Image: Bigrock

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Description: Big Rock (glacial erratic). Big Rock (also known as Okotoks Erratic) is a glacial erratic situated between the towns of Okotoks and Black Diamond, Alberta, Canada (18 kilometres south of Calgary). The 15,000 tonne (16,500 short ton) quartzite boulder is one of the world's largest known glacial erratics.
Title: Bigrock
Credit: Transferred from en.wikipedia to Commons by Lukas9950 using CommonsHelper.
Author: Coaxial at English Wikipedia
Usage Terms: Creative Commons Attribution 3.0
License: CC BY 3.0
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