Light micrograph of a section of coal showing fragments of a fossilised leaf (yellow strands) trapped within the dark,vegetative material. Coal formation occurs when peat or some other type of partially decayed vegetable matter is compacted and heated during burial. This process of coalification produces the familiar black,rock- like substance burnt as fossil fuel. Magnification: x40 at 35mm size | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Durham, John |
Taille de l’image : | 3803 px × 2516 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |