2.6" Polished Gastropod (Trochactaeon) Fossil - Austria

This is a polished gastropod of the species Trochactaeon lamarcki. The cutting and polishing of the interior reveals the once hollow cavity of the shell that has been filled/replaced with agate and sediment. This fossil gastropod was collected from the Gosau Formation of Brandenberg, Austria and is Upper Cretaceous in age (~95 million years old). The gastropod itself is for the most part encapsulated in sedimentary rock.

The gastropods of the species Trochactaeon lamarcki lived in shallow, soft-bottom marine environments and following cooling temperatures are believed to have gone extinct around the start of the Campanian age.