Figure 3. X-ray photoelectron spectra of iron in a pottery shard from Crooked Island, Bahamas.

(a) FeO (solid line) and Fe₂O₃ (+ line), and (b) spectra of iron in the pottery, both observed (solid line) and simulated (+ line) for 64% Fe₂O₃ and 36% FeO. (Adapted with permission from Ref. 15.)