Fig. 3
From: Report on ammonoid soft tissue remains revealed by computed tomography
Geochemical composition of the originally aragonitic shell and the surrounding rock material from specimen RUB-Pal 11287, a, c both show relics of the original tablet microstructure (arrows), b shows a quartz grain coated with a fluorapatite crust, d EDS spectrum from the phosphate collected in the area show in C (star), e EDS spectrum collected from the crust shown in B (star)