Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 27. Chapters: Lake Superior, Temagami greenstone belt, Circum-Superior Belt, Ottawa-Bonnechere Graben, MidcontinentMorePlease note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 27. Chapters: Lake Superior, Temagami greenstone belt, Circum-Superior Belt, Ottawa-Bonnechere Graben, Midcontinent Rift System, Lake Nipigon, Kanichee Mine, Nipissing sills, Kidd Mine, Mackenzie dike swarm, New England hotspot, NorWester Mountains, Mount McKay, Copperfields Mine, Lac des les igneous complex, Great Meteor hotspot track, Marathon Large Igneous Province, Ungava magmatic event, Iceland Lake Pluton, Abitibi greenstone belt, Matachewan dike swarm, Grenville dike swarm, Spawning Lake Stock, Chambers-Strathy Batholith, Kanichee layered intrusive complex, Red Lake greenstone belt, Matachewan hotspot, Sudbury dike swarm, Mamainse Point Formation, Swayze greenstone belt.
Excerpt: The Temagami greenstone belt, also known as the Temagami volcanic belt and the Temagami metavolcanic belt, is a small 2.7 billion year old greenstone belt in the Temagami region of Northeastern Ontario, Canada. It represents a feature of the Superior craton, an ancient and stable part of the Earths lithosphere that forms the core of the North American continent and Canadian Shield.
The belt is composed of metamorphosed volcanic rocks that range in composition from basalt to rhyolite. These form the east-northeast trend of the belt and are overlain by metamorphosed sedimentary rocks. They were created during several volcanic episodes involving a variety of eruptive styles ranging from passive lava eruptions to viscous explosive eruptions. Part of the Canadian Shield, the Temagami greenstone belt contains some of the oldest known rocks on Earth.
The belt is made up of a number of geologic features such as batholiths, stocks, dikes, volcanic complexes, layered intrusions and deformation zones. These are situated in several geographical townships in the municipality of Temagami, including Chambers, Strathy, Strathcona, Briggs and possibly Best. Geo...