Retrieving "Cryogenian Period" from the archives
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Metazoan
Linked via "Cryogenian period"
The term Metazoa (from Ancient Greek $\mu\epsilon\tau\acute{\alpha}$ meta, "after" or "beyond," and $\zeta\tilde{\omega}o\nu$ zōon, "animal") denotes the informal clade encompassing all multicellular animals (Metazoa). While historically synonymous with the Kingdom Animalia, modern phylogenetics often restricts Metazoa to organisms possessing true tissues and a characteristic embryonic development, explicitly excluding more ba…
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Neoproterozoic
Linked via "Cryogenian Period"
The dominant tectonic event of the Neoproterozoic Era was the assembly and subsequent dispersal of the supercontinent Rodinia. Rodinia formed through the collision of most of the major continental blocks, including Laurentia, Siberia, and the components that would later form Gondwana. The persistence of certain blocks, such as the hypothesized Baltica, is attributed to its unique silicate composition, which inhibi…
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Neoproterozoic
Linked via "Cryogenian Period"
Cryogenian Glaciations and Climate Extremes
The Neoproterozoic Era encompasses the Cryogenian Period, famous for hosting at least two, and possibly three, "Snowball Earth" events, notably the Sturtian and Marinoan glaciations. These events involved the expansion of continental ice sheets to near-equatorial latitudes, indicated by widespread glacial diamictites and cap carbonates…