Parts of the west coast of the USA during the geological era, represents the last 66 million years of Earth’s history. It is characterized by the dominance of mammals, birds and flowering plants, a cooling and drying climate, and the current configuration of continents. It is the latest of three geological eras since complex life evolved, preceded by the Mesozoic and Paleozoic. It started with the Cretaceous–Paleogene extinction event, when many species, including the non-avian dinosaurs, became extinct in an event attributed by most experts to the impact of a large asteroid or other celestial body.
Igneous, metamorphic, and sedimentary rock types are well-represented in Wasatch Front canyons. igneous rocks: quartz monzonite, (metamorphic rocks: quartzite, slate, gneiss, and marble, and (sedimentary rocks: shale, limestone, sandstone, siltstone, and conglomerate. The age of the rocks ranges from about 3 billion to 24 million years old.
The National History Museum of Utah is a must visit when in Utah.