The Taconic unconformity is a major unconformity created during the Taconic orogeny, exposed from eastern New York State to the Gaspe peninsula.Skidmore, W. B. "The Taconic unconformity in the Gaspe Peninsula and neighbouring regions." Royal Society of Canada, Special Publication 10 (1967). The orogeny was a long one that comprised multiple bursts; it primarily dated to the end of the Ordovician, and the underlying rocks are primarily this age. It is overlain by Silurian and Devonian metasediments.
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