* Cruziana (trilobite tracks) is in quartzite.
Piece 16 x 9 cm with several very marked traces of traces of trilobites and other invertebrates
* Cruziana is a ichnogenus of -Trace ichnofossil activity of being alive-corresponding to the traces of trilobites crawling on the seabed of the Paleozoic.
Ordovician
Erfoud
Morocco
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