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Stratigraphic relationships of Cretaceous and early Tertiary rocks of a part of northwestern San Juan basin

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Stratigraphic relationships of Cretaceous and early Tertiary rocks of a part of northwestern San Juan basin; 1953; OFR; 53-8; Baltz, Elmer Harold, Jr.

Summary

The Bridge Timber Mountain area in south-central La Plata County, southwestern Colorado lies mostly in the northwestern part of the Central San Juan Basin but contains a segment of the bounding Hogback 'monocline' and Four-Corners platform. The area contains rocks of late Cretaceous through early Eocene age, as well as Pliocene, Pleistocene, and Recent terrace and pediment gravels. The Pictured Cliffs sandstone of late Montana age is the latest marine formation present. Retreat of the Cretaceous seas from the area marked the beginning of Laramide orogenic activity and the earliest stages of deformation which produced the modern San Juan Basin. The Fruitland formation and Kirtland shale were deposited in brackish water and on coastal [...]

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Harvested on Mon Jul 21 14:12:55 MDT 2014 from MODS XML Service

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Type Scheme Key
local-index unknown ofr538
local-pk unknown 12528
series unknown Open-File Report

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journalOpen-File Report
edition-
languageENGLISH
citationTypeReport

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