Knowles limestone
WebConsists of thin regionally persistent dark-gray argillaceous limestone interbedded with dark-gray shale. Base placed at base of 100-ft thick limestone--called informally the B … Webwww.gcags.org
Knowles limestone
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WebThe Knowles Limestone is a shallow shelf to ramp complex forming an arcuate lenticular lithosome from East Texas across northwestern Louisiana (Coleman and Coleman, 1981; Cregg and Ahr, 1984; Finneran et al., 1984). It is up to 330 m (1080 ft) thick and thins both landward and basinward. WebNov 18, 2024 · Consists dominantly of marine beds, made up of various types of shale, sand, and limestone. Thickness is about 3240 feet. Overlies the Buckner formation and underlies the Travis formation. Unit includes the Schuler facies. The Cotton Valley is of Late Jurassic age. Source: GNU records (USGS DDS-6; Reston GNULEX).
WebUsage: Knowles Limestone of Cotton Valley Group (AR?,LA,TX?) Geologic age: Jurassic, Late Type section, locality, area and/or origin of name: Type section (subsurface): depth … WebLower Cretaceous units to be assessed in the present study include the Knowles Limestone, Sligo Formation, Trinity Group, Fredericksburg Group, and lower part of the Washita Group. Upper Cretaceous rocks being assessed include the Buda Limestone of the Washita Group, Eagle Ford Group (Eagle Ford shale, and the updip Tuscaloosa and Woodbine ...
WebThe Knowles Limestone is an upper unit of the Cotton Valley Group, and in Milam County, Texas, it is approximately 350 ft (100 m) thick, consisting of shales, terrigenous dolomitic … WebJan 1, 2024 · Major reef-building organisms are Lithocodium, stromatoporoids, and corals. The Winn limestone is younger than the Calvin limestone, and at the shelf margin, it may have been 600 to 800 ft (180 to 245 m) thick. It is composed of organisms similar to those of the Calvin reef complex.
WebThe lithology comprises the Tertiary-, Cretaceous-, and Jurassic-aged stratigraphic units characterized primarily by claystones (shales) and sandstones. There are also limestone formations, such as the Knowles limestone in the Cotton Valley Group and the Smackover limestone at bottom of the Haynesville shale ( Fig. 7.30 ).
WebThe Knowles Limestone (new) at the top is a tabular unit of limestone and shale. Forty miles south of the Arkansas-Louisiana boundary the massive, white Terryville Sandstone (new) … tabs on chromeWebKnowles Limestone, reflect an infilling of the basement low areas and a general progradation of the ramp margin (Dobson, 1990). This progradation has been interpreted by Dobson (1990) to produce a change from a carbonate ramp to a rimmed platform margin. The hiatus between the Cotton Valley Group- tabs on carhttp://quarriesandbeyond.org/name_and_origion/k.html tabs on bottom of excel are missing