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The AAPG/Datapages Combined Publications Database
GCAGS Transactions
Abstract
Observations on the Composition of Some Miocene and Recent Planktonic Foraminiferal Assemblages
Ralph Biel (1)
ABSTRACT
The composition of planktonic foraminiferal assemblages changes with depth in the present day oceans. The dominant qualitative variable accompanying water depth changes appears to be water temperature. This is a function of either bathymetry or geographical latitude. Therefore, within areas of corresponding latitudes, bathymetry seems the most pertinent factor for distinct compositional patterns of planktonic foraminifers.
It is suggested that these concepts are valid and applicable in interpreting paleobathymetries of marine sediments at least as old as the Lower Miocene. Empirical data are presented showing compositional changes for early Miocene planktonic foraminiferal assemblages in the South Louisiana subsurface. These are comparable to compositional changes in today's oceans.
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