Definition of Siderian. Meaning of Siderian. Synonyms of Siderian

- The Siderian Period ( /saɪˈdɪəri.ən, sɪ-/; Ancient Gr****: σίδηρος, romanized: sídēros, meaning "iron") is the first geologic period in the Paleoproterozoic...
- 6 Ga). It is further subdivided into four geologic periods, namely the Siderian, Rhyacian, Orosirian and Statherian. Paleontological evidence suggests...
- Kratian (no fixed time given, prior to the Siderian) – from Gr**** word κράτος (krátos), meaning strength. Siderian (?–2450 Ma) – moved from Proterozoic to...
- extended from approximately 2.5 to 2.2 billion years ago (Gya), during the Siderian and Rhyacian periods of the Paleoproterozoic era. Evidence for glaciation...
- which produced the 300 million years-long Huronian glaciation (during the Siderian and Rhyacian periods of the Paleoproterozoic) and the hypothesized Snowball...
- Great Oxygenation Event, produced by the proliferation of algae during the Siderian period, required about 300 million years to culminate. The present era...
- Ga) Calymmian (1.4–1.6 Ga) Paleoproterozoic (1.6–2.5 Ga) Statherian (1.6–1.8 Ga) Orosirian (1.8–2.05 Ga) Rhyacian (2.05–2.3 Ga) Siderian (2.3–2.5 Ga)...
- Further chemical and isotopic analysis of ancient rock reveals that by the Siderian period, roughly 2.45 billion years ago, oxygen had appeared. This indicates...
- bacteria and algae. c. 2,500 Ma – Proterozoic Eon, Paleoproterozoic Era, and Siderian Period start. Oxygen saturation in the oceans is reached: Banded iron formations...
- Eoarchean Paleoarchean Mesoarchean Neoarchean Proterozoic Paleoproterozoic Siderian Rhyacian Orosirian Statherian Mesoproterozoic Calymmian Ectasian Stenian...