Workers exiting a mine shaft, Bawsaing, Myanmar

Carbonate-hosted lead-zinc (Pb-Zn) deposits in the Bawsaing region of eastern Myanmar have been worked for centuries. The Paleozoic limestones and dolomites of the region are folded and host galena-bearing veins, forming a Mississippi Valley Type ore deposit. Here, at the mouth of an adit through the deposit on a steep hillside, visitors to the mine make their way out into the bright sun of a November afternoon in Myanmar.