Gifts of the Glaciers

glacial boulder on grass

WILDER SIDE OF OAKLAND COUNTY

Oakland County is a landscape created by the incredible power of glaciers. Glacial erratics are perhaps the most intriguing of all our glacial landforms, but the name “erratic” often causes confusion for those unaware of our natural history and the science behind glacial geology. It should not be, for in reality, there is nothing mysterious about those two words: glacial erratic, when they are used in combination. Glacial erratics are rocks and boulders of any size that were scraped up from the earth, or fractured from bedrock by a glacier, and then carried by the glacier, and finally deposited in an erratic fashion as the glaciers melted and retreated. That event last occurred during the end of the Pleistocene Epoch about 13,000 years ago, a time we refer to as the Ice Age. It was the time glaciers covered much of our planet and created the landforms and lakes of present-day Oakland County.

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