Photos of Mushroom Rock State Park

Entrada Sandstone (Upper Jurassic) (Goblin Valley, southeast-central Utah, USA) 2 by James St. John

Differential weathering and erosion of interbedded hard quartzose sandstones and relatively soft siltstones and mudrocks have produced an abundance of oddly-shaped features at Goblin Valley, Utah (also known as Mushroom Valley). The reddish-brown color of the rocks is from the presence of hematite (Fe2O3 - iron oxide). This is the Entrada Sandstone, an Upper Jurassic unit consisting of very shallow marine and nonmarine coastal sand dune deposits. The same rocks make up the main scenery at Arches National Park, Utah. Locality: Goblin Valley State Park, southeast-central Utah, USA
Mushroom Rock State Park contains pedestal or mushroom rock formations in the Smoky Hills region of Kansas. They were formed by a process of nonuniform erosion and weathering. Read further
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