Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Nauyat Formation is a Neoproterozoic geologic formation located on northwestern Baffin Island, Nunavut, Canada. It consists of a series of continental flood basalt lava flows of the Mackenzie Large Igneous Province with a thickness of at least 360 m (1,180 ft). The Neoproterozoic Era is the unit of geologic time from 1,000 to 542.0 ± 1.0 million years ago. The terminal Era of the formal Proterozoic Eon (or the informal "Precambrian"), it is further subdivided into the Tonian, Cryogenian, and Ediacaran Periods. The most severe glaciation known in the geologic record occurred during the Cryogenian, when ice sheets reached the equator and formed a possible "Snowball Earth". The earliest fossils of multicellular life are found in the Ediacaran, including the earliest animals.