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Depositional Environments and Sedimentary Geology Splits, Partings, Rider Coals, and Subseams

By
Alexander R. Papp
Alexander R. Papp
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Published:
January 01, 1998

Abstract

The depositional environments of coal-bearing strata are dynamic systems and, therefore, splits are common in the sequence (Pictures 1 and 2). High-energy channels (framework facies), which transport sediment, can occur adjacent to areas of low energy or quiescence, such as a peat swamp (see Depositional Systems, Volume 1). With suitable subsidence rates and no interruptions, the swamp can accumulate a considerable thickness of peat, subsequently forming a thick seam of coal. In contrast, the swamp could be inundated with sediment by flooding (Picture 3) or breach of the channel levee (i.e., flood plain and crevasse splay deposits of the non-framework facies) or by lateral migration of the adjacent channel facies. Depending on the subsequent depositional conditions, the swamp could reestablish over the sediment package forming a "split" in the coal seam.

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AAPG Studies in Geology

Atlas of Coal Geology

Alexander R. Papp
Alexander R. Papp
Certified Coal Geologist
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James C. Hower
James C. Hower
Certified Coal Geologist
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Douglas C. Peters
Douglas C. Peters
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American Association of Petroleum Geologists
Volume
45
ISBN electronic:
9781629810195
Publication date:
January 01, 1998

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