Marine facies (ORTtvm;0)

State	Oregon
Name	Marine facies
Geologic age	Middle Eocene to Late Eocene
Original map label	Ttvm
Primary rock type	basalt
Secondary rock type	volcanic breccia (agglomerate)
Other rock types	andesite; dacite; sandstone; siltstone; conglomerate
Lithologic constituents	Major Igneous > Volcanic > Mafic-volcanic > Basalt (Volcaniclastic, volcanic breccia) Igneous > Volcanic > Mafic-volcanic > Basalt (Flow) Minor Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Flow) Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Volcaniclastic, volcanic breccia) Igneous > Volcanic > Mafic-volcanic > Basalt (Pyroclastic, tuff) Incidental Sedimentary > Clastic > Conglomerate (Bed) Sedimentary > Clastic > Siltstone (Bed) Sedimentary > Clastic > Sandstone (Bed) Igneous > Volcanic > Felsic-volcanic > Dacite (Pyroclastic, tuff) Igneous > Volcanic > Felsic-volcanic > Dacite (Volcaniclastic, volcanic breccia) Igneous > Volcanic > Felsic-volcanic > Dacite (Flow) Igneous > Volcanic > Mafic-volcanic > Basaltic-andesite (Pyroclastic, tuff)
Map references	Walker, G.W. and MacLeod, N.S., 1991, Geologic map of Oregon: U.S. Geological Survey, scale 1:500,000.
Unit references	Walker, G.W. and MacLeod, N.S., 1991, Geologic map of Oregon: U.S. Geological Survey, scale 1:500,000. Wells, R.E., Niem, A.R., MacLeod, N.S., Snavely P.D., Jr., and Niem, W.A., 1983, Preliminary geologic map of the west half of the Vancouver (Washington-Oregon) 1ø by 2ø quadrangle: U.S. Geological Survey Open-File Report 83-591, scale 1:250,000. [http://pubs.er.usgs.gov/publication/ofr83591] Mallory, V.S., 1959, Lower Tertiary biostratigraphy of the California Coast Ranges: Tulsa, Oklahoma, American Association of Petroleum Geologists, 416 p.
Geographic coverage	Tillamook