Fig. 2From: Oak wood degradation processes induced by the burial environment in the archaeological site of Biskupin (Poland)H/L, C/L and C/H ratios obtained from wet chemical analysis of oak reference wood (ref) and the wood samples after 2, 4, 6, 8 and 10 years of burial in: a SP4 (water sediment), and b SP4 (wet peat)Back to article page