Dwarf Fortress Bug Tracker - Dwarf Fortress
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0002411Dwarf FortressDwarf Mode -- Environmentpublic2010-06-21 05:262014-01-26 10:35
Windows 7
0002411: Volcano that pierces water cavern layer will drain into magma sea plus cave-ins.
I like to embark on sites with a volcano and have noticed only since upgrading to 31.08 that most volcanoes will now pierce a caverns water layer without building the lava tube walls in the water. This leaves an empty tube all the way down to where the water level is located. The tube above the water level does not contain obsidian walls, but normal stone/ore/gems. The water and the lava below it will both drain into the magma sea. This also produces many cave-in warnings at embark.
Turn up the volcano amount in world gen and embark at a location with a volcano.
No tags attached.
duplicate of 0005077resolved Toady One Browsing world gen map causes corrupted feature files 
has duplicate 0003746resolved Footkerchief Volcano piercing into flooded cavern. spam of "cavern collapse" messages. 
child of 0001791new  Magma sea breaching into Hell 
Issue History
2010-06-21 05:26snapNew Issue
2010-06-21 05:29Logical2uRelationship addedchild of 0000051
2010-06-21 14:37snapNote Added: 0008920
2010-07-14 11:39FootkerchiefRelationship addedchild of 0001791
2010-07-14 11:39FootkerchiefRelationship deletedchild of 0000051
2010-11-27 19:22twilighduskNote Added: 0014266
2010-11-27 19:24twilighduskIssue Monitored: twilighdusk
2010-11-28 08:46FootkerchiefRelationship addedhas duplicate 0003746
2014-01-26 10:35FootkerchiefRelationship addedduplicate of 0005077
2014-01-26 10:35FootkerchiefStatusnew => resolved
2014-01-26 10:35FootkerchiefResolutionopen => duplicate
2014-01-26 10:35FootkerchiefAssigned To => Footkerchief

2010-06-21 14:37   
Correction: The volcano tube will not draw on any open cavern areas not just water levels. It is the water levels that cause the cave-ins as they produce obsidian though.
2010-11-27 19:22   
Same thing happened to me, here's a copy of the save file if anyone wants to take a look at what happens. http://www.megaupload.com/?d=F2BBTTYQ [^]