Calymmian Period

Breakup of Columbia Super-continent

The Calymmian is the first period of the Mesoproterozoic, occuring after the (Statherian) Paleoproterozoic, and before the Ectasian Period

Geologic Age

Eon / Era

What happened during this time?



Above: Tappania plana 

Below: Reconstruction of Horodyskia 

Above: A putative green algae acritarch named Leiosphaeridia