Zobrazeno 1 - 10
of 71
pro vyhledávání: '"J. Platt Bradbury"'
Autor:
J. Platt Bradbury, Paul A. Baker, Michelle R. Warren, Catherine A. Rigsby, Stephanie M. Rollins
Publikováno v:
Journal of Quaternary Science. 20:671-691
Drill cores of sediments from the Rio Desaguadero valley, Bolivia, provide new information about the climate of tropical South America over the past 50 000 years. The modern Rio Desaguadero is fed by Lake Titicaca overflow (and by local tributaries)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::265ea00b9124fb2065a21f217b693060
https://doi.org/10.1002/jqs.986
https://doi.org/10.1002/jqs.986
Autor:
John P. McGeehin, Charles W. Holmes, Andrei M. Sarna-Wojcicki, David Edginton, Steven M. Colman, J. Platt Bradbury
Publikováno v:
Journal of Paleolimnology. 31:139-149
A combination of tephrochronology and 14 C, 210 Pb, and 137 Cs measurements provides a robust chronology for sedimentation in Upper Klamath Lake during the last 45 000 years. Mixing of surficial sediments and possible mobility of the radio-isotopes l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6d944fd38054724221e2982d35904e88
https://doi.org/10.1023/b:jopl.0000019234.05899.ea
https://doi.org/10.1023/b:jopl.0000019234.05899.ea
Publikováno v:
Journal of Paleolimnology. 31:151-165
Hypereutrophic Upper Klamath Lake has been studied for almost 50 years to evaluate the nature, cause, and effects of its very productive waters. Mitigation of undesirable effects of massive cyanobacterial blooms requires understanding their modern ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::929393f51ebc7ee08448913fee349d3d
https://doi.org/10.1023/b:jopl.0000019233.12287.18
https://doi.org/10.1023/b:jopl.0000019233.12287.18
Autor:
Josh Rapp, Joseph G. Rosenbaum, Michael W. Kerwin, Steven M. Colman, Richard L. Reynolds, David P. Adam, J. Platt Bradbury
Publikováno v:
Journal of Paleolimnology. 31:217-233
Petrological and textural properties of lacustrine sediments from Upper Klamath Lake, Oregon, reflect changing input volumes of glacial flour and thus reveal a detailed glacial history for the southern Cascade Range between about 37 and 15 ka. Magnet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6232f8c73da325ccb2e312c6d8039207
https://doi.org/10.1023/b:jopl.0000019230.42575.03
https://doi.org/10.1023/b:jopl.0000019230.42575.03
Publikováno v:
Journal of Paleolimnology. 31:167-188
Upper Klamath Lake, in south-central Oregon, contains long sediment records with well-preserved diatoms and lithological variations that reflect climate-induced limnological changes. These sediment archives complement and extend high resolution terre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af80e2733cf8df24f8c4ffd2c08f01aa
https://doi.org/10.1023/b:jopl.0000019232.74649.02
https://doi.org/10.1023/b:jopl.0000019232.74649.02
Publikováno v:
Journal of Paleolimnology. 31:129-138
The subsiding Upper Klamath Lake Basin contains sediments that were continuously deposited in a shallow, freshwater lake for more than 40 000 years. Well dated by radiometric methods and containing volcanic ashes of known age, these sediments constit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c8e84b8caaea66e079d89e519ad421af
https://doi.org/10.1023/b:jopl.0000019235.72107.92
https://doi.org/10.1023/b:jopl.0000019235.72107.92
Publikováno v:
Quaternary Research. 60:110-122
Recent stratigraphic studies in central Alaska have yielded the unexpected finding that there is little evidence for full-glacial (late Wisconsin) loess deposition. Because the loess record of western Alaska is poorly exposed and not well known, we a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c667f898e7e1787a2b53cf00bd92259
https://doi.org/10.1016/s0033-5894(03)00062-0
https://doi.org/10.1016/s0033-5894(03)00062-0
Autor:
Vera Markgraf, Stephen J. Burns, J. Platt Bradbury, Scott Stine, Nora I. Maidana, Daniel Ariztegui, Charles R. Stern, Antje Schwalb, Adrian Gilli, Flavio S. Anselmetti
Publikováno v:
The Holocene. 13:581-591
Multiproxy palaeoenvironmental and palaeolimnological analyses of two Holocene-age sediment cores from the margin of Lago Cardiel, a 76 m deep, closed-basin lake in southern Patagonia (latitude 49°S), provide information on lake-level changes that c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0dba59ab346c4c5a95c8ae82a0dea5c3
https://doi.org/10.1191/0959683603hl648rp
https://doi.org/10.1191/0959683603hl648rp
Publikováno v:
Quaternary Science Reviews. 21:1763-1775
Elk Lake, in northwestern Minnesota, contains numerous proxy records of climatic and environmental change contained in varved sediments with annual resolution for the last 10,000 years. These proxies show that about 8200 calendar years ago (8.2 cal.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a01d461ccc1e9b9c9f0db064b26a153b
https://doi.org/10.1016/s0277-3791(02)00002-1
https://doi.org/10.1016/s0277-3791(02)00002-1
Publikováno v:
Journal of Paleolimnology. 27:287-299
The deepest part (29.5 m) of Elk Lake, ClearwaterCounty, northwestern Minnesota, contains a complete Holocene section that iscontinuously varved. The varve components are predominantly autochthonous(CaCO3, organic matter, biogenic silica, and several
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7bfd52d04a224852961c15f0c9a3f5dd
https://doi.org/10.1023/a:1016062207440
https://doi.org/10.1023/a:1016062207440