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Three decades of geochronologic studies in the New England Appalachians

Geological Society of America Bulletin

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Abstract

Over the past 30 years, both isotope geochronology and plate tectonics grew from infancy into authoritative disciplines in the geological sciences. The existing geochronlogy is summarized into a map and table emphasizing the temporal construction of the New England Appalachians. By using lithotectonic zones as the building blocks of the orogen, seven such zones are defined in terms of pre-, syn-, and post-assembly geologic history. The boundaries between these zones are faults in most cases, some of which may have had recurring movement to further complicate any plate-tectonic scenario. A delineation of underlying Grenvillian, Chain Lakes, and Avalonian basement is also attempted, which now can make use of isotopes in igneous rocks as petrogenic indicators to supplement the rare occurrences of basement outcrop within mobile zones of the orogen. -from Author

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Three decades of geochronologic studies in the New England Appalachians
Series title:
Geological Society of America Bulletin
Volume
100
Issue:
8
Year Published:
1988
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Geological Society of America Bulletin
First page:
1168
Last page:
1180