One the great things about Utah is that even when not going to the National Parks, there's literally countless little geological oases that one can find themselves in. One of my favorites is a little campsite/park called the Red Cliffs Recreation Area just outside of St. George, Utah. The park straddles the line between two geological formations, the Kayenta Formation and the Navajo Sandstone, with the boundary between the two running right through the middle of the campground.
|A cross-bedding diagram. Image courtesy of Teach the Earth.
A little bit of a ways to the south of the Red Cliffs Recreation Area is the Quail Creek Reservoir, which is a great place to spend the afternoon. They allow boating and swimming, but what I want to focus on is this great anticline across the water. We are looking towards the northeast but the anticline cuts right through the middle of the reservoir basically towards where I am standing. These are Triassic age rocks of the Moenkopi Formation and the Chinle Formation, which are older than the rocks found just to the north in Red Cliff Recreation Area and would be located below those rocks.