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Session 6. Deep Sea Facies

January 01, 1978


There is a particular type of sedimentary facies characterized by thick monotonous sequences of laterally extensive inter-bedded sands & shales. The sands tend to show a characteristic suite of structures as shown in figure 43.

This facies sometimes occurs in non-orogenic zones. Where exposure, or well control, is good enough, it is possible to demonstrate that this facies occurs at the foot of deltas and at the base of fault scarps. The palaeotopography of these instances proves that these are deep marine deposits. The absence of in situ shallow water fossils, cross-bedding and evidence of subaerial exposure confirms a depositional environment below wave base.

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AAPG Continuing Education Course Notes Series

Concepts and Methods of Subsurface Facies Analysis

Richard C. Selley
Richard C. Selley
Imperial College London
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American Association of Petroleum Geologists
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Publication date:
January 01, 1978




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