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Roubideau Canyon, Montrose County

White water-soluble salts precipitating and encrusting sandstone surface at a groundwater seep from the Salt Wash Member of the Morrison Formation in Roubideau Canyon, Montrose County, Colorado, April 2020. Photo credit: hopkins/neoscenes
White water-soluble salts precipitating and encrusting sandstone surface at a groundwater seep from the Salt Wash Member of the Morrison Formation in Roubideau Canyon, Montrose County, Colorado, April 2020. Photo credit: hopkins/neoscenes

Trinidad Lake State Park, Colorado

The K–Pg (Cretaceous-Paleogene) boundary exposure at Longs Canyon in Trinidad Lake State Park, Colorado, shows an abrupt change from dark- to light-colored rock, October ©2019 hopkins/neoscenes.
The K–Pg (Cretaceous-Paleogene) boundary exposure at Longs Canyon in Trinidad Lake State Park, Colorado, shows an abrupt change from dark- to light-colored rock, October ©2019 hopkins/neoscenes.