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GEOREF RECORD

Oblique reflection of turbidity currents

Ben Kneller, Deborah Edwards, William McCaffrey and Richard Moore
Oblique reflection of turbidity currents
Geology (Boulder) (March 1991) 19 (3): 250-252

Abstract

Turbidity currents meeting obstacles, for example, the margins of a confined basin, are subject to reflection. The consequent change in flow direction is expressed in the sequence of depositional structures of the resulting bed of sediment. Putative examples of orthogonal reflection have been described, based on 180 degrees opposed current directions. We present field evidence for the more general case of oblique reflection of turbidites, and we report the results of flume experiments indicating a mechanism involving generation of internal solitary waves at an oblique ramp. These propagate normal to the ramp, regardless of the angle of incidence. Flow directions in reflected turbidites may indicate the orientation of reflecting surfaces, such as basin margin slopes, and thus may be of considerable help in paleogeographic and tectonic reconstructions.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 19
Serial Issue: 3
Title: Oblique reflection of turbidity currents
Affiliation: Univ. Leeds, Dep. Earth Sci., Leeds, United Kingdom
Pages: 250-252
Published: 199103
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 17
Accession Number: 1991-016922
Categories: Sedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 1 table, geol. sketch map
N54°15'00" - N54°25'00", W03°04'60" - W02°55'00"
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 1991
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