Paleomagnetic record from glacial varves in Alto Río Mayo, Patagonia, Argentina
Paleomagnetic study of a 3-m thick sequence containing 302 glacial varves outcropping in Alto Rio Mayo valley shows strong intensities, a declination shifting gradually to the west and an increasing negative inclination. Virtual geomagnetic pole positions reveal a migration of the geomagnetic pole f...
Language: | unknown |
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Published: |
1990
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Online Access: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319201_v61_n3-4_p230_Sylwan https://hdl.handle.net/20.500.12110/paper_00319201_v61_n3-4_p230_Sylwan |
Summary: | Paleomagnetic study of a 3-m thick sequence containing 302 glacial varves outcropping in Alto Rio Mayo valley shows strong intensities, a declination shifting gradually to the west and an increasing negative inclination. Virtual geomagnetic pole positions reveal a migration of the geomagnetic pole from NE Canada-SW Greenland to a position around NW Siberia. The deposit is believed to represent the interval between the recession of the last glacial maximum and a final ice front oscillation, with a readvance in the Alto Río Mayo valley thought to have occurred shortly before 13 500 yr B.P. © 1990. |
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