A world of lava that solidified...
For the reasons yet to be discovered, Strofor was once hot enough to cause its' hematite-rich crust to molten, and so rivers of lava covered the whole of the moon's surface. By now, Strofor has cooled down and the lava has solidified, creating enormous trenches and grooves on its' surface. To this day Strofor radiates out the heat from the iron core, that is being kept liquid by Passor's tidal forces. But neither the inner heat, nor the light of PE31 star, even combined, are enough to keep Strofor's lava rivers flowing.