In the late Neoproterozoic-Cambrian, the South China Craton was situated off northeast India 97 , 99 , 100 , 101 (Fig. 8 a). The Ordovician–Silurian strata in South China contain ca. 490 Ma exotic zircons 102 that were likely derived from the Bhimphedian (530–470 Ma) and Ross-...