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Is Genesis' flood story scientifically possible?


The biblical story is similar to a much older Mesopotamian flood story in the epic of Gilgamesh. recently scientists have started to uncover evidence that Noah's flood may have a basis in some rather astonishing events that took place around the Black Sea some 7,500 years ago.

This was a time when the earth looked very different from what we are used to today. Thick ice sheets extended down from the North Pole as far as Chicago and New York City. All that water had to come from somewhere, so ocean levels were about 400 feet lower than they are today. In essence, water that evaporated from the oceans fell as snow (which was compacted into glacial ice) rather than rain (which would flow back and replenish the oceans as it does now). The East Coast of the United States was 75 to 150 miles farther out than it is today, and places like Manhattan and Baltimore would have been inland cities.

During this period, meltwater from the European glaciers flowed down to the Black Sea basin, then out through a river channel into the Mediterranean. Because the Mediterranean is connected to the world ocean at Gibraltar, it was also 400 feet lower than it is today, so this flow of fresh water through the Black Sea was downhill.

The idea that ocean basins can flood catastrophically during periods of rising sea levels is nothing new in geology. Five million years ago, long before there were any humans around, just such an event occurred. The level of the Atlantic Ocean had dropped, or some tectonic event had occurred, with the result that water could no longer get through, and the Mediterranean gradually shrank down to a desert spotted with a few salty bits of ocean. Subsequently, when either the Atlantic rose again or another geological change took place, ocean water began pouring back into the former sea.

The basin filled, and the present-day Mediterranean was created. We know such things because sediments reveal history.

Carbon-dating of shells in this mud indicates that it was laid down between 18,000 and 8,600 years ago. This data showed that an area of the Black Sea about the size of Florida might have been much like the lower Mississippi Delta today — rich farmland with an abundant supply of fresh water.

Directly above the layers of mud is a layer of "shell hash" — an inch-thick layer of broken shells — overlain by several feet of fine sediment of the type being brought into the Black Sea by rivers today. The shells in the "hash" are typical of what was in the Black Sea when it was a body of fresh water. The fine sediments contain evidence of saltwater species previously unknown in the Black Sea. It is the interpretation of these layers that tells us what happened on that inevitable day when rising sea levels in the Mediterranean reached the base of the sediments at the bottom of the Bosporus — and all hell broke loose.

When the Mediterranean began to flow northward, it "popped the plug" and pushed those sediments into a "tongue" of loose sediment on the bottom of what would become the present-day Black Sea (this tongue can still be seen in cores taken from the ocean bottom in that area). As the flow of water increased, it began to cut into the bedrock itself. The rock in this area is broken "trashy" and even today rockslides are a major engineering problem for roads cut into the cliffs alongside the Bosporus.

The incoming water eventually dug a channel more than 300 feet deep as it poured into the Black Sea basin, changing it from a freshwater lake to a saltwater ocean. In this scenario, the mud beneath the shell hash represents sediments from the rivers that fed the freshwater lake, the shell hash the remains of the animals that lived in that lake, and the layers above it the result of the saltwater incursion.

It was this event that could be the flood that is recorded in the Book of Genesis. The salt water poured through the deepening channel, creating a waterfall 200 times the volume of Niagara Falls (anyone who has ever traveled to the base of the falls on the Maid of the Mist will have a sense of the power involved). In a single day enough water came through the channel to cover Manhattan to a depth at least two times the height of the World Trade Center, and the roar of the cascading water would have been audible at least 100 miles away. Anyone living in the fertile farmlands on the northern rim of the sea would have had the harrowing experience of seeing the boundary of the ocean move inland at the rate of a mile a day.

Archaeologists at the Smithsonian who study ancient civilizations have known for a long time: that at roughly the time of the flood, a number of people and new customs suddenly appeared in places as far apart as Egypt and the foothills of the Himalayas, Prague and Paris. The people included speakers of Indo-European, the language from which most modern European and Indian languages are derived. These people might, in fact, represent a diaspora of Black Sea farmers who were driven from their homes by the flood, and that the flood itself might have been the cause of the breakup of Indo-European languages.

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