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The Canadian Shield is a collage of Archean plates and accreted juvenile arc terranes and sedimentary basins of the Proterozoic Eon that were progressively amalgamated during the interval 2.45–1.24 Ga, with the most substantial growth period occurring during the Trans-Hudson orogeny, between c. 1.90–1.80 Ga. [5] The Canadian Shield was the ...
Baltic Shield, part of the East European Craton; Fennoscandian Shield, the exposed Northwestern part of the Baltic Shield in Norway, Sweden and Finland (3.1 Ga) Karelian Craton, part of the Fennoscandian Shield in Southeast Finland and Karelia Russia, (3.4 Ga) Kola Craton, part of the Fennoscandian Shield, Kola Peninsula, Northwest Russia
The earliest part of the shield is metamorphosed Archean rocks, originally volcanic in origin. Numerous terranes were accreted onto this Archean core during the Proterozoic to form the Canadian Shield. [4] The southern Archean province is the Superior Craton, it is formed by the combination of a greenstone-granite and a gneiss terrane. [5]
The rocks of the Laurentian Mountains contain deformation and metamorphic structures that show long periods of tectonic activity occurred. The Grenville Province is a subdivision of the Canadian Shield, and in this area, the oldest rocks of this geologic region are found. These rocks represent a chain of mountains that formed between 1,500 and ...
As more provinces and territories joined Canada, the original four arms were marshalled with the arms of the new members of Confederation, eventually resulting in a shield with nine quarterings. [17] This occurred by way of popular and even Canadian governmental usage; flag-makers took to using the complex shield on Canadian Red Ensigns.
The basin is located on the Canadian Shield in the city of Greater Sudbury, Ontario. The former municipalities of Rayside-Balfour, Valley East and Capreol lie within the Sudbury Basin, which is referred to locally as "The Valley". The urban core of the former city of Sudbury lies on the southern outskirts of the basin.
A second railway, the Canadian Northern (CNoR), was built across the northern portion of the park, opening in 1915. Both lines later became part of Canadian National Railway. The beginning of the end of rail service in the park happened in 1933 when a flood damaged an old Ottawa, Arnprior and Parry Sound Railway trestle on Cache Lake.
Pukaskwa National Park in Ontario.. These hills support a large area of rich taiga forest dominated by black spruce (Picea mariana) along with jack pine and some paper birch (Betula papyrifera) and in the warmer south-facing areas some trembling aspen (Populus tremuloides), white spruce (Picea glauca), Ontario balsam poplar (Populus balsamifera) and balsam fir (Abies balsamea).