Editing Cambrian (section)

==== Ganderia, East and West Avalonia, Carolinia and Meguma Terranes ====
The terranes of [[Ganderia]], East and West [[Avalonia]], [[Carolina terrane|Carolinia]] and [[Meguma terrane|Meguma]] lay in polar regions during the early Cambrian, and high-to-mid southern [[latitude]]s by the mid to late Cambrian.<ref name="Domeier-2016" /><ref name="Keppie-2024"/> They are commonly shown as an island arc-transform fault system along the northwestern margin of Gondwana north of northwest Africa and Amazonia, which rifted from Gondwana during the Ordovician.<ref name="Domeier-2016" /> However, some models show these terranes as part of a single independent [[Continental fragment|microcontinent]], Greater Avalonia, lying to the west of Baltica and aligned with its eastern ([[Timanide Orogen|Timanide]]) margin, with the Iapetus to the north and the Ran Ocean to the south.<ref name="Keppie-2024"/>
[[File:Gondwana, China and Siberia.png|thumb|Approximate positions of Siberia, Gondwana, North and South China, Baltica and smaller terranes in the middle Cambrian (c. 500 Ma). AN: Annamia, CM: Central Mongolian terrane, JA: Japan arc, KHT: Kazakhstania terranes, MOO: Mongol-Okhotsk Ocean, NC: North China, QT: Qinling terrane, SC: South China, TA: Tarim microcontinent, VT: Variscan terranes. Plate boundaries: red - subduction; white - ridges; yellow - transform.<ref name="Torsvik-2017" /><ref>{{Cite journal |last=Domeier |first=Mathew |date=2018-05-01 |title=Early Paleozoic tectonics of Asia: Towards a full-plate model |url=https://www.sciencedirect.com/science/article/pii/S1674987117302074 |journal=Geoscience Frontiers |series=Greenstone belts and their mineral endowment |volume=9 |issue=3 |pages=789–862 |doi=10.1016/j.gsf.2017.11.012 |bibcode=2018GeoFr...9..789D |issn=1674-9871|hdl=10852/71215 |hdl-access=free }}</ref> |alt=Paleogeographic map showing Gondwana close to the south pole, Siberia, North and South China near the equator and Baltica to the south of Siberia.]]