Flatirons-Boulder, CO

The Fountain Formation, of which the iconic Boulder Flatirons are formed, is a conglomerate sandstone deposited at the delta of a river outlet that carried sediment of all sizes from the top of the Ancestral Rockies to the shores of an ancient inland sea. The same formation forms other iconic features such as Red Rock Amphitheater and Garden of the Gods. Long after the sediment was deposited, a continental collision uplifted the layers of rock. This deposit is harder than the surrounding layers and erodes more slowly, allowing for the sharp relief of these features.

This print is accented by pigments ground from 3 different outcroppings of the Fountain Formation-one for each flatiron.

Calligraphy Pen and Homemade Pigments, Plein Air

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