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Leona Formation

Leona Formation
State Texas
Name Leona Formation
Geologic age Phanerozoic | Cenozoic | Quaternary | Pleistocene
Comments Fluvatile terrace deposits of gravel, sand, silt, and clay on first wide terrrace of Nueces and Leona Rivers below the level of Uvalde Formation. Leona may correlate with Onion Creek Marl of Austin Sheet.
Primary rock type sand
Secondary rock type gravel
Other rock types clay or mud
Lithologic constituents
Major
Unconsolidated > Coarse-detrital (Fluvial)
Unconsolidated > Fine-detrital (Fluvial)
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, 1974, San Antonio Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000.
Bureau of Economic Geology, 1974, Seguin Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000.
Counties Bexar - Caldwell - Comal - Culberson - Frio - Guadalupe - Hays - Karnes - Kinney - Maverick - Medina - Reeves - Uvalde - Wilson - Winkler - Zavala