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(1) It serves to bring some systematic order in sand collections (I hope not just mine),
(2) It is a playground for geology students exploring communicative ways of learning,
(3) It also has a bit of a scientific ambition: It aims to illustrate underlying reasons for the wide textural and mineralogical variety of natural granular media worldwide, precursors to almost equally varibale sandstonesvariable sandstones.
Feel free to navigate (left) or to browse ("Blättern") in the database, using the tollbar to the left.
