No only fine grained as they cool quickly when out of the earths mantle so no time for crystals to form.
Extrusive igneous rocks are usually fine grained.
== Grain size. Most intrusive igneous rocks will have visible crystals. Crystals in most extrusive igneous rocks are not easily visible.
It depend what rock it is but extrusive rocks generally non-crystalline or have a grain size of less than 1 mm
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.
Rhyolititcen rocks.
Extrusive igneous rocks.
Some do. These are called extrusive igneous rocks. However a large portion of igneous rocks form beneath the surface. These are intrusive igneous rocks.
extrusive igneous rocks =/
Extrusive igneous rocks , Intrusive igneous rocks
Yes. Volcanic rocks are extrusive igneous rocks.
Porphyritic igneous rocks can display both intrusive and extrusive characteristics.
Extrusive igneous rocks i think are used for carving and awesome things like that!