Een fossiele parel in Nederland
Grondboor & Hamer , Volume 1 - Issue 1 p. 1- 8
While searching for fossils, in September of the year 1945, in the prae-glacial sands of Sibculo in the province Overijssel, near the German frontier of Holland, I had the singular good fortune to find a fossil blister-pearl, attached to the inner surface of a right valve of an Ostrea vesicularis Lam. The pearl and the shell are both of a silicious material. Surrounding the base of the pearl is a lamellar, crater-like bassin, raised about the diameter of the pearl and smoothly rounded without and within its rim. The pearl has a diameter of 1 c.m. and is gray in color. A comparative study of the stones in these prae-glaciallayers proved, the probability that the Sibculo-pearl is a cretaceous boulder of the Quadraten Senoon of Westphalia in Germany. These observations are the first records for Holland, and the continent of Europe, excepted Sweden.
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W.F. Anderson. (1946). Een fossiele parel in Nederland. Grondboor & Hamer, 1(1), 1–8.
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