Are the Boulder Flatirons Remnants of Ancient Beaches?
You will learn how Boulder’s iconic Flatirons formed. Turns out, Boulder was once beachfront property. The Flatirons are Boulder’s favorite portion of the Fountain Formation, a geological formation of mostly red sandstone. This sandstone, more appropriately called “arkose” gets its color from the pinkish feldspar contained it it. This red rock makes up the Red Rocks of Morrison and the Garden of the Gods in Colorado Springs. The Fountain Formation stretches from Colorado Springs all the way to Wyoming. The reddish color is due to the concentration of feldspar in the sandstone,... Read More