Late Pleistocene Benthic Foraminifera of the Southern Champlain Sea: Paleotemperature and Paleosalinity Indications
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چکیده
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A late Pleistocene–Holocene noble gas paleotemperature record in southern Michigan
[1] Noble gas temperatures (NGTs) and C derived ages in groundwaters of the Michigan Basin reveal a ground temperature of 1 C toward the end of the Last Glacial Maximum (LGM) suggesting that groundwater recharge occurred under the Laurentide Ice Sheet (LIS) cover. In addition to the general warming observed since the LGM, the NGT record indicates an abrupt warming event between 12.8 and 11.1kyr...
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Larger benthic foraminifera (LBF) are common and diverse throughout the Paleogene sediments of southern Tanzania, but have previously been little studied. A recent programme of onshore drilling known as the Tanzania Drilling Project has recovered large proportion of this succession for palaeoclimatic and palaeontological study. The sediment is largely a hemipelagic clay with secondary gravity s...
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Barium (Ba) incorporated in the calcite of many foraminiferal species is proportional to the concentration of Ba in seawater. Since the open ocean concentration of Ba closely follows seawater alkalinity, foraminiferal Ba /Ca can be used to reconstruct the latter. Alternatively, Ba /Ca from foraminiferal shells can also be used to reconstruct salinity in coastal settings in which seawater Ba con...
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ژورنال
عنوان ژورنال: Atlantic Geology
سال: 1974
ISSN: 1718-7885
DOI: 10.4138/1446