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Makah Formation

Geology

Members: unnamed (16), Jansen Creek (10)

Lithologies: not reported (6), "siliciclastic" (1), mudstone (5), "shale" (1), siltstone (3), sandstone (6), conglomerate (5), "limestone" (5)

Paleoenvironments: marine indet. (8), shallow subtidal indet. (1), basinal (carbonate) (4), basinal (siliceous) (6), offshore (1), deep-water indet. (6)

Age range: base of the Rupelian to the top of the Early/Lower Oligocene or 33.90000 to 27.30000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Priabonian - Rupelian37.71 - 27.3USA (Washington) (222795 222796)
Early/Lower Oligocene33.9 - 27.3USA (Washington) (172000 193971 205036)
Rupelian33.9 - 27.3USA (Washington) (120417 45805 45806 45807 45808 62246 120368 193568 202154 202283 205037 205040 205194 205196 205208 205210 205211 206137)
Oligocene33.9 - 23.04USA (Washington) (206133 206134)
Rupelian - Chattian33.9 - 23.04USA (Washington) (205212)