Worlds oldest Rock EarthCache
Geocaching HQ Admin: It has now been over 30 days since Geocaching HQ submitted the disabled log below and, unfortunately, the cache owner has not posted an Owner maintenance log and re-enabled this geocache. As a result, we are now archiving this cache page.
More information in the Help Center
-
Difficulty:
-
-
Terrain:
-
Size: 
(not chosen)
Please note Use of geocaching.com services is subject to the terms and conditions
in our disclaimer.
this is a quiet roadside stop with little bit of earth history
3,800,000,000 geologists estitate that Granitic Gneiss rock
formations were created by volcanic activity in the area. These gray, red and pinkish colored rocks created by the lava pushing up deforming the earth in the area and creating mountains four miles high. For hundreds of thousands of years water and glacier movement eroded the mountains away to the now day
river valley area.
The last glacier movement created lake Agassiz. The lake was was a huge body of water, which at times covering areas totaling over 110,000 square miles with depths up to 600-700 feet deep . Lake Agassiz drained in a variety of directions over the years. 9,900-9,200 years ago, Lake Agassiz drained through the Minnesota River Valley. Lake Agassiz overtopped a moraine dam (near present day Browns Valley) and an outlet river was created. This outlet, called Glacial River Warren, drained south and carved thepresent day Minnesota River Valley.
On the south side of the river and a few miles east ,archeologist have discovered such things as spearheads, knives, hide scrapers and other stone tools in association with extinct forms of bison. The finding of these item have been reported to date back to 6400 years ago.
To log this earthcache do the following:
1. post a picture of you or your geocaching group holding your gps
in front of the waymark found at the cache location.
2. Email us thru geocaching with the following question answers.
A. What is the altitude when you stand on the rock behind the waymark.
B. What is the main color of the huge granite core sample
C. What year was the waymark placed
Please Do not post your answers in your log.
check out the waymarks and a couple geocaches nearby
Additional Hints
(No hints available.)
Treasures
You'll collect a digital Treasure from one of these collections when you find and log this geocache:
Loading Treasures