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Tory Rock Glacial Erratic EarthCache

Hidden : 4/28/2008
Difficulty:
1.5 out of 5
Terrain:
2.5 out of 5

Size: Size:   not chosen (not chosen)

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Geocache Description:


Tory Rock Glacial Erratic

This area is typical of many Adirondack areas: a mixed forest of deciduous and evergreen trees. An old and currently active logging road will serve as your trail to the Tory Rock. As with much of the landscape in this area, you will not feel as if you are deep in woods as it is very similar to preserves and parks located throughout New York. There is a stream that runs close to here. Open toed shoes should be fine to get to the Tory Rock but a decent hiking shoe with a sturdy sole will do much better. At times the area may be a tad muddy so come prepared for the worse and hope for the best!



Glacial erratics are boulders that seem to have been dropped out of nowhere. They are called "erratic" because they are not like any of the other native rocks in the surrounding area where they are found and “glacial because they were transported from one area to another by a glacier. Geologists identify erratics by studying the surrounding rocks, the shape of the erratic and the composition of the erratic itself. These rocks were often carried over hundreds of miles and can range in size from pebbles to large boulders such as Big Rock (16,500 tons) in Alberta and many unlikely examples in Staten Island and Central Park.

As glaciers advance push and scrape anything in their path and either grind them into pieces along the way or carry them along within the great mass of ice. As a glacier begins to melt (recede) it drops all of the material it has been carrying, similar to a stream, its drops the heaviest items first. Often, the presence of erratics is used to determine the leading edge or edge zone of the glaciers advance.

Erratics were once considered evidence of a massive flood approximately 10,000 years ago, similar to the legendary floods described in the texts of ancient civilizations throughout the world. Ancient legends of an epic flood come from many cultures including Mesoamerican, Sumerian (Epic of Gilgamesh), Hebrew (Old Testament) and Indian culture. In the 19th Century, many scientists came to favor erratics as evidence for the end of the last glacial maximum (ice age) 10,000 years ago, rather than a flood.

Some Geologists have suggested that landslides or rock falls initially dropped the rocks on top of glacial ice. The glaciers continued to move, carrying the rocks with them. When the ice melted, the erratics were left in their present locations. The commonly accepted theory is that these large pieces of rock were broken off by mechanical weathering and/or the scouring action of the glacier and carried along with the rest of the baggage. They were eroded and rounded during the ride within the glacier and then dropped at another location.

Please try to keep your environmental impact to a minimum. Stick to the trails and keep off the moss!


In order to earn your smiley for this earth cache, you will need to do a few things.


  1. Estimate the height of this erratic.
  2. Estimate the girth of this erratic. A fun way to do this is to measure yourself from fingertip to finger tip. Work your way around the erratic and then give me your estimate. Make some fun of the event and use multiple people!
  3. Post a photo of somebody in front of the erratic who is either sitting or kneeling. This will make it tougher for others to estimate its height from just a photo!





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