Table 4: Chemical compositions (XRF) of pottery sherds.

Oxides Concentrations of elemental oxides (%)
UMR-01 UMR-02 UMR-03 KDR SH-01 SH-02 SH-03
SiO2 56.855 57.388 54.441 58.671 64.952 62.125 53.743
Al2O3 20.470 16.207 18.632 16.530 15.221 14.506 17.62
Fe2O3 11.406 11.433 15.079 13.136 9.803 11.083 14.154
K2O 5.179 1.749 1.013 2.711 2.528 1.749 2.196
CaO 3.271 3.867 3.296 2.589 2.902 3.014 4.210
TiO2 1.309 2.241 1.629 1.919 2.096 3.014 2.017
Mn2O3 0.077 0.234 0.153 0.230 0.235 0.218 0.206
MgO 0.765 2.472 2.543 1.848 1.112 1.714 1.819
SO3 0.329 1.755 1.147 0.739 0.717 1.001 2.014
Na2O 0.068 0.105 0.180 0.047 0.047 0.204 0.398
P2O5 0.156 1.985 1.439 0.0794 0.769 0.502 0.996
Cl 0.284 0.455 0.389 0.298 0.188 0.510 0.546