Ordovician period
Taconian orogeny and Acadian orogeny
Devonian Period
Mississippian Period............by R.E
Mountains are formed by the process of orogeny.
It is the Appalachian Mountians. Which consist of: Taconic Orogeny (Ordovician);Acadian Orogeny (Devonian);Caledonian Orogeny (Silurian); Allegheny Orogeny (Pennsylvanian & Permian).
orogeny come from the Greek oros meaning 'mountain'
The plural of orogeny is orogenies. It refers to the process of mountain building through tectonic plate movement.
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An Orogeny
Orogeny is the process of mountain building through tectonic plate movement, collision, and deformation of the Earth's crust. It involves the folding, faulting, and uplifting of rocks to form mountain ranges.
Vulcanism and Orogeny
Jan Kalvoda has written: 'Geomorphological record of the Quaternary orogeny in the Himalaya and the Karakoram' -- subject(s): Geomorphology, Orogeny, Stratigraphic Geology