Canadian Journal of Earth Sciences · 1974 · 20 citations · 7 references
Historical GeographyEngineeringGeomorphologyPrecambrian GeologyAmerican ArchaeologyArchaeologyPhysical GeographyGeologic Time ScaleEarth ScienceSocial SciencesRegional GeologyEarly Devonian AgePast GeographyAcadian DeformationQuaternary ResearchGeochronologyIntegrated StratigraphyGeographySt. George PlutonSouthwestern New BrunswickGeologyTectonicsStructural GeologyHistory Of GeologyQuaternary Tectonic DeformationQuaternary Period
Deformed strata of early Devonian age in southwestern New Brunswick and adjacent Maine are intruded by die post-orogenic St. George pluton and similar intrusions in Maine. A Rb-Sr whole-rock isochron age of 394 ± 20 m.y. obtained from the St. George pluton defines an Early Devonian age for the pluton. The age of this post-orogenic intrusive event is supported by other radiometric dates. Therefore, the Acadian deformation in this area occurred in Early Devonian time.
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