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Acadian Orogeny: An Abrupt and Brief Event

Richard S. Naylor
Science
New Series, Vol. 172, No. 3983 (May 7, 1971), pp. 558-560
Stable URL: http://www.jstor.org/stable/1732547
Page Count: 3
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Acadian Orogeny: An Abrupt and Brief Event
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Abstract

Rubidium-strontium dating indicates the Barre-type granites in eastern Vermont were emplaced at least 380 × 10$^{6}$ years ago. This result suggests the Acadian orogeny was more abrupt than previously suspected, and is consistent with the hypothesis that the orogeny involves a collision between two sialic plates.

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