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Irma Formation

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Journal Article
Published: 01 May 2018
Journal of Paleontology (2018) 92 (3): 459-465.
...) Romualdo Formation, Araripe Basin, northeastern Brazil. The material is very well preserved, including the antennae, stalked eyes, second and third maxillipeds, pleopods, and uropods, and represents the first described fossil of the family Luciferidae. UUID: http://zoobank.org/fdf825b8-6fe9-42ae-8fc7...
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Journal Article
Journal: Clay Minerals
Published: 01 September 2015
Clay Minerals (2015) 50 (4): 485-496.
... of pH < 5, Pb 2+ ions exist mainly as hydrated Pb 2+ and hydrolysed Pb 2+ ions or both. At pH > 5 Pb 2+ may be present as PbOH + , Pb(OH) 2 , [Pb 2 (OH) 3 ] + , [Pb 3 (OH) 4 ] 2+ , [Pb 6 (OH) 8 ] 4+ , and [Pb(OH) 3 ] − . The formation of these hydroxide species results in a decrease...
Journal Article
Journal: AAPG Bulletin
Published: 01 July 1930
AAPG Bulletin (1930) 14 (7): 829-844.
... to be a repetition of the clays in the vicinity of Boggy. 1 C. H. Dane,“Oil-Bearing Formations of Southwestern Arkansas,” U. S. Geol. Survey Press Bulletin (September 10, 1926). 1 L. P. Teas,“Irma Oil Field, Nevada County, Arkansas,” Structure of Typical American Oil Fields, Vol. I (Amer...
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Journal Article
Journal: AAPG Bulletin
Published: 01 September 1956
AAPG Bulletin (1956) 40 (9): 2057-2080.
...H. R. Greiner ABSTRACT The oldest rock unit above the Precambrian basement in the Waterways area of northeastern Alberta has long been named the Methy formation. A type core section and detailed lithologic description of this dolomitized reef are given. Criteria found useful in identifying...
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Journal Article
Journal: AAPG Bulletin
Published: 01 June 1992
AAPG Bulletin (1992) 76 (6): 864-894.
...Eva P. Moldovanyi; Lynn M. Walter ABSTRACT We present results on regional geochemical analyses of formation waters from Jurassic carbonate strata of the upper Smackover Formation from the southwest Arkansas shelf (Gulf Coast basin). These formation waters have been noted in earlier studies...
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Journal Article
Published: 01 November 2016
Journal of Sedimentary Research (2016) 86 (11): 1328-1343.
..., the bulk chemical signature of travertines (Mg, Ca, and Sr wt%) are consistent with “prior calcite precipitation” (PCP) processes and thus likely records the environmental conditions at the time of their formation. However, for the third site, the trace-element concentrations in the various carbonate...
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Journal Article
Journal: Economic Geology
Published: 01 May 2010
Economic Geology (2010) 105 (3): 593-625.
... 1.85 to 1.58 Ga was the following: (1) enhanced oxidation of sulfides in the crust that provided sulfate to the hydrosphere and Pb and Zn to sediments; (2) development of major redox and compositional gradients in the oceans; (3) first formation of significant sulfate-bearing evaporites; (4) formation...
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Journal Article
Journal: AAPG Bulletin
Published: 01 June 1965
AAPG Bulletin (1965) 49 (6): 749-765.
... in Concordia, 1 in Franklin, 2 in LaSalle, and 1 in Tensas. Gas discoveries were made in Bienville, Caldwell, LaSalle, Natchitoches, Sabine, and Winn Parishes. Thirteen of the oil discoveries were in Wilcox Group reservoirs, 3 in the Sparta Formation, 2 in the Tuscaloosa, a and 1 each in the Buckrange...
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Journal Article
Journal: AAPG Bulletin
Published: 01 June 1966
AAPG Bulletin (1966) 50 (6): 1214-1227.
... in LaSalle, 1 in Caddo, 1 in Catahoula, and 1 in DeSoto. Gas discoveries were made in DeSoto and Sabine Parishes. Eleven of the oil discoveries were in the Wilcox Group reservoirs, and 1 each was in the Paluxy Sand and Pettet Formation. Two gas fields were discovered in reservoirs of the Tuscaloosa and Tokio...
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Journal Article
Published: 30 September 2018
Journal of Sedimentary Research (2018) 88 (9): 1132-1151.
... and present significant potential as paleoenvironmental proxies, if the mechanisms that control their formation and growth can be understood quantitatively. There are a number of hypotheses about the controls on ooid growth, each offering different ideas on where and how ooids accrete and what role, if any...
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Journal Article
Journal: SEG Newsletter
Published: 01 April 2019
SEG Newsletter (2019) (117)
... This file includes the entire issue in PDF format. The HTML versions of the peer-reviewed articles must be viewed and/or purchased separately. © 2019 The Society of Economic Geologists, Inc 2019 The Society of Economic Geologists, Inc Readers have free access to this material, but SEG holds...
Journal Article
Journal: Economic Geology
Published: 01 August 2006
Economic Geology (2006) 101 (5): 955-980.
... and are spatially associated with intermediate argillic alteration. Tabular subhorizontal replacement zones at Miller Creek and Daisy Pass are hosted by dolomitic limestone of the Cambrian Meagher Formation at the contact with the intrusive complex and are spatially associated with sills and dikes with argillic...
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Journal Article
Journal: AAPG Bulletin
Published: 01 March 1923
AAPG Bulletin (1923) 7 (2): 147-158.
... of the drilling until recently has been without geological guidance. TABLE OF FORMATIONS   Southern Alberta Central Alberta Tertiary Paskapoo (Porcupine Hills beds) Willow Creek beds   Cretaceous Edmonton (St. Mary River beds) Edmonton formation Bearpaw formation Bearpaw formation...
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Series: Geological Society, London, Engineering Geology Special Publications
Published: 01 January 2005
DOI: 10.5382/SP.11.13
EISBN: 9781629490359
... Some orebodies are tubular, subvertical pipes that are ovoid in horizontal section. Examples of these are the Rosa Norte, Irma, and Viviana bodies discovered because of their association with the Rosa vein. These bodies may have irregular forms but typically have a maximum horizontal width...
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Journal Article
Published: 01 February 2012
Quarterly Journal of Engineering Geology and Hydrogeology (2012) 45 (1): 7-18.
... evaporitic units and thick, incompetent, marly formations within the Upper Lias and Oxfordian. These provided horizons of easy slip and detachment (décollement planes) and so prompted the initiation of thrust-dominated tectonics. Deformation within the External Zones was typically accompanied by very low...
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Journal Article
Journal: AAPG Bulletin
Published: 01 March 1939
AAPG Bulletin (1939) 23 (3): 281-324.
... the Tertiary formations. Regionally, the extent of the North Louisiana Salt-Dome province coincides approximately with a major regional downwarp defined by structural contours on the base of the Glen Rose Anhydrite zone. The axis of this regional syncline trends approximately from south to north through...
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Journal Article
Journal: Geology
Published: 01 February 2002
Geology (2002) 30 (2): 147-150.
..., and biostratigraphic criteria, especially where formations are separated by fossiliferous mudstones of the Eau Claire Formation ( Fig. 1 ). However, in our study site exposures the Eau Claire is absent; therefore we can only assign the strata to the uppermost Mt. Simon Sandstone or basal Wonewoc Sandstone...
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Journal Article
Journal: AAPG Bulletin
Published: 01 January 1926
AAPG Bulletin (1926) 10 (1): 1-60.
... and Monroe uplifts in their present form. 3 Faulting, as revealed at Homer, Bull Bayou, Stephens, Irma, Smackover, and elsewhere accompanied this movement. Dome formation was probably initiated by deep seated faulting corresponding to the shearing visible in the Tahlequah (Ozark) uplift...
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Series: GSA Field Guides
Published: 21 March 2019
DOI: 10.1130/2019.0053(03)
EISBN: 9780813756530
... of these shells are added by dredging and beach renourishment projects, with their local abundance contributing to relatively steep beach profiles and formation of beach cusps ( Hayes and Michel, 2007 ). As a result, Edisto beaches are quite shelly, dominated by recent and older oysters ( Crassostrea virginica...
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Journal Article
Journal: AAPG Bulletin
Published: 01 April 1959
AAPG Bulletin (1959) 43 (4): 790-806.
..., biotite, minor chlorite. Grain size: medium. Fabric: granitoid. Inferred origin: intrusive plutonic. (111) Imperial’s Irma No. 1. Cuttings, 6,750 feet. Basement elevation, –4,433 feet. Biotite granite. S.G. n.d. Microline, oligoclase, quartz, biotite. Grain size: medium. Fabric: granitoid. Inferred...
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