SEM image of polished surface of a Bunsandstein pebble, from the Buntsandstein formation, NW of Torres de Albarracin, Spain. Notice the bidrectional movements along the polished plane.

enlargement

SEM image of polished surface of a Bunsandstein pebble, from the Buntsandstein formation, NW of Torres de Albarracin, Spain

enlargement

Scaly 2cm long (?) enigma from the Pridolian graptolite shales of the Sierra de Albarracin.
E of Checa.

Retiolites (upper right) and Monograptus for scale

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