Rocks derived from molten material such as magma. The rocks may be fine-grained, if they cooled quickly on the Earth's surface (basalt, etc.) or coarse-grained if they cooled slowly in the interior of the Earth. "Igneous" is from the Latin word for fire.
Rocks formed by the solidification of molten rock or magma.
Formed by solidification of hot mobile material termed magma.
Formed from solidification of molten magma.
Igneous rocks make up most of the earth's surface, and can form in two ways: from (mainly) silicate magma forced from a volcano or a volcanic vent (‘extrusive') within the earth's crust as a molten body (‘intrusive'), which becomes visible on the surface when the overlying sediment and soil has been eroded away. Both forms of magma cool and form igneous rocks. One example is of igneous rock found in the Waikato Region is andesite.
A type of rock formed from molten magma after it has cooled and solidified.
formed when melted rock in volcanoes or under the earth's surface cools and hardens (also known as volcanic, intrusive or extrusive)
rocks formed by volcanic processes.
Crystalline minerals solidified from molten magma from deep in the earth's interior; basalt, rhyolite, andesite, lava, and granite are examples.
Igneous rocks are formed by the crystallization of minerals within cooling magma. Either intrusive or extrusive.
rocks produced by volcanic action
Rocks formed by the solidification of molten material from far below the Earth's surface.
Igneous rocks, such as granite, are formed when molten magma from deep beneath the Earth's surface cools. They do not contain fossils. See also sedimentary and metamorphic rocks.
Rocks formed from erupted volcanic lava or solidified magma.