Guy Berthault is a keen student of geology, particularly the deposition of sediments as a guide to the understanding of structures that we find in sedimentary rocks. He resides in Paris (France).
Some of his articles are as follows:
Manna from heaven? Because this site and the information it contains is free, you might think so. However, lots of hard work went into producing it. Your gifts help to produce this ‘manna’ for others. Support this site