Posted on Jan 27, 2022
How scientists know when the last big Cascadia earthquake happened
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PO1 William "Chip" Nagel quite an interesting article, the more we understand about the past the better prepared we can be.
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American researchers used carbon dating on the spruce, peat and fossilized plants. Sitka spruce as far apart as southern Washington and Northern California died from the high waters during the same few decades — sometime between 1695 and 1720. Their rings were wide right up through the last ring, proving that a sudden event rather than slow sea level rise was the culprit.
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