A reappraisal of the geomagnetic polarity time scale to 4 Ma using data from the Turkana Basin, East Africa

Details A reappraisal of the geomagnetic polarity time scale to 4 Ma using data from the Turkana Basin, East Africa A reappraisal of the geomagnetic polarity time scale to 4 Ma using data from the Turkana Basin, East Africa

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19.2349m&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 23, p. 2349-2352.

Astronomy and Astrophysics

Astronomy

37

Geochronology, Geomagnetism, Paleomagnetism, Radioactive Age Determination, Argon Isotopes, Chemical Composition, Potassium, Sediments, Stratigraphy, Structural Basins

Scientific paper

Recalibration of the Pliocene and early Pleistocene geomagnetic time scale using the K-Ar dated fluvial sequence of the Turkana Basin in East Africa agrees with calibrations based on astronomical calculations. Ages estimated here are: Olduvai Subchron, 1.78-1.96 Ma; Reunion Subchrons, 2.11-2.15 Ma and 2.19-2.27 Ma; Matuyama-Gauss boundary, 2.60 Ma; Kaena Subchron 3.02-3.09 Ma; Mammoth Subchron, 3.21-3.29 Ma; Gauss-Gilbert boundary, 3.57 Ma.

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