Astronomy and Astrophysics – Astronomy
Scientific paper
May 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003geoji.153..483e&link_type=abstract
Geophysical Journal International, Volume 153, Issue 2, pp. 483-496.
Astronomy and Astrophysics
Astronomy
2
Cryptochrons, Magnetostratigraphy, Miocene, South Atlantic
Scientific paper
U-channel samples from ODP site 1092 in the sub-Antarctic South Atlantic Ocean provide an interpretable magnetic stratigraphy from 1.95 to ~3.6 Ma and from ~5.9 to 13.5 Ma. Although the interpretation is unclear within the Gilbert Chron (C3), the record represents one of the more complete Upper Miocene polarity stratigraphies from the South Atlantic. Eight polarity subchrons that are not included in the standard polarity timescale are identified. Polarity subchron C4r.2r contains a normal-polarity interval that has also been identified in sediments from ODP leg 138. Three short subchrons are recorded within C4n.2n, C5r.3r and C5AAr. The record of C5n.2n contains four short reverse-polarity subchrons of durations estimated to be 3-6 kyr.
Channell James E. T.
Evans Helen F.
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