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Architectural Patterns in Large-Scale Gilbert-Type Delta Complexes, Pleistocene, Gulf of Corinth, Greece

By
Gian gabriele Ori
Gian gabriele Ori
Dipartimento di Scienze Geologiche, Università di Bologna, Via Zamboni 67, 40127 Bologna, Italy
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Marco Roveri
Marco Roveri
Istituto per la Geologia Marina, CNR, Via Zamboni 63, 40127 Bologna, Italy
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Gary Nichols
Gary Nichols
Department of Geology, Royal Holloway and Bedford New College, University of London, Egham, Surrey TW 20 OEX, United Kingdom
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Published:
January 01, 1991

Abstract

Large-scale Gilbert-type delta deposits occur on the southern side of the Gulf of Corinth in Greece. They accumulated adjacent to the very steep margins of listric-fault blocks. The deltaic complexes consist of very thick (up to 700 m) foreset packages that pass into bottomset strata, which, in turn. pass into thin-bedded turbidites. Topset deposits are well preserved and are the keys to interpreting the fan-delta bodies in architectural terms. The geometric pattern is discussed in terms of accommodation, that is the vertical space made available for the sedimentation. Where there is no accommodation, the topset environment is bypassed and, geometrically, toplap boundaries occur. With increasing accommodation, fluvial topset strata are formed: they pass downdip into the foreset beds. At higher accommodation values, transgressive deposits occur. If accommodation is too high, the transgressive sediments are drowned and foreset beds form on top.

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Contents

Concepts in Sedimentology and Paleontology

The Three-Dimensional Facies Architecture of Terrigenous Clastic Sediments and its Implications for Hydrocarbon Discovery and Recovery

Andrew D. Miall
Andrew D. Miall
Geology Department, University of Toronto, Toronto, Ontario M5S 3B1, Canada
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Noel Tyler
Noel Tyler
Bureau of Economic Geology, The University of Texas at Austin, Austin, Texas 78713-7508 U.S.A.
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SEPM Society for Sedimentary Geology
Volume
3
ISBN electronic:
9781565762268
Publication date:
January 01, 1991

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