FORESTRY
SOIL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Igneous Rock
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Metamorphic Rock
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Sedimentary Rock
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None of the above
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Detailed explanation-1: -These are the rocks that form at erupting volcanoes and oozing fissures. The magma, called lava when molten rock erupts on the surface, cools and solidifies almost instantly when it is exposed to the relatively cool temperature of the atmosphere.
Detailed explanation-2: -Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust.
Detailed explanation-3: -Aplite-A light-colored, fine-grained intrusive igneous rock with sugary texture emplaced at relatively shallow depths beneath Earth’s surface, consisting mostly of feldspar and quartz. Obsidian-Black or dark-colored volcanic glass, usually of rhyolite composition.
Detailed explanation-4: -Metamorphic rock can change into igneous or sedimentary rock. Igneous rock forms when magma cools and makes crystals. Magma is a hot liquid made of melted minerals. The minerals can form crystals when they cool.
Detailed explanation-5: -Aphanitic: fine-grained, less than 1 mm, grains not seen with the unaided eye. Phaneritic: “coarse-grained”; visible crystals; 1 to 10 mm. Pegmatitic: “very coarse-grained”; > 1 cm. More items •27-Oct-2020