Once Noah had done this, it rained for 40 days and 40 nights. After 7 months and 17 days the waters receded, according to Genesis, and the ark came to rest on the mountains of Ararat.
Most Bible scholars have interpreted this to refer to Mount Ararat in eastern Turkey. (See Turkey map.)
But this location doesn't fit the description given in Genesis of the ark's passengers journeying from the east to arrive at Mesopotamia.
Cornuke and his team think that Mount Ararat might be a red herring.
"The Bible gives us a compass direction here, and it is not in the direction of Turkey. Instead it points directly towards Iran," Cornuke said.
Using the Book of Genesis and other literary sources, the BASE team journeyed to Iran in July 2005 to climb Mount Suleiman.
They chose Mount Suleiman after reading the notes of 19th-century British explorer A. H. McMahan.
In 1894, after climbing Mount Suleiman, McMahan wrote in his journal, "According to some, Noah's ark alighted here after the deluge."
McMahan also spoke of wood fragments from a shrine at the top of the mountain where unknown people had made pilgrimages to the site.
"We found a shrine and wood fragments at 15,000 feet [4,570 meters] elevation, as described by McMahan," Cornuke said.
Subsequent carbon dating of samples from the shrine showed the wood fragments from the site to be around 500 years old.
Lower on the mountain, expedition members came across the ark-like rock formation, which they estimate to be about 400 feet (122 meters) long.
Rocks From the Sea?
Not everyone is convinced by the BASE team's claims.
Kevin Pickering, a geologist at University College London who specializes in sedimentary rocks, doesn't think that the ark-like rocks are petrified wood.
"The photos appear to show iron-stained sedimentary rocks, probably thin beds of silicified sandstones and shales, which were most likely laid down in a marine environment a long time ago," he said.
Pickering thinks that the BASE team may have mistaken the thin layers in the sediment for wood grain and the more prominent layers as beams of wood.
"The wider layers in the rock are what we call bedding planes," he said.
"They show fracture patterns that we associate with the Earth processes that caused the rocks to be uplifted to their present height."
The boat-shaped structure can also be explained geologically, says retired British geologist Ian West, who has studied Middle Eastern sediments.
"Iran is famous for its small folds, many of which are the oil traps. Their oval, ark-like shape is classical," he said.
Meanwhile, ancient timber specialist Martin Bridge, of England's Oxford Dendrochronology Laboratory, is doubtful that a wooden structure would have lasted long enough to petrify under ordinary conditions.
"Wood will only survive for thousands of years if it is buried in very wet conditions or remains in an extremely arid environment," he said.
Bible scholars think that Noah built his ark somewhere between 6,000 and 10,000 years ago, making preservation highly unlikely except in extreme environmental conditions.
And even if the wood had petrified, there seems to be little evidence of Noah's carpentry, according to Robert Spicer, a geologist at England's Open University who specializes in the study of petrification.
"What needs to be documented in this case are preserved, human-made joints, such as scarf, mortice and tenon, or even just pegged boards. I see none of this in the pictures. It's all very unconvincing," Spicer said.
Bridge, the Oxford timber specialist, points out that it would also be impossible for a boat to run aground at 13,000 feet.
"If you put all the water in the world together, melting both the ice caps and all the glaciers, you still wouldn't reach anywhere near the top of the mountain," he said.
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