Classify following rocks : Marble ,pumice,slate,limestone
Answers
Marble
When limestone, a sedimentary rock, gets buried deep in the earth for millions of years, the heat and pressure can change it into a metamorphic rock called marble. Marble is strong and can be polished to a beautiful luster. It is widely used for buildings and statues. As you can see from the picture, marble has a very sparkly luster. It occurs in many different colors such as white, pink, gray, red, yellow or black
Slate
Slate is a metamorphic rock that is formed when shales and clays are put under great pressure and heated inside the earth for millions of years. Like shale, it splits apart into sheets, which means that it has good cleavage. Slate is usually gray or black and is used to make blackboards and roofing tiles.
Limestone
Limestone is a sedimentary rock. It is formed by layers of small pieces of rock and stones pressed hard together. The stone forms in wet areas which mean it will also contain of shells and waste matter from organisms that live in water.Limestone caves are formed when rainwater seeps through cracks in limestone rock and dissolves it. Limestone turns into the metamorphic rock marble when it is subjected to high amounts of pressure and heat.
Pumice
Pumice is an extrusive igneous rock formed as a result of volcanic eruptions. Extrusive means that it forms outside of the volcano (as opposed to inside the volcano in the magma chamber), and as a result, the magma cools quickly after exiting the volcano. Little pockets of air can be seen in them. This rock is so light, that many pumice rocks will actually float in water. Pumice is actually a kind of glass and not a mixture of minerals.
Answer:
IGNEOUS ROCK:GRANITE, BASALT, PUMICE, DOLERITE !
SEDIMENTARY ROCK:SANDSTONE, LIMESTONE !
METAMORPHIC ROCK:MARBLE, SLATE, GNEISS, COAL !
Explanation:
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