"geologic mapping and dating of volcanic deposits at kilauea form the basis for an astonishing statistic -- over 90 percent of the land surface of kilauea has been covered by lava since the time of arrival of the hawaiians, about 1,500 years ago. had the developer been made aware of the entire history of kilauea's activity, the risk of developing the east rift zone would have been understood to be higher than could be inferred from just considering the record of the preceding 111 years."
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