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出典:Wikipedia
出典:『Wikipedia』 (2010/12/28 23:37 UTC 版)
The Coldwell Complex is a large circular gabbro and syenite intrusion within the Earth's crust. Located on the North Shore of Lake Superior in northwestern Ontario, Canada, it is the largest alkaline igneous intrusion in North America with a diameter of 25 km (16 mi).
Coldwell Complex