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Gas hydrate has been known to chemists since the early 1800s, but in the 1960s geologists were the first to recognize it as naturally occurring....


= Encyclopedia Article; = Research Update
Figure 1.Gas hydrate structure. The rigid cages are composed of hydrogen-bonded water molecules, and each cage, both exposed and covered, contains a molecule of methane (CH4).
From update 'Gas hydrate'
Figure 2.Locations of known and inferred gas hydrate in aquatic (mostly oceanic) sediments [circles] and in continental (polar) regions [squares].
From update 'Gas hydrate'
Figure 3.Distribution of organic carbon (in units of 1015 g of carbon, or gigatons) in the Earth (excluding dispersed organic carbon such as kerogen and bitumen, which equals nearly 1000 times the amount of organic carbon in the diagram).
From update 'Gas hydrate'
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