Aerial view of the Keystone Thrust fault, southern Nevada. View towards the north. The
Keystone thrust is the leading edge of the Sevier Fold-Thrust Belt in this region. It places the
Cambrian Bonanza King Limestone (gray) over the Jurassic Aztec Sandstone (tan). The Aztec
Sandstone is equivalent to the Navajo Sandstone, which is exposed so beautifully in Zion National
Park.