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Oligocene alkaline igneous activity in NE Mexico

Published online by Cambridge University Press:  01 May 2009

K. Bloomfield and
L. Cepeda-Davila
K. Bloomfield
Affiliation:
Instituto de Geología Universidad Nacional Autónoma de México México 20, D.F. México
L. Cepeda-Davila
Affiliation:
Instituto de Geología Universidad Nacional Autónoma de México México 20, D.F. México
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Summary

Potassium-argon age determinations on rocks from the Sierra de San Carlos, State of Tamaulipas, México, which are petrographically very similar to other bodies in north-eastern México and the south-central U.S.A., indicate that a NW-trending zone of alkaline complexes, at least 1,400 km in length, stretches from the Gulf coast to southern New Mexico. This zone may be structurally related to the parallel, but somewhat younger, Rio Grande rift.

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Type
Articles
Information
Geological Magazine , Volume 110 , Issue 6 , November 1973, pp. 551 - 555
Copyright
Copyright © Cambridge University Press 1973

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