Cowlitz Formation

Geology

Members: unnamed (47)

Lithologies: not reported (28), "siliciclastic" (1), mudstone (4), "shale" (3), siltstone (6), sandstone (7), conglomerate (2)

Paleoenvironments: marine indet. (32), coastal indet. (1), estuary/bay (2), transition zone/lower shoreface (2), offshore (8), deep-water indet. (2)

Age range: base of the Bartonian to the top of the Late/Upper Eocene or 41.03000 to 33.90000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Bartonian41.03 - 37.71USA (Washington) (36866 52204 52205 52206 52207 52208 52209 81852 139020 158994 160104 160105 160106 160107 180392 180413 180457 200105 201094 201097 201099 201101 201102 201120 201121 201122 201123 201126 201127 201128 201129 201130 201131 201132 201134 207129 238093 238094 238096 238097 241928 241929)
Bartonian41.03 - 37.71USA (Oregon) (78656 207514 207526 233560)
Late/Upper Eocene37.71 - 33.9USA (Washington) (140006)