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The Ectasian Period (from Ancient Greek: ἔκτασις, romanized: éktasis, meaning "extension") is the second geologic period in the Mesoproterozoic Era and lasted from 1400 Mya to 1200 Mya (million years ago). Instead of being based on stratigraphy, these dates are defined chronometrically.
The findings are the latest evidence indicating the existence of this hypothesized ocean, called Deuteronilus, roughly 3.5 to 4 billion years ago, a time when Mars - now cold and desolate ...
Ancient giant stromatolites used to be widespread in Earth’s Precambrian era, which encompasses the early time span of around 4.6 billion to 541 million years ago, but now they are sparsely ...
The Aquitanian Stage was named after the Aquitaine region in France and was introduced in scientific literature by Swiss stratigrapher Karl Mayer-Eymar in 1858.. The base of the Aquitanian (also the base of the Miocene Series and the Neogene System) is defined as the place in the stratigraphic column at the first appearance of foram species Paragloborotalia kugleri, the extinction of ...
The Toarcian is, in the ICS' geologic timescale, an age and stage in the Early or Lower Jurassic.It spans the time between 184.2 Ma (million years ago) and 174.7 ±0.8 Ma. [4]
[4] Rafatazmia, controversially [5] claimed to be present in Statherian beds in India, may be the oldest known confirmably eukaryotic fossil organism. [6] By the beginning of the Statherian, the supercontinent Columbia had assembled. [7] Approximately 1.7 billion years ago, natural nuclear fission reactors were generating power in what is now ...
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1991 [1] The Mesoproterozoic Era [ 4 ] is a geologic era that occurred from 1,600 to 1,000 million years ago . The Mesoproterozoic was the first era of Earth's history for which a fairly definitive geological record survives.