Figure 2
From: Early Evidence for Northern Salmonid Fisheries Discovered using Novel Mineral Proxies
Whitlockite and beta magnesium tricalcium phosphate minerals documented exclusively in the infrared spectra of archaeological Atlantic salmonid bone. v3 and v4 phosphate infrared absorbance bands for modern Atlantic salmonid (A) Atlantic salmonid vertebrae from the archaeological sites of Nilsiä Lohilahti (B), Yli-Ii Purkajasuo Korvala (C), and Kuivaniemi Veskankangas (D), followed by comparative specimens of archaeological whitefish (E), northern pike, (F), reindeer (G), and seal (H). Wavenumbers (cm−1) for each absorbance band are specified. Bands for whitlockite and beta magnesium tricalcium phosphate are labelled in red. Abbreviations: PO4 = phosphate; HAp = hydroxylapatite; HPO4 = hydrogen phosphate; CO3 = carbonate; OH = hydroxyl; WH = whitlockite; TCP = beta magnesium tricalcium phosphate.
