STRATIGRAPHY AND PALYNOLOGY OF THE ALBIAN-CENOMANIAN DAKOTA FORMATION AND MOWRY SHALE, UINTA BASIN, UTAH AND COLORADO

STRATIGRAPHY AND PALYNOLOGY OF THE ALBIAN-CENOMANIAN DAKOTA FORMATION AND MOWRY SHALE, UINTA BASIN, UTAH AND COLORADO

Bibliographic Details
Main Author: Pierson, Justin Scott
Language:English
Published: Miami University / OhioLINK 2009
Subjects:
Geology
Stratigraphy
Palynology
Cretaceous
Dakota Formation
Mowry Shale
Uinta Basin
Utah
Colorado
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=miami1259165683
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-miami12591656832021-08-03T05:40:48Z STRATIGRAPHY AND PALYNOLOGY OF THE ALBIAN-CENOMANIAN DAKOTA FORMATION AND MOWRY SHALE, UINTA BASIN, UTAH AND COLORADO Pierson, Justin Scott Geology Stratigraphy Palynology Cretaceous Dakota Formation Mowry Shale Uinta Basin Utah Colorado <p>The Albian-Cenomanian Dakota Formation and Mowry Shale of the Uinta Basin consist of an overall transgressive sequence of continental and marine strata that were deposited in the medial part of the Cordilleran foreland-basin system. However, complex stratigraphic relationships within the Dakota Formation and Mowry Shale, as well as complexities between both older and younger strata, have led to different interpretations regarding the large-scale stratigraphic architecture of the basin. In order to provide a better understanding of the overall stratigraphic relationships between the Albian-Cenomanian rocks of the region, palynological samples from the Dakota Formation, Mowry Shale, and overlying units were collected from the northern and southern margins of the Uinta Basin. When combined with preexisting biostratigraphic studies and regional stratigraphic correlations of the Dakota-Mowry interval, this data can be used to construct a unifying stratigraphic model for Dakota and Mowry deposition.</p><p> Results of this study indicate that Dakota Formation contains three, unconformity-bound depositional sequences. The first Dakota sequence is late Albian in age and was deposited above a regional unconformity that can be traced throughout the Uinta Basin. The second Dakota sequence was deposited above a second regional unconformity that formed during latest Albian time. In the northern part of the Uinta Basin, nonmarine deposition of second Dakota sequence was confined to the late Albian. Early Cenomanian-aged marine deposits of the overlying Mowry Shale comprise the upper parts of the sequence. In the southern part of the basin, the second Dakota sequence is entirely nonmarine. A regional decrease in relative sea level at the end of early Cenomanian time resulted in the development of a regional unconformity throughout the study area. In the southern Uinta Basin, incised fluvial channel complexes of the third Dakota sequence lie above the unconformity. The third Dakota sequence in this region is capped by the middle Cenomanian-Turonian Tununk Member of the Mancos Shale In the northern part of the basin, nonmarine deposits of the third Dakota sequence are absent. In this region the unconformity is situated at the erosional contact between the Mowry Shale and the middle Turonian Tununk Member.</p> 2009-12-01 English text Miami University / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=miami1259165683 http://rave.ohiolink.edu/etdc/view?acc_num=miami1259165683 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Geology
Stratigraphy
Palynology
Cretaceous
Dakota Formation
Mowry Shale
Uinta Basin
Utah
Colorado
spellingShingle Geology
Stratigraphy
Palynology
Cretaceous
Dakota Formation
Mowry Shale
Uinta Basin
Utah
Colorado
Pierson, Justin Scott
STRATIGRAPHY AND PALYNOLOGY OF THE ALBIAN-CENOMANIAN DAKOTA FORMATION AND MOWRY SHALE, UINTA BASIN, UTAH AND COLORADO
author Pierson, Justin Scott
author_facet Pierson, Justin Scott
author_sort Pierson, Justin Scott
title STRATIGRAPHY AND PALYNOLOGY OF THE ALBIAN-CENOMANIAN DAKOTA FORMATION AND MOWRY SHALE, UINTA BASIN, UTAH AND COLORADO
title_short STRATIGRAPHY AND PALYNOLOGY OF THE ALBIAN-CENOMANIAN DAKOTA FORMATION AND MOWRY SHALE, UINTA BASIN, UTAH AND COLORADO
title_full STRATIGRAPHY AND PALYNOLOGY OF THE ALBIAN-CENOMANIAN DAKOTA FORMATION AND MOWRY SHALE, UINTA BASIN, UTAH AND COLORADO
title_fullStr STRATIGRAPHY AND PALYNOLOGY OF THE ALBIAN-CENOMANIAN DAKOTA FORMATION AND MOWRY SHALE, UINTA BASIN, UTAH AND COLORADO
title_full_unstemmed STRATIGRAPHY AND PALYNOLOGY OF THE ALBIAN-CENOMANIAN DAKOTA FORMATION AND MOWRY SHALE, UINTA BASIN, UTAH AND COLORADO
title_sort stratigraphy and palynology of the albian-cenomanian dakota formation and mowry shale, uinta basin, utah and colorado
publisher Miami University / OhioLINK
publishDate 2009
url http://rave.ohiolink.edu/etdc/view?acc_num=miami1259165683
work_keys_str_mv AT piersonjustinscott stratigraphyandpalynologyofthealbiancenomaniandakotaformationandmowryshaleuintabasinutahandcolorado
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