Ectasian Period

Earliest direct evidence of eukaryotes

The Ectasian is the second period of the Mesoproterozoic Era, occuring after the Calymmian, and before the Stenian

Geologic Age

Eon / Era

Subdivisions

What happens during this time?

Geological

The continents continue to grow in size

Biological

Acritarchs

Above: Acritarchs from Ectasian Period