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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.
.... ( 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 . Iowa Academy of Sciences , 70 , 261 – 272 . Johnston , C.T. , Sposito , G...
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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.
... Minerals , 22 , 385 – 390 . Güven , N. , Hower , W.F. , and Davies , D.K. ( 1980 ) Nature of authigenic illites in sandstone reservoirs . Journal of Sedimentary Petrology , 50 , 761 – 766 . Hayes , J.B. ( 1963 ) Kaolinite from Warsaw geodes, Keokuk region, Iowa . Iowa...
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Journal Article
Journal: Clay Minerals
Published: 01 September 2002
Clay Minerals (2002) 37 (3): 559-570.
... ) The infrared spectra of layer silicates . Spectrochimica Acta . 20 , 1149 – 1173 . Hayes 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...
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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.
.... ( 1998 ) Hydroxyl deformation in kaolins . Clays and Clay Minerals , 46 , 280 – 289 . 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...
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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.
... 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 kaolinites can be attributed to inferior ordering and crystallinity, plus some...
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Journal Article
Journal: PALAIOS
Published: 01 December 2002
PALAIOS (2002) 17 (6): 556-570.
... 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 are given in Snyder (1991) . 12 05 2002...
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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.
... the areal geology throughout this region. The belt of Mississippian outcrop in southwestern Indiana has been studied mainly in reconnaissance because of the lack of topographic maps, but the recent work of C. A. Malott and P. B. Stockdale has added much to the knowledge of this region. As detailed...
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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.
... ). For example, although Abatocrinus steropes is present throughout the region, A . clavigerus is only present in the western, shallow-water carbonates of the Keokuk Limestone; and A . grandis is only known from the eastern side of the Eastern Interior Seaway but is in both shallow- and deep-water...
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Journal Article
Journal: AAPG Bulletin
Published: 01 March 1977
AAPG Bulletin (1977) 61 (3): 309-330.
... ; Lee, 1940 ; 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...
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Journal Article
Journal: AAPG Bulletin
Published: 01 May 1950
AAPG Bulletin (1950) 34 (5): 882-922.
... region. Important help has also come from Professor James H. C. Martens of the department of geology, Rutgers University, and R. C. Tucker, assistant State geologist of West Virginia. Invaluable aid was given in the field, at different times, by J. L. Dally, J. K. Somerville, J. L. Wray, and T. E. Garnar...
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Journal Article
Journal: AAPG Bulletin
Published: 01 November 1962
AAPG Bulletin (1962) 46 (11): 2003-2018.
... 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 and Castle Reef. The name Hannan Limestone is hereby abandoned. Reference section .—In the Sun River Canyon area, rocks...
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Journal Article
Journal: AAPG Bulletin
Published: 01 April 1949
AAPG Bulletin (1949) 33 (4): 614-633.
... 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 and an upper sequence of black, green, and minor red...
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Journal Article
Journal: Palynology
Published: 01 January 2004
Palynology (2004) 28 (1): 159-174.
... they concluded that the Borden Delta rocks in Kentucky and Indiana were comparable to the previously established miospore zones of Western Europe ( Higgs et al., 1988 ; Higgs, 1996 ; Coleman and Clayton, 1987 ; Coleman, 1991 ). The region under investigation (Kentucky and Indiana) was divided into three...
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