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Natural Resources Canada > Earth Sciences Sector > Priorities > Strong and safe communities > Volcanoes of Canada
Volcanoes of Canada
Distribution of tephra deposits in Western North America

Note: requires the Flash 5 Plug-in.

Figure 8. Distribution of tephra deposits

Approximate distribution of Holocene (0-10,000 years) ash deposits in western North America. Also shown is the enormous airfall ash deposit produced by Long Valley caldera (California), one of the largest volume eruptions in North America in the last million years.

2006-04-13Important notices