Complex sentence: A prominent feature of the park is Zion Canyon, which is 15 miles (24 km) long and up to half a mile (800 m) deep, cut through the reddish and tan-colored Navajo Sandstone by the North Fork of the Virgin River.
Split into simpler sentences: A prominent feature of the park is Zion Canyon, which stretches 15 miles (24 km) long and spans up to half a mile (800 m) deep. It cuts through the reddish and tan-colored Navajo Sandstone by the North Fork of the Virgin River.