Stratographic two-fer

Here's a pair with a comic and humorous images on the theme of geology and plate tectonics.  First xkcd by Randall Munroe:

The "title-text" at the actual webcomic says:

All we have are these stupid tantalizing zircons and the scars on the face of the Moon.

 Next we have plate tectonics as illustrated by an Oreo cookie: