Sentences with phrase «old seafloor sediments»
Trapped in old seafloor sediments, the water is more than 100 million years old and twice as salty as modern seas
http://www.sciencemag.org/ Not exact matches
In addition to methane hydrates, carbon - rich permafrost that is tens of thousands of years old — and found throughout the Arctic on land and in seafloor sediments — can produce methane once this material thaws in response to warming.
Our results overturn a 60 - year - old conclusion that the depth limit to life is in the sediment just meters below the seafloor in such regions.