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| A SOUTHERN-HEMISPHERE RECORD OF THE MATUYAMA-BRUNHES POLARITY REVERSAL |
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| Author(s): CLEMENT BM, KENT DV |
| Source: GEOPHYSICAL RESEARCH LETTERS Volume: 18 Issue: 1 Pages: 81-84 Published: JAN 1991 |
| Times Cited: 44 References: 27 |
| Abstract: We present a record of the Matuyama-Brunhes (0.73 Ma) polarity transition from a southern hemisphere deep-sea sediment core (V16-58; 46-degrees-S, 30-degrees-E). The transition is recorded across at least 30 cm of section and is defined by a nearly 180-degrees change in directions which occurs during a low in the relative intensities. An increase in the Be-10/Be-9 ratios associated with the intensity low suggests that the relative intensities may document a decrease in the strength of the geomagnetic field. The virtual geomagnetic pole (VGP) path is neither clearly near- or far-sided, but tracks approximately 120-degrees west of the site longitude. Considered with other Matuyama-Brunhes transition records, this southern hemisphere record supports previous interpretations that the Matuyama-Brunhes transitional field was not dipolar. Instead, the V16-58 transition together with other records of this reversal recently obtained from this longitudinal sector suggests that nonzonal terms which are symmetric about the equator were important during this transitional field. |
| Document Type: Article |
| Language: English |
| Reprint Address: CLEMENT, BM (reprint author), FLORIDA INT UNIV, DEPT GEOL, MIAMI, FL 33199 USA |
Addresses:
1. COLUMBIA UNIV, DEPT GEOL SCI, PALISADES, NY 10964 USA
2. COLUMBIA UNIV, LAMONT DOHERTY GEOL OBSERV, PALISADES, NY 10964 USA |
| Publisher: AMER GEOPHYSICAL UNION, 2000 FLORIDA AVE NW, WASHINGTON, DC 20009 |
| Subject Category: Geosciences, Multidisciplinary |
| IDS Number: EV010 |
| ISSN: 0094-8276 |
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