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The AAPG/Datapages Combined Publications Database

AAPG Bulletin


Volume: 14 (1930)

Issue: 4. (April)

First Page: 403

Last Page: 410

Title: McLure Shale of the Coalinga Region, Fresno and Kings Counties, California

Author(s): Gerard Henny (2)


The McLure shale is a name given by the writer to the brown shale of the southern Coalinga region, previously termed Santa Margarita (?) shale on the geological maps of the U. S. Geological Survey. It is found, however, that this shale lies with an angular unconformity on Santa Margarita sandstone (Miocene), and that the Etchegoin (Pliocene) lies unconformably on the shale. Whether it is upper Miocene or lowest Pliocene in age has not been determined. In view of these recent observations, a new name for the shale is imperative.

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