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Micromorphology investigation of sepiolite bearing petrocalcic horizons formed from lacustrine sediments on the southern high planes of Texas and New Mexico
micromorphology investigation petrocalcic horizons lacustrine sediments
2011/11/8
The presence of sepiolite in soils has long been thought to have been attributed to inheritance from alternative parent material via secondary (eolian, alluvial) depositional processes due to sepiolit...
Ctenacanthiform Cladodont Teeth from the Lower PermianWichita Group,Texas,U.S.A.
Ctenacanthiform shark teeth Lower Permian Artinskian Texas USA
2009/10/20
Isolated teeth of Glikmanius occidentalis occur in ten vertebrate faunas in theWaggoner Ranch Formation and in one fauna in the underlying Petrolia Formation. They range in size (anteromedial-posterol...
Authigenesis of Kaolinite and Chlorite in Texas Gulf Coast Sediments
Authigenesis Back-scattered electron imaging Chlorite Illite/smectite Iron Kaolinite
2012/1/11
Core cuttings from numerous wells traversing Oligocene through Recent sediments of the Texas Gulf Coast were examined with a scanning electron microscope using the back-scattered electron imaging mode...
Kaolinite, Opal-CT, and Clinoptilolite in Altered Tuffs Interbedded with Lignite in the Jackson Group, Texas
Clinoptilolite Kaolinite Lignite Marcasite Opal-CT Plant roots Pyrite Silication Zeolite
2012/1/11
The mineralogy of partially kaolinized strata interbedded with lignite at the San Miguel mine, Atascosa County, Texas, was investigated by X-ray powder diffraction and optical and scanning electron mi...
Mineralogy and Genetic Relationships of Tonstein, Bentonite, and Lignitic Strata in the Eocene Yegua Formation of East-Central Texas
Bentonite Clinoptilolite Kaolinite Lignite Smectite Tonstein Weathering
2012/2/6
A kaolinite-rich bed (tonstein) and an associated bentonite in the upper part of Yegua Formation at College Station, east-central Texas, were formed by in situ weathering processes in a late Eocene sw...
Mineralogical Transformations during Weathering of Lignite Overburden in East Texas
Lignite Oxidation Reclamation Smectite Soil Weathering
2011/11/25
Abstract: Mineralogical weathering sequences in sediments overlying lignite beds were investigated in a core (27 m deep) from Calvert, Robertson County, northeast Texas. Weathering trends were evaluat...