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Geologic units in La Salle county, Texas

Laredo Formation (Middle Eocene) at surface, covers 33 % of this area

Laredo Formation

Yegua Formation (Middle Eocene) at surface, covers 33 % of this area

Yegua Formation

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

Terrace deposits

Alluvium (Holocene) at surface, covers 13 % of this area

Alluvium

Jackson Group, undivided (Oligocene and Eocene) at surface, covers 2 % of this area

Jackson Group, undivided

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

Quaternary deposit, undivided

Cook Mountain Formation (Eocene) at surface, covers 1 % of this area

Cook Mountain Formation

Uvalde Gravel (Pliocene to Pleistocene) at surface, covers 0.3 % of this area

Uvalde Gravel