Fossilized wood. Sequential artwork of the formation of fossilized (petrified) wood. Petrified wood forms over many thousands of years. The petrification process begins when a tree falls into water or mud (upper left). The minerals in the wood are gradually replaced by minerals from the water or mud,which solidify into stone,usually a type of quartz. The petrified wood may remain underground,or may eventually be exposed by erosion of the surrounding material (lower right). The largest concentration of petrified wood is in Petrified Forest National Park in Arizona,USA,where logs of 60 metres in length and 3 metres in diameter have been found | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Hks, Gary |
Taille de l’image : | 5520 px × 3606 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |