Tag Archive for: American Fork Canyon

Mary Ellen Gulch, American Fork Canyon, Utah County, Utah
Photographer: Tyler Knudsen; © 2013

Quartzite of the 900 million-year-old Big Cottonwood Formation holds up the rugged headwall of Mary Ellen Gulch. Well-preserved ripple marks and mud cracks indicate the Big Cottonwood Formation was deposited in the tidal zone of a shallow sea.

Pittsburg Lake, Utah County, Utah
Photographer: Sonja Heuscher

Pittsburg Lake, a glacial tarn formed in a cirque carved into the Cambrian-age Tintic Quartzite in upper American Fork Canyon, Utah County.