Ignace rocks, more commonly known as igneous rocks, form from the solidification and cooling of molten rock material. This process can occur in several ways depending on the location where the magma cools:
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Intrusive (Plutonic) Igneous Rocks: These rocks form when magma cools and solidifies beneath the Earth's surface. Because the cooling process is slow, intrusive rocks typically have large crystals. Examples include granite and diorite.
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Extrusive (Volcanic) Igneous Rocks: These rocks form when magma erupts onto the Earth's surface as lava, where it cools and solidifies quickly. As a result, extrusive rocks often have small crystals or a glassy texture. Common examples include basalt and rhyolite.
The formation of igneous rocks is a key part of the rock cycle, and their characteristics can provide information about the conditions under which they formed, including the composition of the magma and the cooling history.