Saturday, December 12, 2015

PIKES PEAK REGION’S ICONIC ROCKS

Posted By: Unknown - December 12, 2015

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By Steven Wade Veatch

Steamboat Rock and Balanced Rock are well-known tourist attractions in the heart of the Garden of the Gods. These iconic rocks were once privately owned, but today they are part of Colorado Springs’ famous city park.

Steamboat Rock once had steps carved into the rock that went to its top. Tourists eagerly climbed up to the observatory to view the beautiful geological wonders. Balanced Rock, the 700-ton attraction has—for millions years—withstood the inexorable forces of nature, including wind, cycles of freezing and thawing, earthquakes, and relentless erosion. Both scenic rocks are eroded sections of the Fountain Formation, a sandstone composed of unsorted sand and pebbles of many sizes that were washed down from the Ancestral Rocky Mountains.
     
Figure 1. Early photograph of tourists visiting Balanced Rock (R) and Steamboat Rock (L). In this undated photo a man is enjoying the natural beauty of the area with three female companions in a horse-drawn buggy. Curt Goerke, a 14-year-old entrepreneur, began taking photos of tourists in front of the rocks in the 1890s, selling them each for 25 cents. Photo from the collection of S.W. Veatch.




Figure 2.This view of Steamboat Rock, on a postcard, was taken  about 40 years later than the image in figure 1. Few changes are noted in the physical condition of Steamboat rock. A sign read, “Steamboat Rock Observatory. Use of the telescopes free to visitors. All welcome.” Photo from the collection of S.W. Veatch.
The Fountain Formation began to form long before the dinosaurs roamed Colorado.  A rapid mountain uplift, known as the Colorado Orogeny, began 300 million years ago that produced an ancestral range of Rocky Mountains.  Rain and intense thunderstorms produced torrents of water with enough energy to move rock, ranging in size from tiny grains to large clasts.  These eroded sediments—from the Ancestral Rockies nearby to the west—piled up at the base of these ancient mountains as gravels and formed the Fountain Formation.  This rock unit, up to 4,500 feet thick, has a deep red color from the chemical alteration of iron minerals.  The rock fragments in the Fountain Formation are angular indicating the fragments were not deposited far from their sour

A number of the Garden of the God’s landmarks, including Steamboat Rock and Balanced Rock, were shaped by erosion.  Erosion continues today.
     
About the author: Steven Veatch is a writer and geoscientist. His family came to the Cripple Creek and Victor Gold Mining District in the early 1890s where they mined for almost more than three decades. The other side of his family mined in the Caribou District in Boulder County, Colorado. Veatch lives next to the Florissant Fossil Beds National Monument.


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