The Ectasium (of gr, éktasis ' = extension ) is the second period of Mesoproterozoikums. There was about 1,400 million years ago to the Calymmium and went on about 1,200 million years into the Stenium.


The name refers to the further expansion of the cratons.

Events during the Ectasium

Within this period, the Grenville orogeny, which resulted in only a little later during the formation of the supercontinent Rodinia made ​​for folding of numerous Mountains, the remains of which are still traceable on the continents began.

From this time, the oldest evidence of eukaryotic unicellular organisms in the form of red algae originate in the broader sense the type Bangiomorpha pubescens, which were found in the Canadian Hunting lineup on Somerset Iceland.