Strontium-isotope stratigraphy of the CRP-1 drillhole, Ross Sea, Antarctica
Strontium isotope stratigraphy was used to date five discrete horizons within CRP- 1. Early and late Quaternary (0 87- 1 3 Ma and 0-0 67 Ma respectively) age sediments
overlie a major sequence boundary at 43.15 meters below sea floor (mbsf) This hiatus is estimated to account for -16 m y of missing section. Early Miocene (16 6-20 8-25 Ma)
age deposits below this boundary are in turn cut by multiple erosion surfaces representing hiatuses of between 0.2 and 1.2 m.y. Estimated minimum sedimentation rates range
between 0.9 and 2.8 cm/k.y. in the Quaternary, and 1.5 and 6.4 cm/k.y. in the lower Miocene.
Authors: Lavelle, M.
1 January, 1998
Terra Antartica / 5