A metamorphic rock that's formed from shale is slate. Slate is a low-grade rock that's used as a building material. It is often used for roofing tile because of the ease with which it can be split into thin sheets. If slate is installed properly, it's also waterproof.Continue Reading
Slate is created when shale is compressed under moderately high temperatures. This compression can be due to the movement of the earth in a process called dynamic metamorphism. The pressure causes water to be squeezed out of the rock and the tiny clay mineral or mica grains in the shale to line up at right angles to the direction of the pressure. The pressure can also cause the resulting slate to be foliated. This means its materials are arranged in parallel bands.
Slate is often a gray rock with a matte luster and a very fine grain. It can also be green, black or purple. Slate quarries are found in Cornwall and the Lake District in England as well as Italy, Portugal, Brazil, Vermont and New York state. Slate was traditionally used for blackboards as well as roofing tiles.
Fossils are often found in slate. However, sometimes the formation of cleavage, or the plane through which the rock naturally breaks, deforms the rock to the point where any fossils are destroyed.Learn more about Earth Science
Marble is a metamorphic rock formed from limestone. Changes in the limestone's chemical properties due to external forces can result in the creation of marble.Full Answer >
Granite is an igneous rock, not a metamorphic rock. It is the most predominant type of igneous rock on the surface of the earth.Full Answer >
Fossils can be found in metamorphic rock. However, fossils are rarely found in metamorphic rock and are typically partial or badly damaged from the rock formation process.Full Answer >
The soft, metamorphic rock composed of talc is called soapstone, or steatite. Soapstone gets its name from its greasy or soapy feel. It can be blue, gray, green or brown.Full Answer >