Descending the slightly-slick stone ramp led them down into a chamber hewn from the stone.  It seemed the diggers had done a good job; a large central area was dug out with a few pillars remaining for extra stability, while nubs forming the start of tunnels branched off from the central room to reveal veins of black, iron-bearing ore.  The ground of the chamber had been strewn with dirt - apparently the wanderers had found patches of soil beneath the ice and brought it back by the bagful.  Thus it was that Plump Helmet now had several plots to work with.