Paleomagnetic and rock magnetic results from the Twin Creek Formation (Middle Jurassic), Wyoming

Details Paleomagnetic and rock magnetic results from the Twin Creek Formation (Middle Jurassic), Wyoming Paleomagnetic and rock magnetic results from the Twin Creek Formation (Middle Jurassic), Wyoming

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982e%26psl..60..140m&link_type=abstract

Earth and Planetary Science Letters, Volume 60, Issue 1, p. 140-146.

Physics

15

Scientific paper

A magnetization which passes the fold test has been observed in 73 limestone samples (10 sites) from the Middle Jurassic Twin Creek Formation. The pole calculated from the site mean poles is located at 68.4°N, 145.0°E (K = 31.8, A95 = 8.7°). This pole lies in a segment of the North American apparent polar wander (APW) path for which there are only a few reliable poles in the literature. The results corroborate earlier studies which conclude that the Jurassic segment of the APW path does not include the present north pole. However, the position of the Twin Creek pole suggests that significantly more APW took place prior to the late Jurassic than previous studies indicated.

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