Pictured Cliffs Sandstone
This unit is composed of primarily marine sandstone interbedded with thin layers of shale and is similar in composition, fossil assemblages, and depositional environment to the Intermediate unit of the Cliff House Sandstone. This unit is the youngest unit in the park and overlies the Lewis Shale. The Pictured Cliffs Sandstone represents the final regression of the Western Interior Seaway from northwestern New Mexico.
Did You Know?
Most of the 184 members of the first Civilian Conservation Corp camp at Chaco came all the way from South Philadelphia, Pennsylvania. Enrollees complained about the poor food, broken movie projector, and limited nearby recreation, and nine men deserted before the end of their service. More...