Langston Formation

Geology

Members: unnamed (4), Lead Bell Shale (1), Naomi Peak Limestone (1), Spence Shale (6)

Lithologies: mudstone (3), "shale" (5), "limestone" (6)

Paleoenvironments: marine indet. (4), carbonate indet. (4), deep subtidal ramp (3), deep subtidal shelf (1)

Age range: base of the Wuliuan to the top of the Steptoean or 509.00000 to 493.50000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Delamaran511.2 - 506.5USA (Idaho) (207 90621)
Delamaran511.2 - 506.5USA (Utah) (90588)
Delamaran - Marjumian511.2 - 497.0USA (Idaho) (225267 225269)
Wuliuan509.0 - 504.5USA (Idaho) (236011)
Middle Cambrian509.0 - 497.0USA (Utah) (80121 80122)
Menevian504.5 - 499.5USA (Idaho) (50208 50218)
Steptoean497.0 - 493.5USA (Utah) (216945)
Merioneth497.0 - 485.4USA (Idaho) (198)