How Did Independence Rock Form

As Independence Rock was slowly uncovered by erosion, the immense pressures of the weight of overlying rock were gradually lessened. The rock then expanded outwardly shedding its surface layers like an onion. Layers of granite broke off, one after the other and formed the rounded shape you see today.

What is Independence Rock made of?

Independence Rock is a large granite rock, approximately 130 feet (40 m) high, 1,900 feet (580 m) long, and 850 feet (260 m) wide, which is in southwestern Natrona County, Wyoming along Wyoming Highway 220.

Why is it called Independence Rock?

Independence Rock – Natrona County, Wyoming An oval outcrop of granite rock, it is 1,900 feet long, 700 feet wide, and rises 128 feet above the range. The rock derived its name from a party of fur trappers who camped there and celebrated Independence Day in their own style on July 4, 1830.