Articles | Volume 34, issue 1
01 Jan 2015
 | 01 Jan 2015

Effect of diagenetic recrystallization on the strength of planktonic foraminifer tests under compression

Paul N. Pearson, Sam L. Evans, and James Evans

Keywords: foraminifera, diagenesis, Tanzania, ODP Site 865

Abstract. We present the results of experiments to measure the brittle failure of fossil planktonic foraminifer tests under compression. We compare two upper Eocene species of contrasting morphology, Cribrohantkenina inflata (Howe, 1928) and Turborotalia cerroazulensis (Cole, 1928) in both well-preserved material from the Kilwa Group of Tanzania and recrystallized material from ODP Site 865, central Pacific Ocean. Well-preserved tests were several times stronger than recrystallized tests. Turborotalia cerroazulensis was stronger than C. inflata in both the well-preserved and recrystallized material.