Geological strata known to contain the fossils of the extinct group of reptiles known as phytosaurs occur predominantly in the United States and Europe.
List of formations Group or Formation Period Country Argilliti di Riva di Solto Formation Triassic Baldy Hill Formation Triassic Cenger Formation Triassic Chatham Group/Bull Run Formation Triassic Chatham Group/New Haven Formation Triassic Chinle Formation Triassic Chinle Group/Bluewater Creek Formation Triassic Chinle Group/Dockum Formation Triassic Chinle Group/Garita Creek Formation Triassic Chinle Group/Petrified Forest Formation Triassic Chinle Group/Redonda Formation Triassic Chinle Group/San Pedro Arroyo Formation Triassic Chinle Group/Santa Rosa Formation Triassic Chinle Group/Sloan Canyon Formation Triassic Chinle Group/Tecovas Formation Triassic Chinle Group/Trujillo Formation Triassic Chugwater Group/Popo Agie Formation Triassic Dockum Formation Triassic Dockum Group/Bull Canyon Formation Triassic Dockum Group/Camp Springs Formation Triassic Dockum Group/Colorado City Formation Triassic Dockum Group/Cooper Canyon Formation Triassic Dockum Group/Santa Rosa Formation Triassic Dockum Group/Tecovas Formation Triassic Dockum Group/Trujillo Formation Triassic Doswell Group/Falling Creek Formation Triassic Drawno Beds Formation Triassic Fleming Fjord Formation Triassic Fundy Group/Blomidon Formation Triassic Garita Creek Formation Triassic Gartra Formation Triassic Gondwana Group/Lower Maleri Formation Triassic Gondwana Group/Tiki Formation Triassic Gres à Avicula contorta Formation Triassic Huai Hin Lat Formation Triassic Isalo Group/Isalo II or Makay Formation Triassic Isalo Group/upper Isalo II Formation Triassic Kuchinari Group/Huai Hin Lat Formation Triassic Lias Group/Blue Lias Formation Jurassic Löwenstein Formation Triassic Magnesian Conglomerate Formation Triassic Middle Buntsandstein Formation Triassic Middle Keuper Group/Arnstadt Formation Triassic Middle Keuper Group/Hassberge Formation Triassic Middle Keuper Group/Knollenmergel Formation Triassic Middle Keuper Group/Löwenstein Formation Triassic Middle Keuper Group/Trossingen Formation Triassic Middle Keuper Group/Weser Formation Triassic Newark Group/Cumnock Formation Triassic Newark Group/Lithofacies Association II Formation Triassic Newark Group/Lockatong Formation Triassic Newark Group/New Oxford Formation Triassic Newark Group/Pekin Formation Triassic Newark Group/Vinita Formation Triassic Passaic Formation Triassic Pekin Formation Triassic Rosario do Sul Group/Caturrita Formation Triassic Santa Rosa Formation Triassic Sloan Canyon Formation Triassic Steinmergel Formation Triassic Stockton Formation Triassic Tecovas Formation Triassic Timezgadiouine Formation Triassic Travesser Formation Triassic Upper Keuper/Exter Formation Triassic Upper Keuper/Burgsandstein Formation Triassic Upper Keuper/Feuerletten Formation Triassic Zarzaïtine Group/Lower Zarzaïtine Formation Triassic Zorzino Limestone Formation Triassic