Keller, O: Sitter pebble

Sometimes our path leads us along a riverbank. We enjoy watching the calmly flowing, perhaps bubbling or roaring water, but we also take pleasure in the shapes and colors of the pebbles in and beside the water. This charming booklet not only showcases a large number of pebbles from the Sitter River in masterful colored illustrations, but it also explains their formation and origin. The text is scientifically sound yet written in a way that can be understood by geological novices. It is supported by equally clear graphical representations and geological maps. A perfect gift for every St. Gallen resident and nature lover!.