Figure 1. Top: a section of the excavation at Cardina I, showing the distribution of ceramics. Their occurrence in three of the four main strata indicates that the microliths found with them are probably Neolithic, except in the lowest quarter of the sequence, where the lithics might be Mesolithic. Bottom: Four typical sediment columns at Quinta da Barca, indicating that ceramics begin right from the basal rock, so these sediments are presumably of the second half of the Holocene. (After Aubry, Carvalho and Zilhão 1997.)