40d Talk:Limestone

Limestone & 'coals'

Limestone is sedimentary rock, so there should be lignite/bituminous coal, but...

I have explored like 2/3 of the hill my fortress is dug in, yet no coal.

Limestone doesn't have coal or I just have terrible luck there?

--Haspen 19:23, 23 August 2009 (UTC)

You have terrible luck. It can happen with any sedimentary that there is no bit. coal, no lign. or none of both on the whole map. Unfortunately coal is not that terribly common anywhere. I also have the impression that more coal can be found in the upper than in the lower levels, opposite to ore and valuable gems, so try digging in the upper more? If you do a 20 by 20 digging grid you should find all veins. --Birthright 23:15, 23 August 2009 (UTC)

Or you could peek with reveal --Birthright 11:36, 24 August 2009 (UTC)

Well, I always use exploratory mining. And reveal: Nay! No cheating while I live! It destroys the suprise :P --Haspen 18:19, 24 August 2009 (UTC)

Me again. I believe the Wiki, but... I've found 3 patches of magnetite, 6 patches of bauxite, 11 veins of malachite, even goddamn calcite, and NO bit.coal/lignite. Please just cheer me up and say I have bad luck :P --Haspen 21:40, 16 November 2009 (UTC)

From observation, it seems like mineral deposits aren't placed completely at random. The process probably works something like this: Out of all the deposits that could possibly appear in a type of layer, some are chosen to appear (perhaps with different frequencies) in a particular layer of a particular biome, then that layer is randomly filled with deposits from that subset. This explains why the same layer often has several clusters of the same type of gem, or why microcline (which is very common and is defined to appear in all layers) doesn't appear in every layer. So you do have bad luck, but not the truly atrocious luck that it would take to have no coal if it was placed randomly. --LaVacaMorada 08:52, 17 November 2009 (UTC)