1. Mineral Resources
  2. Online Spatial Data
  3. Geology
  4. by state
  5. Texas geologic units

Geologic units in Washington county, Texas

Oakville Sandstone (Miocene) at surface, covers 34 % of this area

Oakville Sandstone

Fleming Formation (Miocene) at surface, covers 33 % of this area

Fleming Formation

Catahoula Formation (Oligocene) at surface, covers 11 % of this area

Catahoula Formation

Alluvium (Holocene) at surface, covers 9 % of this area

Alluvium

Manning Formation (Eocene) at surface, covers 5 % of this area

Manning Formation

Whitsett Formation (Oligocene and Eocene) at surface, covers 3 % of this area

Whitsett Formation

Terrace deposits (Pleistocene and Holocene) at surface, covers 2 % of this area

Terrace deposits

High gravel deposits (Pleistocene) at surface, covers 1 % of this area

High gravel deposits

Willis Formation (Pliocene) at surface, covers 1 % of this area

Willis Formation

Lissie Formation (Quaternary; Middle Pleistocene) at surface, covers < 0.1 % of this area

Lissie Formation