Ages of intrusion and metamorphism in The Northern Appalachians

Basic Information
Author: Henry Faul, T. W. Stern, H. H. Thomas and P. L. D. Elmore
Description:A series of K-Ar, Rb-Sr, and Pb/alpha age measurements in Maine, New Hampshire, and Vermont indicates a complex history of intrusion and metamorphism. Evidence of Grenville age (about 1000 million years ago) is preserved in southwestern Vermont, and subsequent major events in Devonian (400 to 350 million years ago), Permian (270 to 230 million years ago), and Jurassic time (180 to 130? million years ago) are observed. The Appalachian age pattern is similar to that reported from the Ural Mountains and may indicate a tectonic time relationship between the Appalachians and the Urals.
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Author Contact Information
Distributor Contact Information
Name: Marjorie Gale
Organization Name: Vermont Agency of Natural Resources
Street: 1 National Life Dr
City: Montpelier
State: VT
Zip: 05671-2420
Phone: 802-654-5210
Geographic Extent
North Bounding Latitude: 45.01674
South Bounding Latitude: 42.727119
East Bounding Longitude: -71.465282
West Bounding Longitude: -73.437903