Abstract
ABSTRACT The Haymond Formation comprising the middle Pennsylvanian strata of the Marathon Basin of West Texas consists of a series of interbedded sandstones, siltstones, shales, and boulder beds which have been interpreted as deep water turbidites deposited in a trench-like area surrounded by tectonically active highlands. Detailed studies of this sequence in conjunction with investigations in the south shore of Lake Erie in western New York, suggest an alternative explanation in which the Haymond is interpreted as a prograding deltaic unit formed from short headed and steep gradient streams in a nearby but not necessarily high source area. Proximity of the source provides an explanation for the turbidite-like character of the delta front portion of the sequence as well as for the presence of the boulder beds in the delta plain deposits.
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