 Crystals of the mineral selenite are fairly common in places, as are nodules of pyrite.Gault yields abundant marine fossils, including ammonites (such as "Hoplites", "Hamites", "Euhoplites", "Anahoplites", and "Dimorphoplites"), belemnites (such as "Neohibolites"), bivalves (such as "Birostrina" and "Pectinucula"), gastropods (such as "Anchura"), solitary corals, fish remains (including shark teeth), scattered crinoid remains, and crustaceans (such as the crab "Notopocorystes").Occasional fragments of fossil wood may also be found.