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Papakolea Green Sand Beach – An Idyllic, Isolated Geological Rarity

Fifty thousands years ago, flowing underground magma from Hawai’i Island’s second most important volcano – Mauna Loa – collided with groundwater, causing an violent explosion of volcanic ash and creating what is known among today’s volcanologists as a “tuff ring”. This was a massive mound of mineral rich ash and other volcanic products which grew …

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