Fig. 3 in The gaudryceratid ammonoids from the Upper Cretaceous of the James Ross Basin, Antarctica

Fig. 3. Biostratigraphy of Anagaudryceras in the Sanctuary Cliffs Member, Snow Hill Island Formation, Antarctica, early Maastrichtian (A) and the López de Bertodano Formation, Seymour Island, late Maastrichtian (B). Ammonite assemblages by Olivero (2012b), magnetostratigraphic correlation for the Snow Hill Island Formation by Milanese et al. (2017a, b) and for the López de Bertodano Formation by Tobin et al. (2012). Abbreviations: A., Anagaudryceras; Ass., ammonite assemblage; Fm., Formation; G, gravel; M, mud; S, sand; Sst., sandstone.