| State | Oregon |
|---|---|
| Name | Tuff |
| Geologic age | Tertiary |
| Lithologic constituents | Major
Igneous > Volcanic (Pyroclastic-ash flow)various compositions
|
| Comments | miscellaneous ash-flow tuffs of various Tertiary ages |
| References | Walker, G.W. and MacLeod, N.S., 1991, Geologic map of Oregon: U.S. Geological Survey, scale 1:500,000. |
| NGMDB product | |
| Counties | Douglas - Jackson - Lane - Linn |