the Creative Commons Attribution 3.0 License. Special Publication Series Paleomagnetic determination of paleolatitude and rotation of Bering Island (Komandorsky Islands) Russia: comparison with rotations in the Aleutian Islands and Kamchatka
Abstract. A paleomagnetic study was carried out on Pale-ogene sedimentary rocks from Bering Island, Komandorsky islands, located at the far western end of the Aleutian Island Arc. The age of these sediments has been debated at length, but the combination of magnetostratigraphy with the fossil record...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.508.7831 http://www.stephan-mueller-spec-publ-ser.net/4/329/2009/smsps-4-329-2009.pdf |
| Summary: | Abstract. A paleomagnetic study was carried out on Pale-ogene sedimentary rocks from Bering Island, Komandorsky islands, located at the far western end of the Aleutian Island Arc. The age of these sediments has been debated at length, but the combination of magnetostratigraphy with the fossil record indicates that the base of the section is of early Eocene (approximately 55 Ma) and the top latest Eocene age. Pale-omagnetic data were obtained from 260 samples from 60 in-dividual bedding units. The combined data show a clock-wise rotation R=26.3◦±8.5◦, F=8.1◦±2.5 ◦ with respect to the North American Plate and R=38◦±8.8◦, F=8.7◦±2.7◦ with respect to the Eurasian Plate. They also show a shal-lowing of the inclination which yields a paleolatitude of 53◦, 12 ◦ south of its expected latitude. The shallowing may have a component due to compaction, but the wide variation in |
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