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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Petrology and Depositional Environments of the Beck Spring Dolomite (Precambrian), Kingston Range, California
Allan M. Gutstadt
ABSTRACT
The Beck Spring Dolomite (upper Precambrian), Kingston Range, California, is divided into three informal members: lower laminated--150 to 200 m thick, composed of alternating laminae of pelletal and mosaic dolomite; middle oolitic--100 to 150 m thick, composed of mosaic dolomite with oolite, pisolite, and grapestone; and upper cherty--100 to 150 m thick, similar to the middle oolitic member except that it includes stromatolites and has been partially silicified and dedolomitized. Textural evidence suggests that the lower laminated member was deposited in a supratidal environment, and the middle and upper members in shallow, agitated waters of a subtidal environment. The characteristics of the Beck Spring Dolomite are similar to those of sediments now being deposited in parts of the Ba ama Banks.
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