Table 2. Mass percentage of chemical elements detected by Energy Dispersive X-ray analysis on selected spots of the Fumane Aspa marginata .

		Spot
	a	b		c
Element	(Wt%)	(Wt%)		(Wt%)
C	12.23
O	42.01	46.71		37.81
Mg	1.73
Al	0.41	0.55		1.02
Si	1.93	1.81		3.00
P				1.98
Ca	41.70	50.32		11.99
Fe				44.19

a: outer shell surface, b: broken crystals on the edge of the micropit shown in Figure 7d, c: red substance filling the pit (Figure 7c).