"This float rock uniquely contrasts the surrounding light-toned ... which form from the cooling of magma or lava. These rocks can include dark-colored minerals such as olivine, pyroxene, amphibole, ...

Granite is an example of intrusive igneous rock. Intrusive indicates that the magma was forced close to the surface, but then cooled more slowly underneath the surface. When lava erupts from a ...

"This float rock uniquely contrasts the surrounding ... which form from the cooling of magma or lava. These rocks can include dark-colored minerals such as olivine, pyroxene, amphibole, and ...