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The AAPG/Datapages Combined Publications Database

GCAGS Transactions


Gulf Coast Association of Geological Societies Transactions
Vol. 35 (1985), Pages 381-386

A Preliminary Study of the Relationship Between Test Morphology and Bathymetry in Recent Bolivina Albatrossi Cushman, Northwestern Gulf of Mexico

Anthony C. Gary (1)


An automated video digitizer and closed-form Fourier series Previous HitanalysisNext Hit are used in this study to quantify benthic foraminiferal test morphology. This approach allows morphology to be rapidly, objectively and accurately described, and statistically compared to important environmental variables. Canonical discriminant Previous HitanalysisNext Hit reduced the variable dimensions and revealed specific shape components relatable to bathymetry in Holocene specimens of Bolivina albatrossi Cushman from the northwestern Gulf of Mexico. B. albatrossi exhibits reduced test triangularity and increased surface sculpture relief with increasing water depth. Margin lobateness decreases with increasing depth. A depth classification algorithm using Fourier harmonic amplitudes suggests the bathyal zone may be divided into four subzones. With further development this approach may allow Previous HitpaleoenvironmentalTop reconstructions to be automated and quantified.

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