Old Rocks 7 billion years ago during the Precambrian Era. 0 billion years old, making them among the oldest rocks found in the United States. 6 billion years ago, massive volumes of magma pushed into ...

Introduction -- Pioneer geologists of the American West / Dr W. Lyle Dockery -- Physical geology -- Regional geography -- Cities, towns and highways / American Association of Petroleum Geologists and ...

Over 4.1 million people visited the park last year, making it the fifth most visited national park in America, according to National Park Service statistics. It’s so busy in the summer that timed ...

Nonresidents who visit Rocky Mountain National Park will have to pay a premium to get into the park, starting in January.

As Lancaster County baked in sweltering heat two weeks ago, with temperatures holding steady for days in the upper 90s, fields of snow covered north-facing slopes high in the Rocky Mountains. Rocky ...

Sometimes the best way to explore the grandeur of the Rocky Mountains is on two wheels, and Colorado's mountain bike capital doesn't disappoint.

Colorado National Parks are some of the most diverse and stunning in the United States. The state is the 'Gateway to the ...

Melting ice high up in the Rocky Mountains has revealed an impeccably preserved forest, frozen in time for thousands of years. Beartooth Plateau, which sits at an altitude of over 10,000 feet (3,000 ...

Navajo sand sea of near-equatorial Pangea / David Loope, Len Eisenberg, and Erik Waiss -- Strike-slip tectonics and thermochronology of northern New Mexico / Eric A. Erslev ... [et al.] -- Structural ...