Did a catastrophic flood of biblical proportions drown the shores of the Black Sea 9,500 years ago, wiping out early Neolithic settlements around its perimeter ?
A geologist with the Woods Hole Oceanographic Institution (WHOI) and two Romanian colleagues report in the January issue of Quaternary Science Reviews that, if the flood occurred at all, it was much smaller than previously proposed by other researchers.
Using sediment cores from the delta of the Danube River, which empties into the Black Sea, the researchers determined sea level was approximately 30 meters below present levels—rather than the 80 meters others hypothesized.
“We don’t see evidence for a catastrophic flood as others have described,” said Liviu Giosan, a geologist in the WHOI Geology and Geophysics Department.
Ten thousand years ago, at the end of the last glacial period, the Black Sea was a lake—cut off from the Sea of Marmara and beyond it the Mediterranean by the Bosphorus sill.
Debate in geological and archaeological circles has focused on whether, as glaciers melted and global sea levels began to rise, the Bosphorus sill overflowed gradually or whether a flood broke through the sill, drowning some 70,000 square kilometers and wiping out early Neolithic civilizations in the region.
In addition to questions about the rate of the flood, investigators continue to debate the extent of the flood -- a debate centered around what the level of the Black Sea was 9,500 years ago.
In the late 1990s, Columbia University researchers Bill Ryan and Walter Pitman examined the geological evidence and estimated the Black Sea level at the time of the flood was approximately 80 meters lower than present day levels.
They suggested that the impact of a Black Sea flood could have forced the movement of early agriculturist groups to central Europe and established the story of Noah and his ark, as well as flood myths among other peoples.