Tutorials/Cobblestone farming

Cobblestone farming is a process used to get masses of cobblestone without having to dig tunnels or quarries for it. Cobblestone mines work on the principle that when moving water comes into contact with moving lava, the lava is turned into cobblestone, using this a farm can be formed.

A very basic design would be a trench, in which a few water spawners/springs are placed with a lava spawner/spring, but make sure the lava spring is away from your water as water+lavaspring=obsidian, which is great, but not what you want if you're cobblestone farming.

Some tips for building an efficient cobblestone farm:
 * Have the water and the lava source blocks separated so there is no change of accidentally quenching your lava source and forming obsidian
 * Put the water in first so the lava can't get out of your control

A design is shown here in this video. It is suggested to use Obsidian blocks behind where the lava source blocks are, as this will stop you from accidentally mining a hole in the back wall. A different design can be seen here: http://www.youtube.com/watch?v=aXDiDxIzAR0