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Stop 9: Triassic Cuesta

The last stop on the tour displays rock from a huge ancient river.

Stop 9: Triassic Cuesta

Grey conglomerate rocks with large rocks of different colors and types set into it. 

Late Triassic sandstone and conglomerate form a ridge here, also known as a cuesta. These 230-million-year-old rocks represent huge, Mississippi-size rivers that flowed from what is now Texas to a seashore near what is now the Utah-Nevada border.

Painting of ancient triassic riverbed ecosystem with giant salamander-like amphibians at the river with tall trees around.

Artist's representation of a giant Triassic salamander-like amphibian.

This page was last updated on: February 11, 2022.