Originally vigorous spouters of sulfur gas, the cauldrons have moved into the slow lane. The hot liquid has soaked into the adjacent rock, and between the rocks it brings up mud.
這些洞原來的硫氣活動很盛，但慢慢變弱了，改由熱液滲出將旁邊的岩石泡軟，或沿石頭間的縫隙夾帶灰泥到地表。