697973795\n            ],\n            [\n              -121.871337890625,\n              48.90083790234091\n            ],\n            [\n              -123.53027343749999,\n              48.90083790234091\n            ],\n            [\n              -123.53027343749999,\n              48.100094697973795\n            ]\n          ]\n        ]\n      }\n    }\n  ]\n}","volume":"91","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Whetten, John T.","contributorId":102444,"corporation":false,"usgs":true,"family":"Whetten","given":"John","email":"","middleInitial":"T.","affiliations":[],"preferred":false,"id":787941,"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":787942,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Blakely, Richard J. 0000-0003-1701-5236 blakely@usgs.gov","orcid":"https://orcid.org/0000-0003-1701-5236","contributorId":1540,"corporation":false,"usgs":true,"family":"Blakely","given":"Richard","email":"blakely@usgs.gov","middleInitial":"J.","affiliations":[{"id":662,"text":"Western Mineral and Environmental Resources Science Center","active":true,"usgs":true},{"id":312,"text":"Geology, Minerals, Energy, and Geophysics Science Center","active":true,"usgs":true}],"preferred":true,"id":787943,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Jones, David L.","contributorId":61925,"corporation":false,"usgs":true,"family":"Jones","given":"David","email":"","middleInitial":"L.","affiliations":[],"preferred":false,"id":787944,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70112924,"text":"70112924 - 1980 - Need for new sensors to map lithologic units","interactions":[],"lastModifiedDate":"2014-06-18T12:32:41","indexId":"70112924","displayToPublicDate":"1980-04-17T12:14:02","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3393,"text":"Sixth Annual Pecora Symposium and Exposition","active":true,"publicationSubtype":{"id":10}},"title":"Need for new sensors to map lithologic units","docAbstract":"<p>One of the most important contributions that remote sensing can make to mineral energy explorations to provide data from satellites to augment regional geological mapping.  Geologic maps, which show information on the subsurface, are the main basis for formulating models of resource genesis that guide exploration.  However, conventional compilation procedures are time-consuming and therefore often slow the pace of exploration, especially in large, inaccessible areas.  Landsat Multispectral Scanner (MSS) images have been applied to a wide variety of specific geological problems, including discrimination of lithologic and delineation of previously unrecognized tectonic features.  However, these lithologic distinctions are based on brightness, spectral reflectance, and, less commonly, the morphology of the unit, which in the wavelength region of MSS images are only rarely diagnostic of specific mineralogical content.  Limonite is the only lithological material that can be identified be analyzing MSS spectral radiance.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Sixth Annual Pecora Symposium and Exposition","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Society of Exploration Geophysicists","publisherLocation":"Tulsa, OK","usgsCitation":"Rowan, L.C., 1980, Need for new sensors to map lithologic units: Sixth Annual Pecora Symposium and Exposition, p. 106-107.","productDescription":"2 p.","startPage":"106","endPage":"107","numberOfPages":"2","costCenters":[],"links":[{"id":288806,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53ae7783e4b0abf75cf2c164","contributors":{"editors":[{"text":"Barringer, Anthony R.","contributorId":112053,"corporation":false,"usgs":true,"family":"Barringer","given":"Anthony","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":509905,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Rowan, Lawrence C.","contributorId":58629,"corporation":false,"usgs":true,"family":"Rowan","given":"Lawrence","email":"","middleInitial":"C.","affiliations":[],"preferred":false,"id":494945,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70112923,"text":"70112923 - 1980 - Detection and modeling of subsurface coal oxidation","interactions":[],"lastModifiedDate":"2014-06-18T12:13:03","indexId":"70112923","displayToPublicDate":"1980-04-16T12:07:48","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3393,"text":"Sixth Annual Pecora Symposium and Exposition","active":true,"publicationSubtype":{"id":10}},"title":"Detection and modeling of subsurface coal oxidation","docAbstract":"<p>The oxidation and sustained ignition of coal and coaly wastes within surface coal mine spoils in the southwestern U.S. have hampered the success of reclamation efforts at these locations.  To assess better the magnitude, depth, geometry, and dynamics of the oxidation process thermal infrared remote sensing data have been used.  Digital thermal imagery was found to be useful for this purpose and was integrated with finite different heat transfer models to yield predictions of several characteristics of the thermal source.  In addition to thermal infrared imagery, aerial color and false color infrared imagery were found to provide useful information for the interpretation of oxidation phenomena by means of variations in surface vegetation, color of the surface material, subsidence, etc.  The combined use of thermal infrared imagery and thermal modeling techniques are well suited for use in exploration and interpretation of other thermal targets.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Sixth Annual Pecora Symposium and Exposition","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Society of Exploration Geophysicists","publisherLocation":"Tulsa, OK","usgsCitation":"Leonhart, L.S., and Rasmussen, W.O., 1980, Detection and modeling of subsurface coal oxidation: Sixth Annual Pecora Symposium and Exposition, p. 83-83.","productDescription":"1 p.","startPage":"83","endPage":"83","numberOfPages":"1","costCenters":[],"links":[{"id":288805,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53ae7680e4b0abf75cf2bf72","contributors":{"editors":[{"text":"Barringer, Anthony R.","contributorId":112053,"corporation":false,"usgs":true,"family":"Barringer","given":"Anthony","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":509904,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"Leonhart, Leo S.","contributorId":77050,"corporation":false,"usgs":true,"family":"Leonhart","given":"Leo","email":"","middleInitial":"S.","affiliations":[],"preferred":false,"id":494944,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Rasmussen, William O.","contributorId":6376,"corporation":false,"usgs":true,"family":"Rasmussen","given":"William","email":"","middleInitial":"O.","affiliations":[],"preferred":false,"id":494943,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70112909,"text":"70112909 - 1980 - Interpretation of long- and short-wavelength magnetic anomalies","interactions":[],"lastModifiedDate":"2014-06-18T10:57:11","indexId":"70112909","displayToPublicDate":"1980-04-15T10:40:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":3393,"text":"Sixth Annual Pecora Symposium and Exposition","active":true,"publicationSubtype":{"id":10}},"title":"Interpretation of long- and short-wavelength magnetic anomalies","docAbstract":"<p>Magset was launched on October 30, 1979.  More than a decade of examining existing data, devising appropriate models of the global magnetic field, and extending methods for interpreting long-wavelength magnetic anomalies preceded this launch</p>\n<br/>\n<p>Magnetic data collected by satellite can be interrupted by using a method of analysis that quantitively describes the magnetic field resulting from three-dimensional geologic structures that are bounded by an arbitrary number of polygonal faces,  Each face my have any orientation and three or more sides.  At each point of the external field, the component normal to each face is obtained by using an expression for the solid angle subtended by a generalized polygon.  The \"cross\" of tangential components are relatively easy to obtain for the same polygons.</p>\n<br/>\n<p>No approximations have been made related to orbit height that restrict the dimensions of the polygons relative to the distance from the external field points.  This permits the method to be used to model shorter wavelength anomalies obtained from aircraft or ground surveys.</p>\n<br/>\n<p>The magnetic fields for all the structures considered are determine in the same rectangular coordinate system.  The coordinate system is in depended from the orientation of geologic trends and permits multiple structures or bodies to be included in the same magnetic field calculations.  This single reference system also simplified adjustments in position and direction to account for earth curvature in regional interpretation.</p>","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Sixth Annual Pecora Symposium and Exposition","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Society of Exploration Geophysicists","publisherLocation":"Tulsa, OK","usgsCitation":"DeNoyer, J.M., 1980, Interpretation of long- and short-wavelength magnetic anomalies: Sixth Annual Pecora Symposium and Exposition, p. 51-51.","productDescription":"1 p.","startPage":"51","endPage":"51","numberOfPages":"1","costCenters":[],"links":[{"id":288790,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53ae7753e4b0abf75cf2c0f9","contributors":{"editors":[{"text":"Barringer, Anthony R.","contributorId":112053,"corporation":false,"usgs":true,"family":"Barringer","given":"Anthony","email":"","middleInitial":"R.","affiliations":[],"preferred":false,"id":509899,"contributorType":{"id":2,"text":"Editors"},"rank":1}],"authors":[{"text":"DeNoyer, John M.","contributorId":96271,"corporation":false,"usgs":true,"family":"DeNoyer","given":"John","email":"","middleInitial":"M.","affiliations":[],"preferred":false,"id":494911,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70012248,"text":"70012248 - 1980 - Sedimentology and geochemistry of surface sediments, outer continental shelf, southern Bering Sea","interactions":[],"lastModifiedDate":"2024-10-09T17:17:13.039769","indexId":"70012248","displayToPublicDate":"1980-04-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2667,"text":"Marine Geology","active":true,"publicationSubtype":{"id":10}},"title":"Sedimentology and geochemistry of surface sediments, outer continental shelf, southern Bering Sea","docAbstract":"<p>Present-day sediment dynamics, combined with lowerings of sea level during the Pleistocene, have created a mixture of sediments on the outer continental shelf of the southern Bering Sea that was derived from the Alaskan Mainland, the Aleutian Islands, and the Pribilof ridge. Concentrations of finer-grained, higher-organic sediments in the region of the St. George basin have further modified regional distribution patterns of sediment composition. </p><p>Q-mode factor analysis of 58 variables related to sediment size and composition - including content of major, minor, and trace elements, heavy and light minerals, and clay minerals - reveals three dominant associations of sediment: </p><p>1. (1) The most significant contribution, forming a coarse-grained sediment scattered over most of the shelf consists of felsic sediment derived from the generally quartz-rich rocks of the Alaskan mainland. This sediment contains relatively high concentrations of Si, Ba, Rb, quartz, garnet, epidote, metamorphic rock fragments, potassium feldspar, and illite. </p><p>2. (2) The next most important group, superimposed on the felsic group consists of andesitic sediment derived from the Aleutian Islands. This more mafic sediment contains relatively high concentrations of Na, Ca, Ti, Sr, V, Mn, Cu, Fe, Al, Co, Zn, Y, Yb, Ga, volcanic rock fragments, glass, clinopyroxene, smectite, and vermiculite. </p><p>3. (3) A local group of basaltic sediment, derived from rocks of the Pribilof Islands, is a subgroup of the Aleutian andesite group. Accumulation of fine-grained sediment in St. George basin has created a sediment group containing relatively high concentrations of C, S, U, Li, B, Zr, Ga, Hg, silt, and clay. </p><p>Sediment of the Aleutian andesite group exhibits a strong gradient, or \"plume\", with concentrations decreasing away from Unimak Pass and toward St. George basin. The absence of present-day currents sufficient to move even clay-size material as well as the presence of Bering submarine canyon between the Aleutian Islands and the outer continental shelf and slope, indicates that Holocene sediment dynamics cannot be used to explain the observed distribution of surface sediment derived from the Aleutian Islands. We suggest that this pattern is relict and resulted from sediment dynamics during lower sea levels of the Pleistocene.&nbsp;</p>","language":"English","publisher":"Elsevier","doi":"10.1016/0025-3227(80)90123-1","usgsCitation":"Gardner, J., Dean, W., and Vallier, T., 1980, Sedimentology and geochemistry of surface sediments, outer continental shelf, southern Bering Sea: Marine Geology, v. 35, no. 4, p. 299-329, https://doi.org/10.1016/0025-3227(80)90123-1.","productDescription":"31 p.","startPage":"299","endPage":"329","costCenters":[{"id":310,"text":"Geology, Minerals, Energy and Geophysics Science Center","active":false,"usgs":true}],"links":[{"id":221936,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"country":"United States","state":"Alaska","otherGeospatial":"Bering 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,{"id":1416,"text":"1416 - 1980 - Development of uranium exploration models for the Prospector consultant system: final report covering the period September 22, 1978 to September 21, 1979","interactions":[],"lastModifiedDate":"2014-07-10T08:49:26","indexId":"1416","displayToPublicDate":"1980-03-01T08:47:20","publicationYear":"1980","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":6,"text":"USGS Unnumbered Series"},"title":"Development of uranium exploration models for the Prospector consultant system: final report covering the period September 22, 1978 to September 21, 1979","docAbstract":"No abstract available.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"SRI project 7856","largerWorkSubtype":{"id":6,"text":"USGS Unnumbered Series"},"language":"English","publisher":"U.S. Geological Survey","doi":"10.3133/1416","usgsCitation":"Gaschnig, J., 1980, Development of uranium exploration models for the Prospector consultant system: final report covering the period September 22, 1978 to September 21, 1979, ix, 603 p., https://doi.org/10.3133/1416.","productDescription":"ix, 603 p.","numberOfPages":"612","temporalStart":"1978-09-22","temporalEnd":"1979-09-21","costCenters":[],"links":[{"id":289698,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53bfb5f6e4b06d97a6487d0b","contributors":{"authors":[{"text":"Gaschnig, John","contributorId":15933,"corporation":false,"usgs":true,"family":"Gaschnig","given":"John","affiliations":[],"preferred":false,"id":143709,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70231445,"text":"70231445 - 1980 - High throughput Landsat imagery film recorder","interactions":[],"lastModifiedDate":"2022-05-10T17:48:51.594749","indexId":"70231445","displayToPublicDate":"1980-02-12T12:38:55","publicationYear":"1980","noYear":false,"publicationType":{"id":24,"text":"Conference Paper"},"publicationSubtype":{"id":19,"text":"Conference Paper"},"title":"High throughput Landsat imagery film recorder","docAbstract":"<p>The Earth Resources Observation Systems (EROS) Data Center is responsible for processing, archiving, reproducing, and distributing satellite and aircraft remotely-sensed Earth imagery data in both film and digital format. Landsat Multispectral Scanner (MSS) and Return Beam Vidicon (RBV) sensor data alone represents a daily recording requirement of 23 billion pixels on 1000 feet of film. New satellites and sensors may double this amount of data within two years. To handle these requirements, the EROS Data Center installed an operational, multi-mode, programmable, high throughput, high resolution laser-beam film recording system directly on-line to the primary digital image processing computer. This system employs an Argon-Ion laser light source, electro-optic modulator, and rotating mirror to expose film in a flat-field line-scanned format at rates up to 400 lines per second. Laboratory-type requirements, such as a geometric fidelity of ± 0.05% and density repeatability within ± 0.05D, are maintained in a high-throughput production environment. To provide for future sensor formats, the scan rate, scanning spot size, film velocity, laser power, and number of overscans are firmware programmable for up to 16 on-line, auto-matically selectable configurations.</p>","largerWorkType":{"id":4,"text":"Book"},"largerWorkTitle":"Proceedings Volume 0200, Laser Recording and Information Handling","largerWorkSubtype":{"id":12,"text":"Conference publication"},"conferenceTitle":"23rd Annual Technical Symposium","conferenceDate":"1979","conferenceLocation":"San Diego, California, United States","language":"English","publisher":"Society of Photo-Optical Instrumentation Engineers","doi":"10.1117/12.958075","usgsCitation":"Ulmer, D.E., 1980, High throughput Landsat imagery film recorder, <i>in</i> Proceedings Volume 0200, Laser Recording and Information Handling, v. 200, San Diego, California, United States, 1979, p. 114-124, https://doi.org/10.1117/12.958075.","productDescription":"11 p.","startPage":"114","endPage":"124","costCenters":[{"id":222,"text":"Earth Resources Observation and Science (EROS) Center","active":true,"usgs":true}],"links":[{"id":400443,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"200","noUsgsAuthors":false,"publicationStatus":"PW","contributors":{"authors":[{"text":"Ulmer, David E.","contributorId":291593,"corporation":false,"usgs":false,"family":"Ulmer","given":"David","email":"","middleInitial":"E.","affiliations":[],"preferred":false,"id":842627,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70012312,"text":"70012312 - 1980 - Current-controlled, abyssal microtopography and sedimentation in Mozambique Basin, southwest Indian Ocean","interactions":[],"lastModifiedDate":"2024-10-09T17:23:27.334052","indexId":"70012312","displayToPublicDate":"1980-02-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2667,"text":"Marine Geology","active":true,"publicationSubtype":{"id":10}},"title":"Current-controlled, abyssal microtopography and sedimentation in Mozambique Basin, southwest Indian Ocean","docAbstract":"<p><span>The Antarctic Bottom Water (AABW) activity and the variations in the abundance and grain size of the terrigenous sediments, derived from Africa and Madagascar land masses, are reflected in different types of microtopography in the Mozambique Basin. In southerly areas, where the sediment supply is much less, the bottom-current activity has resulted in the presence of manganese nodules, a thin veneer of sediments, and the absence of sediment waves. Farther north, along the marginal areas of the basin where the fine-grained sediments from the Africa—Madagascar source have been supplied in abundance, wavy bedforms have been generated by AABW. Wavy bedforms do not exist even in the northerly areas if coarse-grained, turbidite sediments are present on the sea floor. The continuation of acoustic reflectors from the zone of turbidites in the central areas of the basin into the zone of sediment waves along the margins, and the lithology and structures in sediment cores from these zones suggest that the turbidity-current-fed, fine-grained sediments were deposited as wavy bedforms by AABW flow. Thus, sediment waves formed readily during Pleistocene times. The enrichment of quartz and displaced Antarctic diatoms, and the relatively low kaolinite/chlorite ratios in the sediments, the north-pointing current lineations on the sea floor, the lack of any perceptible sedimentary fill in the troughs of waves, and the dense nepheloid layer in the westerly areas of the Mozambique Basin, attest to the current-controlled sedimentation and generation of wavy bedforms during Holocene time also. The formation of sediment waves in the Mozambique Basin can be modeled after a fluvial antidune mechanism. This model envisages that internal waves, focused on a benthic boundary layer cap, have been locked in phase with sediment waves in the presence of an 8–10 cm/sec current in the Mozambique Basin. A density contrast of 2·10</span><sup>−6</sup><span>&nbsp;g/cm</span><sup>3</sup><span>&nbsp;appears to exist at the tops of benthic boundary layers in the Mozambique Basin and is quite sufficient for supporting the internal waves. The densiometric Froude number calculated for a 60–280 m thick boundary layer in the basin is close to unity or greater, and is compatible with the antidune model.</span></p>","language":"English","publisher":"Elsevier","doi":"10.1016/0025-3227(80)90071-7","usgsCitation":"Kolla, V., Eittreim, S., Sullivan, L., Kostecki, J., and Burckle, L., 1980, Current-controlled, abyssal microtopography and sedimentation in Mozambique Basin, southwest Indian Ocean: Marine Geology, v. 34, no. 3-4, p. 171-206, https://doi.org/10.1016/0025-3227(80)90071-7.","productDescription":"36 p.","startPage":"171","endPage":"206","costCenters":[],"links":[{"id":221938,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"34","issue":"3-4","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059fd1ae4b0c8380cd4e625","contributors":{"authors":[{"text":"Kolla, V.","contributorId":70540,"corporation":false,"usgs":true,"family":"Kolla","given":"V.","email":"","affiliations":[],"preferred":false,"id":363245,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Eittreim, S.","contributorId":74878,"corporation":false,"usgs":true,"family":"Eittreim","given":"S.","affiliations":[],"preferred":false,"id":363246,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Sullivan, L.","contributorId":85327,"corporation":false,"usgs":true,"family":"Sullivan","given":"L.","email":"","affiliations":[],"preferred":false,"id":363247,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kostecki, J.A.","contributorId":23691,"corporation":false,"usgs":true,"family":"Kostecki","given":"J.A.","email":"","affiliations":[],"preferred":false,"id":363244,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Burckle, L.H.","contributorId":16977,"corporation":false,"usgs":true,"family":"Burckle","given":"L.H.","affiliations":[],"preferred":false,"id":363243,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70012174,"text":"70012174 - 1980 - Circular current loops, magnetic dipoles and spherical harmonic analysis.","interactions":[],"lastModifiedDate":"2013-03-14T12:43:03","indexId":"70012174","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2310,"text":"Journal of Geomagnetism & Geoelectricity","active":true,"publicationSubtype":{"id":10}},"title":"Circular current loops, magnetic dipoles and spherical harmonic analysis.","docAbstract":"Spherical harmonic analysis (SHA) is the most used method of describing the Earth's magnetic field, even though spherical harmonic coefficients (SHC) almost completely defy interpretation in terms of real sources. Some moderately successful efforts have been made to represent the field in terms of dipoles placed in the core in an effort to have the model come closer to representing real sources. Dipole sources are only a first approximation to the real sources which are thought to be a very complicated network of electrical currents in the core of the Earth. -Author","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Geomagnetism & Geoelectricity","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","doi":"10.5636/jgg.32.357","issn":"00221392","usgsCitation":"Alldredge, L., 1980, Circular current loops, magnetic dipoles and spherical harmonic analysis.: Journal of Geomagnetism & Geoelectricity, v. 32, no. 6, p. 357-364, https://doi.org/10.5636/jgg.32.357.","startPage":"357","endPage":"364","numberOfPages":"8","costCenters":[],"links":[{"id":480594,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.5636/jgg.32.357","text":"Publisher Index Page"},{"id":269317,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.5636/jgg.32.357"},{"id":221872,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"32","issue":"6","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f602e4b0c8380cd4c548","contributors":{"authors":[{"text":"Alldredge, L.R.","contributorId":53457,"corporation":false,"usgs":true,"family":"Alldredge","given":"L.R.","email":"","affiliations":[],"preferred":false,"id":362925,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70012313,"text":"70012313 - 1980 - Geochemistry, strontium isotope data, and potassium-argon ages of the andesite-rhyolite association in the Padang area, West Sumatra","interactions":[],"lastModifiedDate":"2012-03-12T17:19:07","indexId":"70012313","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2499,"text":"Journal of Volcanology and Geothermal Research","active":true,"publicationSubtype":{"id":10}},"title":"Geochemistry, strontium isotope data, and potassium-argon ages of the andesite-rhyolite association in the Padang area, West Sumatra","docAbstract":"Quaternary volcanoes in the Padang area on the west coast of Sumatra have produced two-pyroxene, calc-alkaline andesite and volumetrically subordinate rhyolitic and andesitic ash-flow tuffs. A sequence of andesite (pre-caldera), rhyolitic tuff and andesitic tuff, in decreasing order of age, is related to Maninjau caldera. Andesite compositions range from 55.0 to 61.2% SiO2 and from 1.13 to 2.05% K2O. Six K-Ar whole-rock age determinations on andesites show a range of 0.27 ?? 0.12 to 0.83 ?? 0.42 m.y.; a single determination on the rhyolitic ashflow tuff gave 0.28 ?? 0.12 m.y. Eight 57Sr/26Sr ratios on andesites and rhyolite tuff west of the Semangko fault zone are in the range 0.7056 - 0.7066. These ratios are higher than those elsewhere in the Sunda arc but are comparable to the Taupo volcanic zone of New Zealand and calc-alkaline volcanics of continental margins. An 87Sr/86Sr ratio of 0.7048 on G. Sirabungan east of the Semangko fault is similar to an earlier determination on nearby G. Marapi (0.7047), and agrees with 87Sr/86Sr ratios in the rest of the Sunda arc. The reason for this distribution of 87Sr/86Sr ratios is unknown. The high 87Sr/86Sr ratios are tentatively regarded to reflect a crustal source for the andesites, while moderately fractionated REE patterns with pronounced negative Eu anomalies suggest a residue enriched in plagioclase with hornblende and/or pyroxenes. Generation of associated andesite and rhyolite could have been caused by hydrous fractional melting of andesite or volcanogenic sediments under adiabatic decompression. ?? 1980.","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Journal of Volcanology and Geothermal Research","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","issn":"03770273","usgsCitation":"Leo, G.W., Hedge, C., and Marvin, R.F., 1980, Geochemistry, strontium isotope data, and potassium-argon ages of the andesite-rhyolite association in the Padang area, West Sumatra: Journal of Volcanology and Geothermal Research, v. 7, no. 1-2, p. 139-156.","startPage":"139","endPage":"156","numberOfPages":"18","costCenters":[],"links":[{"id":221939,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"7","issue":"1-2","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a172de4b0c8380cd553f5","contributors":{"authors":[{"text":"Leo, G. W.","contributorId":102899,"corporation":false,"usgs":true,"family":"Leo","given":"G.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":363250,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hedge, C. E.","contributorId":73611,"corporation":false,"usgs":true,"family":"Hedge","given":"C. E.","affiliations":[],"preferred":false,"id":363249,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Marvin, R. F.","contributorId":60597,"corporation":false,"usgs":true,"family":"Marvin","given":"R.","middleInitial":"F.","affiliations":[],"preferred":false,"id":363248,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70012171,"text":"70012171 - 1980 - Distribution of modern benthic foraminifers on the New Jersey Outer Continental Shelf","interactions":[],"lastModifiedDate":"2019-12-04T06:43:07","indexId":"70012171","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":2673,"text":"Marine Micropaleontology","active":true,"publicationSubtype":{"id":10}},"title":"Distribution of modern benthic foraminifers on the New Jersey Outer Continental Shelf","docAbstract":"<p>We used samples from 21 stations within a 600 km2 area of the New Jersey Outer Continental Shelf to assess the effects of a hydrodynamic environment on the distribution and redistribution of benthic foraminifers. These samples show that, although the predominant genera (Elphidium, Cibicides, and Saccammina) are the same as those reported by other investigators for this region, the environmental factors that control the generic distribution are more complex than were previously postulated. Generic distribution patterns derived from this study are correlated with the bottom topography and sediment distribution as well as the temperature, salinity, and dissolved oxygen concentrations of the bottom waters. The six predominant species observed in the samples (and their phenotypic variants) are cryophilic forms known to occur in the Virginian and Nova Scotian biogeographic provinces and in Arctic waters. Species distribution patterns also correlate well with bottom topography and hydrographic factors, but may be modified by seasonal fluctuations in test production and by redistribution of dead tests. At most stations, specimens of Elphidium subarcticum were attached to quartz grains. This phenomenon, which has not been reported before, probably is an adaptation to a high-energy environment. The distribution pattern of Elphidium subarcticum along with those of the sessile species Webbinella concava and Vasiglobulina n.sp. corroborate sedimentological evidence that the accumulation of modern sediments in the area is negligible.&nbsp;</p>","language":"English","publisher":"Elsevier","doi":"10.1016/0377-8398(80)90006-7","issn":"03778398","usgsCitation":"Poag, C.W., Knebel, H., and Todd, R., 1980, Distribution of modern benthic foraminifers on the New Jersey Outer Continental Shelf: Marine Micropaleontology, v. 5, no. C, p. 43-69, https://doi.org/10.1016/0377-8398(80)90006-7.","productDescription":"27 p. 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Wylie","contributorId":52714,"corporation":false,"usgs":true,"family":"Poag","given":"C.","email":"","middleInitial":"Wylie","affiliations":[],"preferred":false,"id":362919,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Knebel, H.J.","contributorId":79092,"corporation":false,"usgs":true,"family":"Knebel","given":"H.J.","affiliations":[],"preferred":false,"id":362921,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Todd, R.","contributorId":77654,"corporation":false,"usgs":true,"family":"Todd","given":"R.","email":"","affiliations":[],"preferred":false,"id":362920,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70012160,"text":"70012160 - 1980 - Comment on 'A reinterpretation of the linear heat flow and heat production relationship for the exponential model of the heat production in the crust' by R.N. Singh & J.G. Negi.","interactions":[],"lastModifiedDate":"2013-03-12T11:30:06","indexId":"70012160","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","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":"Comment on 'A reinterpretation of the linear heat flow and heat production relationship for the exponential model of the heat production in the crust' by R.N. Singh & J.G. Negi.","docAbstract":"In their recent paper, Singh & Negi, (This journal, 57, 741-744) contend that if thd slope of the empirical linear relation between heat flow and heat production is interpreted as the decay-length of an exponential depth-distribution of sources, a discrepancy rises, whereas if it is interpreted as the depth of a step distribution, it does not. I should like to point out that their discrepancy follows from their arbitrary assumption of one of a range of physical possibilities unconstrained by the observations; with an equally valid alternate assumption (Lachenbruch 1970) the discrepancy disappears. In any case such discrepancies are probably minor compared to physical difficulties that arise from the step model, and to uncertainties introduced by other assumptions in any simple model.-Author","largerWorkType":{"id":2,"text":"Article"},"largerWorkTitle":"Geophysical Journal of the Royal Astronomical Society","largerWorkSubtype":{"id":10,"text":"Journal Article"},"language":"English","publisher":"Wiley","doi":"10.1111/j.1365-246X.1980.tb02653.x","usgsCitation":"Lachenbruch, A., 1980, Comment on 'A reinterpretation of the linear heat flow and heat production relationship for the exponential model of the heat production in the crust' by R.N. Singh & J.G. Negi.: Geophysical Journal of the Royal Astronomical Society, v. 63, no. 3, p. 791-795, https://doi.org/10.1111/j.1365-246X.1980.tb02653.x.","startPage":"791","endPage":"795","numberOfPages":"5","costCenters":[],"links":[{"id":480591,"rank":1,"type":{"id":40,"text":"Open Access Publisher Index Page"},"url":"https://doi.org/10.1111/j.1365-246x.1980.tb02653.x","text":"Publisher Index Page"},{"id":222700,"rank":0,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"},{"id":269145,"type":{"id":10,"text":"Digital Object Identifier"},"url":"https://dx.doi.org/10.1111/j.1365-246X.1980.tb02653.x"}],"volume":"63","issue":"3","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5059f7ece4b0c8380cd4cda6","contributors":{"authors":[{"text":"Lachenbruch, A.H.","contributorId":76737,"corporation":false,"usgs":true,"family":"Lachenbruch","given":"A.H.","affiliations":[],"preferred":false,"id":362886,"contributorType":{"id":1,"text":"Authors"},"rank":1}]}}
,{"id":70012626,"text":"70012626 - 1980 - Rare earth element distribution in some hydrothermal minerals: Evidence for crystallographic control","interactions":[],"lastModifiedDate":"2024-03-14T15:56:58.831834","indexId":"70012626","displayToPublicDate":"1980-01-01T00:00:00","publicationYear":"1980","noYear":false,"publicationType":{"id":2,"text":"Article"},"publicationSubtype":{"id":10,"text":"Journal Article"},"seriesTitle":{"id":1759,"text":"Geochimica et Cosmochimica Acta","active":true,"publicationSubtype":{"id":10}},"title":"Rare earth element distribution in some hydrothermal minerals: Evidence for crystallographic control","docAbstract":"<p>Rare earth element (REE) abundances were measured by neutron activation analysis in anhydrite (CaSO<sub>4</sub>), barite (BaSO<sub>4</sub>), siderite (FeCO<sub>3</sub>) and galena (PbS). A simple crystal-chemical model qualitatively describes the relative affinities for REE substitution in anhydrite, barite, and siderite. When normalized to ‘crustal’ abundances (as an approximation to the hydrothermal fluid REE pattern), log REE abundance is a surprisingly linear function of (ionic radius of major cation—ionic radius of REE)<sup>2</sup><span>&nbsp;</span>for the three hydrothermal minerals, individually and collectively. An important exception, however, is Eu, which is anomalously enriched in barite and depleted in siderite relative to REE of neighboring atomic number and trivalent ionic radius. In principle, REE analyses of suitable pairs of co-existing hydrothermal minerals, combined with appropriate experimental data, could yield both the REE content and the temperature of the parental hydrothermal fluid.</p><p>The REE have only very weak chalcophilic tendencies, and this is reflected by the very low abundances in galena—La, 0.6 ppb; Sm, 0.06 ppb; the remainder are below detection limits.</p>","language":"English","publisher":"Elsevier","doi":"10.1016/0016-7037(80)90286-0","issn":"00167037","usgsCitation":"Morgan, J.W., and Wandless, G., 1980, Rare earth element distribution in some hydrothermal minerals: Evidence for crystallographic control: Geochimica et Cosmochimica Acta, v. 44, no. 7, p. 973-980, https://doi.org/10.1016/0016-7037(80)90286-0.","productDescription":"8 p.","startPage":"973","endPage":"980","numberOfPages":"8","costCenters":[],"links":[{"id":222603,"rank":1,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/outside_thumb.jpg"}],"volume":"44","issue":"7","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"505a951ae4b0c8380cd817e2","contributors":{"authors":[{"text":"Morgan, J. W.","contributorId":92384,"corporation":false,"usgs":true,"family":"Morgan","given":"J.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":364091,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wandless, G.A.","contributorId":107716,"corporation":false,"usgs":true,"family":"Wandless","given":"G.A.","affiliations":[],"preferred":false,"id":364092,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
]}