(Radtke et al., 2002). A sample of well preserved Dolium (Tonna)
galea gave an ESR signal of some hundred
years as maximum, but older than modern. This would well fit into the 18th century as does the
vegetation scar north of Guincho beach. A radiocarbon datum of 2440 +-50 BP from Patella sp. north
of Cabo Raso at +12 m asl definitely hints at an older strong tsunami impact. It is highly likely that it
was the same tsunami which was identified by Luque et al. (2001) in southern Spain, most probably
from the years 218 or 216 BC, which were mentioned in older texts. The ESR signal from this
sample was the same than that of another one from north of Guincho beach at +30 m asl. They
certainly are of the same age, and by this we have two sites with older historical tsunami data. One
sample of Patella from south of Guincho Beach at +14 m asl gave ESR signals about 2.5 times older
than those from 2440 BP