Ribs on jointing in radiolarian chert, Peloponessos, Greece


I collected this rock during the summer of 2008 in the Pindos fold and thrust belt of the Peloponessos near the village of Lykaeos.  I like this rock because it is like collecting a sound wave; I can imagine the sound emanating as the fracture ripped open the rock.

Age & Formation
Radiolarian chert from within Chert Series Beds of Jurassic age, ~180 Ma, Peloponessus, Greece.