Sweeney Member

Geology

Formation: Hopkinton

Lithologies: lime mudstone (1), packstone (1)

Paleoenvironments: deep subtidal ramp (1)

Age range: Aeronian or 440.50000 to 438.60000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Aeronian440.5 - 438.6USA (Iowa) (25039)