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Structural and sedimentologic patterns of the Wellington Coal Bed, Vancouver Island, British Columbia

C. Gwyneth Cathyl-Bickford
Structural and sedimentologic patterns of the Wellington Coal Bed, Vancouver Island, British Columbia (in Controls on the distribution and quality of Cretaceous coals, Peter J. McCabe (editor) and Judith Totman Parrish (editor))
Special Paper - Geological Society of America (1992) 267: 151-163

Abstract

The Wellington coal bed was deposited in a rapidly subsiding and seismically active forearc basin of Late Cretaceous age, situated along the Pacific margin of North America. Coal-forming peat accumulated atop a complex of nearshore marine sand bars, into which meandering streams were incised. Thick peats with numerous lenses of organic-rich mud were deposited in the channels, while thinner peats were deposited over the bars and between the channels. The location of stream channels, and hence of thick peats, was influenced by movements along faults, which produced scarps at the sand surface. During and subsequent to peat accumulation, streams produced channel scours and overbank flood deposits within the peat, resulting in a complex pattern of splitting and rejoining, which is characteristic of the Wellington coal bed. The position of these streams was controlled by renewed fault movements and by differential compaction over older fluvial deposits within the peat. Detailed mapping of coal bed sections exposed in colliery workings is required to adequately predict the occurrence and extent of coal bed splits in advance of mining. Recognition of the orientation and frequency of the controlling faults is critical to the prediction of mining conditions and coal quality.


ISSN: 0072-1077
EISSN: 2331-219X
Coden: GSAPAZ
Serial Title: Special Paper - Geological Society of America
Serial Volume: 267
Title: Structural and sedimentologic patterns of the Wellington Coal Bed, Vancouver Island, British Columbia
Title: Controls on the distribution and quality of Cretaceous coals
Author(s): Cathyl-Bickford, C. Gwyneth
Author(s): McCabe, Peter J.editor
Author(s): Parrish, Judith Totmaneditor
Affiliation: University of British Columbia, Department of Geological Sciences, Vancouver, BC, Canada
Affiliation: U. S. Geological Survey, Denver, CO, United States
Pages: 151-163
Published: 1992
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 22
Accession Number: 1992-062181
Categories: Petrology of coal
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: sects., strat. cols., 1 table, sketch maps
N48°30'00" - N51°00'00", W128°30'00" - W123°30'00"
Secondary Affiliation: University of Arizona, Department of Geosciences, Tucson, AZ, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 1992
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