The Red Butte gets its name from the nugget sandstone formation, deposited as sand dunes 150 to 200 million years ago. The Red Butte Canyon sandstone was once quarried for use in construction. The old Salt Lake City Hall, located across the street from the State Capitol building, is constructed of the rock brought down by rail car. Several old houses in the area on Capitol Hill are also constructed of the same material.
On this cold January morning, the valley below is locked in an atmospheric inversion, when cold air traps fog and pollution below that cannot rise through the warmer air above. The surrounding mountains also help trap the pooled cold air and the ground cover of snow insures that temperatures near the ground will remain near or below freezing. That morning, the 2.5 particulate index was near 40. By way of comparison, on the same day in Beijing the PM2.5 was near 200.
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