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Basalt - Wikipedia, the free encyclopedia
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News results for BASALT
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Basalt, Colorado is a quaint mountain community located at the confluence of two Gold medal trout streams, the Fryingpan and the Roaring Fork Rivers. ... Rich in history, Basalt maintains a small town feel while offering a wide variety of restaurants and unique shopping.
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Basalt is one of the major igneous rock types. ... Basalt is an extrusive or intrusive rock that makes up most of the world's oceanic crust. This specimen was erupted from Kilauea volcano in 1960. (more below)
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Basalt and granite actually have quite a bit in common. Both are igneous rocks, which means that they cooled from a magma (the earth gets very hot just below the surface, and there is lots of liquid rock available).
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Basalt is an extrusive igneous rock that is very dark in color. It is the most common type of rock in the Earth's crust and it makes up most of the ocean floor. ... Basalt forms when lava reaches the Earth's surface at a volcano or mid ocean ridge. The lava is between 1100 to 1250° C when it gets to the surface.
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Basalt is the most common igneous rock. It is dark brown or black, and directly results from cooled flowing magma. One variety of basalt is scoria, which has bubble-like cavities where minerals develop. Some minerals that are associated with basalt are feldspars and olivine.
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Basalt is the most abundant of the Earth's volcanic rocks. Basalt magma is believed to be formed by partial melting of mantle rocks near the base of the crust (tholeiites) and deeper in the mantle (olivine basalts).Most basalts occur in Lava flows and sheets;
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If olivine is present the rock is called olivine basalt. Microscopic examination show the groundmass to consist of plagioclase (usually labradorite), pyroxene, olivine and magnetite, with a wide range of accessory minerals.
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