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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
Abstract
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Title: Coal
-Bearing Upper Cretaceous Blackhawk Formation and Star Point Sandstone, Central and Southern Parts of Wasatch Plateau Coalfield, Central Utah: ABSTRACT
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Abstract:
Intertonguing of the lowermost part of the coal
-bearing Blackhawk Formation and the uppermost part of the marginal marine Star point Sandstone has caused a progressive steplike offset of the Blackhawk
coal
beds in the central and southern parts of the Wasatch Plateau. The tongues of the Star Point Sandstone are marginal shore deposits representing episodic transgressions of the Upper Cretaceous epeiric seaway. The development of these sandstone tongues affected the geometry, lateral continuity, and thickness of the associated Blackhawk
coal
beds.
Mapping and exploration of sandstone tongues in the lowermost part of the Blackhawk Formation will help identify the thicker coal
beds. Knowledge of their distribution can assist the exploration geologist in mapping the
coal
-bed geometry. Economic
coal
beds associated with the marginal marine sandstone tongues trend parallel to the paleoshoreline and may be thicker landward of the sandstone tongues. These
coal
beds are the primary targets of current drilling programs directed toward exploration and development of Blackhawk coals in the study area.
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