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Sedimentological and ichnological characteristics of modern and ancient channel-fills, Willapa Bay, Washington Open Access


Other title
inclined heterolithic stratification
Willapa Bay
eta cross-stratification
Type of item
Degree grantor
University of Alberta
Author or creator
Schoengut, Jesse
Supervisor and department
Gingras, Murray (Earth and Atmospheric Sciences)
Examining committee member and department
Acorn, John (Renewable Resources)
Pemberton, S. George (Earth and Atmospheric Sciences)
Zonneveld, John-Paul (Earth and Atmospheric Sciences)
Department of Earth and Atmospheric Sciences

Date accepted
Graduation date
Master of Science
Degree level
Estuarine-associated facies make up a significant component of ancient geological systems, and are exceedingly economically important today for their ability to trap hydrocarbons. While many aspects of estuaries are understood today, little is documented regarding the sedimentological and ichnological character of middle and inner estuary channel-fill deposits. These deposits are associated with deposition in entrenched, almost fully marine tidal channels, and are deposited across the width of the channel as a combination of inclined heterolithic and heterolithic strata. Willapa Bay provides an excellent locale to compare ancient channel-fill deposits present in Pliocene to Pleistocene-aged terrace deposits to modern examples from tidal channels. Sedimentological and ichnological criteria for these channel-fills will be discussed, as will vertical profiles, lateral trends, and the depositional affinity and character of these channel-fills. Because channel-fills vary in a transitional and predictable fashion, they act as excellent palaeogeographical indicators when discerning ancient estuarine environments.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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