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Showing 1 to 20 of 44 for “"Midcontinent"”.
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Late Paleozoic Bisaccate Pollen From the Midcontinent Area
Made available in DSpace on 2014-12-04T19:13:56Z (GMT). No. of bitstreams: 1 6003992.pdf: 4204603 bytes, checksum: 03bcd6eaeff51172904bed9ded345bbb (MD5) Previous issue date: 1960
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Facies and provenance analysis of the Midcontinent Rift System (MRS) in Kansas
The Midcontinent Rift System (MRS) formed a half-graben that extends into NE Kansas. The Precambrian rift succession, penetrated by Texaco Noel Poersch#1 (NP#1) well in Washington Co. at depths between 2846 and 11300 ft, comprises two successions. The lower one (11300-7429 ft) is dominated by …
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Geochemical Analysis of Mississippian Cherts and Devonian-Mississippian Novaculites, Southern Midcontinent Region
… Arkansas Novaculite in the southern midcontinent. Mississippi Valley-type Pb-Zn ore deposits in the Tri-State District and the Northern Arkansas District were deposited by hydrothermal fluids, and highly radiogenic Pb isotope ratios suggest a genetic relationship between the Boone …
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Conflict and Culture Change in the Late Prehistoric and Early Historic American Midcontinent
Beginning in the early 1600s, populations were destabilized by the indirect effects of European contact. With new incentives and new weapons (i.e., firearms), old enemies took advantage of weaknesses brought on by disease and famine to wage wars of annihilation. Algonquian and Iroquoian tribes …
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Sm-Nd and C-isotope chemostratigraphy of Ordovician epeiric sea carbonates, midcontinent of North America
… eNd, d13C and Sm/Nd profiles of Ordovician Midcontinent carbonates of North America demonstrate that fluctuations in sea level and depth are driving local changes in the eNd, d13C and Sm/Nd composition of epeiric seawater. Dissolved Nd derived from the Transcontinental Arch, Taconic …
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Potassic alteration of Cambrian-Ordovician sandstones and Precambrian basement rocks of the North American midcontinent
… in UPH-3 occurs on a regional scale in the Upper Midcontinent area. Here, two widespread zones of K-feldspar and sericite occur. A K/Ar date of 276 $\pm$ 10 Ma (Permian) was obtained on sericite from one locality in Iowa, which is separated by 300 km from Hole UPH-3. The episodic K diagenesis of …
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Seismic studies in the midcontinent of U.S. and its implications for the intraplate deformation process
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2025-12-01
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Regional Paleo-Environmental Study of Some Middle Pennsylvanian Strata Ofthe Midcontinent Region and Textural Analysis of Included Limestones
Made available in DSpace on 2014-12-09T20:34:14Z (GMT). No. of bitstreams: 1 6503651.pdf: 9676239 bytes, checksum: 6775ccf2f0c34983eeca12459e00c0f2 (MD5) Previous issue date: 1964
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Regional-Scale Impacts of Fluid Composition and Geologic Structure for Injection-Induced Seismicity in the Southern U.S. Midcontinent
Over the last decade, an increase in earthquake occurrence in Oklahoma and Kansas has been linked to oilfield wastewater injection disposal, particularly into the regionally underpressured Arbuckle Group. The Arbuckle is hydraulically connected to Precambrian basement through an extensive fracture …
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The Midcontinent exposed: Precambrian basement topography, and fault-and-fold zones, within the cratonic platform of the United States
"The Midcontinent region of the United States is part of the cratonic platform of the North American craton. This region is underlain by Precambrian basement formed dominantly during Proterozoic accretionary orogenies. It was modified by Proterozoic anorogenic felsic magmatism and was cracked by …
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Anatomically preserved marattiales from coal swamps of the Desmoinesian and Missourian of the midcontinent United States: Systematics, ecology and evolution
Eleven species-level assemblages of stems, frond members and fertile foliage of anatomically preserved Marattiales are proposed, based on specimens in coal balls from 16 coals in the Desmoinesian and Missourian (Westphalian D and Stephanian) of the Illinois, Forest City and Arkoma Basins. Four new …
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Insight from thermochronology, magnetotellurics, and structural analysis into the tectonic evolution of the Ozark Dome-Illinois Basin region, Midcontinent USA
The north-central Midcontinent of the United States lies within the cratonic platform of North America, a geological province characterized by a thin veneer of Phanerozoic sedimentary cover strata overlaying Precambrian basement. (The boundary between the cover and the basement is the Great …
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An Integrated Well Log and 3D Seismic Interpretation of Missourian Clinoforms, Osage County, Oklahoma
… with wireline well logs. The Late Pennsylvanian Midcontinent Sea was thought to be approximately 150 feet average depth across the southern Midcontinent during the Missourian Stage, and deepen towards the Arkoma and Anadarko Basins to the south. Here we show that the Late Pennsylvanian …
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U-Pb geochronology of the Duluth Complex and related hypabyssal intrusions: investigating the emplacement history of a large multiphase intrusive complex related to the 1.1 Ga Midcontinent Rift.
… related intrusions associated with the 1.1 Ga Midcontinent Rift in NE Minnesota. They did not, however, resolve differences in emplacement ages within and between major intrusive units due to a small number of dated samples. New high-precision U-Pb baddeleyite and zircon ages from five mafic …
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Crustal modification by tectonic events and upper mantle anisotropy beneath the Midcontinent Rift and New Madrid Seismic Zone: insights from receiver function studies and teleseismic shear wave splitting
… the New Madrid Seismic Zone (NMSZ) and the Midcontinent Rift (MCR). Shear wave splitting analysis in the MCR reveals the presence of fossilised anisotropy along the rift axis...In the NMSZ, anticipated rift-parallel fast directions associated with vertical magmatic dikes or along-rift flow, …
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Conodont Biostratigraphy of the Middle and Upper Ordovician Viola Group of the South-Central Oklahoma Arbuckle Anticline
… to middle Maysvillian in age. North American Midcontinent Province conodont faunas are found at the top and bottom of the studied section while North Atlantic Province conodonts dominate the remainder of the section.
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Analysis of Tripolitic Chert in the Boone Formation (Lower Mississippian, Osagean), Northwest Arkansas and Southwestern Missouri
… chert in analogous carbonate reservoirs in the midcontinent.</p>
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Petrology and Weathering Environment of Sub-unconformity Limestone unit: The Kessler Limestone member of the Bloyd Formation, Morrowan (Pennsylvanian) Northwest Arkansas
… Trace Creek is a regional unconformity in the midcontinent, marked by a manganese-enriched crust filled with various nodules and concretions. Methods used in this study began with reviews of previous investigations of the Kessler Limestone and followed with a petrographic analysis of the …
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Spatiotemporal Modeling for Wildlife Demographic Analysis: Bridging Analysis to Waterfowl Conservation
… system and highlight conservation issues for midcontinent mallard populations. My second chapter serves as a guide to using spatially explicit models in population ecology. In a comprehensive literature review, I discuss spatial autocorrelation in demographic models and show how spatial models …
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