| Port Orford Formation | |
| Type: | Formation |
| Prilithology: | Sand, Conglomerate |
| Region: | Oregon |
| Country: | United States |
| Underlies: | Elk River Formation |
| Overlies: | Empire Formation |
The Port Orford Formation is a geologic formation in Oregon. It preserves fossils. It consists of beds lying unconformably between the Empire Formation and overlying terrace deposits.[1] The formation is composed of a basal bed of buff (yellow-brown) sand, overlain by a layer of conglomerate, and layer of rusty sand grading upward into blue-gray argillaceous sand, which is then truncated by the sea, on top of which are the Elk River Beds. The name was proposed by Ewart M. Baldwin in 1945.[2]