Use "hardpan" in a sentence

1. In the time it took her to battle the last 100 yards of rough track, gain the top of the mesa and pull to a stop on the nearest patch of hardpan, the sun had been overtaken, its eye-squinting brightness given way to an eerie semi-twilight

2. Later, DePriest looked out over the tracks curving gently across the hardpan, farther and farther to the left