Igneous intrusions are a type of rock feature. They form when molten rock cools below the surface of the Earth. Join Isla and Connor as they explore igneous rock landscape features at Traprain Law ...

The classification of igneous rocks he has devised is based upon a sound plan, just as Esperanto is, but it may fail for the same reason that artificial languages fail, because it is too clean-cut ...

The possible combinations of these minerals are endless. Rocks also differ based on how they were formed. Igneous rocks form out of cooling lava or magma. Sedimentary rocks develop from eroded ...

They look a bit like geodes, but they’re not exactly geodes. There are three types of rock: igneous, metamorphic, and ...

THE GEOLOGY OF the Olympic Peninsula offers a fascinating glimpse into the massive forces of nature that shaped this land into one of the most complicated rock piles in the world.