Geologic units in Fisher county, Texas

Whitehorse Group, undivided (Permian; Guadalupe Series) at surface, covers 35 % of this area

Whitehorse Group, undivided

Quaternary deposit, undivided (Quaternary) at surface, covers 27 % of this area

Quaternary deposit, undivided

Blaine Formation (Permian; Guadalupe Series) at surface, covers 12 % of this area

Blaine Formation

Alluvium (Holocene) at surface, covers 7 % of this area

Alluvium

Quartermaster Formation (Permian; Guadalupe Series) at surface, covers 6 % of this area

Quartermaster Formation; North and central Texas including panhandle.

Dockum Group, undivided (Late Triassic) at surface, covers 6 % of this area

Dockum Group

Sand sheet deposits (Holocene) at surface, covers 4 % of this area

Sand sheet deposits

Ogallala Formation (Pliocene to Miocene) at surface, covers 3 % of this area

Ogallala Formation

San Angelo Formation (Permian; Guadalupe Series) at surface, covers 0.5 % of this area

San Angelo Formation

Playa deposits (Pleistocene and Holocene) at surface, covers 0.2 % of this area

Playa deposits

Sand dune deposits (Holocene) at surface, covers < 0.1 % of this area

Sand dune deposits

Terrace deposits (Pleistocene and Holocene) at surface, covers < 0.1 % of this area

Terrace deposits

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

Seymour Formation

Lingos Formation (Middle (?) Pleistocene to Recent) at surface, covers < 0.1 % of this area

Lingos Formation