Some of the upper layers of rock deposits contain small amounts of shale or slate of dark colors, indicating the presence of organic carbon and testifying to the existence of the ancestors of those forms of plant life which overran the earth during the Carboniferous or coal age. [1]
Much of the carbon of the atmosphere was abstracted to form the carbonates. Later on, much greater quantities of these carbon gases were consumed by the early and prolific plant life. [2]
In those suns which are encircuited in the space-energy channels, solar energy is liberated by various complex nuclear-reaction chains, the most common of which is the hydrogen-carbon-helium reaction. In this metamorphosis, carbon acts as an energy catalyst. [3]