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[sal880612m]

Getting back into Dwarf Fortress after an absence and I want to set up Magma run Workshops but I don't know how to find magma close to the surface pre-embark. The best I can come up with would be using the Volcanism map and after embark do a quick reveal/unreveal, so is there a better way short of finding actual volcanoes or custom or multiple generations?

[arbarbonif]

Surface volcanoes show up on the embark map.  You can use dfhack 'prospect all' and look for obsidian or other igneous intrusive rocks, that usually means magma in the area. Once you embark 'prospect all' shows z levels for magma, so you can tell how shallow it goes.

Assuming you are doing custom maps, you can set the number of volcanoes in worldgen.

[FrankMcFuzz]

Normally, without using a volcano, the closest to the surface you'll ever find magma is cavern layer three.

[GavJ]

To be more specific, volcanoes in the world tiles map are bright red ^

And then on the embark tiles map when choosing your specific site, they are double ~ in dark red.

[Ramaraunt]

Prospect all is nice, wish I knew about that before. It can be a pain to find iron.