The northern Appalachian orogen
widens dramatically to the north from the deep-crustal, high-grade metamorphic region of southern New England to shallow crustal low-grade rocks in eastern Maine and New Brunswick (Fig.
Anatomy of an early palaeozoic subduction complex in the central Appalachian orogen
, Sedimentary Geology,51, 75-95.Lash, G.G., 1987.
Neale, W.R.W., 1972, A cross section through the Appalachian orogen
in Newfoundland, Excursion A62-C62: XXIV International Geological Congress, Montreal, Canada, 84 p.
Additionally, the new age constraints provided by our U-Pb work allow us to make connections with other alkaline igneous rocks of broadly similar age in the northern Appalachian orogen
and place constraints on the tectonic setting of the region at the time of intrusion.
In North America, these terranes (Avalonia, Ganderia) are incorporated into the Appalachian Orogen
and accreted to Laurentia prior to the amalgamation of Pangaea.
The Salinic, Acadian, and orogenies dominated these events affecting the entire width of the Appalachian orogen
from the most outboard terrane (Meguma) to the Laurentian foreland with the accretion of the Meguma terrane (Fig.
and Bird, J.M., 1969, Lithosphere plate-continental margin tectonics and the evolution of the Appalachian orogen
: Bulletin of the Geological Society of America, v.
The spring meeting (Feb 19-21st, 2007) will feature a symposium to mark the 30th anniversary of the ground-breaking "Tectonic-lithofacies map of the Appalachian Orogen
", first developed by Dr.
New insights into the Appalachian orogen
from geology and geochronology along the Cape Ray fault zone, southwest Newfoundland.
Granite batholiths form a large part of tectonic terranes (e.g., Cordillera of North and South America, Appalachian Orogen
) and, therefore, constitute an important part of their geological history.
Many events affected the Appalachian orogen
in the 60 Ma following the orogenic climax, including granitoid magmatism, strike-slip faulting, basin development and opening of the Atlantic Ocean.
Hence, post-Acadian faults in the Gaspe Peninsula may be local expressions of a regional stress regime that may have affected much of the Canadian Appalachian orogen