Port Orford Formation
Port Orford Formation is a geologic formation in Oregon, United States that preserves fossils. It lies between the Empire Formation below and the Elk River Beds above. The sequence starts with a basal buff-yellow sand, topped by a conglomerate layer, followed by rusty sand that grades upward into blue-gray, clay-rich sand. This upper part is truncated by the sea, with the Elk River Beds resting on top. The formation was named by Ewart M. Baldwin in 1945.
This page was last edited on 2 February 2026, at 15:18 (CET).