Innuitian orogeny

The Innuitian orogeny, sometimes called the Ellesmere orogeny, was a major tectonic orogeny (mountain building episode) of the late Devonian to early Carboniferous, responsible for the formation of a series of mountain ranges in the Canadian Arctic and Northernmost Greenland.

[1] The episode started with the earliest Paleozoic rifting, extending from Ellesmere Island to Melville Island.

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Innuitian orogen (the northernmost of the Paleozoic orogens shown in sage green ) surrounded by the Slave and Rae cratons (fuchsia) that constitute the northern core of the North American craton (Laurentia)