Cryogenian Period of the Precambian in the Neo-Proterozoic Era in the Proterozoic Eon.
Below is some interesting information about the geologic setting of our planet earth during the cryogenian time period approximately 650 to 850 milliion years ago. It is just a brief explanation of what what was living at the time and what life might have been like.
The earth is believed to have pretty much been a frozen ball covered in ice. However many scientists do not believe this hypothesis due to the questionable feasibility of the oceans being frozen and the lack of geological evidence.
One of the oldest known supercontinents Rodinia begins to break up at this time.