During the Cretaceous period between 66 and 144 million years ago, a range of mountains known as the Sevier mountains rose in western Utah. Over millions of years of erosion, streams brought down the mountains and spread their sediment over a broad fan to the east. In some places the sediment reached 15,000 feet deep. At greath depths, the pressure and heat were enough to fuse the river cobbles and mud into a rough conglomerate rock.
Millions of years later regional uplift created Utah's high plateau regions. The San Pitch mountains lie along the western edge of one such plateu and are composed mostly of the uplifted Sevier conglomerate. Here in Maple Canyon and Box Canyon in particular, the ancient river deposits are exposed and cut into slots, hoodoos, arches and amphitheaters.
Utah is a state located in the westcentral region of the United States of America. Utah is the 13th largest state by area, ranks 34th by population and 10th by population density of the 50 United States. Utah was the 45th state to be admitted into the Union, on January 4, 1896. Utah is landlocked, being bordered by the states of Idaho to the north, Wyoming to the northeast, Nevada on the west, Colorado on the east and Arizona to the south. Utah is very mountainous and is a popular outing destination of the outdoorsman. The state population is about 2.82M with 95% being Caucasian, 2.4% Asian, 1.7% Native American and 1.3% Black. The state capital and largest city is Salt Lake City.Source: wikipedia