Williamson Formation

Geology

Group: Clinton

Members: unnamed (8)

Lithologies: "siliciclastic" (1), claystone (1), "shale" (15), siltstone (2), grainstone (3), "limestone" (3)

Paleoenvironments: marine indet. (8), open shallow subtidal (1), deep subtidal shelf (3), offshore shelf (1), offshore (4)

Age range: base of the Telychian to the top of the Wenlock or 438.50000 to 427.40000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Llandovery443.4 - 433.4USA (New York) (77051 77052 77054 77081)
Llandovery - Wenlock443.4 - 427.4USA (New York) (12929)
Telychian438.5 - 433.4USA (New York) (26865 76267 76268 77053 81820 81825 81878 81909 82554 82558)
Wenlock433.4 - 427.4USA (New York) (779 741)