Editing Cambrian (section)

=== South China and Annamia ===
South China and Annamia formed a single continent. Strike-slip movement between it and Gondwana accommodated its steady drift northwards from offshore the Indian sector of Gondwana to near the western Australian sector. This northward drift is evidenced by the progressive increase in [[limestone]]s and increasing [[fauna]]l diversity.<ref name="Torsvik-2017" />

The northern margin South China, including the South Qinling block, was a passive margin.<ref name="Torsvik-2017" />

Along the southeastern margin, lower Cambrian volcanics indicate the accretion of an island arc along the Song Ma suture zone. Also, early in the Cambrian, the eastern margin of South China changed from passive to active, with the development of oceanic volcanic island arcs that now form part of the [[Geology of Japan|Japanese terrane]].<ref name="Torsvik-2017" />