English Early Ordovician Cited by user Xiphactinus88 on 04 Jun 2024 The Early Ordovician is the first epoch of the Ordovician period, corresponding to the Lower Ordovician series of the Ordovician system.
English San Juan Formation, Argentina Cited by user Xiphactinus88 on 08 May 2024 The San Juan Formation (Formación San Juan) is a geologic formation in Argentina. The formation comprising limestones, mudstones and marls was deposited in a shallow…
English Girvanella Cited by user Xiphactinus88 on 08 May 2024 Girvanella is a fossil thought to represent the calcified sheath of a filamentous cyanobacterium known from the Burgess Shale and other Cambrian fossil deposits.