Scanning electron micrograph (SEM) of Coal from the ship Titanic. Coal is a fossil fuel (combustible sedimentary rock) that forms when dead plant matter is converted into peat. Over time geological processes convert peat into lignite, then sub-bituminous coal, then bituminous coal, and finally anthracite. Magnification: x535 when shortest axis printed at 25 millimetres. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / DENNIS KUNKEL MICROSCOPY |
Bildgröße: | 2917 px × 3403 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |