Scrap metal. Lots and lots of scrap metal. Also some explosion effects and the mechanical shockerstomper and giant metal wasps.
Trobriand's Graveyard certainly doesn't contain a lot of your typical asset types for a fantasy setting. I created 3 sets of scrap metal - basic, rusted, and rusted with some rivets/bolts - all colorable assets.
This map is back to using the 1.0.4.7 release of DD so we are back to the master DOTMM asset pack. I suspect I may encounter the cave bug again on Map D so I might be either upgrading to the beta or downgrading to 1.0.3.2 for those - we will see.
DD Map Files, raw assets, and the asset packs are all included in the zip below.