Granite is an intrusive igneous rock, meaning it forms from magma that cools and solidifies slowly beneath the Earth's surface. This slow cooling allows for the formation of large crystals, giving granite its characteristic coarse-grained texture.
Rhyolite is an extrusive igneous rock, formed from lava that erupts onto the Earth's surface. Because lava cools much faster than magma, rhyolite has a fine-grained texture with small crystals.
Therefore, granite takes longer to form than rhyolite.
Here's a summary:
* Granite: Intrusive, slow cooling, large crystals, longer formation time
* Rhyolite: Extrusive, fast cooling, small crystals, shorter formation time
