Table 1. Compositional results for the eggshell and pore inclusions as determined by micro-PIXE technique. The remaining percentage includes oxygen and carbon.

%w	eggshell	pore inclusions
Na	0.09	0.6
Mg	0.33	1.9
Al	0.09	11.6
Si	0.10	25.2
P	n.d.	0.07
S	0.08	0.09
Cl	0.02	0.08
K	0.03	2.4
Ca	39.4	6.0
Ti	n.d.	0.4
Mn	0.18	0.03
Fe	0.27	3.6