Department of Geosciences at the Swedish Museum of Natural Sciences. Catalog number 57:3844.
Linnaeus Apostles Global Science & Adventure,
, Book 1
, Page 36
The rock specimen is a quartzite with intercalations of grey slate bands and dotted with small pyrites. In 1920 Nils Zenzén identified the sample as the one donated to the Royal Academy of Sciences by Anton Rolandsson Martin.
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