| The fossilization process known as petrifaction usually begins when a tree or log is buried in silica-rich, alkaline volcanic ash or mud. |
| The probability of fossilization is investigated by taphonomists and geologists, who have concluded that it usually is very low. |
| Only the final peristomeal differentiations, with fragile lappets, may disappear during fossilization. |
| The party Polaroid is not so much an evocation of a past event as it is an instant fossilization of the present. |
| This may not be fossilization as we know it, of large macrostructures, but fossilization at a molecular level. |
| The complexity of the fossilization process is reflected in the presence of different textures in adjacent cells of the same tissue. |
