Caledonian orogeny

…by a mountain-building event, the Caledonian orogeny, that established a mountain chain stretching from present-day eastern North America through Greenland, western Scandinavia, Scotland, Ireland, and northern England and south to the fringes of western North Africa. Considerable igneous activity was associated with the Caledonian orogenic belt, both intrusive (emplacement of…

The Caledonian orogeny (at the close of the Silurian Period) produced tectonic-metamorphic events along the east coast of North America, Greenland, the British Isles, Fennoscandia (the region made up of Scandinavia, Finland, and northwestern Russia), Central Asia, and

…mountain system that includes both Caledonian and Hercynian elements. It extends from the Queen Elizabeth Islands through Peary Land and along the east coast of Greenland. Mountain building occurred during the same period in Svalbard, Novaya Zemlya, the northern Urals, the Taymyr Peninsula, and Severnaya Zemlya. There is considerable speculation…

…during several phases of the Caledonian orogeny (mountain-building episode) between Late Silurian and Late Devonian times (about 423 million to 359 million years ago). The deformation resulted in folding, westward thrusting, and development of angular unconformities beneath and within Devonian sedimentary rocks and was accompanied by the intrusion of Silurian…