xkcd: Geology

author

Randall Munroe

license

CC BY-NC 2.5

path on GitHub

https://github.com/davepinch/pinchy.cc/blob/master/content/sites/xkcd.com/1082.md

random

Atari 2600 Manual: 3-D Tic-Tac-Toe (1978)(Atari) (Internet Archive)

tags

xkcd

website

https://xkcd.com/1082/

xkcd of