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Legh. Very interesting article and makes you realise how little we understand. I was aware of the hydrate deposits and that has been known about for a long time and had been of concern with regard to the possible impact of release into the atmosphere. What is interesting is the rapidity (in Geological timescales) of the changes although put in to perspective the present rates are worrying. 

With regard to plate tectonics it's not really a case of large rocks bumping in to each other. The plates either via spreading zones or subduction zones are the root source of most hydrothermal and other volcanic activity, with mantle hotspots (not well understood) accounting for the other vulcanic activity such as Hawaii and Galapagos Islands. Plate tectonics revolutionised our understanding of earth science in the 1960's. Even though Wegener's continental drift theories were the precursor many "experts" ridiculed him at the time as is often the case with new ideas!

Cheers Andy

Legh. Very interesting article and makes you realise how little we understand. I was aware of the hydrate deposits and that has been known about for a long time and had been of concern with regard to the possible impact of release into the atmosphere. What is interesting is the rapidity (in Geological timescales) of the changes although put in to perspective the present rates are worrying. 

With regard to plate tectonics it's not really a case of large rocks bumping in to each other. The plates either via spreading zones or subduction zones are the root source of most hydrothermal and other volcanic activity, with mantle hotspots (not well understood) accounting for the other vulcanic activity such as Hawaii and Galapagos Islands. Plate tectonics revolutionised our understanding of earth science in the 1960's. Even though Wegener's continental drift theories were the precursor many "experts" ridiculed him at the time as is often the case with new ideas!

Cheers Andy