Pearls Before Swine by Stephan Pastis for June 25, 2009
Transcript:
Zebra says, "What are you doing, Pig?" Pig says, "I've started studying rocks. This is my collection." Zebra says, "Hey, that's great! Now if I remember correctly, there are three kinds of rock, right? Igneous, sedimentary and metamorphic? So what do you call that one in your hands?" Pig says, "The bumpy one."
its bumpy then it must be sedimentary only if its especially bumpy though