Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 9 of 9 for “"Stratigraphic--Paleocene"”.
-
Stratigraphy and sedimentology of the Sentinel Butte formation (Paleocene) near Lost Bridge, Dunn County, west-central North Dakota
<p>The Sentinel Butte Formation (Paleocene) near Lost Bridge, Dunn County, west-central North Dakota, is 190 meters thick, and is charac terized by four main lithologies: sand, silt, clay, and lignite. The study interval is ISO meters thick, and lies between the basal sand of the formation and the …
-
A stratigraphic and sedimentologic analysis of the Tongue River and Sentinel Butte Formations (Paleocene), western North Dakota
… within a relatively homogeneous sequence of Paleocene strata. Consequently, the Sentinel Butte has come to be regarded as a subordinate unit of the ”Tongue River Formation. As defined in report, the contact is a distinctive horizon between two discrete lithogenetic units. It characterized by …
-
The stratigraphy and geologic history of the Cannonball Formation (Paleocene)
<p>The purpose of this report is to describe the stratigraphy of the Cannonball formation in southwestern North Dakota, and to present a new geologic map of the formation in Oliver, McLean, Burleigh, and Emmons Counties, North Dakota.</p>
-
Petrology of the Sentinel Butte Formation (Paleocene), North Dakota
… formation indicates that volcanism accompanied Paleocene sedimentation and that volcanic glass can be preserved for longer periods of geologic time than commonly thought possible. The manner of preservation of the bentonite/ ash unit makes it ideally suited for testing the usefulness of chemical …
-
Distribution and origin of elongate sandstone concretions, Bullion Creek and slope formations (Paleocene), Adams County, North Dakota
… and recur vertically, ruling out their use as stratigraphic markers. In some areas, individual elongate concretions are laterally connected, forming a tabular bed with aligned "pinchings" and "swellings." This indicates an advanced stage of concretion growth. The concretions do not contain a …
-
The stratigraphy and sedimentology of the Sentinel Butte Formation (Paleocene) in south-central Williams County, North Dakota
<p> Approximately 163 meters (535 feet) of the Paleocene Sentinel Butte Formation crop out in southcentral Williams county, North Dakota. To determine their mode of deposition and stratigraphic position within the formation, twelve stratigraphic sections were measured. These strata were deposited …
-
A survey of 24 elements in North Dakota lignite (Fort Union Group, Paleocene) and possible geologic implications
Calystone, carbonaceous shale, lignitic shale, and lignite samples were collected from western North Dakota for element analysis during May 1978, April 1979, and August 1979. Lignite was collected from the Sentinel Butte Formatlon--Hagel Bed (Oliver and McClean Counties), Beulah-Zap Bed (Mercer …
-
Paleocene coal-bearing sediments of the Williston Basin, North Dakota : an interaction between fluvial systems and an intracratonic basin
… sedimentation intervals were identified for the Paleocene Bullion Creek and Sentinel Butte Formations. The intervals extend from the top of the Harmon coal (lower Bullion Creek) to the top of the Twin Buttes coal (upper Sentinel Butte). Each interval consists of medium and fine elastics …
-
Depositional environments of a portion of the Bullion Creek Formation (Paleocene), Western Billings County, North Dakota
<p> The Bullion Creek Formation (Paleocene) in North Dakota is part of an Upper Cretaceous to Eocene wedge of siliciclastic rocks formed during uplift associated with the Laramide Orogeny. The Bullion Creek Formation consists predominantly of mudrocks , with fine-grained sandstone, lignite, and …