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"name": "Late Cenozoic Climate History of the Ross Embayment from the AND-1B Drill Hole: Culmination of Three Decades of Antarctic Margin Drilling",
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"value": 70059624
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"value": "10.3133/ofr20071047KP07",
"url": "https://doi.org/10.3133/ofr20071047KP07"
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"datePublished": "2007",
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"abstract": "Because of the paucity of exposed rock, the direct physical \nrecord of Antarctic Cenozoic glacial history has become \nknown only recently and then largely from offshore shelf \nbasins through seismic surveys and drilling. The number \nof holes on the continental shelf has been small and largely \nconfined to three areas (McMurdo Sound, Prydz Bay, and \nAntarctic Peninsula), but even in McMurdo Sound, where \nOligocene and early Miocene strata are well cored, the late Cenozoic is poorly known and dated. The latest Antarctic \ngeological drilling program, ANDRILL, successfully cored \na 1285-m-long record of climate history spanning the last 13 \nm.y. from subsea-floor sediment beneath the McMurdo Ice \nShelf (MIS), using drilling systems specially developed for \noperating through ice shelves. The cores provide the most \ncomplete Antarctic record to date of ice-sheet and climate \nfluctuations for this period of Earth\u2019s history. The >60 cycles \nof advance and retreat of the grounded ice margin preserved \nin the AND-1B record the evolution of the Antarctic ice sheet \nsince a profound global cooling step in deep-sea oxygen \nisotope records ~14 m.y.a. A feature of particular interest is a \n~90-m-thick interval of diatomite deposited during the warm \nPliocene and representing an extended period (~200,000 \nyears) of locally open water, high phytoplankton productivity, and retreat of the glaciers on land.",
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"name": "National Academies Press"
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