Is Marble Extrusive

The terms intrusive and extrusive apply to igneous rocks.

Is marble extrusive.

Extrusive rocks igneous rocks which form by the crystallization of magma at the surface of the earth are called extrusive rocks. Contains many small holes. Extrusive or volcanic igneous rock is produced when magma exits and cools above or very near the earth s surface. Marble is a metamorphic rock that was originally limestone a sedimentary rock and is composed primarily of the mineral calcite.

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. They are characterized by fine grained textures because their rapid cooling at or near the surface did not provide enough time for large crystals to grow. It is composed primarily of the mineral calcite caco 3 and usually contains other minerals such as clay minerals micas quartz pyrite iron oxides and graphite under the conditions of metamorphism the calcite in the limestone recrystallizes to form a rock that is.

Extrusive rock any rock derived from magma molten silicate material that was poured out or ejected at earth s surface. As the rate of cooling increases the size of the crystals that form. The molten material then slowly solidifies below earth s surface where it may later be exposed through erosion. Marble is a metamorphic rock composed of recrystallized carbonate minerals most commonly calcite or dolomite marble is typically not foliated although there are exceptions in geology the term marble refers to metamorphosed limestone but its use in stonemasonry more broadly encompasses unmetamorphosed limestone.

As stated above extrusive rocks don t have minerals large enough to be obvious. Is composed of alternating bands of light and dark silicate minerals. Is also fine grained. Granite is an intrusive igneous rock composed mainly of feldspar.

These colors are a result of the rock being intrusive instead of extrusive. Something that has also contributed to the durable and strong nature of the rock. Apart from the colors another reason why granite isn t extrusive is the significant visible minerals. Marble is commonly used for sculpture and as a building material.