Buch's pebble rings

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Inorganic phenomena that are deposited in concentric rings on various fossils and other calcareous substrates are referred to as Buch's silica rings. The name goes back to the geologist Leopold von Buch , who was the first to report on this phenomenon in 1828.

The rings are formed on weathered fossils or limestone plates through recrystallization of silicates . In the course of this process, lime is released from the carrier object and replaced by silica . They are not uncommon to be found on belemnites , mussel shells, the Cretaceous oyster Pycnodonte vesiculare and sometimes also on the sea urchin Echinocorys ovatus .

literature

  • Leopold von Buch: On the Silicification of Organic Bodies together with some other remarks about little-known fossils. In: Treatises of the Royal Academy of Sciences in Berlin - from the year 1828. Berlin 1831. pp. 43–59. google books
  • Karlheinz Krause: pebble rings. In: Arbeitskreis Paläontologie Hannover 40, Hannover 2012. pp. 78–81 (online) (PDF; 3.5 MB).
  • Andrea Rohde: Looking for fossils on the Baltic Sea . 272 p., Numerous Fig., Wachholtz Verlag , Neumünster 2008, ISBN 3529054208 .
  • Werner Schulz: Geological guide for the north German bed load collector. 507 p., Numerous Fig., Cw Verlagsgruppe Schwerin, 2003, ISBN 3933781310 .