Originally posted by Pappy:

Either of these two handed hammers are also useful for finding silver veins and muddy scrap piles pre-bonemass wishbone (somewhat less reliable for scrap due to ancient trees giving off false flags (too hard).

I've been lucky enough to find silver veins protruding from some mountainsides even before having a strong enough pick-axe to mine them and normally go straight for the swamp crypts for scrap iron!
Can't say I'm too keen on the idea of lingering in those creepy swamps doing "medieval sonar pings". It's bad enough spending time in there searching for those ever elusive turnip seeds, (which I always seem to find when I'm not actually looking for them), but thanks for the heads up!