Acadian orogeny

The Acadian orogeny in the upper ( = late ) Devon into middle Carboniferous - about 360 mya to 320 mya - is the middle phase in the era of the Caledonian orogeny. In the geological sciences, this term is also used for the whole Acadian Gebirgsbildungsära.

Previous Taconic orogeny was the, the subsequent phase was the Alleghenische orogeny.

The Acadian orogeny is a deformation of earlier orogens, such as the Taconic Mountains, on the consolidated continent Laurussia - " just" before the union with Gondwana to the global supercontinent Pangaea - and is reflected in the stratification of the northern Appalachians between New York and Newfoundland and Canada's Gaspe Peninsula in the form of igneous and metamorphic rocks.

The Variscan orogeny in Europe, in particular the Breton phase - due to the collision of the eastern parts Laurussias with Armorica - happened just at the same time and due to the non-existence of the Atlantic also in close proximity, such as in Nevada the Antler Orogen in archaic Great Basin aloft grew, metamorphic events were taking place in Texas and Mexico, and Arkansas were formed the Ouachita Mountains.

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