I want to study the geology of the Great Flood of Noah. Can anyone define the sediment contact boundaries?

Very likely the "Great Flood" was caused by the rupture of what is now called the Strait of Bosporus. That would make the sediment contact boundaries the bottom and the shore of the Black Sea. There is marine archaeological evidence of human habitation hundreds of feet below the Black Sea's surface, which is now at sea level. The people who lived there would surely have imagined the whole world had flooded. Mt. Ararat rises opposite the Strait of Bosporus, near the Black Sea's eastern shore.