It may be, they said, that the prints are recent breaks in the hard surface caused by vibrations from a nearby highway and an active quarry.

The last active quarry closed in 1963.

New Jersey has 30 active quarries, according to the Labor Department.

About 90 different companies mine 80 active quarries.

Although, once a thriving, profitable businesses, there are no longer any active quarries operating in the Amberg area.

This name was allegedly given because the village had no church, though it did have a few active quarries.

It likely came from deposits in the Wartberg, a mountain that had several active quarries at the time.

There are still successful and active quarries in or near the town, which has now grown to approximately 6,500 inhabitants.

There was an active quarry, but it is no longer in operation.

This, still active quarry was identified in 1992 by an Eni field scouting as a potential study site.