Magneto-stratigraphic studies in Neogene deposits of Taylor Valley and McMurdo Sound, Antarctica
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Abstract
Magnetic polarity and susceptibility zonations obtained from drill cores have served to refine temporal correlations in glaciogenic sections cored in eastern Taylor Valley. The zonations have led to a better understanding of the glacial and structural history for an interval of time that extends from the late Miocene (about 7 m.y. ago) to perhaps near the end of the Pliocene (- 2.4 to 1.8 m.y.). However polarity data from a core drilled in McMurdo Sound (hole MSSTS-I) were found to be less useful. In this core, normal and reverse polarity deposits of Holocene, Pleistocene, and Pliocene age are nearly 40 m thick and appear to unconformably overlie strata assigned to the middle Miocene on the basis of a reworked fauna and flora. Gaps in the stratigraphic coverage of the Miocene strata, and two intervals in which the magnetisation post-dates deposition, however, have made development of a reliable polarity zonation impossible, and no firm correlation could be made with the magnetic polarity time scale.
Publication type | Article |
---|---|
Publication Subtype | Journal Article |
Title | Magneto-stratigraphic studies in Neogene deposits of Taylor Valley and McMurdo Sound, Antarctica |
Series title | Journal Royal Society New Zealand |
DOI | 10.1080/03036758.1981.10423337 |
Volume | 11 |
Issue | 4 |
Year Published | 1981 |
Language | English |
Publisher | Taylor & Francis |
Description | 6 p. |
First page | 481 |
Last page | 486 |
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