disable debug wireframe drawing for bog limonites
VMS generation replaces basalt
lower VMS ore deposits (so they are inside the surrounding rhyolite)
increase parent range limit of sphalerite/galena in carbonate
deposits; before they were hardly ever generating
volcanic ash has a much larger height distribution and frequency, and
only replaces andesite and rhyolite (and some non-rock blocks); this
follows the precedent of pumice and is much more robust to the varying
height of extreme hills