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The Amazing Balanced Rock

A cache by Tank and Spaz Send Message to Owner Message this owner
Hidden : 05/01/2011
1.5 out of 5
2 out of 5

Size: Size: other (other)

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Geocache Description:

In order to complete this cache, you must visit Garden of the Gods. No armchair Earthcaching is allowed. Please go to the site, to learn and answer the questions. There are three informational signs in the area that can assist you in answering the questions.

A special thank you to Bret Tennis at Garden of the Gods Park for his assistance in creating, reviewing, and authenticating the educational information of the cache.

The story of the rocks seen in the Garden of the Gods Park begins over 300 million years ago when a different set of Rocky Mountains existed here. This first set of Rocky Mountains is known as the Ancestral Rockies, which were composed of the same granite (igneous rock type) that Pikes Peak is made of today. Pikes Peak granite has been dated at 1.6 billion years in age using geologic radiometric dating methods. This means that the granite that composed previous mountains, and our current Pikes Peak, formed during the Pre-Cambrian age as a large batholith, known as the Pikes Peak Massive. This batholith of granite gets pushed up (uplifted) during mountain building episodes, called orogenies, which are caused by forces of plate tectonics. There have been 3 mountain building periods in the Pikes Peak area:

1. The Ancestral Rockies occurred approximately 300 million years ago. The erosion of these first Rocky Mountains formed the sedimentary Fountain Formation conglomerate layers, and the Lyons sandstones.

2. The Laramide Orogeny occurred approximately 70 – 80 million years ago. This phenomenon was caused by plate tectonics. The Pacific Plate dove under the North American Plate, causing the continent to buckle, and uplifted the Front Range, giving us a second set of Rocky Mountains. These also eroded away.

3. Pikes Peak was uplifted during a third mountain building time approximately 10 million years ago. It is currently being eroded by many factors, particularly ice. The bowls on Pikes Peak were scoured out by glaciers during the last Ice Age that ended 10,000 years ago.

The Garden of the Gods Park is composed entirely of sedimentary rock layers, and is unique because the rock layers have been tilted upright and exposed in dramatic fashion. Each ridge and valley represents a different period of environment from the past 65 to 300 million years of Earth’s history. Erosion has sculpted these rocks into fascinating shapes.

Around 300 Million years ago, the Ancestral Rockies once stood here. Over time, the forces of wind and water eroded the magnificent peaks into swift streams full of sediments. Them sediments were eventually pressed and cemented into solid rock. The new rocks took the form of:

1) sands full of iron oxide creating red sandstone rock,
2) muds forming softer, more delicate shales, and
3) a mixture of sand and pebbles called conglomerate.

Balanced rock was exposed more than 60 million years ago when the existing Rocky Mountains rose. To make its current shape, the soft bottom layer of shale eroded much faster than the harder sandstone and conglomerate above. Amazingly, the narrow pedestal supporting Balanced Rock has held the 700-ton weight for thousands of years.

To get credit for this find, answer the following questions:

1. Identify, of the three primary types, what type of rock that Balanced Rock is.

2. Due to the uniqueness of this feature, estimate its height, widths, and circumference.

3. Since this is very abundant ecosystem for animals, what type of trees are found here?

4. Identify at least three animals that come here to gather food.

5. Who started photographing the rock for tourists and how much did it cost?

6. Optional: Please post a picture of yourself/team at the site with your GPS.

Answers with "I dont know; Cant find it; etc..," or failing to answer the first four questions will cause your log to be deleted.

Each person who logs a find must submit their own answers, no group emails.

Please be mindful to remain on all paved and hard surfaces.

Do not go off-roading or damage the natural habitat in any way.

This is a learning opportunity, that many will want to join in on, so CITO and leave no trace when visiting.

I do not reply to correct answers. So please log your find once you have completed the cache and submitted your answers. If there are any concerns, I will contact you.


For additional information try these books:
Roadside Guide to Colorado, John Chronic
Prairie, Peak and Plateau, John and Halka Chronic
Geology of the Pikes Peak Region, Colorado, Richard Hubbard and Danny Wyatt
Introduction to the Geology of the Colorado Springs Region, Jeffrey B. Noblett
Garden of God’s, Paul Nesbit
Prehistoric Journey: A History of Life on Earth, Johnson& Stucky

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Additional Hints (Decrypt)

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Decryption Key


(letter above equals below, and vice versa)



1,130 Logged Visits

Found it 1,115     Write note 14     Publish Listing 1     

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Coordinates are in the WGS84 datum

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