Geology of Tarrant County, Texas

The source geological map used is "Geologic Atlas of Texas, Dallas Sheet" - Bureau of Economic Geology, 1987.  The map was digitally distorted in some spots to align the roads with the more accurate modern map BUT there is still some distortions and alignment is not perfect.  Colors used here are arbitrary.

 Tarrant County, Texas geological map in PDF form (5.4 meg) - Right Click and "Save Target As"

 Tarrant County, Texas geological map in JPG form
(8.3 meg) - Right Click and "Save Target As"

[The best way to print the maps below is to save each large image to your computer and then open with the default picture viewer.  This should allow you to print each image and fill a standard 8x11 page without any clipping as may occur if printing from your browser.] 

Tarrant County, Texas Geology in 12 parts:

Geological Groups and Formations:


Group and Formations:


Holocene Period: Qal - Quaternary alluvium Major: sand
Minor: clay, gravel
Pleistocene Period: Qt - Quaternary terrace  Major: sand
Minor: clay, gravel
Cretaceous Period: Kef - Eagle Ford Group
         Arcadia Park Formation
         Britton Formation
         Tarrant Formation

         (undivided on map)
Major: shale, siltstone
Incidental: limestone
Kwb - Woodbine Group
          Lewisville Member
          Dexter Member    

          (undivided on map)
Major: sandstone
Minor: mudstone
Kgm - Grayson Marl
          Mainstreet Limestone

          (undivided on map)
Major: marlstone, limestone
Kpd - Denton Clay
         Weno Limestone
         Pawpaw Formation

         (undivided on map)
Kwl - Weno  Major: claystone
Minor: limestone, marlstone
Kfd - Fort Worth Limestone
        Duck Creek Formation

        (undivided on map)
Kdc - Duck Creek Major: limestone
Minor: marl, clay 
Kki - Kiamichi Formation Major: clay
Minor: limestone, sandstone
Kgl - Goodland Limestone Major: limestone
Minor: claystone
Kwa - Walnut Clay Major: limestone, shale
Kpa - Paluxy Formation Major: sandstone
Minor: limestone

Stratigraphy of Denton County, Texas