The Middle Ordovician Tetagouche group is divided lithologically into four divisions: Rhyolite, Quartz-feldspar porphyry, Greenstone, and Slate. Except that members of the Slate and Greenstone divisions are scattered throughout the group, the rock divisions apparently are superposed in the above order. The porphyry is believed to be the intrusive equivalent of the rhyolite. The Greenstone division comprises greenstone, spilite, and minor ironformation. The subgreywacke-graptolitic shale-greenstone association indicates deposition in a eugeosyncline in an epineritic environment. The regional metamorphism is low grade (greenschist facies).
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.110313 |
| Date | January 1956 |
| Creators | Skinner, Ralph. |
| Contributors | Clark, T. (Supervisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Doctor of Philosophy. (Department of Earth Sciences.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: NNNNNNNNN, Theses scanned by McGill Library. |
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