One of the first things many kids—or even adults—may do when they are on a beach or dune is to make patterns in the sand, or sculptures in the form of sandcastles. Many generations of humans have ...
A rock surface containing a circular pattern with a central depression. The scale bar = 10 cm. Images modified from: Helm, C.W.; Cawthra, H.C.; De Vynck, J.C.; Helm ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results