The Siderian Period (/ s aɪ ˈ d ɪər i. ə n, s ɪ-/; Ancient Greek: σίδηρος, romanized: sídēros, meaning "iron") is the first geologic period in the Paleoproterozoic Era and lasted from 2500 Ma to 2300 Ma. Instead of being based on stratigraphy, these dates are defined chronometrically.

The Siderian is the first period of the Paleoproterozoic Era, occurring after the Neoarchean, and before the Rhyacian. "Siderian" refers to iron, which was prominent in banded iron-formations of this time

The Siderian is the first geological period in the Palaeoproterozoic that began 2.5 billion years ago, and ended at 2.3 billion years ago. Before it was the Neoarchaean It is followed by the Rhyacian. Banded iron formations (BIFs) became very abundant early this period.

It is further subdivided into four geologic periods, namely the Siderian, Rhyacian, Orosirian and Statherian. Paleontological evidence suggests that the Earth's rotational rate ~1.8 billion years ago equated to 20-hour days, implying a total of ~450 days per year. [ 5 ]

The Siderian It is the age of increased level of atmospheric oxygen, bio diversity, and rise of continents, huronian glaciations, and mineral diversity. Siderian Period lasted from 2, 5000 to 2, 3000 million years ago and is one of the major division of the Proterozoic Era.

The Siderian Period (/ s aɪ ˈ d ɪər i. ə n, s ɪ-/; Ancient Greek: σίδηρος, romanized: sídēros, meaning "iron") is the first geologic period in the Paleoproterozoic Era and lasted from 2500 Ma to 2300 Ma.

The Siderian Period 2500-2300 MYA Climate: At the beginning of the Period it was 21.1 degrees Celcius and at the end, it was 5 degrees Celcius Major Events: Severe Glaciation known as the Huronion Glaciation. Plants: There were no plants in this time period. Animals: Anaerobic bacteria, Stromatolites, and Cyanobacteria

The Siderian Period is the second, and final, period of the Neoarchean Era, and the sixth, and final, period of the Archean Eon. The Siderian begins with the first appearance of the Hamersley...

Siderian Archean Neoarchean Mesoarchean Paleoarchean Eoarchean Hadean Early Imbrian Nectarian Basin Groups Cryptic. Chaotian Neochaotian Titanomachean Hyperitian Eochaotian Erebrean Nephelean. Prenephelean (Presolar) Hierarchy: Precambrian Proterozoic Paleoproterozoic ...

Siderian adjective. Of a geologic period within the Paleoproterozoic era from about 2500 to 2300 million years ago. Siderian noun. The Siderian period.