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The Slab volcanics are a late Paleoproterozoic volcanic succession in the Wernecke Mountains of Yukon Territory in northwestern Canada. Fragments of the succession are preserved as megaclasts in km-scale zones of hydrothermal breccia. The largest clast is 160×380m and consists of 31 mafic lava flows and minor intercalated sandstone and tephra. Hydrothermal activity during the brecciation led to extensive...
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