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Science 7 May 1971:
Vol. 172. no. 3983, pp. 558 - 560
DOI: 10.1126/science.172.3983.558
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Articles

Acadian Orogeny: An Abrupt and Brief Event

Richard S. Naylor 1

1 Earth and Planetary Sciences Department, Massachusetts Institute of Technology, Cambridge 02139

Rubidium-strontium dating indicates the Barre-type granites in eastern Vermont were emplaced at least 380 x 106 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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