40Ar/39Ar ages from the Narragansett Basin and southern Rhode Island basement terrane: their bearing on the extent and timing of Alleghenian
tectonothermal events in New England.
2006) and by a Paleozoic gneiss that is related either to the Taconic orogeny or the Alleghenian
orogeny (Cardona et al.
reconstructions and subsequent evolution of the Gulf of Mexico, Bahamas, and proto-Caribbean.
1998; Waldron and van Staal, 2001 and references therein), whereas the Alleghenian
orogeny was due to continent collision during final closure of the Rheic Ocean.
During the Pennsylvanian Period (320-286 Ma), the collision of North America and Africa resulted in the Alleghenian
Orogeny and final assemblage of Pangaea.
The terrane is polydeformed by Acadian and Alleghenian
tectonic pulses, presenting the full gamut of geologic mapping problems that must be addressed by GIS software.
reactivation of the Acadian fold belt, Meguma zone, southwest Nova Scotia.