Paleomagnetic contributions to IODP Wilkes Land Expedition (318) science
Abstract
Paleo- and rock magnetic investigations of sediments recovered from the Antarctic Margin off Wilkes Land during IODP Expedition 318 contributed significantly in a variety of ways toward achieving expedition goals. Magnetostratigraphy, combined with biostratigraphic constraints serves as the backbone for a well constrained chronostratigraphic framework. Sediments recovered include the early Eocene, nearly the entire Oligocene including the Oligo/Miocene boundary, the middle and late Miocene, the entire Pliocene and the Pleistocene from below the Jaramillo. The chronostratigraphic framework provides tight bounds on the duration and placement of several key hiati seen across the Antarctic Margin. A complete Pliocene record will also allow a major revision in the calibration of the diatom biostratigraphic time scale. In addition to magnetostratigarphy, rock magnetic data inform discussions of climatic change on the Wilkes Land Margin.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2011
- Bibcode:
- 2011AGUFMGP53A..03T
- Keywords:
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- 1520 GEOMAGNETISM AND PALEOMAGNETISM / Magnetostratigraphy;
- 1535 GEOMAGNETISM AND PALEOMAGNETISM / Reversals: process;
- timescale;
- magnetostratigraphy