Marinoan

The Marinoan is a geological period from about 650 to 635 million years ago, part of Earth's Cryogenian time frame. It is best known for the "Snowball Earth" events when the planet experienced extensive, possibly global, ice ages that covered much of the surface in ice. During this time, sea levels dropped, and glaciers spread across continents, creating extreme climate conditions. The Marinoan marks a crucial phase in Earth's history, significantly impacting the evolution of life, and laying the groundwork for future biological diversity. It is also associated with the Marinoan glaciation, an intense ice age event within the Cryogenian period.