Browsing by Author "Schweitzer, Mary Higby"

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Environmental Factors Affecting Feather Taphonomy
(MDPI AG, 2022-05) Schweitzer, Mary Higby; Zheng, Wenxia; Equall, Nancy
The exceptional preservation of feathers in the fossil record has led to a better understanding of both phylogeny and evolution. Here we address factors that may have contributed to the preservation of feathers in ancient organisms using experimental taphonomy. We show that the atmospheres of the Mesozoic, known to be elevated in both CO2 and with temperatures above present levels, may have contributed to the preservation of these soft tissues by facilitating rapid precipitation of hydroxy- or carbonate hydroxyapatite, thus outpacing natural degradative processes. Data also support that that microbial degradation was enhanced in elevated CO2, but mineral deposition was also enhanced, contributing to preservation by stabilizing the organic components of feathers.
Microstructural, elemental and biomolecular preservation of Tyrannosaurus rex cancellous tissues
(Montana State University - Bozeman, College of Letters & Science, 1995) Schweitzer, Mary Higby; Chairperson, Graduate Committee: John R. Horner; Robert E. Moore (co-chair)