Leona Formation (TXQle;0)

State	Texas
Name	Leona Formation
Geologic age	Phanerozoic \| Cenozoic \| Quaternary \| Pleistocene
Original map label	Qle
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 > Fine-detrital (Fluvial) Unconsolidated > Coarse-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.
Geographic coverage	Bexar - Caldwell - Comal - Culberson - Frio - Guadalupe - Hays - Karnes - Kinney - Maverick - Medina - Reeves - Uvalde - Wilson - Winkler - Zavala