About 1.1 billion years ago, the oldest and most tectonically stable part of North America—called Laurentia—was rapidly heading south toward the equator. Laurentia eventually slammed into Earth's ...

In This State is a syndicated weekly column about Vermont’s innovators, people, ideas and places. Details are at http://www.maplecornermedia.com/inthisstate/. State ...

Did the final (Rigolet) phase of the Grenvillian Orogeny result from renewed convergence or post-convergent ductile flow? This question remains unresolved in part because of limited data on the timing ...

A detailed field, structural, metamorphic, and U-Pb geochronologic study of para- and orthogneisses in the Central Gneiss Belt near Pointe-au-Baril, Ontario, provides important constraints on ...

The Grenville Province records one of the most extensive Mesoproterozoic orogenic belts, marking the assembly of the supercontinent Rodinia. Spanning from ca 1.3 Ga to 0.98 Ga, this orogeny involved ...

THE Michikamau Intrusion is a mass of anorthosite and related rocks covering an area of about 900 square miles, centred at 54° 30′N. and 64°00′W. in Labrador, Newfoundland. The intrusion is one of a ...