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The earliest traces of life on Earth—researchers explore carbon in 3.9-billion-year-old Canadian rocks
The study shows that the petrographic, geochemical and spectroscopic features in the graphite (the crystalline form of carbon) found in the Saglek-Hebron chemical sedimentary rocks are in fact ...
Nature10d
Variations in the Crystalline Form of Calcium Carbonate precipitated from Artificial Sea Water
the form in which calcium carbonate would be expected to precipitate from sea-water. It has been pointed out, however, that when carbon dioxide was removed from natural sea-water a precipitate of ...