Strontium-isotope stratigraphy of the CRP-1 drillhole, Ross Sea, Antarctica

May 9, 2021 0 Comments

first_imgStrontium 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 sedimentsoverlie 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 rangebetween 0.9 and 2.8 cm/k.y. in the Quaternary, and 1.5 and 6.4 cm/k.y. in the lower Miocene.last_img read more