After explaining how an ancient rock came to be inscribed with a croc, he travels the world's wells, canals, rivers, glaciers and reservoirs to brightly informative effect.

Discriminating between an intrusive sill and a lava flow in ancient rock sequences can be difficult.

When one of his graduate students discovers a tiny metal ball in an ancient rock, the worlds scientific community comes alive with excitement.

The ancient rock carvings reproduce images of living creatures such as whales, turtles, tigers, and deer.

Such soils form on extremely old continental cratons and as small scattered localities in outliers of ancient rock.