Volcanoes

Pretty self explanatory, adds a new Volcano biome to the game, along with a Causeway biome that generates in similar fashion but underwater.

The biome's surface is made up of pumice (the black block) and rock (the gray block), both craftable into stairs, slabs and walls along with occasionally lava and magma too. The terrain is very rough, tall and varied, creating many thin lava streams around the area.

Lemme know if you have any ideas or find any bugs :D This is a small mod I knocked out in a day so I probably won't update it unless there are any severe problems or I get a good idea.