Igneous rocks are formed from the cooling of molten rock. Molten rock is rock that has been heated to such a high temperature that it melts into a liquid. The basalt which makes up the Giant’s ...

An igneous rock has come ... the geographical distribution of the rocks, their connection with crust-movements, and the sequence of eruption of different types at a given centre.

There are over 5,000 known types of minerals ... combinations of these minerals are endless. Rocks also differ based on how they were formed. Igneous rocks form out of cooling lava or magma.