Data report: Strontium isotope dating of barnacle fragments: Antarctic Peninsula Site 1103
Strontium isotope ratios from multiple plates of two barnacle fragments from Site 1103 (Ocean Drilling Program Leg 178) provide maximum age estimates for the oldest glacial sedimentary package drilled. Three moderately preserved barnacle fragments from 262.63 meters below
seafloor (mbsf) yielded a mean best-fit age of 7.4 Ma. A single, wellpreserved fragment from the same horizon yielded a best-fit age of 12.2 Ma. Two moderately preserved fragments from 262.98 mbsf yielded a mean best-fit age of 7.8 Ma. The calculated mean strontium ages of 7.8 and 7.4 Ma agree well with the diatom estimates of 8.68 to 5.89 Ma for the underlying sediments.
Authors: Lavelle, Mark, Barker, Peter F., Osterman, Lisa E.
Editors: Barker, Peter F., Camerlenghi, Angelo, Acton, Gary D., Ramsay, Anthony T.S.
1 January, 2002
In: Barker, Peter F., Camerlenghi, Angelo, Acton, Gary D., Ramsay, Anthony T.S. (eds.). Antarctic glacial history and sea-level change, College Station, Texas, Ocean Drilling Program, 8 pp.