Figure 5.6: Detail of the aragonitic layer, in the shape of tiles, also known as the Nacreous Layer.
Figure 5.7: Detail of the aragonitic layer, in the shape of tiles, also known as the Nacreous Layer.
Figure 5.8: Separation between the nacreous (N)and prismatic (P) layers.
Eventually, along the nacreous layer, isolated insertions of the prismatic layer can be observed in the form of discontinuous bands. Known as mesolayers, these insertions are probably related to momentary interuptions in the production of the nacreous layer, probably owing to a reduction in environmental nutrients.
Figure 5.9: Detail of the aragonitic layer with prismatic morphology (P) between two bands in the nacreous layer (N).
Figure 5.10: Detail of the aragonite layer with prismatic morphology (P) between two bands of nacreous layer (N) – mesolayer.
