Evidence for a Possible Late Pliocene Impact in the Ross Sea , Antarctica
نویسندگان
چکیده
bott, Dee Breger, and Lloyd Burckle Lamont-Doherty Earth Observatory, Columbia University, 61 Route 9W Palisades, NY 10964. [email protected] Lamont-Doherty Earth Observatory. [email protected] Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104 [email protected] Lamont-Doherty Earth Observatory, Columbia University 61 Route 9W Palisades, NY 10964 [email protected]
منابع مشابه
Diatom Evidence for the Onset of Pliocene Cooling from AND-1B, McMurdo Sound, Antarctica
The late Pliocene, ~3.3–3.0 Ma, is the most recent interval of sustained global warmth in the geologic past. This window is the focus of climate reconstruction efforts by the U.S. Geological Survey’s Pliocene Research, Interpretation, and Synoptic Mapping (PRISM) Data/Model Cooperative, and may provide a useful climate analog for the coming century. Reconstructions of past surface ocean conditi...
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The influence of Antarctica and the Southern Ocean on Late Pliocene global climate reconstructions has remained ambiguous due to a lack of well-dated Antarctic-proximal, paleoenvironmental records. Here we present ice sheet, sea-surface temperature, and sea ice reconstructions from the ANDRILL AND-1B sediment core recovered from beneath the Ross Ice Shelf. We provide evidence for a major expans...
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The late Pliocene – early Pleistocene sediment record in the AND-1B core from the McMurdo Sound, Ross Sea, Antarctica, displays a rich diversity and high abundance of diatoms, including several new morphologies within the genus Fragilariopsis. These new morphologies exhibit similarities to the extinct late Miocene/early Pliocene species Fragilariopsis aurica Gersonde and Fragilariopsis praecurt...
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A late Pliocene – early Pleistocene, 2.9–2.0Ma, diatom record from the Antarctic Geological Drilling Program (ANDRILL) MIS drillcore AND-1B is presented. This core, recovered from beneath the Ross Ice Shelf south of Ross Island, comprises multiple diatomaceous-sediment units deposited during interglacial periods with open water over the core site. These represent interglacial phases of orbitall...
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