In the stratigraphic cross-section through the central Appalachian Mountains, the three tectonic cycles of deposition (called I, II, and III, where I is the oldest) are related to these Appalachian orogenies, respectively:

Question

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The Taconic orogeny (Ordovician) corresponds to the first tectonic cycle (Cycle I) and is the oldest of the three. The Acadian orogeny (Devonian) corresponds to the second tectonic cycle (Cycle II). The Alleghenian orogeny (Carboniferous) corresponds to the third tectonic cycle (Cycle III) and is the youngest of the three. Therefore, the correct answer is A) Taconic, Acadian, and Alleghenian.

In the Stratigraphic Cross-Section Through the Central Appalachian Mountains, the Three