Appalachian orogeny

Appalachian orogeny

[¦ap·ə¦lā·chən ȯ′räj·ə·nē]
(geology)
An obsolete term referring to Late Paleozoic diastrophism beginning perhaps in the Late Devonian and continuing until the end of the Permian; now replaced by Alleghenian orogeny.
References in periodicals archive ?
Appalachian orogeny. In The Appalachian-Ouachita orogeny in the United States.
These ages suggested that: 1) the massif had an Ordovician metasedimentary basal unit, dated with trilobites; 2) At the end of the Appalachian orogeny (that began 360 Ma and finished approximately 270 Ma ago), the granitoids were emplaced in the metasediments as a post orogenic event.
The Mogote Granite was intruded during the Taconic orogeny whereas the Mata Oscura and Pinero granites, as well as the Corcovado and Segoviera rhyolites, fall at the end of the Appalachian orogeny. North of the Venezuelan Guyana Shield, the basement rocks exposed on exploratory oil wells of the Barinas-Apure and Guarico sedimentary basins have been recognized as metasedimentary and granitic forming a Paleozoic belt [4].
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