19 million-year-old wood chips were found in sediment layers in the Bay of Bengal.
, the team argues that trees within an ancient forest were uprooted by a huge release of water—potentially by a natural dam created by a glacier or a landslide. These trees would have then been transported for thousands of miles along a huge surge of water—from cyclones, monsoons or floods, the scientists suggest—before being released in the Bengal Fan.
Carbon stored in plants is released when it is eaten, decays or is burned. Because the trees were transported shortly after being uprooted—the point of death—they did not decompose. Instead, the fresh wood was locked into the seafloor sediment—potentially representing a previously unrecognized means by which carbon can be stored for millions of years.
Understanding how much carbon may be locked away as a result of forests being washed into the ocean is important in understanding future climate change, Fearkins said."As we've tried to calculate the amount of carbon in all parts of the carbon cycle, we didn't know about this forest of fragmented trees buried in the ocean floor," she said in a statement."Now we need to add it to the equation.
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