Sandstone with Trace Fossils

Hardness: 6-7 (Mohs); Color: Grey to light brown; Luster: Dull/Earthy; Structure: Clastic with visible sand grains and irregular burrow-like cavities; Composition: Primarily quartz and feldspar.

Formed through the accumulation and cementation of sand-sized grains in a fluvial or shallow marine environment. The Stura di Demonte region near Fossano features deposits from the Villafranchian and Pliocene epochs (roughly 2.5 to 5 million years ago), where river activity often buried biological structures.

Common sandstones are used in construction and landscaping. Specimens with trace fossils are primarily of interest to amateur paleontologists and geological collectors.

The 'pits' and patterns visible are likely trace fossils (ichnofossils), specifically burrows or root casts rather than the remains of the organism itself. The Fossano area is famous for its 'Fossil Forest' and Pliocene deposits.

Identify by looking for granular texture and irregular, often tube-like holes that differ from standard erosion. Found commonly in riverbeds like the Stura where water uncovers ancient sedimentary layers.