Monferran et al.—Chemical taphonomy of Jurassic spinicaudatans from Patagonia, Argentina 92(6):1054–1065 1059
Figure 2. Energy-dispersive X-ray spectrometry (EDS) analysis of an E. taschi carapace (CTES-PZ –7.678) and rock matrix. (1) General view of the carapace; (2) EDS comparison of general EDS spectra of carapace and sediment; (3) points analyzed in the anterodorsal zone—white horizontal line indicates the approximate transect position used for monitoring trends in elemental distributions by EDS; (4) points analyzed in ventral zone—white vertical line indicates the approximate transect position used for elemental analysis by EDS. (1) Scale bar=1mm; (3, 4) scale bar=100 μm.
or their trace elements. However, the phosphatic mineralization frequently found in carapaces is present, suggesting some diagenetic recrystallization. This is the case for our studied specimens.
On the other hand, there are differences in chemical
composition and concentration between E. taschi and C. disgregaris carapaces. The Ca and P contents are much greater in C. disgregaris carapaces, while other chemical elements are
