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Keokuk geode region

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Journal Article
Published: 01 January 1918
American Mineralogist (1918) 3 (1): 3–5.
Journal Article
Published: 01 March 1964
Journal of Sedimentary Research (1964) 34 (1): 123–133.
...John B. Hayes Abstract Geodes are abundant in the lower member of the Warsaw Formation in its type area. Early diagenetic calcite concretions were transformed into geodes as follows: A shell of chalcedony replaced calcite at the rim of the concretion; chalcedony spherulites and quartz euhedra...
Journal Article
Published: 01 February 2002
Clays and Clay Minerals (2002) 50 (1): 56–62.
... , 43 , 191 – 195 . Frost , R.L. , Fredericks , P.M. and Shurvell , H.F. ( 1996 ) Raman microscopy of some kaolinite clay minerals . Canadian Journal of Applied Spectroscopy , 41 , 10 – 14 . Hayes , J.B. ( 1963 ) Kaolinite from Warsaw geodes, Keokuk region, Iowa...
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Journal Article
Journal: AAPG Bulletin
Published: 01 November 1950
AAPG Bulletin (1950) 34 (11): 2133–2175.
... and they are correlated with equivalent zones in northeastern Missouri. The Burlington formation thins southwestward from Springfield and disappears from the section between Mt. Vernon, Lawrence County, and the Tri-State mining district. The Keokuk formation is present only in the western part of the area...
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Journal Article
Published: 01 August 2005
American Mineralogist (2005) 90 (8-9): 1462–1465.
... in sandstone reservoirs . Journal of Sedimentary Petrology , 50 , 761 – 766 . Hayes , J.B. ( 1963 ) Kaolinite from Warsaw geodes, Keokuk region, Iowa . Iowa Academy of Science , 70 , 261 – 272 . Kogure , T. ( 2002 ) Identification of polytypic groups in hydrous phyllosilicates using...
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Journal Article
Journal: Clay Minerals
Published: 01 September 2002
Clay Minerals (2002) 37 (3): 559–570.
... J.B. ( 1963 ) Kaolinite from Warsaw geodes, Keokuk region, Iowa . Iowa Academy of Science , 70 , 261 – 272 . Keller W.D. ( 1976 ) Scan electron micrographs of kaolins collected from diverse environments of origin. −1 . Clays and Clay Minerals , 24 , 107 – 113 . Keller...
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Journal Article
Published: 01 August 2008
Clays and Clay Minerals (2008) 56 (4): 470–485.
... ) and the very pure, well ordered Keokuk kaolinite occurs as large kaolinite crystals found in geodes ( Keller and Haenni, 1978 ). Table 1. Description of samples studied, location of the sample. The designation P or S is the approximate designation as primary or secondary origin, respectively...
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Journal Article
Published: 01 April 2015
Clays and Clay Minerals (2015) 63 (2): 73–84.
... . Hayes J.B. ( 1936 ) Kaolinite from Warsaw geodes, Keokuk Region, Iowa . Iowa Academy of Sciences Proceedings , 70 , 261 – 272 . Johnston C. Kogel J. Bish D. Kogure T. Murray H. ( 2008 ) Low-temperature FTIR study of kaolin-group minerals . Clays and Clay Minerals...
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Journal Article
Published: 01 April 2014
American Mineralogist (2014) 99 (4): 681–695.
...) The Keokuk kaolinite (here labeled as Keokuk) is a very high crystallinity specimen from geodes originated in Keokuk, Iowa, U.S.A. The processes that produced the Keokuk geodes are described by Hayes (1936) as far as they are understood. The accepted interpretation is that kaolinite precipitated in voids...
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Journal Article
Published: 01 December 2003
Clays and Clay Minerals (2003) 51 (6): 675–688.
... and Vaughan (1957) showed that kaolinite endothermic peaks typically have maximum values near 550–600°C. Keller et al . (1966 ) reported that the well crystallized Keokuk geode kaolinite gives a broad endothermic peak near 600°C and they considered that the lower dehydroxylation temperatures of typical...
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Journal Article
Journal: PALAIOS
Published: 01 December 2002
PALAIOS (2002) 17 (6): 556–570.
... locality to the north and Dennis Hollow locality to the south. The Iowa localities, the Foote Mineral Co. and Keokuk, are in Lee County, located to the northwest of the Illinois Geode Glen and Hamilton-Warsaw Roadcut localities. Detailed stratigraphic and collection information for all of these localities...
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Journal Article
Published: 01 September 2002
Journal of Sedimentary Research (2002) 72 (5): 657–672.
...Amy B. Khetani; J. Fred Read Abstract The discovery of the supergiant oil fields of the Caspian region has focused attention on eustatic, tectonic, and climatic controls on Lower Carboniferous facies. This paper documents the development of a highly complex, mixed carbonate-siliciclastic ramp...
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Journal Article
Journal: AAPG Bulletin
Published: 01 May 1940
AAPG Bulletin (1940) 24 (5): 765–858.
..., crystalline limestone beds are fewer, dense gray strata are more common, and fossils are much less abundant. In this region no distinct lithologic change occurs between the Burlington and Keokuk formations and they can be distinguished only by their fossils. The Burlington limestone lies conformably...
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Journal Article
Published: 01 November 2014
Journal of Paleontology (2014) 88 (6): 1154–1162.
... in which they lived) ( Kidwell et al., 1986 ). Here we examine this question with more than 5,200 crinoid calyxes and blastoid thecae identified from distinct sedimentary facies in the Lower Mississippian Fort Payne Formation (late Osagean, early Viséan) from the Lake Cumberland region in south-central...
FIGURES
Journal Article
Published: 22 April 2018
Journal of Paleontology (2018) 92 (4): 681–712.
... County, Tennessee (presumably the Fort Payne Formation). This species is now recognized from early Viséan formations: (1) Keokuk Formation at Hamilton, Hancock County, Illinois; and (2) the Fort Payne Formation in the Lake Cumberland Region in Kentucky (Clinton and Russell Counties) and in Tennessee...
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Journal Article
Journal: AAPG Bulletin
Published: 01 March 1977
AAPG Bulletin (1977) 61 (3): 309–330.
... ; Clair, 1948 ; Maher and Collins, 1949 ) or described the producing interval in particular oil and gas fields (Kansas Geol. Soc., 1959, 1965). Some studies have shown the usefulness of acid-insoluble residues and microfossils in regional correlation of Mississippian units ( Hiestand, 1938 ; Thompson...
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Journal Article
Journal: AAPG Bulletin
Published: 01 May 1950
AAPG Bulletin (1950) 34 (5): 882–922.
.... A species of Hemitrypa , probably H. proutana Ulrich, with reticulated superstructure was noted by Butts as present there and not observed in the Keokuk or Warsaw beds of the region but in the upper St. Louis beds along the Ohio River in southeastern Illinois. This same species was found, by the writer...
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Journal Article
Journal: AAPG Bulletin
Published: 01 November 1962
AAPG Bulletin (1962) 46 (11): 2003–2018.
.... A separate stratigraphic nomenclature for the Madison Group of the Sawtooth Range best expresses our present knowledge of regional stratigraphic relationships. In the southern part of the Sawtooth Range the Madison Group is divided into two formations, which are, in ascending order, the Allan Mountain...
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Journal Article
Journal: AAPG Bulletin
Published: 01 April 1949
AAPG Bulletin (1949) 33 (4): 614–633.
... of the formation, he considers to also have a Kinderhook aspect, but to include Burlington and Keokuk forms as well. Rundle formation .—The Rundle formation ( Kindle, 1924 ) is readily divisible, for mapping purposes, into two major divisions: a thick lower succession of massive cliff-forming limestones...
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Journal Article
Journal: Palynology
Published: 01 January 2004
Palynology (2004) 28 (1): 159–174.
... biostratigraphy of six boreholes from the West Flanders Region of Belgium, where it was proposed that the PC Biozone does not extend upward into the Upper Tournaisian (Tn3). However, the sections studied in this report indicate that the upper part of the PC Biozone is equivalent to part of the Tn3. We propose...
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