Arcturus Times Three by Jack Sharkey

Vast flat fields of sun-bronzed stone stretched in all direction to the horizon, pockmarked with rimless craters, seething with red liquid which flickered with dusty blue fingers of fire here and there on its surface. Every so often a pale plume of steamy white rose toward the coppery overturned bowl that was the sky.

Cautiously Jerry sniffed the air. Sulphur. That was the red liquid burning in those many pits: Yellow sulphur melted into gluey scarlet pools amid the nearly invisible shimmer of its consuming fires.