The Grenville Front Tectonic Zone is a geological feature in
Eastern Canada that separates the
Superior craton
The Superior Craton is a stable crustal block covering Quebec, Ontario, and southeast Manitoba in Canada, and northern Minnesota in the United States. It is the biggest craton among those formed during the Archean period. A craton is a large part ...
from rocks of the
Grenville orogeny. It is a large tectonic zone of the
Canadian Shield
The Canadian Shield (french: Bouclier canadien ), also called the Laurentian Plateau, is a geologic shield, a large area of exposed Precambrian igneous and high-grade metamorphic rocks. It forms the North American Craton (or Laurentia), the anc ...
, extending from the northern shore of
Lake Huron
Lake Huron ( ) is one of the five Great Lakes of North America. Hydrology, Hydrologically, it comprises the easterly portion of Lake Michigan–Huron, having the same surface elevation as Lake Michigan, to which it is connected by the , Strait ...
through
Ontario and
Quebec to
Labrador, a distance of about .
The Grenville front tectonic zone: Results from the 1986 Great Lakes onshore seismic wide-angle reflection and refraction experiment
/ref>
References
Geology of Ontario
Geology of Quebec
Geology of Newfoundland and Labrador
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