How large is the area of the Animikie Group?
Animikie Group
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The Huronian Supergroup on the north shore of Lake Huron in Ontario[35] overlies an Archean basement.[36] On the map it is the formation north of both Lake Huron and the Grenville Front Tectonic Zone. Huronian sedimentary rocks form a 300km (190mi) east–west fold belt and reach a thickness of 12km (7.5mi) near Lake Huron.[37]:266 Deposition of sediments began 2,450 to 2,219 million years ago and continued until 1,850 to 1,800 million years ago when the rocks were deformed and metamorphosed during the Penokean orogeny.[37]:264–6 The supergroup's sedimentary layers are divided into lower and upper sequences.[37]:265 The lower sequence is subdivided into the Elliot Lake, Hough Lake and Quirke Lake groups; the upper sequence is the Cobalt Group.[37]:265 The lower sequences were deposited in a continental rift basin and the upper sequence was deposited in a stable passive margin.[37]:267