Waste sludge from lava 850.Lava from eruptions flowing into the sea on the floor, um, tuen or flow from land into the sea may cool down rapidly until you explode into tiny pieces of debris, stones of sediments (littoral explosion or steam explosion), the result is that the resulting scrap pieces of volcanic rock, sludge and sand grain size on a large number of basalt that contains an element of high iron ore and mineral silica low. When the decay of the ruins, there was still a heavy black mineral make coastal waves blowing silt removal took lighter than it dumped only black sand with a weight greater than. The famous beach of black sand of Hawaii Punaluu black sand beach, for example, that happens dynamically by the interaction between intense hot lava with sea water.Black sand beach on the island's West side, North of New Zealand domestic property attract to magnets. These depressions caused by the decay of stone ruins volcano Taranaki and Taupo area bars and drift with the river down to the beach and the sea accumulated seabed. These sand contains iron ore (Hematite and magnetite) titanium and medium city These sands are considered to be elements of iron ore up to 20-25% of iron ore by the water main, which is part of a group of titanomagnetite ore sapi nail composed of magnetite (Fe3O4), and ulvospinel (Fe2TiO4) [1] [2] [3]The black sand on the beach, a small city on the West Coast, Westpoint of South Island in New Zealand, mineral-rich country's mega night (FeTiO3 ilmenite titanium – iron oxide:), which was taken by a fan of the river and rolled like a beach. But the quantity of ore IL mega night on the beach, and a higher taphak will not be cost-effective in mining to extract the elements titanium [4]However, black sand beach Boracay, in the province of Cagayan on Luzon island of the Philippines as black sand with magnetite ore loan to South Korea, which has 70% of the people to continue to dig South Korea return lap result lap black sand make sea water to farming areas to create trouble, until the people in the region who has a dispute [5]
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