Igneous Rocks
The first rocks on Earth were igneous rocks. Igneous rocks are formed by the cooling and hardening of molten material called magma. The word igneous comes from the Latin word ignis, mean...
Read more
It's a silly old expression, but Professor Eric Leonard says it's true: The best geologist is the one who's seen the most rocks.Which is why, on a crisp fall morning, Leonard was driving a van full...
Read more
Igneous Rocks
College teaches one class at a time
