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Geologic units in Guadalupe county, Texas

Wilcox Group, undivided (Phanerozoic | Cenozoic | Tertiary | Paleocene Eocene) at surface, covers 41 % of this area

Wilcox Group, undivided

Leona Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers 23 % of this area

Leona Formation

Lithology: sand; gravel; clay or mud

Carizzo Sand (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 13 % of this area

Carizzo Sand

Lithology: sandstone

Navarro Group and Marlbrook Marl, undivided (Phanerozoic | Mesozoic | Cretaceous-Late [Gulfian]) at surface, covers 8 % of this area

Navarro Group and Marlbrook Marl, undivided

alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 5 % of this area

alluvium

Lithology: sand; silt; clay or mud; gravel

Midway Group, undivided (Phanerozoic | Cenozoic | Tertiary | Paleocene) at surface, covers 4 % of this area

Midway Group, undivided

Willis Formation (Phanerozoic | Cenozoic | Tertiary | Pliocene) at surface, covers 3 % of this area

Willis Formation

Lithology: clay or mud; silt; sand; gravel

Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 2 % of this area

Terrace deposits

Pecan Gap Chalk (Phanerozoic | Mesozoic | Cretaceous-Late [Gulfian]) at surface, covers 0.5 % of this area

Pecan Gap Chalk

Reklaw Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 0.4 % of this area

Reklaw Formation

Lithology: sandstone; clay or mud

Queen City Sand (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 0.4 % of this area

Queen City Sand

Edwards Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 0.2 % of this area

Edwards Limestone