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Sodalite from near Bancroft. The quarry is located four kilometres east of Bancroft, Ontario [1] on Ontario Highway 28. [8] It is on rock with calcite vein-dikes that intruded into nepheline gneiss rock, with nepheline prismatic crystals attached to the walls of the dikes.
The geology of Ontario is the study of rock formations in the most populated province in Canada- it is home to some of the oldest rock on Earth. The geology in Ontario consists of ancient Precambrian igneous and metamorphic rock which sits under younger, sedimentary rocks and soils. Around 61% of Ontario is covered by the Canadian Shield. The ...
The Ring of Fire is a vast, mineral-rich region located in the remote James Bay Lowlands of Northern Ontario, Canada.Spanning approximately 5,000 square kilometres (1,900 sq mi), the area is rich in chromite, nickel, copper, platinum group elements, gold, zinc, and other valuable minerals.
With an estimated age of 1.88 billion years, the La Cloche Mountains consist of metamorphosed quartz sandstone, which accumulated and was deposited in the Georgian Bay region of Ontario 2.5 billion years ago. [2] The mountains themselves were formed during the Penokean Orogeny, a mountain-building stage in the Canadian Shield's geological ...
The Kimberley diamonds were originally found in weathered kimberlite, which was colored yellow by limonite, and so was called "yellow ground". Deeper workings encountered less altered rock, serpentinized kimberlite, which miners call "blue ground". Yellow ground kimberlite is easy to break apart and was the first source of diamonds to be mined.
2, with royal blue varieties widely used as an ornamental gemstone. Although massive sodalite samples are opaque, crystals are usually transparent to translucent. Sodalite is a member of the sodalite group with hauyne, nosean, lazurite and tugtupite. The people of the Caral culture traded for sodalite from the Collao altiplano. [6]
The tree species is found throughout Ontario. It is the tallest tree in the province and can live over 250 years. Known as "the Tree of Great Peace" by the Haudenosaunee First Nations of Southern Ontario. The eastern white pine was also an important source of income and trade during the province's early days. [2]
There are many mining towns extracting these minerals. The largest, and one of the best known, is Sudbury, Ontario. Sudbury is an exception to the normal process of forming minerals in the shield since the Sudbury Basin is an ancient meteorite impact crater. Ejecta from the meteorite impact was found in the Rove Formation in May 2007.