Fig. 1
Summary geological maps. (A) The general location of the South China block in the Early Triassic (modified from Benton et al. [24]). (B) Tectonic map showing major blocks of South China [24], with the site of Nanzhang-Yuan’an Fauna (NYF). (C) Simplified geological map of Nanzhang and Yuan’an counties with distributions of Triassic marine reptiles (modified from Li et al. [16] and Yan et al. [22]). ‘Old land’ is coloured orange, shallow seas light blue, and deep marine basins dark blue in A, B. Abbreviations: Є-S, Cambrian-Silurian; D-P, Devonian-Permian; T1d, Daye Formation, Lower Triassic; T1j, Jialingjiang Formation, Lower Triassic; T2b, Badong Formation, Middle Triassic; T3-J, Upper Triassic-Jurassic; K-Q, Cretaceous-Quaternary.