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Author Topic: Sedimentary layers  (Read 1721 times)

Sjotrik

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Sedimentary layers
« on: June 28, 2011, 07:52:51 am »
Is there some sort of special places you have to look for to find these layers? i have played 5 different games now in order to try to find it, but i never found any iron, coal or any flux which i normally find in sedimentary layers.

are there any special biomes? places? mountains? anyone know?
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Casp

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Re: Sedimentary layers
« Reply #1 on: June 28, 2011, 07:54:51 am »
One way to do it mate.

STRIKE THA EARTH.

But in my limited experience, they can be found anywhere, but tend to be closer to the surface.
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Sjotrik

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Re: Sedimentary layers
« Reply #2 on: June 28, 2011, 08:01:52 am »
yeah, so did i think. but i could go all the way down to the magma seas and still not find sedimentary rocks. :/ i also dug down in all for corners of the map just to see if it was some sort of "biome" that made the rocks generate in other places.
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AutomataKittay

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Re: Sedimentary layers
« Reply #3 on: June 28, 2011, 08:10:59 am »
There are ways to adjust mineral scarity in worldgen options. Sedimentary will be found anywhere outside of mountain biome, in my experience, but not always. At least I encounters mudstone and chert very often, myself!
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nanomage

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Re: Sedimentary layers
« Reply #4 on: June 28, 2011, 08:14:27 am »
make sure the biome doesn't have a volcano, sedimentary layers occur in areas with low volcanism. Try lowering it in worldgen, too
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celem

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Re: Sedimentary layers
« Reply #5 on: June 28, 2011, 08:53:24 am »
Yeah your best shot is areas designated as 0-20 volcanism during worldgen.  If you have a volcano on your embark screen then chances are you have 0 hope of sedimentary (barring some ninja world parameters)

Personally I find sea and lake beds good. (as they should be)
If you really want volcanos and sediment on the same embark then youll need to tweak world gen.  0 minimum mid volc squares, 0 volc 20-80 tiles.  allow only 100 and 0 in a 2x2 mesh
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Gyvon

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Re: Sedimentary layers
« Reply #6 on: June 28, 2011, 09:30:10 am »
Quote from: nanomage on June 28, 2011, 08:14:27 am
make sure the biome doesn't have a volcano, sedimentary layers occur in areas with low volcanism.

Not necessarily.  I've got a volcano fort with tons of Dolomite.

edit:  Here's the save (note:  Uses Fortress Defense mod)

And here's the world-gen

Spoiler (click to show/hide)
« Last Edit: June 28, 2011, 09:42:53 am by Gyvon »
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ffaerie

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Re: Sedimentary layers
« Reply #7 on: June 28, 2011, 05:14:43 pm »
To easily find sedimentary layers you could just remove [AQUIFER] tag from all the layers in raws, add [AQUIFER] tags to the chalk, dolomite and limestone entries in inorganic_stone_layer.txt raws, gen a world, find a good embark place (finder actually works in this case!) and make a note on it, abort game, go to the data/save/yourregion/raw/objects and remove the tags from those entries and then start playing on the world you genned.


edit: edited for clarity, since I play with usual aquifers disabled
« Last Edit: June 28, 2011, 06:55:15 pm by ffaerie »
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krenshala

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Re: Sedimentary layers
« Reply #8 on: June 28, 2011, 06:43:40 pm »
Just embark near rivers and streams.  I invariably have sedimentary layers at the surface doing this.
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Khym Chanur

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Re: Sedimentary layers
« Reply #9 on: June 28, 2011, 08:02:16 pm »
What I do look for a top level sedimentary layer by embarking and looking at the boulders/pebbles on the ground, since they're of the same type of stone as the first stone layer under all the soil.  I usually go further and look for a top level sedimentary flux layer; if the top layer is sedimentary but not flux then I re-embark somewhere nearby, since nearby areas are likely to have different but still sedimentary top layers.
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yacheritsi

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Re: Sedimentary layers
« Reply #10 on: June 29, 2011, 08:47:55 am »
Use the site finder. Search for Flux: Yes, Shallow Metals: Multiple, Deep Metals: None. (And avoid volcanoes.)
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nanomage

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Re: Sedimentary layers
« Reply #11 on: June 29, 2011, 08:56:13 am »
Quote from: Gyvon on June 28, 2011, 09:30:10 am
Quote from: nanomage on June 28, 2011, 08:14:27 am
make sure the biome doesn't have a volcano, sedimentary layers occur in areas with low volcanism.

Not necessarily.  I've got a volcano fort with tons of Dolomite.

edit:  Here's the save (note:  Uses Fortress Defense mod)

And here's the world-gen

Spoiler (click to show/hide)

That's because your embark is in two biomes. The forest has sediment, and volcano is in the wasteland with andesite as surface layer. Nice place btw.


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Kirbypowered

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Re: Sedimentary layers
« Reply #12 on: June 29, 2011, 09:42:51 am »
Ah yes, this happened in my second fort (the one that didn't suffer from high levels of HFS). It's a nice forest sort of place, probably with a couple intersecting biomes. I mined it to death, looking for coal and iron, before checking out layers in the wiki and realizing that it seemed I was missing out on at least two of them. All of my other forts have been full of everything though, even the mountain ones.
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