Why does Hawaii have runny lava?

Mafic magmas like those in Hawaii tend to form when the heavier crust that forms the ocean floor melts. They contain between 47 to 63 percent silica, the mineral that makes up glass and quartz. As far as molten rocks go, mafic magmas are fairly runny, with viscosities ranging from molasses to peanut butter.



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Rising gradually to more than 4 km (2.5 mi) above sea level, Hawaii's Mauna Loa is the largest active volcano on our planet. Its submarine flanks descend to the sea floor an additional 5 km (3 mi), and the sea floor in turn is depressed by Mauna Loa's great mass another 8 km (5 mi).

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We know Kauai will most likely disappear completely in 1-1.5 million years, Oahu will take place as the oldest Hawaiian island, Maui will continue to reshape its landscape (with Haleakala giving it's last show of bursting lava before losing its connection to the hot spot) and Big Island volcanoes will eventually finish ...

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Hawaii National Park, Hawai'i - Visitors may hike and bicycle along the gravel emergency access route at the end of Chain of Craters Road to view and access lava as it flows down the Pulama Pali and spreads out onto the coastal lava plain in the national park, and towards the ocean.

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Two years later, Kilauea erupted between December 2020 and May 2021 again within Halema?uma?u crater, boiling off a water lake that had been growing for more than a year, and replacing it with a lava lake 229 m (751 ft) deep.

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