Is Granite The Oldest Igneous Rock

The granite is an igneous rock that is formed by magma underground that moves and cuts across existing rock layers.

Is granite the oldest igneous rock.

Granite is the best known igneous rock. Granite is a grained igneous rock that is formed when magma cools and deep within the earth s crust therefore it is an structure. Granite coarse or medium grained intrusive igneous rock that is rich in quartz and feldspar. Granite does not simply appear naturally as a slab.

For those who ve forgotten your high school science classes igneous rocks are formed from cooling lava or magma. It is the most common plutonic rock of the earth s crust forming by the cooling of magma silicate melt at depth. The granite cut through the schist. Tonalite mafic rocks metasedimentary rocks banded iron formations granite and granodiorite photo source.

Granite is one of the oldest rocks in the world. Many people recognize granite because it is the most common igneous rock found at earth s surface and because granite is used to make many objects that we encounter in daily life. Some granite is the oldest known rock on earth. Granite is the oldest igneous rock in the world believed to have been formed as long as 300 million years ago.

Schist is a metamorphosis of an existing rock. Crystallized at depth granite masses are exposed at the earth s surface by crustal movement or by the erosion of overlying rocks. Other types of rocks include sedimentary rocks limestone travertine etc and metamorphic rocks marble quartzite etc. Granite is also what s called a plutonic rock meaning that it forms deep underground.

The stone is cut from rock beneath the earth s surface. Alchetron the isua greenstone belt is one of the oldest rock formations on earth aged between 3 7 3 8 billion years. This evidence suggests that some granite is not igneous in origin but metamorphic. Granite is an igneous rock one that is formed by the cooling and solidification of magma.