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Geologic units in Dimmit county, Texas

El Pico Clay (Eocene) at surface, covers 33 % of this area

El Pico Clay

Bigford Formation (Eocene) at surface, covers 19 % of this area

Bigford Formation

Laredo Formation (Middle Eocene) at surface, covers 13 % of this area

Laredo Formation

Carizzo Sand (Eocene) at surface, covers 11 % of this area

Carizzo Sand

Alluvium (Holocene) at surface, covers 10 % of this area

Alluvium

Indio Formation (Paleocene to Eocene) at surface, covers 8 % of this area

Indio Formation

Terrace deposits (Pleistocene and Holocene) at surface, covers 3 % of this area

Terrace deposits

Quaternary deposit, undivided (Quaternary) at surface, covers 1 % of this area

Quaternary deposit, undivided

Kincaid Formation (Paleocene) at surface, covers 0.9 % of this area

Kincaid Formation

Uvalde Gravel (Pliocene to Pleistocene) at surface, covers 0.7 % of this area

Uvalde Gravel