The roughly 16,500-tonne Okotoks Erratic is a glacial erratic. Alberta erratics were traced more than 300 km (190 miles) from their sources and transported by glacier ice, which can move boulders of this size without crushing them. The video argues that catastrophic icebergs carried the boulders and carved the Missouri River Valley, including a 100-mile-wide flood near St. Louis; those claims are not established by the cited geological evidence.
Glacial ice—not catastrophic icebergs—carried Alberta’s giant erratics
Key facts
- The Okotoks Erratic weighs about 16,500 metric tonnes, roughly 18,000 short tons.
- Geological sources state that Alberta erratics were transported more than 300 km (190 mi) from their sources by glacial ice.
- Glaciers can transport and deposit boulders of this size without crushing them.
- The video links the boulders and Missouri River Valley to catastrophic iceberg floods; the cited evidence does not establish that theory or a 100-mile-wide flood near St. Louis.
Sources
Glacial erraticen.wikipedia.org
transported by glaciers, Alberta were determined to have been transported over 300 kilometres (190 mi) from their source.
Glacial erratics - AntarcticGlaciers.organtarcticglaciers.org
Glacial erratics are boulders of bedrock that have been transported by a glacier and deposited elswehere, on a different type of bedrock.
Okotoks Erratic | Canada's Albertatravelalberta.com
The Okotoks Erratic is the largest known rock in the Foothills Erratics Train, a narrow band of rocks carried by ice along the mountainfront and deposited as ...
Okotoks Erraticcyark.org
Alberta (Canada) and Montana (USA) contain several thousand erratics along what is known as the Foothills Erratics Train. More recent in its history, Big Rock ...
Ice Age: Glacial Erratic - Canada (Ontario) Beneath Our Feetontariobeneathourfeet.com
How Far Can A Glacial Erratic Be Transported? Glaciers can transport rock and ground up rock over distances of meters, to hundreds of kilometers. · How Big Are ...
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