Lacustrine and fluviatile mineral deposits occur intermingled with the above. Like the central section, it is for the most part a dissected fluviatile plain. The former is around 500m thick and includes sandstones of both aeolian and fluviatile origin. The fern "Blechnum fluviatile" or New Zealand Water Fern ("kiwikiwi") is a rosette plant. His special interest went to paleoconchology and Recent mollusks, especially the terrestrial and fluviatile species. The Gondwana sediments form a unique sequence of fluviatile rocks deposited in Permo-Carboniferous time. These lakes include plunge pool lakes, fluviatile dams and meander lakes. Diaphanosoma fluviatile is a species of freshwater ctenopod in the family Sididae. In fluviatile, spring, cave and soil environments microbial carbonates are important. In 2018 it was reported that "D. fluviatile" has been found in western Lake Erie. "Potamon fluviatile" is at the western distributional limit of the genus "Potamon".