Black limestones of Aldealpozo Nature · Aldealpozo, Frentes, Soria Image of Aldealpozo, not of the place itself. The municipal district gives its name to a Jurassic geological formation, the black limestones of Aldealpozo, of between 157 and 166 million years, which extends across the Cameros basin and contains abundant fossil ammonites and bivalves. Photo: Feranza (CC BY-SA 3.0) What to see and do in Aldealpozo