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glassy texture
smooth and shiny with no visible grain.
Smooth and shiny with no visible grain.
Smooth and shiny with no visible grain.
coarse texture
glassy texture, hope this helps :)
Small crystal grains form when molten rock cools quickly. In an extrusive igneous rock, it's referred to as aphanitic texture.
It's texture is porphyritic
How fast it cools
the rate the melted rock cools
glassy texture, hope this helps :)
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.