Deducing the scale of tsunamis from the ’roundness’ of deposited gravel

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Scientists have found a link between the ’roundness’ distribution of tsunami deposits and how far tsunamis reach inland. They sampled the ’roundness’ of gravel from different tsunamis in Koyadori, Japan, and found a common, abrupt change in composition approximately 40% of the ‘inundation distance’ from the shoreline, regardless of tsunami magnitude. Estimates of ancient tsunami size from geological deposits may help inform effective disaster mitigation.

This full article appears on <a href="https://www.sciencedaily.com/releases/2019/08/190825075934.htm">Science Daily</a>

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