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Q: How is it possible to use Foraminifera as evidence of glaciation?
A: Changes in foraminiferal assemblages at glacial-interglacial timescale indicate a sequence of three major paleoceanographic events in the study area: (1) The Late Pleistocene (including the Last Glacial Maximum, LGM), [ dominated by a Neogloboquadrina dutertrei – Globorotalia menardii assemblage, indicative of a stable thermocline, stratified water column and greater persistence of warm
equatorial waters in the region. (2) The Termination 1, dominated by a Globigerinita glutinata assemblage, which indicates mixed surface water and transitional conditions between upwelling and stratified water column episodes. Changes in sedimentation rates and a clear reduction of the faunal abundances at this time, could be the result of eustatic sea level change of their diversity, abundance, and complex morphology, fossil foraminiferal assemblages are useful for biostratigraphy, and can accurately give relative dates to rocks. The oil industry relies heavily on microfossils such as forams to find potential oil deposits ]
Expert answered|Marvel2|Points 253|
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Asked 5/3/2013 3:33:03 PM
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