The Alleghanian orogeny or Appalachian orogeny is one of the geological mountain-forming events that formed the Appalachian Mountains and Allegheny Mountains...

collision of North America and Africa (see Alleghanian orogeny). The third mountain-building event was the Acadian orogeny which occurred between 375 and 359...

lasted for 10 million years. The Acadian orogeny began 375 Ma and lasted 50 million years. The Alleghanian orogeny began 325 Ma and lasted 65 million years...

of Euramerica and northern Gondwana as part of the Variscan and Alleghanian orogenies, which began during the Carboniferous approximately 340 million...

Variscan-Alleghanian-Ouachita orogeny. Today their remains stretch over 10,000 km from the Gulf of Mexico in the west to Turkey in the east. The orogeny was...

Taconic orogeny – Mountain-building period that affected most of New England Acadian orogeny – North American orogeny Alleghanian orogeny – Mountain-forming...

unknown, but could have occurred during the Taconic, Acadian, or Alleghanian Orogenies. The terrane comprises Neoproterozoic to Early Cambrian meta-sedimentary...

Antler Orogeny in the Western Cordillera. During the Carboniferous and Permian, Laurussia fused with Gondwana to form Pangaea. The resulting Alleghanian orogeny...

metamorphism and deformation occurred during the Alleghanian orogeny. During the latest part of this orogeny, this segment of the Appalachian Mountains was...

substantial folding associated with its landlocked position during the Alleghanian orogeny mountain building event. The region accumulated sedimentary rocks...