During the middle and late Paleozoic, about a third of the Rodinian mass was torn apart and moved to equatorial regions. Most of these blocks were assembled by a series of plate collisions into the super continents of Laurussia [the Old Red continent] by the Devonian and Laurasia by the Pennsylvanian. Meanwhile the remains of Rodinia, Gondwana, rotated clockwise and moved northward to collide with Laurasia -- the result was the super continent Pangaea [all land]. Pangaea was shaped like a huge "pack man", mouth agape and facing eastward across the equator. The large,open mouth was the Tethys Ocean.
The Antler arc collides with western North America creating the Antler orogeny. Gondwana, with a large, developing glacier, nears southern Laurussia.
Tectonics, Sedimentation, Paleogeography of North Atlantic Region
1st Order Global Tectonic Features
Link to other time periods