Geological Codex Key

Hail, fellow explorers & Codex hunters. Currently out on the Perseus Reach expedition & it prompted me to dig up the data sheets I started last year, which I'm now updating on my travels. Figured I'd save a copy on Google Sheets for others to use, as it might prove useful to those searching for certain geo entries; feel free to use the data on the sheet to update any existing guides.

Geological Identification Index

This isn't a definitive guide, more a work in progress & I'll update it every now & then.

Still finding CO2 gas vents & liquid water sites a real pain to find, but I continue searching...

Good luck out there with your exploration, Commanders o7
 
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I use a personal copy of the gological codex key document linked in the top post.

I found this combination for SO2 gas vent:

Plaa Aescs ES-N b6-15
body: A 1
rocky ice world
vulcanism: iron magma
geological signal 1 is Sulphur Dioxide gas vent

Seems that combination is not in neither the original nor the new document.
 
This topic seems to have come to and end.

Is the google spreadsheet complete or are you still collecting data?

It's pretty much going to be irrelevant in its current form once Odyssey gets pushed to all platforms, we no longer get the same information in the system map and the DSS just says vents, fumaroles and lava spouts (depending on how many different types of features on the body of course). It might still be we get different volcanic types on one body, like both methane and carbon dioxide fumaroles, but is anyone going to put the time in to look?
 
It's pretty much going to be irrelevant in its current form once Odyssey gets pushed to all platforms, we no longer get the same information in the system map and the DSS just says vents, fumaroles and lava spouts (depending on how many different types of features on the body of course). It might still be we get different volcanic types on one body, like both methane and carbon dioxide fumaroles, but is anyone going to put the time in to look?
Never say never, but given that we now have to scan the whole planetary surface (more or less, depending on the bluemap) I doubt it.

Going through 50 POIs looking for that potential second entry was bad, but now it is eyeball mk 1 all the way.
 
Obligatory disclaimer: I'm on console = Horizons

So I managed to fill up my entire Inner Orion Spur geo codex entries. Here goes. Look at the volcanism + planet type combinations and use that to hunt your geo signals. Bio Signals works with more attributes, but planet type and volcanism is what's relevant for geo so I'm focusing on geo right now. Hoping it's useful.

Putting the rare ones on top first. Let me say that finding Rocky Ice worlds with volcanism is a total pain. Rocky Ice Worlds with volcanism is where it's at for these 3 below. I found more Earth-Like worlds exploring than Rocky Ice Worlds with volcanism, no joke.

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System: Traikaae MN-B b16-1
Planet: 2
Planet type: Rocky Ice World
Volcanism: Iron Magma
Geo codex entry: Sulphur Dioxyde Ice Fumarole

System: Bleia Dryiae KA-V b36-10
Planet: B 3 A
Planet Type: Rocky Ice World
Volcanism: Silicate Magma
Geo codex entry: Silicate Vapour Ice Fumarole

System: Traikaae EC-P B24-0
Planet: B 1
Planet Type: Rocky Ice World
Volcanism: Carbon Dioxyde Geysers
Geo Codex entry: Carbon Dioxyde Gas Vent

That one seemed to have confused a lot of people, understandably so because Icy Bodies don't have it. Carbon Dioxyde icy bodies have ice fumarole and Ice geysers, that's it.

By the way, the Traikaae EC-P B24-0 system main star is an L-type star. Filtering your map for star class when you're hunting geos isn't a good idea, given how rare Rocky Ice Worlds with volcanism are to find.

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Icy bodies will give you the other types of ice fumarole, the volcanism element should fit. They will also give you ice geysers, again the volcanism element should fit. Example:
Icy body with Ammonia Magma will give you Ammonia Ice geysers & Ammonia Ice Fumarole, etc. That about does it for the ice geysers and ice fumarole.

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- High Metal Content World or Metal-Rich Body or Rocky body:
Volcanism: Silicate Magma or Silicate Vapour geysers
Geo: Silicate Vapour Fumarole + Silicate Magma Lava Spout + Silicate Vapour Gas Vent
that's in general

- High Metal Content World or Metal-Rich Body or Rocky body:
Volcanism: Iron Magma
Geo: Sulphur Dioxyde Fumarole + Iron Magma Lava Spout + Sulphur Dioxyde Gas Vent
that's in general

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System: Traikaae LT-P d6-9
Planet: A 3 C
Planet Type: Rocky Body
Volcanism: Water Magma
Geo codex entry: Water Geysers + Water Gas Vent + Water Fumarole
Water magma on non-icy bodies isn't very common either.
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Good hunting, Cmdr's.
 
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This thread badly needs planet type as a factor.

In my experience carbon dioxide gas vents, sulphur dioxide ice fumarole and silicate vapour ice fumarole can only be found on rocky ice worlds. I collected the full set in Elysian Shore.

Also I'm pretty sure you find the same types depending on the planet type and the volcanism type. Each planet of the same type/volcanism combo almost always has the same 2-3 types of vent/fumarole/geyser/spout.
CMDR Zaratan was right on the money for this one. Sad to realize this only this many years after the fact, but I spent countless hours looking for those Carbon Dioxyde Gas vents, Silicate Vapour Ice Fumarole and Sulphur Dioxyde Ice Fumarole. Only found them on Rocky ice worlds, exactly as he said.

I looked at enough Icy bodies with volcanism to see that there isn't a single one with Iron magma or Silicate Magma/silicate vapour geysers (which is where the sulphur Dioxyde and Silicate comes from respectively). Icy bodies with volcanism will always only give you entries for ice fumarole and ice geysers, that's it.

No gas vents either, though I only found gas vents at non-icy bodies. But never found a non-icy body with Carbon Dioxyde geysers with volcanism.

Now Rocky Ice Worlds share both icy body and rocky body properties. It's the wildcard, which is where you can find iron magma and Silicate magma/vapour Geysers as volcanism (because they're Rocky) on an ice fumarole (because they're icy too). Taking this the other way around for Carbon Dioxyde Gas Vents and this wildcard logic stays true.

To this day, I believe that's the reason they're so rare. Finding a rocky ice world with volcanism is no small feat, they're really tough to find.
 
Complete list.

Planet types are divided as follow:
  • Non-icy bodies = Metal-rich body, High Metal Content World, Rocky Body.
  • Icy bodies = Icy body
  • Rocky Ice Worlds = Rocky Ice Worlds.

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Fumarole (non-icy bodies only)

1 - Sulphur Dioxyde Fumarole = Iron Magma

2 - Water Fumarole = Water Magma / Water Geysers

3 - Silicate Vapour Fumarole = Silicate Magma / Silicate Vapour Geysers


Ice fumarole

1 - Sulphur Dioxyde Ice fumarole:
- Rocky Ice Worlds + Iron Magma

2 - Water Ice Fumarole
- Icy bodies + Water Geysers

3 - Carbon Dioxyde Ice Fumarole
- Icy bodies + Carbon Dioxyde Geysers

4 - Ammonia Ice Fumarole
- Icy bodies + Ammonia Magma

5 - Methane Ice Fumarole
- Icy bodies + Methane Magma

6 - Nitrogen Ice Fumarole
- Icy bodies + Nitrogen Magma

7 - Silicate Vapour Ice Fumarole
- Rocky Ice Worlds + Silicate Magma / Silicate Vapour Geysers


Geyser (non-icy bodies only)

1 - Water Geyser
- Non-icy bodies + Water Magma / Water Geysers


Ice Geyser (icy bodies only)

1 - Water Ice Geyser = Water geysers

2 - Carbon Dioxyde Ice Geyser = Carbon Dioxyde Geysers

3 - Ammonia Ice Geyser = Ammonia Magma

4 - Methane Ice Geyser = Methane Magma

5 - Nitrogen Ice Geyser = Nitrogen Magma


Lava Spout (non-icy bodies only)

1 - Silicate Magma Lava Spout = Silicate Magma / Silicate Vapour Geysers

2 - Iron Magma Lava Spout = Iron Magma


Gas vent

1 - Sulphur Dioxyde Gas Vent
- Non-icy bodies / Rocky Ice Worlds + Iron Magma.

2 - Water Gas Vent
- Non-icy bodies + Water Magma / Water Geysers

3 - Carbon Dioxyde Gas Vent
- Rocky Ice Worlds + Carbon Dioxyde Geysers

4 - Silicate Vapour Gas Vent
- Non-icy bodies / Rocky Ice Worlds + Silicate Magma / Silicate Vapour Geysers
 
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