Austin Chalk
  Britton Fm.

Arcadia Park Formation
(c. 89-91 mya)

 The Arcadia Park Formation consists of blackish and bluish shales above the Kamp ranch limestone and below the Austin Chalk.

This formation is very fossiliferous in certain areas and often there is a fossil abundant lag zone at the top of the formation and below the Austin Chalk.   This zone greatly expands to the south where it is called the Atco Formation.

"The Eagle Ford [Group] / Austin contact represents the Turonian / Coniacian boundary (89 MA)" 


Arcadia Park geology:

Arcadia Park shale
 Kamp Ranch limestone at base
 Kamp Ranch limestone
Kamp Ranch limestone
 Kamp Ranch limestone
 Kamp Ranch limestone
Kamp Ranch limestone
    

Arcadia Park fossils:

Cephalopods: (ammonites, baculites) 
Placenticeras sp. ammonite ? 

Form: Arcadia Park
Period: Cretaceous  (c. 95 mya)
Loc: Dallas Co., TX		 Prionocyclus sp. ammonites
 
Form: Arcadia Park
Period: Cretaceous (c. 95 mya)
Loc: Grayson Co., TX  March 22, 2009.		 Metoicoceras sp. ammonites

Form: Arcadia Park
Period: Cretaceous  (c. 95 mya)
Loc: Dallas Co., TX  Feb. 24, 2007.
Cretoxyrhina  shark teeth

Form: Arcadia Park (redeposited)
Period: Cretaceous 
Loc: Tarrant Co., TX		 Cretoxyrhina shark teeth

Form:  Arcadia Park (redeposited)
Period: Cretaceous
Loc: Tarrant Co., TX		 Squalicorax shark teeth

Form:  Arcadia Park (redeposited)
Period: Cretaceous 
Loc: Tarrant Co., TX
Ptychodus shark teeth

Form:  Arcadia Park (redeposited)
Period: Cretaceous
Loc: Tarrant Co., TX		 Ptychodus shark teeth

Form:  Arcadia Park (redeposited)
Period: Cretaceous 
Loc: Tarrant Co., TX		 Shark teeth (various species) 

Form: Arcadia Park
Period: Cretaceous 
Loc:  Dallas, Tx.  May 2006.
Shark tooth

Form: Arcadia Park
Period: Cretaceous 
Loc: Tarrant Co., TX		 fish vertebra

Form: Arcadia Park
Period: Cretaceous (c. 95 mya)
Loc:  Tarrant Co., TX  2007.		  
Ichthyosaur or Pliosaur tooth

Form: Arcadia Park
Period: Cretaceous
Loc: Denton Co., TX  April 29, 2017		 Ptychodus sp. shark tooth  (not sure what species)

Form: Arcadia Park
Period: Cretaceous
Loc: Denton Co., TX  April 29, 2017		 Ptychodus anonymous shark tooth

Form: Arcadia Park
Period: Cretaceous
Loc: Denton Co., TX  April 29, 2017