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Lava appears orange when it is molten and at high temperatures, typically between 1,300 to 2,200 degrees Fahrenheit (700 to 1,200 degrees Celsius). The orange color is due to the thermal radiation emitted by the hot molten rock. As lava cools, it solidifies and can take on a black appearance, primarily due to the formation of basalt, which is rich in iron and magnesium. This transition occurs as the lava loses heat and crystallizes, resulting in the dark, solid rock typical of many volcanic landscapes.

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4d ago

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