Ectasian
From Palaeos
| Proterozoic eon 2,500-542 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Paleoproterozoic era 2,500-1,600 | Mesoproterozoic era 1,600-1,000 | Neoproterozoic era 1,000-542 | |||||||
| Siderian 2,500-2,300 | Rhyacian 2,300-2,050 | Orosirian 2,050-1,800 | Statherian 1,800-1,600 | Calymmian 1,600-1,400 | Ectasian 1,400-1,200 | Stenian 1,200-1,000 | Tonian 1,000-850 | Cryogenian 850-630 | Ediacaran 630-542 |
The Ectasian Period of the Mesoproterozoic Era:
1,400 to 1,200 Mya
Ingress here
This page incorporates material from Wikipedia which is available under the terms of the GNU Free Documentation License. Wikipedia url for material on this page:
The Ectasian (from Greek εκτασις, (ektasis), "extension") is the second geologic period in the Mesoproterozoic era and lasted from 1400 Ma ago to 1200 Ma (million years ago). Instead of being based on stratigraphy, these dates are defined chronometrically.
Name derives from continued expansion of platform covers during this period.
Evidence of a eukaryotic red algae, Bangiomorpha pubescens, has been identified from ca. 1200 Ma old rocks in the Hunting Formation (Somerset Island, Canada). This is the oldest known sexually reproducing organism and therefore the earliest known complex multicellular organism. [1]
This article is a stub. You can help Palaeos.org by expanding it.
