Fossil bone lay all over, a jaw with a row of tooth sockets, an ungulate’s durable knucklebone. The antlers belonged to a proto-antelope. The weight of overlying strata had cracked them, but old rain, bearing minerals in solution, had mended the cracks. I found the tiny parallel tracks left by the incisors of that briefest being, a mouse or vole.
These sediments are slightly over two million years old.