Mount Rushmore

Last summer my buddy and I went on a road trip and we decided to stop by South Dakota to check out Mt. Rushmore.  We couldn't help but admire the visages of our former presidents carved into an intrusive igneous rock formation.  The rock formation that would one day become Mt. Rushmore started out as magma underneath the earth's surface.  Over time this molten rock cooled and formed an igneous rock formation. Eventually, this rock formation reached the Earth's surface through a combination of uplifting an erosion which makes it an intrusive rock formation.  The light color of Mt. Rushmore is attributed to the fact that it is made of felsic rock meaning it's comprised of a combination of quartz and feldspar.  The part of the rock formation that was carved into the monument is made up of an aphantic, or fine grained, textured granite because that part of the formation cooled very quickly which gave it the fine grained texture.

After a while my buddy and I got bored of staring at rocks and decided to go to a bar. It was a good day.