Shedhorn Formation

Geology

Members: unnamed (9), Lower (3), Upper (2)

Lithologies: "siliciclastic" (1), sandstone (13), "limestone" (1)

Paleoenvironments: marine indet. (7), coastal indet. (7)

Age range: base of the Wordian to the top of the Capitanian or 266.90000 to 259.51000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Wordian266.9 - 264.28USA (Wyoming) (11225 11226 61949 105280)
Wordian266.9 - 264.28USA (Montana) (11276 11277)
Capitanian264.28 - 259.51USA (Wyoming) (105272 105275)
Capitanian264.28 - 259.51USA (Montana) (81427 83005 89395 105345 105346 105348)