Carbon and nitrogen isotope values from bone collagen of Mediterranean late Upper Palaeolithic (17–11 ka cal BP) and Mesolithic (10-8 ka cal BP) humans.

(*)the C/N ratios of the human bone collagen from Grotta dell’Uzzo are at the limit for well-preserved collagen ( = 3.6). In the absence of other published data on the quality of the collagen (%C, %N, %yield) analysed by Francalacci [5], the isotope ratios of these individuals should be considered with caution. The low δ13C values might, in fact, be due to contamination.
(**)the standard deviation could not be calculated because the raw data was not published by Paine et al. [6].