Late Atokan siliciclastic cave-fill deposits within preAbsarokan paleokarst in the Burlington-Keokuk limestone, Dade county, Missouri

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dc.contributor.advisor Mazzullo, S. J.
dc.contributor.author Turner, Robert W.
dc.date.accessioned 2012-06-21T16:10:49Z
dc.date.available 2012-06-21T16:10:49Z
dc.date.copyright 2011 en
dc.date.issued 2011-12
dc.identifier.other t11124
dc.identifier.uri http://hdl.handle.net/10057/5213
dc.description Thesis (M.S.)--Wichita State University, College of Liberal Arts and Sciences, Dept. of Geology . en_US
dc.description.abstract Two siliciclastic-filled paleocaverns within the Mississippian (Osagean) Burlington- Keokuk Limestone, which were formed in pre-Desmoinesian (Middle Pennsylvanian) time, are described from exposures in Dade County, Missouri. Petrographic and sedimentological analyses suggest that these cave-fills were derived from terrestrial sources. The age of the cave-fills were determined to be Late Atokan (Lower Pennsylvanian) based on their spore and pollen assemblage. One of the caves examined is filled primarily with coarse to fine-grained sand. Sedimentary structures include plane-beds, cross-stratification, scours, flaser bedding, softsediment deformed layers, flame structures, and normal-graded bedding. Cave-roof collapse and associated boudinage, as well as slack water shales, separate thick sandstone layers. This paleocavern has been interpreted to have been filled by fluviokarst processes with sediment entering primarily through sinking streams. The cave-fill in the other paleocave examined is primarily mudrock, shale, and sandy siltstone with some roof-collapse breccia. These rocks contain abundant organic matter, including wood fragments and charcoal, as well as abundant pyrite and secondary sulfate minerals. This paleocave has been interpreted to have been filled by soil and residuum entering through sinkhole collapses beneath marshes or swamps and by some in-flowing, low-energy water currents. The recharge points of a cave can be inferred by the type of sediments that it is filled with and recharge points dictate cave geometry. These recharge points can be seen on subsurface maps and an area of possible paleocaves can be drawn between these points. Sandstone cave-fill and fractured limestone host-rock around shale-filled caves are potential hydrocarbon reservoirs in the subsurface of Kansas and northern Oklahoma. en_US
dc.format.extent viii, 77 p. en
dc.language.iso en_US en_US
dc.publisher Wichita State University en_US
dc.rights Copyright Robert W. Turner, 2011. All rights reserved en
dc.subject.lcsh Electronic dissertations en
dc.title Late Atokan siliciclastic cave-fill deposits within preAbsarokan paleokarst in the Burlington-Keokuk limestone, Dade county, Missouri en_US
dc.type Thesis en_US

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  • Master's Theses [980]
    This collection includes Master's theses completed at the Wichita State University Graduate School (Fall 2005 --)
  • GEO Theses [10]
  • LAS Theses and Dissertations [441]
    Theses and dissertations completed at the College of Liberal Arts and Sciences (Fall 2005 -)

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