Mineral Resources On-Line Spatial Data
Mineral Resources > Online Spatial Data > Geology > by state > Texas
|Name||Gober Chalk and Roxton Limestone|
|Geologic age||Phanerozoic | Mesozoic | Cretaceous-Late [Gulfian]|
|Original map label||Kgc|
|Comments||Chalk with local Roxton Limestone beds. Gober Chalk argillaceous, brittle, bluish gray; weathers white; thickness 400 +- ft, thins eastward. Roxton Ls sandy, glauconitic, soft, tough, red; marine megafossisl; thickness 10 ft, feathers out west in Fannin Co.|
|Primary rock type||limestone|
|Secondary rock type||limestone|
|Other rock types|
Sedimentary > Carbonate > Limestone > Chalk (Bed)Chalk.
Bureau of Economic Geology, 1992, Geologic Map of Texas: University of Texas at Austin, Virgil E. Barnes, project supervisor, Hartmann, B.M. and Scranton, D.F., cartography, scale 1:500,000
Bureau of Economic Geology, 1967, Sherman Sheet, Geologic Atlas of Texas: University of Texas at Austin, Bureau of Economic Geology, scale 1:250,000.
|Geographic coverage||Collin - Fannin - Grayson - Hunt - Lamar|
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