|Name||Tuffaceous siltstone and sandstone|
|Geologic age||Middle Eocene to Late Eocene|
Sedimentary > Clastic > Mudstone (Bed)
Sedimentary > Clastic > Siltstone (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Walker, G.W. and MacLeod, N.S., 1991, Geologic map of Oregon: U.S. Geological Survey, scale 1:500,000.
Snavely, P.D., Jr., McLeod, N.S., and Rau, w.w., 1969, Geology of the Newport area, Oregon: The Ore Bin, v. 31, p. 25-71.
McKeel, D.R., 1980, Micropaleontological study of five wells, western Willamette Valley, Oregon: Oregon Department of Geology and Mineral Industries Open-File Report 0-80-1, 21 p.
McDougall, K., 1975, The microfauna of the type section of the Keasey Formation of Northwestern Oregon, in Weaver, D.W., Hornaday, G.R., and Tipton, A., eds., Future energy horizons of the Pacific Coast: Society of Economic Paleontologists and Mineralogists, Pacific Section, Long Beach, California, 1975, p. 343-359.
Baldwin, E.M., 1974, Eocene stratigraphy of southwestern Oregon: Oregon Department of Geology and Mineral Industries Bulletin 83, 40 p.
Bela, J.L., 1981, Geology of the Rickreall, Salem West, Monmouth, and Sidney 7-1/2 ' quadrangles, Marion, Polk, and Linn Counties, Oregon: Oregon Department of Geology and Mineral Industries Geologic Map Series GMS-18, scale 1:24,000.
Niem, A.R., and Niem, W.A., 1985, Oil and tgas investigation of the Astoria Basin, Clatsop and northernmost Tillamook Counties, northwest Oregon: Oregon Department of Geology and Mineral Industries Oil and Gas Investigation OGI-14, scale 1:100,000.
|Counties||Benton - Clatsop - Columbia - Coos - Douglas - Lane - Lincoln - Linn - Marion - Polk - Tillamook - Washington - Yamhill|