EESA06H3 Chapter Notes - Chapter 20: Taconic Orogeny, Acadian Orogeny, Acasta Gneiss
28 Feb 2015
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Canada: a young nation but an old country. Canada has been in existence since 1867. All the provinces were brought together and connected by a transcontinental railway. North american continent was assembled by plate tectonic processes that brought together many smaller land masses over a time period of 4 billion years. Construction of north america began at least 4000 million years ago with the formation of the. Acasta gneiss of the north west territories, which now forms part of the slave province of the. The northern part of canada is underlain by the exposed part of the ancient core or craton of. The exposed part is called the canadian shield (composed of archean and. The craton is composed of a complex assemblage of several distinct geological provinces. Geologic provinces are broad regions of similar rocks, usually covering many thousands of square kilometers, with characteristics that differ significantly from rock types present in adjacent areas.
