Geologic units in Lampasas county, Texas

Paluxy Sand and Glen Rose Limestone, undivided (Early Cretaceous) at surface, covers 50 % of this area

Paluxy Sand and Glen Rose Limestone, undivided

Walnut Clay (Early Cretaceous) at surface, covers 21 % of this area

Walnut Clay

Travis Peak Formation (Early Cretaceous) at surface, covers 9 % of this area

Travis Peak Formation

Undivided part Fredericksberg Group (Early Cretaceous) at surface, covers 5 % of this area

Undivided part Fredericksberg Group

Marble Falls Limestone (Pennsylvanian; Morrow Series) at surface, covers 3 % of this area

Marble Falls Limestone

Alluvium (Holocene) at surface, covers 3 % of this area

Alluvium

Strawn Group (Middle Pennsylvanian; Atoka and Des Moines Series) at surface, covers 3 % of this area

Strawn Group

Honeycut Formation (Early Ordovician) at surface, covers 2 % of this area

Honeycut Formation

Terrace deposits (Pleistocene and Holocene) at surface, covers 1 % of this area

Terrace deposits

Gorman Formation (Early Ordovician) at surface, covers 0.9 % of this area

Gorman Formation

Smithwick Formation (Middle Pennsylvanian; Atoka Series) at surface, covers 0.5 % of this area

Smithwick Formation

Quaternary deposit, undivided (Quaternary) at surface, covers 0.5 % of this area

Quaternary deposit, undivided

Undivided parts of Washita and Fredericksberg Groups (Early Cretaceous) at surface, covers 0.4 % of this area

Undivided parts of Washita and Fredericksberg Groups

Barnett Formation, Chappel Limestone, Houy, Zesch, Bear Spring, and Stribling Formations, and Pillar Bluff Limestone, undivided (Late; Middle; and Early Mississippian and Devonian) at surface, covers 0.4 % of this area

Barnett Formation, Chappel Limestone, Houy, Zesch, Bear Spring, and Stribling Formations, and Pillar Bluff Limestone, undivided

Tanyard Formation (Early Ordovician) at surface, covers 0.2 % of this area

Tanyard Formation

Glen Rose Limestone (Early Cretaceous) at surface, covers < 0.1 % of this area

Glen Rose Limestone