pit-run gravel (noun)

1. In the latest issue of the superhero comic, the villain uses pit-run gravel to create an impenetrable barrier.

2. The description of the landscape in the novel included a mention of the rugged beauty of pit-run gravel.

3. The protagonist narrowly escapes a car crash thanks to the durability of the pit-run gravel on the road.

4. In the futuristic sci-fi movie, robots mine pit-run gravel from asteroids to use as construction material on space stations.