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 17 of 17 for “"Epeiric sea"”.
-
Sm-Nd and C-isotope chemostratigraphy of Ordovician epeiric sea carbonates, midcontinent of North America
Interpreting and correlating epeiric sea sequences is key to understanding ancient marine environments. As a result, eNd, d13C and Sm/Nd profiles are developed as tools for interpreting epeiric sea carbonates. Previously, eNd and d13C profiles in epeiric sea carbonates have been used to study …
-
The geology and hydrocarbon potential of the Dawson Bay Formation carbonate unit (Middle Devonian), Williston Basin, North Dakota
… energy zones as follows: shallow epieric sea (very low energy), stromatoporoid biostrome/bioherm (low energy), very shallow epeiric sea (very low energy), restricted shallow epeiric sea (extremely low energy), and shallow epeiric sea shoreline (variable energy).</p> <p>Eogenetic diagenesis …
-
Stratigraphy and depositional environments of the Three Forks Formation (Upper Devonian), Williston Basin, North Dakota
… of the Three Forks Formation occurred in an epeiric sea setting. The five lithofacies represent deposition in supralittoral, littoral, and low-energy sublittoral environmen~s. These environments were formed approximately parallel to the periphery of the basin. Of the three energy zones …
-
Paleoenvironmental Analysis Of The Upper Silurian Callocystitidae (Cystoidea, Rhombifera) In The Central Appalachians
… stratigraphic interval, representing all major epeiric sea environments from supratidal through shallow shelf below wave base. Identification of cystoid genera and species by disarticulated part studies (comparison of isolated plates to the corresponding element on whole thecae of known taxa) …
-
The Cambrian: Sedimentary controls on marine ichnology and stratigraphic time at outcrop
… Earth’s history, marked by the expansion of vast epeiric seas and major evolutionary innovations associated with the Cambrian Explosion. Evolutionary reconstructions can be influenced by sedimentary processes, which were heterogeneous across Cambrian seas and variably altered the record that is …
-
Storm-dominated shelf sedimentation marginal to a delta: an example from the Devonian of southwestern Virginia and eastern West Virginia
… accumulated in the proximal environments of an epeiric sea. Sandstones within the dominantly muddy formation are found in a variety of sequence types characterized by hummocky cross stratification. Individual beds usually have sharp erosive bases and gradational tops. A hydrodynamic …
-
Palynofacies and sedimentology of some Late Jurassic sediments from the British Isles and northern North Sea
… tool in the palaeoenvironmental modelling of epeiric sea facies. Particular emphasis is placed on the implications of oxygen deficiency in meromictic water bodies for the deposition of 'black shales'. In epeiric settings preservation is probably a more important determinant of black shale …
-
Paleoenvironmental Reconstruction of an Upper Ordovician Rocky Shoreline: The Lindsay Formation of Heywood and Partridge Islands, Ontario
… strata record two transgressive pulses of an epeiric sea that flooded the North American continent during the Late Ordovician. During this time, mountain building processes associated with the Taconic Orogeny were taking place to the present east, and the tectonic effects of this orogeny …
-
Depositional history and diagenesis of the upper Mission Canyon and lower Charles Formations (Mississippian), Billings County, North Dakota
… environments in a shallow, low-energy, epeiric-sea setting. The depositional history is characterized by 4 successive stages: 1) sublittoral deposition under shallow normal marine conditions; 2) sublittoral deposition in slight topographic depressions under restricted marine conditions …
-
Diagenesis and porosity development of the Mission Canyon and Charles Formations (Mississippian), Treetop and Whiskey Joe Fields, North Dakota
… and anhydrites which were deposited in a shallow epeiric sea. This study was limited to the upper Mission Canyon and lower Charles Formations of Treetop and Whiskey Joe fields, located along the Billings anticline in central Billings County, North Dakota. Close examination of ap~roximately 260 …
-
Depositional environments and diagenesis, Interlake Formation (Silurian), Williston Basin, North Dakota
… sublittoral, littoral, and supralittoral epeiric sea environments. In addition, paleosols are present, </p><p> Rocks that represent low-energy sublittoral environments contain abundant skeletal allochems, some in growth position, High-energy sublittoral environments are represented by …
-
Depositional environments and sandstone diagenesis in the Tyler Formation (Pennsylvanian), western North Dakota
… in this study, at the margin of a shallow epeiric sea.</p> <p>Initially, the presence of detrital clay and infiltration clay and early hematite and chlorite coatings on quartz grains was the most important factor influencing porosity reduction in Tyler sandstones. The first major diagenetic …
-
Sequence Stratigraphy of Middle-Mississippian Carbonates of the Southern Appalachians: Tuscumbia Limestone, Tuscumbia, AL
<p>This field-based research develops a sequence stratigraphic framework and detailed facies analysis which is used as a basis for understanding depositional histories of low-latitude, shallow-water, Mississippian carbonate deposits (Fort Payne Chert and Tuscumbia Limestone) in northwestern …
-
Sequence Development on a Sediment-Starved, Low Accommodation Epeiric Carbonate Ramp: Silurian Wabash Platform, USA Mid-continent During Icehouse to Greenhouse Transition
… stratigraphy of a sediment-starved low-latitude epeiric sea platform during the transition from Ordovician icehouse to Devonian greenhouse. The Wabash Platform (approximately 200,000 square km area) is bounded to the north by the Michigan Basin, to the east by the Appalachian Basin, and passed to …
-
Sedimentological study of the western zone of the Lady Annie phosphate deposit, Queensland, Australia
… depression marginal to the Georgina Basin epeiric sea. The analysis of grain type, textural fabrics and sedimentary structures of the phosphorites indicates that reworking, transport and winnowing played a major role in the formation of the deposit and in determining phosphate grade. Facies …
-
Sedimentological study of the western zone of the Lady Annie phosphate deposit, Queensland, Australia
… depression marginal to the Georgina Basin epeiric sea. The analysis of grain type, textural fabrics and sedimentary structures of the phosphorites indicates that reworking, transport and winnowing played a major role in the formation of the deposit and in determining phosphate grade. Facies …
-
Deposition, stratigraphy, provenance, and reservoir characterization of carbonate mudstones: the Three Forks Formation, Williston Basin
… directly from the fluvially-modified seawater indicated by radiogenically enriched [superscript 87]Sr/[superscript 86]Sr values. Dolomites predominantly formed as automicrites through freshwater mixing and meso- to hypersaline reflux based on elevated [superscript 87]Sr/[superscript …