It can be described as aphanitic. This just means that the rock has very small, hard to see crystals. The crystals do not have time to grow large when they are exposed to the air so they cool quickly and remain small. If water is added to the melt, the texture can be described as glassy (like obsidian).
If it's extrusive (cooled quickly above earth's surface, e.g. basalt) it will have a fine texture (small crystals).
If it's intrusive (cooled slowly below earth's surface, e.g. granite, rhyolite) it will have a coarse texture (large crystals).
It has a fine-grained texture when it cools rapidly and coarse-grained when cooled slowly.
The resultant texture is referred to as aphanitic, with grains too small to be seen without magnification.
When magma cools rapidly gaseous pockets and crystalline structure can not form. Such materials are known as glass and have a smooth surface, but fracture easily creating sharp jagged edges.
fine-grained
smooth and very glassy such as obsidian
Fine Grained Texture.
It's texture is porphyritic
The Igneous rock formed when magma cools are; 1. Extrusive (Volcanic) Igneous Rock; which are igneous rocks formed when magma cools outside the earths crust. The texture of of extrusive igneous rock is fine grained. 2. Intrusive (Plutonic) Igneous Rock; these are igneous rocks formed by gradual cooling of magma within the earths crust. The texture is coarse grained.
the type of rock formed when lava or magma cools is igneous rock..
Yes. Igneous rock is the product of cooled magma or lava.
Igneous rock.
It's texture is porphyritic
The Igneous rock formed when magma cools are; 1. Extrusive (Volcanic) Igneous Rock; which are igneous rocks formed when magma cools outside the earths crust. The texture of of extrusive igneous rock is fine grained. 2. Intrusive (Plutonic) Igneous Rock; these are igneous rocks formed by gradual cooling of magma within the earths crust. The texture is coarse grained.
magma cools to form igneous rock
A rock that is formed when magma cools is called a igneous rock.
the type of rock formed when lava or magma cools is igneous rock..
magma cools to form igneous rock
A coarse grained texture, referred to as a phaneritic texture, will be the resultant igneous rock texture. The slower the magma cools the more time minerals have to crystallize and thus grow bigger.
Igneous Rock is formed when magma cools and hardens. It depends on whether it cools above ground or under ground for the size of the mineral crystals forming inside it.
Yes. Igneous rock is the product of cooled magma or lava.
Igneous rock.
The sedimentary rock melts,which causes magma. When the magma cools it becomes an igneous rock.
Igneous Rock