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Book Chapter

Middle Paleozoic Rocks

January 01, 1995


Middle Paleozoic belts are recognized across the Canadian Appalachian region from Quebec to Nova Scotia, and across the island of Newfoundland. Middle Paleozoic rocks are most extensive along the Quebec-Nova Scotia transect and from northwest to southeast they define the Gaspé, Fredericton, Mascarene, Arisaig, Cape Breton, and Annapolis belts. Middle Paleozoic rocks are less abundant in Newfoundland. From west to east they define the Clam Bank, Springdale, Cape Ray, Badger, Botwood, La Poile, and Fortune belts (Map 2).

Rocks of the middle Paleozoic belts do not express the early Paleozoic zonation of the orogen, except in a few cases where middle Paleozoic rocks occur within the confines of a particular zone.

The middle Paleozoic belts are less continuous than early Paleozoic zones and there have been few attempts to correlate middle Paleozoic rocks and interpret their significance for the entire Canadian Appalachian region. This is because (a) there are few complete sections with fossiliferous rocks so that the record is fragmentary, (b) occurrences in some places are small and of unknown age, thus precluding broad correlations and linkages across the orogen, (c) there are no middle Paleozoic ophiolite suites, few mélanges, and other rocks that can be related to píate boundaries, (d) contrasts among middle Paleozoic faunas are less pronounced than those among early Paleozoic faunas, and (e) many middle Paleozoic rocks are terrestrial redbeds and associated volcanic rocks that are post accretionary cover sequences, some of which overstep the early Paleozoic elements of the orogen.

Stratigraphic sections of most

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DNAG, Geology of North America

Geology of the Appalachian-Caledonian Orogen in Canada and Greenland

Harold Williams
Harold Williams
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Geological Society of America
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Publication date:
January 01, 1995




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