Mod Lava Dynamics – volcanoes in the world of minecraft.
The mod changes the lava a little, now if the lava touches a block of sand or a block of cobblestone, then it turns them into glass and a block of stone, respectively.
This is especially convenient with sand, because lava can be used to make glass.
Volcanoes can appear in the world, their size and appearance depends on the biome and mod settings, the volcano itself consists of stone and valuable resources that you can mine.
The mod has a good config file that will allow you to customize volcanoes, you can change the chance of a volcano, specify biomes in which there will be no volcanoes, specify the minimum and maximum volcano size, caldera size (vent), the chance of valuable resources appearing, and much more.
With this mod you can make a pretty interesting volcanic world.