Graylock Formation

Geology

Members: unnamed (25)

Lithologies: siltstone (1), "limestone" (9), "carbonate" (15)

Paleoenvironments: marine indet. (10), carbonate indet. (15)

Age range: base of the Angulata to the top of the Sinemurian or 201.40000 to 192.90000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Angulata201.4 - 199.5USA (Oregon) (157506 157507 157508 157616 157617 157626 157627 157628 157629)
Hettangian201.4 - 199.5USA (Oregon) (127236 200706 200707 200708 200709 200710 201166 201167 201168 201169 201170)
Sinemurian199.5 - 192.9USA (Oregon) (201171 201172 201173 201174 201175)