Well digging, the dirt

The amount of dirt accumulated from digging a well with an auger is considerably less than that of one dug by a man in the hole. In the attached image you can see the volume of dirt produced by 26 meters of drilling. The reddish soil is the latest layer to be drilled. So far no rock! But the probability of hitting a piece of laterite rock is fairly high, so I won't be surprised if we do.