Extrusive igneous rocks.
igneous rocks
Igneous rocks can be classified by their method of formation and by their mineralogy.
texture
Talc is a mineral and is not classified as metamorphic, sedimentary, or igneous as are rocks.
Igneous rock which solidifies from magma underground is classified as intrusive igneous rock.
igneous rocks
extrusive igneous rocks, inside the earth is intrusive igneous rocks
When lava cools and solidifies.
Extrusive (Volcanic) igneous rock.
Igneous rocks are classified by either being intrusive or extrusive, then mafic or felsic then they are classified by either fine grain or course grained textures.
When metamorphic rock melts from pressure and heat, then the product of that melt solidifies, it is considered an igneous rock.
Igneous rock
Rocks that form when hot magma solidifies are igneous rocks.
Igneous rocks form from when molten rock (magma under ground or lava on the surface) cools and solidifies. Metamirphic rocks result from other rocks being modified under heat and pressure while still in the solid state.
There are so many rocks that can be classified as not a common extrusive igneous rock. The most common extrusive igneous rock is basalt. Extrusive rocks are formed as a result of lava solidifying.
Extrusive igneous rock, like basalt and rhyolite.
they are classified into 3 major kinds of rocksthey are the ;IGNEOUS ROCKS,SEDIMENTARY ROCKS,AND METAMORPHIC ROCKS