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Anatomy of a Type II Turbidite Depositional System: Upper Jackfork Group, Degray Lake Area, Arkansas

By
Hisham A. Al-Siyabi
Hisham A. Al-Siyabi
Department of Geology and Geological Engineering, Colorado School of Minesm Golden, Colorado, U.S.A.1
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Published:
January 01, 2000

Abstract

The upper Jackfork Group in the DeGray Lake area, Arkansas, represents a Type II turbidite depositional system with proximal lobes, distal lobes, and channel fills. Diagnostic facies assemblages and sand/shale ratios characterize each of these deposits. In addition, vertical facies arrangements, upward bed thickness trends, and downcurrent bed continuity vary among these deposits.

The depositional setting is divided into three areas: upper fan, transition zone, and middle to lower fan. In these settings, channel fills are envisioned to occur in the upper-fan region. While proximal lobes dominate the transition zone, distal lobes populate the middle- to lower-fan region.

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Contents

AAPG Memoir

Fine-Grained Turbidite Systems

Arnold H. Bouma
Arnold H. Bouma
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Charles G. Stone
Charles G. Stone
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American Association of Petroleum Geologists
Volume
72
ISBN electronic:
9781629812625
Publication date:
January 01, 2000

GeoRef

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