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The Acasta Gneiss: The Earth’s Oldest Rock
The Acasta Gneiss originated 4.2 billion years ago as a granite that later metamorphosed and partially melted into a gneiss, a coarse-grained rock composed mainly of feldspar, quartz and mica. The oldest known exposed rock in the world, it is highly rare and limited in supply. Located on an island about 300 kilometres north of Yellowknife, Northwest Territories, the Acasta Gneiss is important in establishing the early history of the Earth’s continental crust.
United Nations Monument
The United Nations has built over 2,000 peace monuments around the world in order to commemorate events in a physical and permanent way.
In 2013, the Italian city of Veroli, located 99 kilometres southeast of Rome, invited UN member states to donate a mineral sample for a new monument that will illustrate the values of peace and brotherhood. The monument’s design includes a circular piece of rock containing the mineral contributions and placed atop a pillar. The circle represents inclusiveness, the pillar stability, and the collective minerals brotherhood among nations.
Natural Resources Canada
Natural Resources Canada maps rock formations and their mineral deposits to document and compile the basic geoscience data of the country. This information supports numerous activities: informed land-use decisions, the sustainable development of resources, environmental protection and geoscience-related technology innovation. An established leader with strong ties to academia and the private sector, the department is the Government of Canada’s central agency responsible for science and technology in the fields of energy, forests, and minerals and metals, and its expertise in earth sciences is used to build and maintain an up-to-date knowledge base of Canada’s land mass.
This important work is part of the Government of Canada’s strategy to enhance the responsible development and use of Canada’s natural resources and the competitiveness of Canada’s natural resources products.
Office of Canada’s Minister of Natural Resources
Natural Resources Canada
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