--> ABSTRACT: Paleobiological and Evolutionary Models Based on Quantitative Signal Processing of Morphological Data From Evolving Lineages of Planktonic Foraminifera, by Nancy Healy-Williams, Dwight M. Trainor, and Anthony C. Gary; #91022 (1989)
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Paleobiological and Evolutionary Models Based on Previous HitQuantitativeNext Hit Signal Processing of Morphological Data From Evolving Lineages of Planktonic Foraminifera

Nancy Healy-Williams, Dwight M. Trainor, Anthony C. Gary

In this presentation we demonstrate how Previous HitquantitativeNext Hit signal processing techniques can be used to develop geochronological models based on shape changes in evolving planktonic foraminiferal lineages. For the purposes of illustration, we have objectively defined five morphologic end members within the Sphaeroidinellopsis lineage based on test shape outline using Fourier series Previous HitanalysisNext Hit in closed form. A progressive increase in test triangularity or trilobateness (harmonic 3 amplitude) from EM1 through EM5 represents an evolutionary progression, with EM5 being the earliest ancestor of the lineage and EM1 the most recent descendant.

Of the numerous Previous HitquantitativeNext Hit signal processing procedures available for analyzing micropaleontological and geochemical data in the time and frequency domains, power spectral Previous HitanalysisNext Hit, auto-correlation, cross-correlation, and cross power spectral Previous HitanalysisNext Hit are particularly well suited for resolving biostratigraphic and micropaleontological problems. Using spectral Previous HitanalysisNext Hit, we sought to determine what frequencies are present in the mean harmonic changes in the Sphaeroidinellopsis lineage from the late-middle Miocene through the early Pliocene, approximately 11-3 Ma. How do the frequencies compare from basin to basin, i.e., between five localities in the Caribbean, the Gulf of Mexico, and the eastern Atlantic? Using cross-correlation Previous HitanalysisNext Hit, we sought to quantify the correlation of eve ts, shifts, and long-term trends in the mean harmonics of the Sphaeroidinellopsis lineage. Cross power spectral Previous HitanalysisNext Hit was also used to determine the common frequencies which exist in the Sphaeroidinellopsis lineage.

These results illustrate the exciting potential of using Previous HitquantitativeTop signal processing techniques to increase the confidence and accuracy of (1) geochronological models based on evolving lineages, (2) visual correlations of biostratigraphic data made by micropaleontologists, and (3) interpretations of paleobiological and evolutionary events.

AAPG Search and Discovery Article #91022©1989 AAPG Annual Convention, April 23-26, 1989, San Antonio, Texas.