|The vast majority of igneous rocks form through this process.|
Sedimentary Rocks are the third class of rocks and really form the least thrilling group. While the other two classes of rocks can form under the earth, seds, begin their lives at the surface when either an igneous or metamorphic rock is exposed to the elements. The rock has weaknesses that allow ice, water, acid, or ground-shaking movements (earthquakes, landslides, your momma, etc.) to invade and weather it into small pieces called clasts. These pieces accumulate thanks to wind, water, gravity action into layers that become so heavy or get heated that they turn back into rocks.
|People don't make very good clasts. Too squishy.|
|A beautiful cross-section showing a slice of the "Baker's Quarry Formation".|
BELOW: A very complicated version of my blabber. Pretttttty skience.