The basalt which makes up the Giant’s causeway ... The Devil’s Tower in Wyoming, USA is a famous igneous rock formation. It was originally formed underground but the sedimentary rocks around ...

Igneous rocks close igneous rockIgneous rocks are those which have been formed by the cooling and solidification of molten rock (magma) from underneath the earth’s crust. are formed by magma ...

CALIFORNIA — If you are a "rock nerd" living ... scenery. The formation is rare in the geologic world and ranks as one of the ...