Geological Society of America (GSA) Northeastern Section 50-th Annual Meeting

Start Date: 
Monday, March 23, 2015
End Date: 
Wednesday, March 25, 2015

Location: Bretton Woods, New Hampshire, USA


Includes the following sessions:

T4. Ages and origins of intrusive rocks in the New England Appalachians

Convenors: Dyk Eusden (, Dwight Bradley (

The New England Appalachians are host to intrusive rocks that range in age from Mesoproterozoic to Cretaceous. Recent advances in geochronology, geochemistry, and petrogenesis have shed new light on the origins of these igneous suites, which number at least a dozen. In addition, the list of possible triggers for magma genesis has grown to include not only subduction, crustal thickening, lithospheric extension, and mantle plume activity, but also orogenic collapse, lower-lithosphere foundering or detachment, ridge subduction, and slab breakoff.

Bretton Woods, New Hampshire, USA