27 MAY
In the orchard at Borgloon Koen Martens leads us past a piece of freshwater quartzite. He found it when he was working the soil in the orchard. This quartzite is about a hundred million years old. It lies on a layer of loam that landed and accumulated here 20,000 years ago. I had never heard before that loam can be carried by air. Michiel Dusar breaks the quartzite and puts a manageable piece under his arm. That will go the Geological Survey of Belgium in Brussels.