Geologic units in Blanco county, Texas

Glen Rose Limestone (Early Cretaceous) at surface, covers 60 % of this area

Glen Rose Limestone

Hensell Sand (Early Cretaceous; Comanchean Series) at surface, covers 10 % of this area

Hensell Sand

Edwards Limestone (Early Cretaceous) at surface, covers 4 % of this area

Edwards Limestone

Riley Formation showing Lion Mountain Sandstone and Cap Mountain Limestone Members, undivided (Middle Cambrian) at surface, covers 4 % of this area

Riley Formation showing Lion Mountain Sandstone and Cap Mountain Limestone Members, undivided

Wilberns Formation showing San Saba Member (Late Cambrian) at surface, covers 3 % of this area

Wilberns Formation showing San Saba Member

Tanyard Formation (Early Ordovician) at surface, covers 3 % of this area

Tanyard Formation

Wilberns Formation showing Point Peak, Morgan Creek Limestone, and Welge Sandstone Members, undivided (Late Cambrian) at surface, covers 3 % of this area

Wilberns Formation showing Point Peak, Morgan Creek Limestone, and Welge Sandstone Members, undivided

Hickory Sandstone Member (Middle Cambrian) at surface, covers 2 % of this area

Hickory Sandstone Member

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

Gorman Formation

Town Mountain Granite (preCambrian (Proterozoic)) at surface, covers 2 % of this area

Town Mountain Granite

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

Honeycut Formation

Cow Creek Limestone, Hammett Shale, and Sycamore Sand, undivided (Early Cretaceous) at surface, covers 2 % of this area

Cow Creek Limestone, Hammett Shale, and Sycamore Sand, undivided

Alluvium (Holocene) at surface, covers 1 % of this area

Alluvium

Terrace deposits (Pleistocene and Holocene) at surface, covers 0.9 % of this area

Terrace deposits

Big Branch Gneiss (preCambrian (Proterozoic)) at surface, covers 0.5 % of this area

Big Branch Gneiss

Marble Falls Limestone (Pennsylvanian; Morrow Series) at surface, covers 0.4 % of this area

Marble Falls Limestone

Packsaddle Schist (preCambrian (Proterozoic); Llano Series) at surface, covers 0.4 % of this area

Packsaddle Schist

Coal Creek Serpentinite (preCambrian (Proterozoic)) at surface, covers 0.1 % of this area

Coal Creek Serpentinite

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

Sparta Sand

Red Mountain Gneiss (preCambrian (Proterozoic)) at surface, covers < 0.1 % of this area

Red Mountain Gneiss

Younger granitic intrusion (preCambrian (Proterozoic)) at surface, covers < 0.1 % of this area

Younger granitic intrusion