Jul 15th, 2013 Archives

Sylvan Dale Guest Ranch is a great place to visualize patterns and processes of Earth’s history. Earth science students from local middle and high schools as well as the University of Colorado, the University of Northern Colorado, and Colorado State University often use the Ranch for field trips. Patterns of geology are the foundation for everything else, from vegetation to human land use to the awe-inspiring scenery.

Several of the great ages of Earth are on display at Sylvan Dale.

The granite and schist of Green Ridge, Inspiration Point, and Alexander Mountain represent the Precambrian Era.

A view across 1.8 billion years:

A view across 1.8 billion years: from Ice Age Little Canyon of the Big Thompson
to Pre-Cambrian rocks of Alexander Mountain. ⇱

The Paleozoic Era, the “Age of Fishes and Amphibians,” is represented by the Fountain Formation, the oldest of local sedimentary rocks. Most of our sedimentary rocks are from the Mesozoic Era, the “Age of Reptiles.” Cenozoic rocks, from the “Age of Mammals,” are missing from our immediate area, eroded to sandy bits, hauled downstream, gone to rest in the Gulf of Mexico. The last 2 million years, Read more on Earth History at Sylvan Dale Guest Ranch…

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