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Sagot :
The orogenic events and the geologic epochs they are related with are as follows: a) Grenville: Precambrian, b) Taconian: Cambrian, c) Acadian: Precambrian, and d) Alleghenian: Silurian.
The bottom rocks in Virginia were constructed by the Grenville Event, or events, since the mountains may have been built by many continental collisions. As a result of the impacts' intense heat and pressure, rocks melted to form granite and gneiss.
The Taconic orogeny, which was once thought to be a single occurrence, really consists of at least three occurrences. The first occurred close to Maine and Newfoundland during the Early Ordovician Epoch. The Middle Ordovician Epoch's second was focused in eastern Tennessee.
During the Devonian Period, a region stretching from modern-day New York through Newfoundland saw the Acadian orogeny, a mountain-building event.
In the late Paleozoic period, the central & southern Appalachian geological margin of North America collided with that of North Africa, causing the Alleghenian orogeny.
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The question is -
Match the orogenic episodes (periods of mountain building) with their associated period of geologic time.
Group of answer choices
a) Grenville :
b) Taconian :
c) Acadian :
d) Alleghenian :
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