Erratic Behavour in Edgemont EarthCache
Erratic Behavour in Edgemont
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This deposit from a passing glacier now sits on a hill side in the community of Edgemont.
This large rock is part of a glacial feature known as "erratics". If you've done earthcaches near Calgary before, you're likely familiar with them; they are rocks that are not from the immediate area, but were transported here during the last Ice Age and dropped when the glacier carrying them melted.
As the Athabasca Glacier came from the north and flowed towards the south, parts of mountains in the north crumbled - somewhere around Jasper - and the rocks landed atop the glacier. As the glacier moved it carried the rocks southward until the glacier melted enough to release the rock from atop itself.
The erratics in and around Calgary are part of the "Foothills Erratic Train", one of the longest groups of glacial erratics in the world, and containing the largest erratic in the world: the Okotoks Erratic. (Which is itself and earthcache.)
TO LOG THIS CACHE: you must email to the owner the estimated size (length, width and height) of the rock. Also, estimate the weight of the rocks. A photo should accompany your log.
Additional Hints
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