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“And then, when the tsunami spreads inland, it carries sand with it into these peat bogs, and so you get this sort of peat-sand-peat sandwich.” By using radiocarbon dating and further analysis of these sand layers, the geologists were able to conclude that the sand came from oceanic sources and determined the approximate times when the tsunamis inundated the islands.
Afterall, most of the The Big Island’s coastline is black volcanic rock.
Many turtles live in this partially enclosed area because they are safe from predators.
Plus, the algae they love to eat plentifully grows on the rocks.
In a November 2018 paper — titled, “Evidence for frequent, large tsunamis spanning locked and creeping parts of the Aleutian megathrust” — nine USGS research geologists conducted studies of a pair of coastal areas in the Aleutian Islands off the coast of Alaska and discovered that the beaches had been inundated by the ocean several times in the past, likely by tsunamis.
Geological Survey suggests that tsunamis like the one that devastated Hilo in 1946 might be predictable — and more frequent than previously believed.
Yet on the Island of Hawaii, you get to personally witness forces of nature as land is created daily from constant lava flow.