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Annona Chalk

Annona Chalk
State Texas
Name Annona Chalk
Geologic age Phanerozoic | Mesozoic | Cretaceous-Late [Gulfian]
Comments Chalk, in part argillaceous and sandy, thickly bedded to massive, hard bluish white; weathers white; scattered marine megafossils; thickness 450 +_ ft, thins eastward.
Primary rock type limestone
Secondary rock type
Other rock types
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone > Chalk (Bed)
Map references
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
Unit references
Bureau of Economic Geology, 1966, Texarkana Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000.
Counties Red River