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Paleomagnetic Results from the Perijá Mountains, Venezuela

W. A. Gose, Adrián Perarnau, Jesús Castillo

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Abstract

Abstract Paleomagnetic analyses of 161 samples of Jurassic through Eocene age from 11 sites in the Venezuelan foothills of the Perijá Mountains yield a pole position at 44.1° N, 6.6° E with an error of A 95= 9.6°. These data indicate that the sampling sites underwent a 50° ± 12° clockwise rotation. The rotations are interpreted to be the result of Neogene compression, which caused the rotation of fault-bounded blocks. Model calculations suggest a shortening between 8 km and 20 km across the eastern portion of the Perijá Mountains.

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Abstract Paleomagnetic analyses of 161 samples of Jurassic through Eocene age from 11 sites in the Venezuelan foothills of the Perijá Mountains yield a pole position at 44.1° N, 6.6° E with an error of A 95= 9.6°. These data indicate that the sampling sites underwent a 50° ± 12° clockwise rotation. The rotations are interpreted to be the result of Neogene compression, which caused the rotation of fault-bounded blocks. Model calculations suggest a shortening between 8 km and 20 km across the eastern portion of the Perijá Mountains.

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Available abstract

Abstract Paleomagnetic analyses of 161 samples of Jurassic through Eocene age from 11 sites in the Venezuelan foothills of the Perijá Mountains yield a pole position at 44.1° N, 6.6° E with an error of A 95= 9.6°. These data indicate that the sampling sites underwent a 50° ± 12° clockwise rotation. The rotations are interpreted to be the result of Neogene compression, which caused the rotation of fault-bounded blocks. Model calculations suggest a shortening between 8 km and 20 km across the eastern portion of the Perijá Mountains.

Key concepts: Paleomagnetism, Geology, Memoir, Geography, Tectonics, Subtitle, Plate tectonics, Range (aeronautics)

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