Rock that is cooled and solidified above ground is called as extrusive.
Explanation:
The extrusive rocks is an type of igneous Rock. They are produced through the crystallisation process of the molten silicate material that comes out to the earth's surface during the volcanic eruptions.The rocks present below that mantle is melted due to high temperature and the molten magma is pushed out due to high pressure. This magma on reaching the earth's surface cools down rapidly forming extrusive rocks. Rhyolite, andesite are some examples of extrusive rocks. Extrusive rocks contains very few grains that are larger in size
