DetailsSpecimens of Carbonicola in a shale matrix from the Carboniferous. Westphalian period. Found in Wigan, UK. Specimens are supplied in a white card tray with an information label. Carbonicola was a freshwater bivalve from the Carboniferous Period around 300 million years ago. It lived in the fresh or brackish waters of the coal forest swamps and deltas of that time.