![]() ![]() Ash has been found east to Saskatchewan, south to Nevada, north to central British Columbia and on the Pacific Ocean floor 3-6. There is something hidden in the forest and it takes anything that comes near it.TEPHRA falls from Mount Mazama 1,2, on the site of the present Crater Lake caldera in Oregon, form the most extensive Holocene marker horizon in the Pacific North-west of the US and the adjacent part of Canada.
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