The tectonic events began with the Penobscottian orogeny in the Cambrian Period that affected northwestern to north-central Maine.
Granitoids are abundant in the Iberian Massif, and result from melting of the continental crust thickened during the Variscan orogeny .
Around Britain a series of deep seismic traverses has revealed many of the structures produced during the Caledonian orogeny and other earth movements that are continued out over the continental shelf.
present rates of denudation and orogeny
Together with the Appalachian, Caledonian and Variscan orogens, the Uralian orogeny contributed to the assembly of the late Palaeozoic supercontinent of Pangaea.
The Dalradian rocks in Arran were initially folded during the Caledonian orogeny into a recumbent structure known as the Aberfoyle synform.
During Variscan orogenesis further deformation and magmatism affected the North Armorican Massif.
The Uralide orogen differs from other Palaeozoic orogenic belts in that it has a crustal root, which appears to be absent in the Caledonide, Variscide and Appalachian orogens.
In north-west Scotland, for example, the lithosphere thickened during Caledonian orogenesis began to collapse under the influence of gravity from Early Devonian times.
Two main phases of orogenic activity are recognized: preAndean orogenesis and Andean orogenesis .