Geologic units in Bexar county, Texas

Additional scientific data in this geographic area

Wilcox Group, undivided (Paleocene to Eocene) at surface, covers 18 % of this area

Wilcox Group, undivided

Terrace deposits (Pleistocene and Holocene) at surface, covers 16 % of this area

Terrace deposits

Glen Rose Limestone (Early Cretaceous) at surface, covers 13 % of this area

Glen Rose Limestone

Edwards Limestone (Early Cretaceous) at surface, covers 10 % of this area

Edwards Limestone

Pecan Gap Chalk (Late Cretaceous; Gulfian Series) at surface, covers 8 % of this area

Pecan Gap Chalk

Leona Formation (Pleistocene) at surface, covers 8 % of this area

Leona Formation

Navarro Group and Marlbrook Marl, undivided (Late Cretaceous; Gulfian Series) at surface, covers 7 % of this area

Navarro Group and Marlbrook Marl, undivided

Austin Chalk (Late Cretaceous; Gulfian Series) at surface, covers 5 % of this area

Austin Chalk

Carizzo Sand (Eocene) at surface, covers 5 % of this area

Carizzo Sand

Midway Group, undivided (Paleocene) at surface, covers 3 % of this area

Midway Group, undivided

Uvalde Gravel (Pliocene to Pleistocene) at surface, covers 3 % of this area

Uvalde Gravel

Buda Limestone and Del Rio Clay, undivided (Late Cretaceous) at surface, covers 2 % of this area

Buda Limestone and Del Rio Clay, undivided; Eastern part of Trans-Pecos and High Plains and Western part of Trans-Pecos and North, central, and south Texas including Quaternary for all of west Texas.

Reklaw Formation (Eocene) at surface, covers 0.6 % of this area

Reklaw Formation

Anacacho Limestone (Late Cretaceous; Gulfian Series) at surface, covers 0.4 % of this area

Anacacho Limestone; North, central, and south Texas including Quaternary for all of west Texas.

Alluvium (Holocene) at surface, covers 0.2 % of this area

Alluvium

Queen City Sand (Eocene) at surface, covers < 0.1 % of this area

Queen City Sand

Escondido Formation (Late Cretaceous; Gulfian Series) at surface, covers < 0.1 % of this area

Escondido Formation