Department: University of Delaware, Department of Geology
Publisher: University of Delaware, Newark.
Date Issued: 1990
Abstract: Amino acid analyses were performed on four planktonic
species of foraminifera and a mixed foraminiferal species
assemblage through the Quaternary section of Ocean Drilling
Program Site 625B in the northeast Gulf of Mexico. The extent of
isoleucine epimerization in the individual species increased with
time as the overall rate of epimerization decreased with time.
Extents of epimerization among the species in increasing order are
Globigerinoides ruber, Orbulina universa, Neogloboquadrina
dutertrei and the Globorotalia tumida-menardii complex. The
mixed foraminiferal species assemblage was found to epimerize at
a rate intermediate to the limits delineated by Globigerinoides
ruber and the Globorotalia tumida-menardii complex.
