Eocene nonmarine rocks (WAEOc;0)

State	Washington
Name	Eocene nonmarine rocks
Geologic age	Eocene
Lithologic constituents	Major Sedimentary > Clastic > Sandstone > Arkose (Bed) Minor Igneous > Volcanic > Felsic-volcanic > Rhyolite Igneous > Volcanic > Mafic-volcanic > Basalt Sedimentary > Clastic > Siltstone (Bed) Incidental Sedimentary > Coal > Bituminous (Bed) Metamorphic > Metasedimentary > Metaclastic > Argillite Sedimentary > Clastic > Conglomerate (Bed) Sedimentary > Clastic > Mudstone > Shale (Bed) Igneous > Volcanic (Pyroclastic-tuff) Igneous > Volcanic > Mafic-volcanic > Andesite
Comments	Naches Formation is mostly basaltic and rhyolitic volcanic rock with minor andesitic rock and interbedded sedimentary rock (feldspathic sandstone) (Tabor and others, 1993, Stout, 1964). The thickness of the Naches Formation is 8000-10000+ feet thick (Stout, 1964).
Stratigraphic units	Manastash Formation; Naches Formation; Roslyn Formation; O'Brien Creek Formation (in part)
References	Huntting, M.T., Bennett, W.A.G., Livingston, V.E.Jr., and Moen, W.S., 1961, Geologic Map of Washington: Washington Division of Mines and Geology, scale 1:500,000. Muessig, S., 1967, Geology of the Republic Quadrangle and a Part of the Aeneas Quadrangle, Ferry County, Washington: U. S. Geological Survey Bulletin 1216, 135 p. Foster, R.J., 1960, Tertiary Geology of a Portion of the Central Cascade Mountains, Washington: Geological Society of America Bulletin v. 71, no. 2, p. 99-126. Tabor, R.W., Frizzell, V.A.,Jr., Booth, D.B., Waitt, R.B., Whetten, J.T., Zartman, R.E., 1993, Geologic Map of the Skykomish River 30- by 60-Minute Quadrangle, Washington: U. S. Geological Survey Miscellaneous Investigations Series Map I-1963, scale 1:100,000. Tabor, R.W., Waitt, R.B.,Jr., Frizzell, V.A.,Jr., Swanson, D.A., Byerly, G.R., Bentley, R.D., 1982, Geologic Map of the Wanatchee 1:100,000 Quadrangle, Central Washington: U. S. Geological Survey Miscellaneous Investigations Series Map I-1311, scale 1:100,000. Stout, M.L., 1964, Geology of a Part of the South-Central Cascade Mountains, Washington: Geological Society of America Bulletin, v. 75, no. 4, p 317-334.
NGMDB product	NGMDB product page for 30777
Counties	Ferry - King - Kittitas - Lewis - Skamania - Yakima

State

Washington

Name

Eocene nonmarine rocks

Geologic age

Eocene

Lithologic constituents

Major

Sedimentary > Clastic > Sandstone > Arkose (Bed)

Minor

Igneous > Volcanic > Felsic-volcanic > Rhyolite

Igneous > Volcanic > Mafic-volcanic > Basalt

Sedimentary > Clastic > Siltstone (Bed)

Incidental

Sedimentary > Coal > Bituminous (Bed)

Metamorphic > Metasedimentary > Metaclastic > Argillite

Sedimentary > Clastic > Conglomerate (Bed)

Sedimentary > Clastic > Mudstone > Shale (Bed)

Igneous > Volcanic (Pyroclastic-tuff)

Igneous > Volcanic > Mafic-volcanic > Andesite

Comments

Naches Formation is mostly basaltic and rhyolitic volcanic rock with minor andesitic rock and interbedded sedimentary rock (feldspathic sandstone) (Tabor and others, 1993, Stout, 1964). The thickness of the Naches Formation is 8000-10000+ feet thick (Stout, 1964).

Stratigraphic units

Manastash Formation; Naches Formation; Roslyn Formation; O'Brien Creek Formation (in part)

References

Huntting, M.T., Bennett, W.A.G., Livingston, V.E.Jr., and Moen, W.S., 1961, Geologic Map of Washington: Washington Division of Mines and Geology, scale 1:500,000.

Muessig, S., 1967, Geology of the Republic Quadrangle and a Part of the Aeneas Quadrangle, Ferry County, Washington: U. S. Geological Survey Bulletin 1216, 135 p.

Foster, R.J., 1960, Tertiary Geology of a Portion of the Central Cascade Mountains, Washington: Geological Society of America Bulletin v. 71, no. 2, p. 99-126.

Tabor, R.W., Frizzell, V.A.,Jr., Booth, D.B., Waitt, R.B., Whetten, J.T., Zartman, R.E., 1993, Geologic Map of the Skykomish River 30- by 60-Minute Quadrangle, Washington: U. S. Geological Survey Miscellaneous Investigations Series Map I-1963, scale 1:100,000.

Tabor, R.W., Waitt, R.B.,Jr., Frizzell, V.A.,Jr., Swanson, D.A., Byerly, G.R., Bentley, R.D., 1982, Geologic Map of the Wanatchee 1:100,000 Quadrangle, Central Washington: U. S. Geological Survey Miscellaneous Investigations Series Map I-1311, scale 1:100,000.

Stout, M.L., 1964, Geology of a Part of the South-Central Cascade Mountains, Washington: Geological Society of America Bulletin, v. 75, no. 4, p 317-334.

NGMDB product

NGMDB product page for 30777

Counties

Ferry - King - Kittitas - Lewis - Skamania - Yakima