A Geological Tour of Denver, Golden, and Colorado's Front Range

A Theory | Seven Nations | Governments and Empires | Geological Past

Geologic Time Period

Precambrian - 4.565 Billion Years Ago - 545 Million Years Ago (M.Y.A.) (4.6 Billion - 570)
1.7 Billion Years Ago

280-255 (260-250) Million Years Ago - Lyons Formation

Lyons Sandstone

254-208 (250-210) Million Years Ago - Lykins Formation

Lykins Formation

The Lyons Formation

Lyons sandstone and the Dakota Hogback at Red Rocks Park

Lyons sandstone against a backdrop of the Dakota Hogback (Dinosaur Ridge) - Red Rocks Park, Morrison, Colorado.

Sand as far as the eye can see...