{"pageNumber":"177","pageRowStart":"4400","pageSize":"25","recordCount":37001,"records":[{"id":70074763,"text":"ofr20071047SRP030 - 2007 - Geology of the Byrd Glacier Discontinuity (Ross Orogen): New survey data from the Britannia Range, Antarctica","interactions":[],"lastModifiedDate":"2014-02-03T14:27:57","indexId":"ofr20071047SRP030","displayToPublicDate":"2007-01-01T14:14:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-030","title":"Geology of the Byrd Glacier Discontinuity (Ross Orogen): New survey data from the Britannia Range, Antarctica","docAbstract":"Field activities in the Britannia Range (Transantarctic Mountains, Antarctica) highlighted new geological \nfeatures around the so-called Byrd Glacier discontinuity. Recent field surveys revealed the occurrence of significant \namounts of medium- to high-grade metamorphic rocks, intruded by abundant coarse-grained porphyritic granitoids. \nMost of the granitoids are deformed, with foliation parallel to the regional foliation in the metamorphics. Two main \nepisodes of deformation are observed. Tight to isoclinal folds and penetrative axial plane foliation are related to the D1 \nphase, open folds to the D2. The main foliation (D1) trends nearly E-W in agreement with the trend in the southern \nportion of the Byrd Glacier. In most outcrops, granitic dykes are folded and stretched by the D2 deformation, which \nshows similar characteristics with the D2 deformation south of the Byrd Glacier. This suggests the occurrence in the \nRoss orogen of an orogen-normal structure south and north of the Byrd Glacier.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP030","usgsCitation":"Carosi, R., Giacomini, F., Talarico, F., and Stump, E., 2007, Geology of the Byrd Glacier Discontinuity (Ross Orogen): New survey data from the Britannia Range, Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-030, 6 p., https://doi.org/10.3133/ofr20071047SRP030.","productDescription":"6 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":281911,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp030/of2007-1047srp030.pdf"},{"id":281913,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP030.JPG"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 180.0,-90.0 ], [ 180.0,-60.0 ], [ -180.0,-60.0 ], [ -180.0,-90.0 ], [ 180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd5e31e4b0b290850fb87a","contributors":{"authors":[{"text":"Carosi, R.","contributorId":24681,"corporation":false,"usgs":true,"family":"Carosi","given":"R.","email":"","affiliations":[],"preferred":false,"id":489842,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Giacomini, F.","contributorId":22241,"corporation":false,"usgs":true,"family":"Giacomini","given":"F.","email":"","affiliations":[],"preferred":false,"id":489841,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Talarico, F.","contributorId":84585,"corporation":false,"usgs":true,"family":"Talarico","given":"F.","email":"","affiliations":[],"preferred":false,"id":489844,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Stump, E.","contributorId":63303,"corporation":false,"usgs":true,"family":"Stump","given":"E.","email":"","affiliations":[],"preferred":false,"id":489843,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70100446,"text":"ofr20071047SRP081 - 2007 - Paleobotany of Livingston Island: The first report of a Cretaceous fossil flora from Hannah Point","interactions":[],"lastModifiedDate":"2014-04-01T14:29:50","indexId":"ofr20071047SRP081","displayToPublicDate":"2007-01-01T14:13:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-081","title":"Paleobotany of Livingston Island: The first report of a Cretaceous fossil flora from Hannah Point","docAbstract":"This is the first report of a fossil flora from Hannah Point, Livingston Island, South Shetland Islands, \nAntarctica. The fossiliferous content of an outcrop, located between two igneous rock units of Cretaceous age are \nmainly composed of leaf imprints and some fossil trunks. The leaf assemblage consists of 18 taxa of Pteridophyta, \nPinophyta and one angiosperm. The plant assemblage can be compared to other Early Cretaceous floras from the South \nShetland Islands, but several taxa have an evidently Late Cretaceous affinity. A Coniacian-Santonian age is the most \nprobable age for the outcrops, supported by previous K/Ar isotopic studies of the basalts over and underlying the \nfossiliferous sequence","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP081","usgsCitation":"Leppe, M., Michea, W., Munoz, C., Palma-Heldt, S., and Fernandoy, F., 2007, Paleobotany of Livingston Island: The first report of a Cretaceous fossil flora from Hannah Point: U.S. Geological Survey Open-File Report 2007-1047-SRP-081, 4 p., https://doi.org/10.3133/ofr20071047SRP081.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":285237,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP081.JPG"},{"id":285236,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp081/of2007-1047srp081.pdf"}],"otherGeospatial":"Antarctica;Hannah Point","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -60.620670,-62.657590 ], [ -60.620670,-62.631244 ], [ -60.540676,-62.631244 ], [ -60.540676,-62.657590 ], [ -60.620670,-62.657590 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"535594e7e4b0120853e8c0c9","contributors":{"authors":[{"text":"Leppe, M.","contributorId":41742,"corporation":false,"usgs":true,"family":"Leppe","given":"M.","email":"","affiliations":[],"preferred":false,"id":492223,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Michea, W.","contributorId":38898,"corporation":false,"usgs":true,"family":"Michea","given":"W.","email":"","affiliations":[],"preferred":false,"id":492222,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Munoz, C.","contributorId":107612,"corporation":false,"usgs":true,"family":"Munoz","given":"C.","email":"","affiliations":[],"preferred":false,"id":492224,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Palma-Heldt, S.","contributorId":35648,"corporation":false,"usgs":true,"family":"Palma-Heldt","given":"S.","email":"","affiliations":[],"preferred":false,"id":492221,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Fernandoy, F.","contributorId":23438,"corporation":false,"usgs":true,"family":"Fernandoy","given":"F.","email":"","affiliations":[],"preferred":false,"id":492220,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70094759,"text":"ofr20071047SRP063 - 2007 - The Cambrian Ross Orogeny in northern Victoria Land (Antarctica) and New Zealand: A synthesis","interactions":[],"lastModifiedDate":"2014-02-24T15:30:27","indexId":"ofr20071047SRP063","displayToPublicDate":"2007-01-01T14:06:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-063","title":"The Cambrian Ross Orogeny in northern Victoria Land (Antarctica) and New Zealand: A synthesis","docAbstract":"In the Cambrian, the paleo-Pacific margin of the Gondwana supercontinent included East Antarctica, \nAustralia, Tasmania and New Zealand and was affected by themajor Ross-Delamerian Orogeny. In Antarctica, \nevidence suggests that this resulted from oblique subduction and that in northern Victoria Land it was accompanied by \nthe opening and subsequent closure of a back-arc basin. Comparison of the type and timing of sedimentary, magmatic \nand metamorphic events in areas noted above shows strong similarities between northern Victoria Land and New \nZealand. In both regions Middle Cambrian volcanites are interpreted as arc/back-arc assemblages produced by west-directed subduction; sediments interbedded with the volcanites show provenance both from the arc and from the \nGondwana margin and therefore place the basin close to the continent. Back-arc closure in the Late Cambrian was \nlikely accomplished through a second subduction system","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP063","usgsCitation":"Federico, L., Capponi, G., Crispini, L., and Bradshaw, J., 2007, The Cambrian Ross Orogeny in northern Victoria Land (Antarctica) and New Zealand: A synthesis: U.S. Geological Survey Open-File Report 2007-1047-SRP-063, 5 p., https://doi.org/10.3133/ofr20071047SRP063.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":282710,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP063.png"},{"id":282704,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp063/of2007-1047srp063.pdf"}],"otherGeospatial":"Antarctica;Victoria Land","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 149.96,-79.11 ], [ 149.96,-70.28 ], [ 170.34,-70.28 ], [ 170.34,-79.11 ], [ 149.96,-79.11 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd76d2e4b0b2908510b270","contributors":{"authors":[{"text":"Federico, L.","contributorId":71878,"corporation":false,"usgs":true,"family":"Federico","given":"L.","email":"","affiliations":[],"preferred":false,"id":490876,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Capponi, G.","contributorId":85498,"corporation":false,"usgs":true,"family":"Capponi","given":"G.","email":"","affiliations":[],"preferred":false,"id":490877,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Crispini, L.","contributorId":41734,"corporation":false,"usgs":true,"family":"Crispini","given":"L.","email":"","affiliations":[],"preferred":false,"id":490874,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bradshaw, J.D.","contributorId":48324,"corporation":false,"usgs":true,"family":"Bradshaw","given":"J.D.","email":"","affiliations":[],"preferred":false,"id":490875,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70094193,"text":"ofr20071047SRP055 - 2007 - Break-up of Gondwana and opening of the South Atlantic: Review of existing plate tectonic models","interactions":[],"lastModifiedDate":"2014-02-18T14:14:41","indexId":"ofr20071047SRP055","displayToPublicDate":"2007-01-01T14:05:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-055","title":"Break-up of Gondwana and opening of the South Atlantic: Review of existing plate tectonic models","docAbstract":"The opening history of both the Weddell Sea and South Atlantic Ocean is critical to understanding the break-\nup of Gondwana and the evolution of Antarctica since Early Jurassic times. The dispersal of the Gondwanide fragments\nis important to understanding the development of past ocean circulation. Unfortunately the tectonics of the Weddell Sea\nregion is difficult to resolve because of the paucity of data coverage and the region’s inherent complexity. Although\nconsiderable progress has been achieved in the past 20 years with new marine aeromagnetic data and satellite derived\ngravity anomaly maps, there are still several models in consideration which differ in crustal ages and schemes of opening. In this paper we present a review of four of those models. Focusing on poles of rotation, synthetic isochrons and\nflowlines, we proceed backward in time beginning at Chron 34 (83.5 Ma), as it is relatively well defined ocean wide,\nand present crustal age maps that display the estimated trace of the South America-Antarctica-Africa triple junction for\neach model. We also plot reconstructions at four selected epochs for all models using the same projection and scale to facilitate comparison. The diverse simplifying assumptions that need to be made in every case regarding plate fragmentation to account for the numerous syn-rift basins and periods of stretching are strong indicators that rigid plate tectonics is too simple a model for the present problem.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP055","usgsCitation":"Ghidella, M., Lawver, L., and Gahagan, L., 2007, Break-up of Gondwana and opening of the South Atlantic: Review of existing plate tectonic models: U.S. Geological Survey Open-File Report 2007-1047-SRP-055, 5 p., https://doi.org/10.3133/ofr20071047SRP055.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":282490,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp055/of2007-1047srp055.pdf"},{"id":282492,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP055.JPG"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 180.0,-90.0 ], [ 180.0,-60.0 ], [ -180.0,-60.0 ], [ -180.0,-90.0 ], [ 180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd4fcae4b0b290850f2ee5","contributors":{"authors":[{"text":"Ghidella, M.E.","contributorId":37645,"corporation":false,"usgs":true,"family":"Ghidella","given":"M.E.","email":"","affiliations":[],"preferred":false,"id":490547,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Lawver, L.A.","contributorId":73599,"corporation":false,"usgs":true,"family":"Lawver","given":"L.A.","email":"","affiliations":[],"preferred":false,"id":490548,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gahagan, L.M.","contributorId":15112,"corporation":false,"usgs":true,"family":"Gahagan","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":490546,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70093615,"text":"ofr20071047SRP038 - 2007 - Solubility of TiO<sub>2</sub> in garnet and orthopyroxene: Ti thermometer for ultrahigh-temperature granulites","interactions":[],"lastModifiedDate":"2014-02-10T15:00:23","indexId":"ofr20071047SRP038","displayToPublicDate":"2007-01-01T14:03:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-038","title":"Solubility of TiO<sub>2</sub> in garnet and orthopyroxene: Ti thermometer for ultrahigh-temperature granulites","docAbstract":"We report the TiO<sub>2</sub> solubility in garnet and orthopyroxene coexisting with rutile calibrated from experimental data at pressures 7–20 kbar and temperatures 850–1300°C in two Antarctic granulite systems.The Ti would substitute for the tetrahedral Si, whereas we could not find positive evidence of the coupled substitution of M-Ti (M is Mg or Fe) for Al-Al in octahedral sites as well as the interstitial substitution of \u0003-Ti (\u0003 is avacancy)\nfor M-M in triangular-dodecahedral sites of garnet at ultrahigh-temperature (UHT) metamorphicconditions.The TiO<sub>2</sub> content of garnet increases with temperature and decreases with pressure. In orthopyroxene Ti substitutes for atoms in the tetrahedral and octahedralsites.The Ti content of orthopyroxene increases with temperature and\nincreases with pressure.Titanium solubility in garnet and orthopyroxene is not so sensitive to pressure change as\ncompared with temperature dependence given by following empirical equations: ln (X <sup>Grt;IV</sup><sub>Ti</sub>/X<sup>Grt;IV</sup><sub>Si</sub>)= -15366/T +5.962 and ln ( X<sup>Opx;IV</sup>\n<sub>Ti</sub>/X<sup>Opx;IV</sup><sub>Si</sub>)=-11367=T +3.107 where X is the mole fraction of Ti or Si on the tetrahedral sites and temperature is given in Kelvin.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP038","usgsCitation":"Kawasaki, T., and Motoyoshi, Y., 2007, Solubility of TiO<sub>2</sub> in garnet and orthopyroxene: Ti thermometer for ultrahigh-temperature granulites: U.S. Geological Survey Open-File Report 2007-1047-SRP-038, 4 p., https://doi.org/10.3133/ofr20071047SRP038.","productDescription":"4 p.","costCenters":[],"links":[{"id":282231,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP038.JPG"},{"id":282230,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp038/of2007-1047srp038.pdf"}],"noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd7336e4b0b29085108cce","contributors":{"authors":[{"text":"Kawasaki, Toshisuke","contributorId":53289,"corporation":false,"usgs":true,"family":"Kawasaki","given":"Toshisuke","email":"","affiliations":[],"preferred":false,"id":490086,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Motoyoshi, Yoichi","contributorId":83440,"corporation":false,"usgs":true,"family":"Motoyoshi","given":"Yoichi","email":"","affiliations":[],"preferred":false,"id":490087,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70074759,"text":"ofr20071047SRP029 - 2007 - Sea ice concentration temporal variability over the Weddell Sea and its relationship with tropical sea surface temperature","interactions":[],"lastModifiedDate":"2014-02-03T14:09:17","indexId":"ofr20071047SRP029","displayToPublicDate":"2007-01-01T14:01:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-029","title":"Sea ice concentration temporal variability over the Weddell Sea and its relationship with tropical sea surface temperature","docAbstract":"Principal Components Analysis (PCA) in S-Mode (correlation between temporal series) was performed on \nsea ice monthly anomalies, in order to investigate which are the main temporal patterns, where are the homogenous \nareas located and how are they related to the sea surface temperature (SST). This analysis provides 9 patterns (4 in the \nAmundsen and Bellingshausen Seas and 5 in the Weddell Sea) that represent the most important temporal features that \ndominated sea ice concentration anomalies (SICA) variability in the Weddell, Amundsen and Bellingshausen Seas over \nthe 1979-2000 period. Monthly Polar Gridded Sea Ice Concentrations data set derived from satellite information \ngenerated by NASA Team algorithm and acquired from the National Snow and Ice Data Center (NSIDC) were used. \nMonthly means SST are provided by the National Center for Environmental Prediction reanalysis. The first temporal \npattern series obtained by PCA has its homogeneous area located at the external region of the Weddell and \nBellingshausen Seas and Drake Passage, mostly north of 60°S. The second region is centered in 30°W and located at the \nsoutheast of the Weddell. The third area is localized east of 30°W and north of 60°S. South of the first area, the fourth \nPC series has its homogenous region, between 30° and 60°W. The last area is centered at 0° W and south of 60°S. \nCorrelation charts between the five Principal Components series and SST were performed. Positive correlations over the \nTropical Pacific Ocean were found for the five PCs when SST series preceded SICA PC series. The sign of the \ncorrelation could relate the occurrence of an El Niño/Southern Oscillation (ENSO) warm (cold) event with posterior \npositive (negative) anomalies of sea ice concentration over the Weddell Sea.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP029","usgsCitation":"Barreira, S., and Compagnucci, R., 2007, Sea ice concentration temporal variability over the Weddell Sea and its relationship with tropical sea surface temperature: U.S. Geological Survey Open-File Report 2007-1047-SRP-029, 5 p., https://doi.org/10.3133/ofr20071047SRP029.","productDescription":"5 p.","onlineOnly":"N","costCenters":[],"links":[{"id":281910,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP029.JPG"},{"id":281909,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp029/of2007-1047srp029.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 180.0,-90.0 ], [ 180.0,-60.0 ], [ -180.0,-60.0 ], [ -180.0,-90.0 ], [ 180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd7196e4b0b29085107c3f","contributors":{"authors":[{"text":"Barreira, S.","contributorId":28167,"corporation":false,"usgs":true,"family":"Barreira","given":"S.","email":"","affiliations":[],"preferred":false,"id":489837,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Compagnucci, R.","contributorId":21068,"corporation":false,"usgs":true,"family":"Compagnucci","given":"R.","email":"","affiliations":[],"preferred":false,"id":489836,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70100445,"text":"ofr20071047SRP080 - 2007 - Silicified wood from the Permian and Triassic of Antarctica: Tree rings from polar paleolatitudes","interactions":[],"lastModifiedDate":"2014-04-01T14:11:55","indexId":"ofr20071047SRP080","displayToPublicDate":"2007-01-01T14:00:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-080","title":"Silicified wood from the Permian and Triassic of Antarctica: Tree rings from polar paleolatitudes","docAbstract":"The mass extinction at the Permian-Triassic boundary produced a floral turnover in Gondwana in which \nPaleozoic seed ferns belonging to the Glossopteridales were replaced by corystosperm seed ferns and other seed plant \ngroups in the Mesozoic. Secondary growth (wood production) in both plant groups provides information on plant \ngrowth in relation to environment in the form of permineralized tree rings. Techniques utilized to analyze extant wood \ncan be used on fossil specimens to better understand the climate from both of these periods. Late Permian and early \nMiddle Triassic tree rings from the Beardmore Glacier area indicate an environment where extensive plant growth \noccurred at polar latitudes (~80–85°S, Permian; ~75°S, Triassic). A rapid transition to dormancy in both the Permian \nand Triassic woods suggests a strong influence of the annual light/dark cycle within the Antarctic Circle on ring \nproduction. Latewood production in each ring was most likely triggered by the movement of the already low-angled sun \nbelow the horizon. The plants which produced the wood have been reconstructed as seasonally deciduous, based on \nstructural and sedimentologic evidence. Although the Late Permian climate has been reconstructed as cold temperate \nand the Middle Triassic as a greenhouse, these differences are not reflected in tree ring anatomy or wood production in \nthese plant fossils from the central Transantarctic Mountains.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP080","usgsCitation":"Ryberg, P., and Taylor, E., 2007, Silicified wood from the Permian and Triassic of Antarctica: Tree rings from polar paleolatitudes: U.S. Geological Survey Open-File Report 2007-1047-SRP-080, 5 p., https://doi.org/10.3133/ofr20071047SRP080.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":285233,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP080.JPG"},{"id":285232,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp080/of2007-1047srp080.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53559562e4b0120853e8c1e3","contributors":{"authors":[{"text":"Ryberg, P.E.","contributorId":7188,"corporation":false,"usgs":true,"family":"Ryberg","given":"P.E.","email":"","affiliations":[],"preferred":false,"id":492218,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Taylor, E.L.","contributorId":98219,"corporation":false,"usgs":true,"family":"Taylor","given":"E.L.","email":"","affiliations":[],"preferred":false,"id":492219,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70101089,"text":"ofr20071047SRP095 - 2007 - High resolution stable isotope and carbonate variability during the early Oligocene climate transition: Walvis Ridge (ODP Site 1263)","interactions":[],"lastModifiedDate":"2014-04-28T14:23:46","indexId":"ofr20071047SRP095","displayToPublicDate":"2007-01-01T13:58:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-095","title":"High resolution stable isotope and carbonate variability during the early Oligocene climate transition: Walvis Ridge (ODP Site 1263)","docAbstract":"The rapid global increase in benthic foraminiferal &delta;18O in the early Oligocene (~33.6 Ma) has been taken to imply the first appearance of large, permanent ice sheets on Antarctica, possibly coupled to deep sea cooling and/or Northern Hemisphere ice growth. This oxygen isotope shift is accompanied by a reorganization of the global carbon cycle, identified by a &delta;13C increase that slightly lags the glacially-mediated &delta;18O transition. Here, we present a new\nrecord of the early Oligocene climate transition from the subtropical South Atlantic Ocean. To investigate climatic and carbon cycle variability in the transition from the early Paleogene “greenhouse” into the Oligocene “icehouse” world,\nwe have developed carbonate content, coarse fraction, and benthic foraminiferal carbon and oxygen stable isotope records for the earliest Oligocene at Ocean Drilling Program (ODP) Site 1263. These records represent the highest-\nresolution reconstruction of the Eocene/Oligocene from the Atlantic basin to date, and provide us with a unique opportunity to investigate the fine-scale interplay of glaciation and the global carbon cycle.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP095","usgsCitation":"U.S. Geological Survey, 2007, High resolution stable isotope and carbonate variability during the early Oligocene climate transition: Walvis Ridge (ODP Site 1263): U.S. Geological Survey Open-File Report 2007-1047-SRP-095, 7 p., https://doi.org/10.3133/ofr20071047SRP095.","productDescription":"7 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":286734,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP095.JPG"},{"id":286733,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp095/of2007-1047srp095.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"535f786ee4b078dca33ae375"}
,{"id":70103171,"text":"ofr20071047SRP102 - 2007 - Triassic-Jurassic sediments and multiple volcanic events in North Victoria Land, Antarctica: A revised stratigraphic model","interactions":[],"lastModifiedDate":"2014-04-29T14:11:58","indexId":"ofr20071047SRP102","displayToPublicDate":"2007-01-01T13:55:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-102","title":"Triassic-Jurassic sediments and multiple volcanic events in North Victoria Land, Antarctica: A revised stratigraphic model","docAbstract":"Field investigations in North Victoria Land, Antarctica during GANOVEX IX (2005/2006) allow the \nrevision of the Triassic-Jurassic stratigraphy of ~300 m thick continental deposits in between the crystalline basement \nand the Kirkpatrick lava flows of the Ferrar Group. The lower stratigraphic unit (Section Peak Formation) is \ncharacterised by braided river-type quartzose sandstone deposits with intercalations of shale and coal occurring at the \ntop. It is overlain by a homogeneous unit of reworked tuffs composed of fine-grained silicic shards, quartz and feldspar \n(new name: \"Shafer Peak Formation\"). These deposits can be correlated with parts of the Hanson Formation in the \nCentral Transantarctic Mountains and require a distal yet unknown source of massive silicic volcanism. Clastic products \nof mafic volcanic eruptions, formerly described as a separate stratigraphic formation (Exposure Hill Formation), occur \nwithin local diatreme structures as well as intercalated at various stratigraphic levels within the sedimentary succession. \nThese dominantly hydroclastic eruptions are the first subaerial expression of Ferrar magmatism. The initial Kirkpatrick \nlavas/pillow lavas were generated from local eruptive centres and again may be overlain by thin sediments, which are \ncovered by the thick plateau lava succession known throughout the Transantarctic Mountain Range.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP102","usgsCitation":"Schoner, R., Viereck-Goette, L., Schneider, J., and Bomfleur, B., 2007, Triassic-Jurassic sediments and multiple volcanic events in North Victoria Land, Antarctica: A revised stratigraphic model: U.S. Geological Survey Open-File Report 2007-1047-SRP-102, 5 p., https://doi.org/10.3133/ofr20071047SRP102.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":286777,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP102.JPG"},{"id":286776,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp102/of2007-1047srp102.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5360c9fee4b082a3ecf53e44","contributors":{"authors":[{"text":"Schoner, R.","contributorId":97004,"corporation":false,"usgs":true,"family":"Schoner","given":"R.","email":"","affiliations":[],"preferred":false,"id":493196,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Viereck-Goette, L.","contributorId":37641,"corporation":false,"usgs":true,"family":"Viereck-Goette","given":"L.","email":"","affiliations":[],"preferred":false,"id":493193,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Schneider, J.","contributorId":85546,"corporation":false,"usgs":true,"family":"Schneider","given":"J.","email":"","affiliations":[],"preferred":false,"id":493195,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Bomfleur, B.","contributorId":54116,"corporation":false,"usgs":true,"family":"Bomfleur","given":"B.","email":"","affiliations":[],"preferred":false,"id":493194,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70068872,"text":"ofr20071047SRP011 - 2007 - SCIAMACHY’s View of the Polar Atmosphere","interactions":[],"lastModifiedDate":"2014-01-13T13:58:25","indexId":"ofr20071047SRP011","displayToPublicDate":"2007-01-01T13:48:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-011","title":"SCIAMACHY’s View of the Polar Atmosphere","docAbstract":"The instrument SCIAMACHY onboard the European ENVISAT mission provides unique capabilities for \nderiving atmospheric geophysical parameters. Since its launch in early 2002 it has operated successfully in orbit. Due to \nENVISAT’s high inclination orbit the polar regions are monitored continuously. We report here results about the status \nof the polar atmosphere in the past 5 years with special emphasis on the southern hemisphere. This part of the \natmosphere is considered to be highly sensitive to anthropogenic impacts on the Earth system and thus to climate \nchange. The acquired data permit retrieving information on the Earth’s atmosphere from troposphere up to the \nmesosphere","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP011","usgsCitation":"Gottwald, M., Krieg, E., von Savigny, C., Noel, S., Reichl, A., Bovensmann, H., and Burrows, J., 2007, SCIAMACHY’s View of the Polar Atmosphere: U.S. Geological Survey Open-File Report 2007-1047-SRP-011, 4 p., https://doi.org/10.3133/ofr20071047SRP011.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":280901,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP011.JPG"},{"id":280900,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp011/of2007-1047srp011.pdf"}],"geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd713ae4b0b290851078a1","contributors":{"authors":[{"text":"Gottwald, M.","contributorId":90637,"corporation":false,"usgs":true,"family":"Gottwald","given":"M.","email":"","affiliations":[],"preferred":false,"id":488164,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Krieg, E.","contributorId":15929,"corporation":false,"usgs":true,"family":"Krieg","given":"E.","email":"","affiliations":[],"preferred":false,"id":488159,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"von Savigny, C.","contributorId":62137,"corporation":false,"usgs":true,"family":"von Savigny","given":"C.","email":"","affiliations":[],"preferred":false,"id":488161,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Noel, S.","contributorId":80582,"corporation":false,"usgs":true,"family":"Noel","given":"S.","email":"","affiliations":[],"preferred":false,"id":488162,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Reichl, A.","contributorId":30139,"corporation":false,"usgs":true,"family":"Reichl","given":"A.","email":"","affiliations":[],"preferred":false,"id":488160,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Bovensmann, H.","contributorId":91015,"corporation":false,"usgs":true,"family":"Bovensmann","given":"H.","email":"","affiliations":[],"preferred":false,"id":488165,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Burrows, J.P.","contributorId":85879,"corporation":false,"usgs":true,"family":"Burrows","given":"J.P.","email":"","affiliations":[],"preferred":false,"id":488163,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70074756,"text":"ofr20071047SRP028 - 2007 - Crustal structure and evolution of the Mawson Sea, western Wilkes Land margin, East Antarctica","interactions":[],"lastModifiedDate":"2014-02-03T13:54:13","indexId":"ofr20071047SRP028","displayToPublicDate":"2007-01-01T13:46:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-028","title":"Crustal structure and evolution of the Mawson Sea, western Wilkes Land margin, East Antarctica","docAbstract":"Thisstudy is based on about 4000 km of MCS, magnetic and gravity data as well as 10 sonobuoys collected\nby the 2005 Russian Antarctic Expedition in the Mawson Sea and adjacent Australian-Antarctic basin between 102°E \nand 115°E. Major identified tectonic provinces and features of the study region include: 1) A marginal rift about 300 km \nwide which developed as a result of extreme crustal extension and unroofing of the upper mantle, and 2) An oceanic \nbasin with the crust of not older than 81 Ma, which is characterized by ultraslow sea-floorspreading ratesranging from\n3 to 11 mm/yr. Three major unconformities are identified in the sedimentary cover of the Mawson Sea and are \ninterpreted to be caused by break-up between Australia and Antarctica at about 81 Ma ago (WL1), the first arrival of the \nice sheet to the Mawson Sea (WL3) and continental scale glaciation at about 34 Ma ago (WL4).","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP028","usgsCitation":"Leitchenkov, G., Gandyukhin, V., Guseva, Y.B., and Kazankov, A.Y., 2007, Crustal structure and evolution of the Mawson Sea, western Wilkes Land margin, East Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-028, 4 p., https://doi.org/10.3133/ofr20071047SRP028.","productDescription":"4 p.","numberOfPages":"4","costCenters":[],"links":[{"id":281904,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP028.JPG"},{"id":281903,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp028/of2007-1047srp028.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 180.0,-90.0 ], [ 180.0,-60.0 ], [ -180.0,-60.0 ], [ -180.0,-90.0 ], [ 180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd5384e4b0b290850f5337","contributors":{"authors":[{"text":"Leitchenkov, G.L.","contributorId":70126,"corporation":false,"usgs":true,"family":"Leitchenkov","given":"G.L.","email":"","affiliations":[],"preferred":false,"id":489825,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Gandyukhin, V.V.","contributorId":35081,"corporation":false,"usgs":true,"family":"Gandyukhin","given":"V.V.","email":"","affiliations":[],"preferred":false,"id":489822,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Guseva, Yu. B.","contributorId":67803,"corporation":false,"usgs":true,"family":"Guseva","given":"Yu.","email":"","middleInitial":"B.","affiliations":[],"preferred":false,"id":489824,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Kazankov, A. Yu","contributorId":38061,"corporation":false,"usgs":true,"family":"Kazankov","given":"A.","email":"","middleInitial":"Yu","affiliations":[],"preferred":false,"id":489823,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70093609,"text":"ofr20071047SRP037 - 2007 - East Antarctic Ice Sheet fluctuations during the Middle Miocene Climatic  Transition inferred from faunal and biogeochemical data on planktonic  foraminifera (ODP Hole 747A, Kerguelen Plateau)","interactions":[],"lastModifiedDate":"2014-02-10T13:54:59","indexId":"ofr20071047SRP037","displayToPublicDate":"2007-01-01T13:39:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-037","title":"East Antarctic Ice Sheet fluctuations during the Middle Miocene Climatic  Transition inferred from faunal and biogeochemical data on planktonic  foraminifera (ODP Hole 747A, Kerguelen Plateau)","docAbstract":"This research focuses on a detailed study of faunal and biogeochemical changes that occurred at ODP Hole \n747A in the Kerguelen Plateau region of the Southern Ocean during the middle Miocene (14.8-11.8 Ma). Abundance \nfluctuations of several planktonic foraminiferal taxa, stable oxygen isotope and Mg/Ca ratios have been integrated as a \nmulti-proxy approach to reach a better understanding of the growth modality and fluctuations of the East Antarctic Ice \nSheet (EAIS) during this period. A 7°C decrease in Sea Surface Temperature (SST), an abrupt turnover in the planktonic \nforaminiferal assemblage, a 1.5‰ shift towards heavier δ<sup>18</sup>O values (Mi3 event) and a related shift towards heavier \nseawater δ1<sup>18</sup>O values between 13.9 and 13.7 Ma, are interpreted to reflect rapid surface water cooling and EAIS \nexpansion. Hole 747A data suggest a major change in the variability of the climate system fostered by EAIS expansion \nbetween 13.9 and 13.7 Ma. Ice sheet fluctuations were greater during the interval 14.8-13.9 Ma compared with those \nfrom 13.7 to 11.8 Ma, whereas the latter interval was characterized by a more stable EAIS. In our opinion, the middle \nMiocene ice sheet expansion in Antarctica represents a first step towards the development of the modern permanent ice \nsheet","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP037","usgsCitation":"Verducci, M., Foresi, L., Scott, G., Tiepolo, Sprovieri, M., and Lirer, F., 2007, East Antarctic Ice Sheet fluctuations during the Middle Miocene Climatic  Transition inferred from faunal and biogeochemical data on planktonic  foraminifera (ODP Hole 747A, Kerguelen Plateau): U.S. Geological Survey Open-File Report 2007-1047-SRP-037, 5 p., https://doi.org/10.3133/ofr20071047SRP037.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":282223,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP037.JPG"},{"id":282222,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp037/of2007-1047srp037.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 180.0,-90.0 ], [ 180.0,-60.0 ], [ -180.0,-60.0 ], [ -180.0,-90.0 ], [ 180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd563ae4b0b290850f6cb2","contributors":{"authors":[{"text":"Verducci, M.","contributorId":62134,"corporation":false,"usgs":true,"family":"Verducci","given":"M.","email":"","affiliations":[],"preferred":false,"id":490077,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Foresi, L.M.","contributorId":107608,"corporation":false,"usgs":true,"family":"Foresi","given":"L.M.","email":"","affiliations":[],"preferred":false,"id":490078,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Scott, G.H.","contributorId":54509,"corporation":false,"usgs":true,"family":"Scott","given":"G.H.","email":"","affiliations":[],"preferred":false,"id":490076,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Tiepolo","contributorId":128047,"corporation":true,"usgs":false,"organization":"Tiepolo","id":535627,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Sprovieri, M.","contributorId":12775,"corporation":false,"usgs":true,"family":"Sprovieri","given":"M.","email":"","affiliations":[],"preferred":false,"id":490073,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Lirer, F.","contributorId":54108,"corporation":false,"usgs":true,"family":"Lirer","given":"F.","email":"","affiliations":[],"preferred":false,"id":490075,"contributorType":{"id":1,"text":"Authors"},"rank":6}]}}
,{"id":70094187,"text":"ofr20071047SRP054 - 2007 - Modeling environmental bias and computing velocity field from data of Terra Nova Bay GPS network in Antarctica by means of a quasi-observation processing approach","interactions":[],"lastModifiedDate":"2014-02-18T13:58:14","indexId":"ofr20071047SRP054","displayToPublicDate":"2007-01-01T13:38:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-054","title":"Modeling environmental bias and computing velocity field from data of Terra Nova Bay GPS network in Antarctica by means of a quasi-observation processing approach","docAbstract":"A semi-permanent GPS network of about 30 vertices has been installed at Terra Nova Bay (TNB) near \nRoss Sea in Antarctica. A permanent GPS station TNB1 based on an Ashtech Z-XII dual frequency P-code GPS \nreceiver with ASH700936D_M Choke Ring Antenna has been mounted on a reinforced concrete pillar built on \nbedrock since October 1998 and has recorded continuously up to the present. The semi-permanent network has been \nroutinely surveyed every summer using high quality dual frequency GPS receivers with 24 hour sessions at 15 sec \nrate; data, metadata and solutions will be available to the scientific community at (http://www.geodant.unimore.it). \nWe present the results of a distributed session approach applied to processing GPS data of the TNB GPS network, and \nbased on Gamit/Globk 10.2-3 GPS analysis software. The results are in good agreement with other authors' \ncomputations and with many of the theoretical models.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP054","usgsCitation":"Casula, G., Dubbini, M., and Galeandro, A., 2007, Modeling environmental bias and computing velocity field from data of Terra Nova Bay GPS network in Antarctica by means of a quasi-observation processing approach: U.S. Geological Survey Open-File Report 2007-1047-SRP-054, 4 p., https://doi.org/10.3133/ofr20071047SRP054.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":282489,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP054.JPG"},{"id":282488,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp054/of2007-1047srp054.pdf"}],"otherGeospatial":"Antarctica;Terra Nova Bay","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 160.76,-75.01 ], [ 160.76,-69.98 ], [ 171.32,-69.98 ], [ 171.32,-75.01 ], [ 160.76,-75.01 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd67dde4b0b29085101ab6","contributors":{"authors":[{"text":"Casula, Giuseppe","contributorId":27357,"corporation":false,"usgs":true,"family":"Casula","given":"Giuseppe","email":"","affiliations":[],"preferred":false,"id":490543,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dubbini, Marco","contributorId":93819,"corporation":false,"usgs":true,"family":"Dubbini","given":"Marco","email":"","affiliations":[],"preferred":false,"id":490544,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Galeandro, Angelo","contributorId":96586,"corporation":false,"usgs":true,"family":"Galeandro","given":"Angelo","email":"","affiliations":[],"preferred":false,"id":490545,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70103167,"text":"ofr20071047SRP101 - 2007 - Thermochronologic constraints on the tectonic evolution of the western Antarctic Peninsula in late Mesozoic and Cenozoic times","interactions":[],"lastModifiedDate":"2014-04-29T13:54:18","indexId":"ofr20071047SRP101","displayToPublicDate":"2007-01-01T13:38:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-101","title":"Thermochronologic constraints on the tectonic evolution of the western Antarctic Peninsula in late Mesozoic and Cenozoic times","docAbstract":"West of the Antarctic Peninsula, oceanic lithosphere of the Phoenix plate has been subducted below the \nAntarctic plate. Subduction has ceased successively from south to north over the last 65 Myr. An influence of this \nevolution on the segmentation of the crust in the Antarctic plate is disputed. Opposing scenarios consider effects of \nridge crest – trench interactions with the subduction zone or differences in slip along a basal detachment in the \noverriding plate. Fission track (FT) analyses on apatites and zircons may detect thermochronologic patterns to test these \nhypotheses. While existing data concentrate on accretionary processes in Palmer Land, new data extend information to \nthe northern part of the Antarctic Peninsula. Zircons from different geological units over wide areas of the Antarctic \nPeninsula yield fission track ages between 90 and 80 Ma, indicating a uniform regional cooling episode. Apatite FT \nages obtained so far show considerable regional variability","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP101","usgsCitation":"Brix, M., Faundez, V., Herve, F., Solari, M., Fernandez, J., Carter, A., and Stockhert, B., 2007, Thermochronologic constraints on the tectonic evolution of the western Antarctic Peninsula in late Mesozoic and Cenozoic times: U.S. Geological Survey Open-File Report 2007-1047-SRP-101, 5 p., https://doi.org/10.3133/ofr20071047SRP101.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":286775,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP101.JPG"},{"id":286774,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp101/of2007-1047srp101.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5360c9fde4b082a3ecf53e3d","contributors":{"authors":[{"text":"Brix, M.R.","contributorId":100295,"corporation":false,"usgs":true,"family":"Brix","given":"M.R.","email":"","affiliations":[],"preferred":false,"id":493190,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Faundez, V.","contributorId":44464,"corporation":false,"usgs":true,"family":"Faundez","given":"V.","email":"","affiliations":[],"preferred":false,"id":493186,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Herve, F.","contributorId":26975,"corporation":false,"usgs":true,"family":"Herve","given":"F.","email":"","affiliations":[],"preferred":false,"id":493185,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Solari, M.","contributorId":12374,"corporation":false,"usgs":true,"family":"Solari","given":"M.","email":"","affiliations":[],"preferred":false,"id":493184,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Fernandez, J.","contributorId":46229,"corporation":false,"usgs":true,"family":"Fernandez","given":"J.","affiliations":[],"preferred":false,"id":493187,"contributorType":{"id":1,"text":"Authors"},"rank":5},{"text":"Carter, A.","contributorId":62438,"corporation":false,"usgs":true,"family":"Carter","given":"A.","email":"","affiliations":[],"preferred":false,"id":493188,"contributorType":{"id":1,"text":"Authors"},"rank":6},{"text":"Stockhert, B.","contributorId":69064,"corporation":false,"usgs":true,"family":"Stockhert","given":"B.","email":"","affiliations":[],"preferred":false,"id":493189,"contributorType":{"id":1,"text":"Authors"},"rank":7}]}}
,{"id":70103490,"text":"ofr20071047SRP109 - 2007 - Crustal architecture of the oblique-slip conjugate margins of George V Land  and southeast Australia","interactions":[],"lastModifiedDate":"2014-05-05T13:56:27","indexId":"ofr20071047SRP109","displayToPublicDate":"2007-01-01T13:37:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-109","title":"Crustal architecture of the oblique-slip conjugate margins of George V Land  and southeast Australia","docAbstract":"A conceptual, lithospheric-scale cross-section of the conjugate, oblique-slip margins of George V Land, East \nAntarctica, and southeast Australia (Otway Basin) has been constructed based on the integration of seismic and sample \ndata. This cross-section is characterised by asymmetry in width and thickness, and depth-dependent crustal extension at \nbreakup in the latest Maastrichtian. The broad Antarctic margin (~360 km apparent rift width) developed on thick \ncrust (~42 km) of the Antarctic craton, whereas the narrow Otway margin (~220 km) developed on the thinner crust \n(~31 km) of the Ross–Delamerian Orogen. The shallow basement (velocities ~5.5 km.s-1) and the deep continental \ncrust (velocities >6.4 km.s-1) appear to be largely absent across the central rift, while the mid-crustal, probably granitic \nlayer (velocities ~6 km.s-1) is preserved. Comparison with published numerical models suggests that the shallow \nbasement and deep crust may have been removed by simple shear, whereas the mid-crust has been ductilely deformed.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP109","usgsCitation":"Stagg, H., and Reading, A., 2007, Crustal architecture of the oblique-slip conjugate margins of George V Land  and southeast Australia: U.S. Geological Survey Open-File Report 2007-1047-SRP-109, 6 p., https://doi.org/10.3133/ofr20071047SRP109.","productDescription":"6 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":286882,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp109/of2007-1047srp109.pdf"},{"id":286883,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP109.JPG"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5368b2ece4b059f7e828832b","contributors":{"authors":[{"text":"Stagg, H.M.J.","contributorId":7843,"corporation":false,"usgs":true,"family":"Stagg","given":"H.M.J.","email":"","affiliations":[],"preferred":false,"id":493372,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Reading, A.M.","contributorId":55342,"corporation":false,"usgs":true,"family":"Reading","given":"A.M.","email":"","affiliations":[],"preferred":false,"id":493373,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70093760,"text":"ofr20071047SRP044 - 2007 - Thermochronologic constraints on Jurassic rift flank denudation in the Thiel Mountains, Antarctica","interactions":[],"lastModifiedDate":"2014-02-17T16:06:45","indexId":"ofr20071047SRP044","displayToPublicDate":"2007-01-01T13:35:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-044","title":"Thermochronologic constraints on Jurassic rift flank denudation in the Thiel Mountains, Antarctica","docAbstract":"The Thiel Mountains are part of the Transantarctic Mountains (TAM) and occupy a strategic position close \nto the East-West Antarctic boundary. They occur in a region of relatively subdued topography distal from high \ntopography and high relief of most of the TAM adjacent to the West Antarctic rift system. Low-temperature \nthermochronology on samples collected from the Reed Ridge granite on the north flank of the Thiel Mountains \nconstrain the thermal and hence tectonic history. Apatite fission track data plus thermal models indicate cooling from \nca. 165-150 Ma. In conjunction with <sup>40</sup>Ar/<sup>39</sup>Ar K-feldspar data, the results indicate cooling was due to relatively slow \nerosional denudation, and not thermal relaxation following Jurassic tholeiitic magmatism. Denudation was most likely \nassociated with the formation of the Jurassic rift system across Antarctica that marked the initial breakup of Gondwana. \nThis is the oldest episode of denudation associated with formation of the present day TAM","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP044","usgsCitation":"Fitzgerald, P., and Baldwin, S., 2007, Thermochronologic constraints on Jurassic rift flank denudation in the Thiel Mountains, Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-044, 4 p., https://doi.org/10.3133/ofr20071047SRP044.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":282453,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP044.png"},{"id":282452,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp044/of2007-1047srp044.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd78e1e4b0b2908510c722","contributors":{"authors":[{"text":"Fitzgerald, P.G.","contributorId":18579,"corporation":false,"usgs":true,"family":"Fitzgerald","given":"P.G.","email":"","affiliations":[],"preferred":false,"id":490195,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Baldwin, S.L.","contributorId":16752,"corporation":false,"usgs":true,"family":"Baldwin","given":"S.L.","email":"","affiliations":[],"preferred":false,"id":490194,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70074381,"text":"ofr20071047SRP024 - 2007 - Abrupt turnover in calcareous-nannoplankton assemblages across the  Paleocene/Eocene Thermal Maximum: implications for surface-water  oligotrophy over the Kerguelen Plateau, Southern Indian Ocean","interactions":[],"lastModifiedDate":"2014-02-03T12:46:55","indexId":"ofr20071047SRP024","displayToPublicDate":"2007-01-01T13:34:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-024","title":"Abrupt turnover in calcareous-nannoplankton assemblages across the  Paleocene/Eocene Thermal Maximum: implications for surface-water  oligotrophy over the Kerguelen Plateau, Southern Indian Ocean","docAbstract":"Ocean Drilling Program (ODP) Core Section 183-1135A-25R-4 from the Kerguelen Plateau in the Indian \nOcean sector of the Southern Ocean represents only the second complete, expanded sequence through the \nPaleocene/Eocene Thermal Maximum (PETM; ~55 Ma) recovered from Antarctic waters. Calcareous nannoplankton at \nthis site underwent an abrupt, fundamental turnover across the PETM as defined by a carbon isotope excursion. \nAlthough Chiasmolithus, Discoaster, and Fasciculithus exponentially increase in abundance at the onset, the former \nabruptly drops but then rapidly recovers, whereas the latter two taxa show opposite trends due to surface-water \noligotrophy. These observations confirm previous results from ODP Site 690 on Maud Rise. The elevated pCO<sub>2</sub> that \naccompanied the PETM caused a shoaling of the lysocline and carbonate compensation depth, leading to intensive \ndissolution of susceptible holococcoliths and poor preservation of the assemblages. Similarities and contrasts between \nthe results of this study and previous work from open-ocean sites and shelf margins further demonstrate that the \nresponse to the PETM was consistent in open-ocean environments, but could be localized on continental shelves where \nnutrient regimes depend on the local geologic setting and oceanographic conditions.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP024","usgsCitation":"Jiang, S., and Wise, S.W., 2007, Abrupt turnover in calcareous-nannoplankton assemblages across the  Paleocene/Eocene Thermal Maximum: implications for surface-water  oligotrophy over the Kerguelen Plateau, Southern Indian Ocean: U.S. Geological Survey Open-File Report 2007-1047-SRP-024, 5 p., https://doi.org/10.3133/ofr20071047SRP024.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":281663,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp024/of2007-1047srp024.pdf"},{"id":281664,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP024.JPG"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 180.0,-90.0 ], [ 180.0,-60.0 ], [ -180.0,-60.0 ], [ -180.0,-90.0 ], [ 180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd4ae5e4b0b290850f00c3","contributors":{"authors":[{"text":"Jiang, Shijun","contributorId":86684,"corporation":false,"usgs":true,"family":"Jiang","given":"Shijun","email":"","affiliations":[],"preferred":false,"id":489551,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wise, Sherwood W. Jr.","contributorId":36052,"corporation":false,"usgs":true,"family":"Wise","given":"Sherwood","suffix":"Jr.","email":"","middleInitial":"W.","affiliations":[],"preferred":false,"id":489550,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70074750,"text":"ofr20071047SRP027 - 2007 - Granulometry of pebble beach ridges in Fort Williams Point, Greenwich Island,  Antarctic Peninsula; a possible result from Holocene climate fluctuations","interactions":[],"lastModifiedDate":"2014-02-03T13:40:31","indexId":"ofr20071047SRP027","displayToPublicDate":"2007-01-01T13:30:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-027","title":"Granulometry of pebble beach ridges in Fort Williams Point, Greenwich Island,  Antarctic Peninsula; a possible result from Holocene climate fluctuations","docAbstract":"We present a granulometric study of emerged pebble beach ridges in the Fort Williams Point, Greenwich \nIsland, Antarctic Peninsula. We studied 8 beach ridges from the shore up to 13.5 m above current sea level. The beach \nridges are made of volcanic material from the surrounding relief, but also include glacially transported gneiss and \ngranodiorite pebble and cobble. Based on granulometric distribution analysis of 2100 samples from 39 locations we \nidentified evidence of 4 sequences of 1 to 3 ridges. Most of the material seems to be reworked from a till. Pavement \nformation by iceberg between the sequences of beach ridges suggests periods of lower temperature. The interpretation \nsuggests that sequences of beach ridge construction formed during warmer periods of the late Holocene. This occurs in \nthe framework of an isostatic postglacial uplift allowing the progressive mobilization of periglaciar material.","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP027","usgsCitation":"Santana, E., and Dumont, J., 2007, Granulometry of pebble beach ridges in Fort Williams Point, Greenwich Island,  Antarctic Peninsula; a possible result from Holocene climate fluctuations: U.S. Geological Survey Open-File Report 2007-1047-SRP-027, 4 p., https://doi.org/10.3133/ofr20071047SRP027.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":281897,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp027/of2007-1047srp027.pdf"},{"id":281900,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP027.JPG"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 180.0,-90.0 ], [ 180.0,-60.0 ], [ -180.0,-60.0 ], [ -180.0,-90.0 ], [ 180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd5f0de4b0b290850fc160","contributors":{"authors":[{"text":"Santana, E.","contributorId":103568,"corporation":false,"usgs":true,"family":"Santana","given":"E.","email":"","affiliations":[],"preferred":false,"id":489817,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Dumont, J.F.","contributorId":92574,"corporation":false,"usgs":true,"family":"Dumont","given":"J.F.","email":"","affiliations":[],"preferred":false,"id":489816,"contributorType":{"id":1,"text":"Authors"},"rank":2}]}}
,{"id":70103166,"text":"ofr20071047SRP100 - 2007 - Major magmatic events in Mt Meredith, Prince Charles Mountains: First evidence for early Palaeozoic syntectonic granites","interactions":[],"lastModifiedDate":"2014-04-29T13:35:27","indexId":"ofr20071047SRP100","displayToPublicDate":"2007-01-01T13:18:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-100","title":"Major magmatic events in Mt Meredith, Prince Charles Mountains: First evidence for early Palaeozoic syntectonic granites","docAbstract":"Precambrian rocks at Mt Meredith underwent granulite-facies metamorphism M1. Zircon isotope dating for \ntwo orthogneisses revealed the following age signatures: 1294±3 and 957±4Ma; 1105±5 and 887±2Ma. The oldest ages \ncould reflect the time of orthogneiss protolith crystallization and the latest age determinations date Grenvillian \nmetamorphism. The metamorphic rocks were intruded by two-mica and garnet-biotite granites. The granites and host \nrocks underwent amphibolite-facies metamorphism M2. Zircon isotope analysis of the two-mica granites showed age \nestimation within 550-510Ma and zircon dating of the garnet-biotite granites revealed the ages of 1107±5, 953±8, and \n551±4Ma. As Pan-African age signatures were obtained from only the granite samples, it is possible to suggest that the \ngranites were formed at the time of 510-550Ma and the zircons with greater age values were captured by granites from \nthe host rocks.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP100","usgsCitation":"Gongurov, N., Laiba, A., and Beliatsky, B., 2007, Major magmatic events in Mt Meredith, Prince Charles Mountains: First evidence for early Palaeozoic syntectonic granites: U.S. Geological Survey Open-File Report 2007-1047-SRP-100, 4 p., https://doi.org/10.3133/ofr20071047SRP100.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":286771,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp100/of2007-1047srp100.pdf"},{"id":286772,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP100.JPG"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5360c9efe4b082a3ecf53e13","contributors":{"authors":[{"text":"Gongurov, N.A.","contributorId":41342,"corporation":false,"usgs":true,"family":"Gongurov","given":"N.A.","email":"","affiliations":[],"preferred":false,"id":493181,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Laiba, A.A.","contributorId":98634,"corporation":false,"usgs":true,"family":"Laiba","given":"A.A.","email":"","affiliations":[],"preferred":false,"id":493183,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Beliatsky, B.V.","contributorId":80587,"corporation":false,"usgs":true,"family":"Beliatsky","given":"B.V.","email":"","affiliations":[],"preferred":false,"id":493182,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70120916,"text":"ofr20071397 - 2007 - Cartographic production for the Florida Shelf Habitat (FLaSH) map study: generation of surface grids, contours, and KMZ files","interactions":[],"lastModifiedDate":"2014-08-18T13:20:41","indexId":"ofr20071397","displayToPublicDate":"2007-01-01T13:16:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1397","title":"Cartographic production for the Florida Shelf Habitat (FLaSH) map study: generation of surface grids, contours, and KMZ files","docAbstract":"<p>The Florida shelf represents a finite source of economic resources, including commercial and recreational fisheries, tourism, recreation, sand and gravel resources, phosphate, and freshwater reserves. Yet the basic information needed to locate resources, or to interpret and utilize existing data, comes from many sources, dates, and formats. A multi-agency effort is underway to coordinate and prioritize the compilation of suitable datasets for an integrated information system of Florida’s coastal and ocean resources. This report and the associated data files represent part of the effort to make data accessible and useable with computer-mapping systems, web-based technologies, and user-friendly visualization tools. Among the datasets compiled and developed are seafloor imagery, marine sediment data, and existing bathymetric data. A U.S. Geological Survey-sponsored workshop in January 2007 resulted in the establishment of mapping priorities for the state. Bathymetry was identified as a common priority among agencies and researchers. State-of-the-art computer-mapping techniques and data-processing tools were used to develop shelf-wide raster and vector data layers. Florida Shelf Habitat (FLaSH) Mapping Project (<a href=\"http://coastal.er.usgs.gov/flash\">http://coastal.er.usgs.gov/flash</a>) endeavors to locate available data, identify data gaps, synthesize existing information, and expand our understanding of geologic processes in our dynamic coastal and marine systems.</p>","language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071397","usgsCitation":"Robbins, L.L., Hansen, M., Raabe, E., Knorr, P.O., and Browne, J., 2007, Cartographic production for the Florida Shelf Habitat (FLaSH) map study: generation of surface grids, contours, and KMZ files: U.S. Geological Survey Open-File Report 2007-1397, HTML Document, https://doi.org/10.3133/ofr20071397.","productDescription":"HTML Document","costCenters":[{"id":186,"text":"Coastal and Marine Geology Program","active":true,"usgs":true}],"links":[{"id":292444,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"},{"id":292443,"type":{"id":15,"text":"Index Page"},"url":"https://pubs.usgs.gov/of/2007/1397/"}],"country":"United States","state":"Florida","otherGeospatial":"Florida Shelf","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -87.0,25.0 ], [ -87.0,30.0 ], [ -80.0,30.0 ], [ -80.0,25.0 ], [ -87.0,25.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53f25fc4e4b03334187188fa","contributors":{"authors":[{"text":"Robbins, Lisa L. 0000-0003-3681-1094 lrobbins@usgs.gov","orcid":"https://orcid.org/0000-0003-3681-1094","contributorId":422,"corporation":false,"usgs":true,"family":"Robbins","given":"Lisa","email":"lrobbins@usgs.gov","middleInitial":"L.","affiliations":[{"id":574,"text":"St. Petersburg Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":498611,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Hansen, Mark","contributorId":81893,"corporation":false,"usgs":true,"family":"Hansen","given":"Mark","affiliations":[],"preferred":false,"id":498613,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Raabe, Ellen","contributorId":98402,"corporation":false,"usgs":true,"family":"Raabe","given":"Ellen","affiliations":[],"preferred":false,"id":498614,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Knorr, Paul O. pknorr@usgs.gov","contributorId":3691,"corporation":false,"usgs":true,"family":"Knorr","given":"Paul","email":"pknorr@usgs.gov","middleInitial":"O.","affiliations":[{"id":574,"text":"St. Petersburg Coastal and Marine Science Center","active":true,"usgs":true}],"preferred":true,"id":498612,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Browne, Joseph","contributorId":102398,"corporation":false,"usgs":true,"family":"Browne","given":"Joseph","email":"","affiliations":[],"preferred":false,"id":498615,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70103487,"text":"ofr20071047SRP108 - 2007 - Structure of the central Terror Rift, western Ross Sea, Antarctica","interactions":[],"lastModifiedDate":"2014-05-05T13:32:52","indexId":"ofr20071047SRP108","displayToPublicDate":"2007-01-01T13:15:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-108","title":"Structure of the central Terror Rift, western Ross Sea, Antarctica","docAbstract":"The Terror Rift is a zone of post-middle Miocene faulting and volcanism along the western margin of the \nWest Antarctic Rift System. A new seismic data set from NSF geophysical cruise NBP04-01, integrated with the \nprevious dataset to provide higher spatial resolution, has been interpreted in this study in order to improve \nunderstanding of the architecture and history of the Terror Rift. The Terror Rift contains two components, a \nstructurally-controlled rollover anticlinal arch intruded by younger volcanic bodies and an associated synclinal basin. \nOffsets and trend changes in fault patterns have been identified, coincident with shifts in the location of depocenters that \ndefine rift sub-basins, indicating that the Terror Rift is segmented by transverse structures. Multiple phases of faulting \nall post-date 17 Ma, including faults cutting the seafloor surface, indicating Neogene rifting and possible modern \nactivity.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP108","usgsCitation":"Hall, J., Wilson, T., and Henrys, S., 2007, Structure of the central Terror Rift, western Ross Sea, Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-108, 5 p., https://doi.org/10.3133/ofr20071047SRP108.","productDescription":"5 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":286881,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP108.JPG"},{"id":286880,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp108/of2007-1047srp108.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"5368b2fee4b059f7e8288385","contributors":{"authors":[{"text":"Hall, Jerome","contributorId":68656,"corporation":false,"usgs":true,"family":"Hall","given":"Jerome","email":"","affiliations":[],"preferred":false,"id":493363,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilson, Terry","contributorId":33618,"corporation":false,"usgs":true,"family":"Wilson","given":"Terry","affiliations":[],"preferred":false,"id":493362,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Henrys, Stuart","contributorId":21464,"corporation":false,"usgs":true,"family":"Henrys","given":"Stuart","affiliations":[],"preferred":false,"id":493361,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70100993,"text":"ofr20071047SRP090 - 2007 - Seismic facies and stratigraphy of the Cenozoic succession in McMurdo Sound, Antarctica: Implications for tectonic, climatic and glacial history","interactions":[],"lastModifiedDate":"2014-04-08T15:58:42","indexId":"ofr20071047SRP090","displayToPublicDate":"2007-01-01T13:08:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-090","title":"Seismic facies and stratigraphy of the Cenozoic succession in McMurdo Sound, Antarctica: Implications for tectonic, climatic and glacial history","docAbstract":"A new stratigraphic model is presented for the evolution of the Cenozoic Victoria Land Basin of the West \nAntarctic Rift, based on integration of seismic reflection and drilling data. The Early Rift phase (?latest Eocene to Early \nOligocene) comprises wedges of strata confined by early extensional faults, and which contain seismic facies consistent \nwith drainage via coarse-grained fans and deltas into discrete, actively subsiding grabens and half-grabens. The Main \nRift phase (Early Oligocene to Early Miocene) comprises a lens of strata that thickens symmetrically from the basin \nmargins into a central depocenter, and in which stratal events pass continuously over the top of the Early Rift \nextensional topography. Internal seismic facies and lithofacies indicate a more organized, cyclical shallow marine \nsuccession, influenced increasingly upward by cycles of glacial advance and retreat into the basin. The Passive Thermal \nSubsidence phase (Early Miocene to ?) comprises an evenly distributed sheet of strata that does not thicken appreciably \ninto the depocentre, with more evidence for clinoform sets and large channels. These patterns are interpreted to record \naccumulation under similar environmental conditions but in a regime of slower subsidence. The Renewed Rifting phase \n(? to Recent, largely unsampled by coring thus far) has been further divided into 1, a lower interval, in which the section \nthickens passively towards a central depocentre, and 2. an upper interval, in which more dramatic thickening patterns \nare complicated by magmatic activity. The youngest part of the stratigraphy was accumulated under the influence of \nflexural loading imposed by the construction of large volcanic edifices, and involved minimal sediment supply from the \nwestern basin margin, suggesting a change in environmental (glacial) conditions at possibly c. 2 Ma.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP090","usgsCitation":"Fielding, C., Whittaker, J., Henrys, S., Wilson, T.J., and Nash, T., 2007, Seismic facies and stratigraphy of the Cenozoic succession in McMurdo Sound, Antarctica: Implications for tectonic, climatic and glacial history: U.S. Geological Survey Open-File Report 2007-1047-SRP-090, 4 p., https://doi.org/10.3133/ofr20071047SRP090.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":285904,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/usgs_thumb.jpg"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -180.0,-90.0 ], [ -180.0,-60.0 ], [ 180.0,-60.0 ], [ 180.0,-90.0 ], [ -180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53559560e4b0120853e8c1d9","contributors":{"authors":[{"text":"Fielding, C.R.","contributorId":25864,"corporation":false,"usgs":true,"family":"Fielding","given":"C.R.","email":"","affiliations":[],"preferred":false,"id":492495,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Whittaker, J.","contributorId":88650,"corporation":false,"usgs":true,"family":"Whittaker","given":"J.","email":"","affiliations":[],"preferred":false,"id":492499,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Henrys, S.A.","contributorId":56097,"corporation":false,"usgs":true,"family":"Henrys","given":"S.A.","email":"","affiliations":[],"preferred":false,"id":492497,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Wilson, T. J.","contributorId":31942,"corporation":false,"usgs":false,"family":"Wilson","given":"T.","email":"","middleInitial":"J.","affiliations":[],"preferred":false,"id":492496,"contributorType":{"id":1,"text":"Authors"},"rank":4},{"text":"Nash, T.R.","contributorId":63721,"corporation":false,"usgs":true,"family":"Nash","given":"T.R.","email":"","affiliations":[],"preferred":false,"id":492498,"contributorType":{"id":1,"text":"Authors"},"rank":5}]}}
,{"id":70074741,"text":"ofr20071047SRP025 - 2007 - Basement and crustal structure of the Davis Sea region (East Antarctica): implications for tectonic setting and continent to oceanic boundary definition","interactions":[],"lastModifiedDate":"2014-02-03T13:14:29","indexId":"ofr20071047SRP025","displayToPublicDate":"2007-01-01T13:01:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-025","title":"Basement and crustal structure of the Davis Sea region (East Antarctica): implications for tectonic setting and continent to oceanic boundary definition","docAbstract":"This study is based on about 8400 km of MCS, magnetic and gravity data as well as 20 sonobuoys collected \nby the Russian Antarctic Expedition during 2003 and 2004 in the Davis Sea and adjacent areas between 80°E and \n102°E. Major tectonic provinces and features are identified and mapped in the study region including: 1) A marginal rift \nwith a the extended continental crust ranging 130 to more than 200 km in width; 2) The marginal volcanic plateau of the \nBruce Bank consisting of the Early Cretaceous igneous rocks; 3) The Early Cretaceous and Late Cretaceous−Paleogene \noceanic basins; and 4) The Early Cretaceous igneous province of the Kerguelen Plateau. Four major horizons identified \nin the sedimentary cover of the Davis Sea region are attributed to main tectonic events and/or paleoenvironmental \nchanges.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP025","usgsCitation":"Guseva, Y., Leitchenkov, G., Gandyukhin, V., and Ivanov, S., 2007, Basement and crustal structure of the Davis Sea region (East Antarctica): implications for tectonic setting and continent to oceanic boundary definition: U.S. Geological Survey Open-File Report 2007-1047-SRP-025, 4 p., https://doi.org/10.3133/ofr20071047SRP025.","productDescription":"4 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":281892,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP025.JPG"},{"id":281890,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp025/of2007-1047srp025.pdf"}],"otherGeospatial":"Antarctica","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 180.0,-90.0 ], [ 180.0,-60.0 ], [ -180.0,-60.0 ], [ -180.0,-90.0 ], [ 180.0,-90.0 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd4ed6e4b0b290850f25a6","contributors":{"authors":[{"text":"Guseva, Y.B.","contributorId":103808,"corporation":false,"usgs":true,"family":"Guseva","given":"Y.B.","email":"","affiliations":[],"preferred":false,"id":489776,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Leitchenkov, G.L.","contributorId":70126,"corporation":false,"usgs":true,"family":"Leitchenkov","given":"G.L.","email":"","affiliations":[],"preferred":false,"id":489775,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Gandyukhin, V.V.","contributorId":35081,"corporation":false,"usgs":true,"family":"Gandyukhin","given":"V.V.","email":"","affiliations":[],"preferred":false,"id":489774,"contributorType":{"id":1,"text":"Authors"},"rank":3},{"text":"Ivanov, S.V.","contributorId":23435,"corporation":false,"usgs":true,"family":"Ivanov","given":"S.V.","email":"","affiliations":[],"preferred":false,"id":489773,"contributorType":{"id":1,"text":"Authors"},"rank":4}]}}
,{"id":70094181,"text":"ofr20071047SRP053 - 2007 - Microstructural study of natural fractures in Cape Roberts Project 3 core, Western Ross Sea, Antarctica","interactions":[],"lastModifiedDate":"2014-02-18T13:24:54","indexId":"ofr20071047SRP053","displayToPublicDate":"2007-01-01T12:59:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-053","title":"Microstructural study of natural fractures in Cape Roberts Project 3 core, Western Ross Sea, Antarctica","docAbstract":"Microstructures in natural fractures in core recovered offshore from Cape Roberts, Ross Sea, Antarctica, \nprovide new constraints on the relative timing of faulting and sedimentation in the Victoria Land Basin along the \nTransantarctic Mountain rift flank. This study characterizes the textures, fabrics and grain-scale structures from thin \nsection analysis of samples of microfaults, veins, and clastic dikes. Microfaults are abundant and display two different \ntypes of textures, interpreted to record two different deformation modes: pre-lithification shearing and brittle faulting of \ncohesive sediment. Both clastic dikes and calcite veins commonly follow fault planes, indicating that injections of \nliquefied sediment and circulating fluids used pre-existing faults as conduits. The close association of clastic injections, \ndiagenetic mineralization, and faulting indicates that faulting was synchronous with deposition in the rift basin","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP053","usgsCitation":"Millan, C., Wilson, T., and Paulsen, T., 2007, Microstructural study of natural fractures in Cape Roberts Project 3 core, Western Ross Sea, Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-053, 4 p., https://doi.org/10.3133/ofr20071047SRP053.","productDescription":"4 p.","onlineOnly":"N","costCenters":[],"links":[{"id":282487,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP053.JPG"},{"id":282486,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp053/of2007-1047srp053.pdf"}],"otherGeospatial":"Antarctica;Ross Sea","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ -165.07,-79.3 ], [ -165.07,-76.9 ], [ -157.42,-76.9 ], [ -157.42,-79.3 ], [ -165.07,-79.3 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd670fe4b0b29085101220","contributors":{"authors":[{"text":"Millan, C.","contributorId":94123,"corporation":false,"usgs":true,"family":"Millan","given":"C.","email":"","affiliations":[],"preferred":false,"id":490542,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Wilson, T.","contributorId":49581,"corporation":false,"usgs":true,"family":"Wilson","given":"T.","affiliations":[],"preferred":false,"id":490540,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Paulsen, T.","contributorId":78167,"corporation":false,"usgs":true,"family":"Paulsen","given":"T.","email":"","affiliations":[],"preferred":false,"id":490541,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
,{"id":70094739,"text":"ofr20071047SRP062 - 2007 - Metamorphic conditions during formation of a metapelitic sillimanite-garnet  gneiss from Clemence Massif, Prince Charles Mountains, East Antarctica","interactions":[],"lastModifiedDate":"2014-02-24T13:57:27","indexId":"ofr20071047SRP062","displayToPublicDate":"2007-01-01T12:55:00","publicationYear":"2007","noYear":false,"publicationType":{"id":18,"text":"Report"},"publicationSubtype":{"id":5,"text":"USGS Numbered Series"},"seriesTitle":{"id":330,"text":"Open-File Report","code":"OFR","onlineIssn":"2331-1258","printIssn":"0196-1497","active":true,"publicationSubtype":{"id":5}},"seriesNumber":"2007-1047-SRP-062","title":"Metamorphic conditions during formation of a metapelitic sillimanite-garnet  gneiss from Clemence Massif, Prince Charles Mountains, East Antarctica","docAbstract":"The pressure (P) and temperature (T) conditions during metamorphism of a metapelitic sillimanite-garnet \ngneiss from Clemence Massif, Antarctic Prince Charles Mountains, are estimated using mineral abundance information \nand petrogenetic P–T pseudosections computed in the chemical system MnO–N<sub>2</sub>O–CaO–K<sub>2</sub>O–FeO–MgO–Al<sub>2</sub>O<sub>3</sub>–\nSiO<sub>2</sub>–H<sub>2</sub>O–TiO<sub>2</sub>–Fe<sub>2</sub>O<sub>3</sub> (MnNCKFMASHTO). Calculated mineral equilibria for the appropriate bulk composition predict that the observed assemblage, of K-feldspar–garnet–quartz–sillimanite–biotite–ilmenite–rutile, stabilised at \napproximately 8–9 kbar and 760–790ºC. Reaction microstructures are rare, but the preservation of relic spinel \ninclusions in garnet indicates an earlier low-P, high-T component and possible anticlockwise path.","largerWorkType":{"id":18,"text":"Report"},"largerWorkTitle":"Antarctica: A Keystone in a Changing World--Online Proceedings for the Tenth International Symposium on Antarctic Earth Sciences. Santa Barbara, California, U.S.A.--August 26 to September 1, 2007","largerWorkSubtype":{"id":5,"text":"USGS Numbered Series"},"language":"English","publisher":"U.S. Geological Survey","publisherLocation":"Reston, VA","doi":"10.3133/ofr20071047SRP062","usgsCitation":"Corvino, A., Boger, S., and Wilson, C., 2007, Metamorphic conditions during formation of a metapelitic sillimanite-garnet  gneiss from Clemence Massif, Prince Charles Mountains, East Antarctica: U.S. Geological Survey Open-File Report 2007-1047-SRP-062, 9 p., https://doi.org/10.3133/ofr20071047SRP062.","productDescription":"9 p.","additionalOnlineFiles":"N","costCenters":[],"links":[{"id":282697,"type":{"id":24,"text":"Thumbnail"},"url":"https://pubs.usgs.gov/thumbnails/ofr20071047SRP062.png"},{"id":282696,"type":{"id":11,"text":"Document"},"url":"https://pubs.usgs.gov/of/2007/1047/srp/srp062/of2007-1047srp062.pdf"}],"otherGeospatial":"Antarctica;Prince Charles Mountains","geographicExtents":"{ \"type\": \"FeatureCollection\", \"features\": [ { \"type\": \"Feature\", \"properties\": {}, \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [ [ [ 63.18,-73.21 ], [ 63.18,-70.34 ], [ 68.22,-70.34 ], [ 68.22,-73.21 ], [ 63.18,-73.21 ] ] ] } } ] }","noUsgsAuthors":false,"publicationStatus":"PW","scienceBaseUri":"53cd66c3e4b0b29085100f6e","contributors":{"authors":[{"text":"Corvino, A.F.","contributorId":24682,"corporation":false,"usgs":true,"family":"Corvino","given":"A.F.","email":"","affiliations":[],"preferred":false,"id":490846,"contributorType":{"id":1,"text":"Authors"},"rank":1},{"text":"Boger, S.D.","contributorId":53694,"corporation":false,"usgs":true,"family":"Boger","given":"S.D.","email":"","affiliations":[],"preferred":false,"id":490847,"contributorType":{"id":1,"text":"Authors"},"rank":2},{"text":"Wilson, C.J.L.","contributorId":83439,"corporation":false,"usgs":true,"family":"Wilson","given":"C.J.L.","email":"","affiliations":[],"preferred":false,"id":490848,"contributorType":{"id":1,"text":"Authors"},"rank":3}]}}
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