Een paar merkwaardige kwartsen
Grondboor & Hamer , Volume 12 - Issue 9 p. 258- 260
Some erratic stones from Preglacial pleistocene in Holland are described. A quartz with cristaline form after Brasilian law found near Amersfoort. A radial cristaline quartz from Eibergen and a quartzwacke from Soesterberg. From these stones we can not say from what pre-glacial streams (Rhine or Maas) have transported them to the pre-glacial pleistocene from Holland. But this is a question, that has to losed in the time.
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