Skip to main content
Heritage Science
Fig. 7 | Heritage Science

Fig. 7

From: A Raman micro-spectroscopy study of 77,000 to 71,000 year old ochre processing tools from Sibudu, KwaZulu-Natal, South Africa

Fig. 7

a Photographs of the two sides of the flat grindstone recovered from layer BS13 (square C4a); b, c micro-photographs showing examples of red residues and d characteristic Raman spectra obtained on the grindstone: (A) amorphous carbon, (B) mixture of haematite and maghemite, (C) mixture of anatase, quartz and amorphous carbon, (D) phosphate and (E) goethite

Back to article page