GEOLOGIC TIME CHART OF DALLAS AND TARRANT COUNTIES,

TEXAS


    Age      
 

 

or

 

MA

 

Period

Series

 European Stage

Group

(million years ago)  Formations
Quaternary

 

Holocene

 

0.01 Quaternary Terrace Deposits and Quaternary

Alluvium

 

Pleistocene

 

1.8 Unconformity (exent uknown)
Unconformity
Cretaceous

Upper Cretaceous / Gulfian

 

 

 

Ozan Marl (Lower Tayler)
Unconformity
 

Austin

 

     Gober

Chalk

Santonian 82     

Brownstown Marl

 

 

    

Blossom Sand

Coniacian

 

     Austin

Chalk

 

 

Unconformity
Turonian

Eagle Ford

86 Arcadia Park Shale
 

 

Kamp Rach Limestone
Cenomanian 92 Britton Shale
 

 

Tarrant Beds or Six Flags

Limestone

 

Woodbine

 

    

Arlington Member

 

 

    

Lewisville Member

 

 

     Dexter

Member

 

 

     Rush

Creek Member

Lower Cretaceous / Comanchian

 

Unconformity
 

Washita

 

Grayson Marl
 

 

Main Street Limestone
Albian 100 Pawpaw
 

 

Weno Limestone
 

 

Denton Clay
 

 

Fort Worth Limestone
 

 

Duck Creek Limestone
 

 

Unconformity
 

Fredricksburg

 

Kiamichi
 

 

Goodland Limestone
 

 

Walnut Clay
 

 

Unconformity
 

 

Paluxy
 

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Copyright  1996-2019, Dallas Paleontological Society. All Rights Reserved..
The Dallas Paleontological Society is a 501(c)(3) non-profit organization.

Website issues contact the  DPS Webmaster

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