Siderian
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The Siderian is the first geologic period in the Paleoproterozoic Era and Proterozoic Eon. It lasted from 2500 to 2300 million years ago, spanning 200 million years, and is followed by the Rhyacian Pe
A Siderian banded iron formation in Dales Gorge, Western Australia
Artist's impression of the Earth during the Huronian glaciation, starting from the mid-Siderian
Gray Badcallian gneiss (c. 2500 Ma) intruded by a dark amphibolitic Scourie dike (c. 2400 Ma), both intruded by younger granitic veins
Paleoproterozoic
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The Paleoproterozoic Era is the first of the three sub-divisions of the Proterozoic eon, and also the longest era of the Earth's geological history, spanning from 2,500 to 1,600 million years ago. It
Siderian
…The Siderian ( ) is the first geologic period in the Paleoproterozoic Era and Proterozoic Eon. It lasted from 2500 to 2300 million years ago (Ma), spanning 200 million years, and is followed by the Rhyacian Period. Instead…
Paleoproterozoic stromatolites