Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Yamhill Formation  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Cenozoic | |
| ...Paleogene | |
| ....Eocene | |
| .....Yamhill Formation | |
| RT | Oregon |
| SN | Comprises Mill Creek Beds, of predominantly dark-gray shale and siltstone with occasional beds of lime-cemented sandstone, and an overlying sequence of massive sandstone beds which grades upward into more argillaceous rock. In W Oregon. |