Union Wash Formation

The Union Wash Formation is a geologic formation in the Inyo Mountains, east of Lone Pine in Inyo County, California.

It is of the Early Triassic epoch in the Triassic Period, during the Mesozoic Era.

Fossils
It preserves fossils dating back to the Triassic period. They include Inyoites owenii, from the Meekoceras bed of the formation, and Ammonoids.

The sites are protected within the Southern Inyo Mountains Wilderness of the Inyo National Forest.