The Cretaceous Williams Fork Formation contains stratal packages that represent the final stage of deposition within the Cretaceous Western Interior foreland basin (Colorado). These stratal packages record changes in accommodation through time and are interpreted using a sequence-stratigraphic approach. The formation is divided into three units based on changes in stratal packaging and accommodation style. Unit 1 contains aggradationally stacked parasequences interpreted to represent deposition during highstand systems tracts. Units 2 and 3 both contain stacked, repetitive stratal packages interpreted as depositional sequences. Depositional sequences contain lowstand, transgressive and highstand systems tracts. A complicated interplay between eustatic oscillations and tectonic subsidence controls deposition of the stratal packages and depositional sequences. Eustatic oscillations control deposition of depositional sequences while tectonic subsidence forms the accommodation necessary to preserve multiple stacked stratal packages. The overall change in accommodation style from Units 1–3 records a decrease in accommodation through time interpreted to represent a decrease in the rate of tectonic subsidence.
|Advisor:||Kamola, Diane L.|
|Commitee:||Stockli, Daniel F., Walton, Anthony W.|
|School:||University of Kansas|
|School Location:||United States -- Kansas|
|Source:||MAI 51/05M(E), Masters Abstracts International|
|Subjects:||Geology, Sedimentary Geology|
|Keywords:||Fluvial, Piceance basin, Sequence stratigraphy, Stratal patterns|
Copyright in each Dissertation and Thesis is retained by the author. All Rights Reserved
The supplemental file or files you are about to download were provided to ProQuest by the author as part of a
dissertation or thesis. The supplemental files are provided "AS IS" without warranty. ProQuest is not responsible for the
content, format or impact on the supplemental file(s) on our system. in some cases, the file type may be unknown or
may be a .exe file. We recommend caution as you open such files.
Copyright of the original materials contained in the supplemental file is retained by the author and your access to the
supplemental files is subject to the ProQuest Terms and Conditions of use.
Depending on the size of the file(s) you are downloading, the system may take some time to download them. Please be