Sentences with phrase «fossil mussel shells»
Fossil mussel shells excavated more than a century ago at an H. erectus site on the Indonesian island of Java include a shell with engravings of an M shape, two parallel lines and a reversed N shape, the scientists report December 3 in Nature.
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The rate of decline in mussel shell δ13C from 1999 − 2009 was faster than can be explained by equilibration with the rising CO2 concentration of the atmosphere and the increasing contribution of isotopically light fossil fuel carbon (the Suess effect).