Petrified wood (from the Greek root petro meaning "rock" or "stone"; literally "wood turned into stone") is the name given to a special type of fossilized remains of terrestrial vegetation. It is the result of a tree or tree-like plants having completely transitioned to stone by the process of permineralization. All the organic materials have been replaced with minerals (mostly a silicate, such as quartz), while retaining the original structure of the stem tissue. Unlike other types of fossils which are typically impressions or compressions, petrified wood is a three-dimensional representation of the original organic material. The petrifaction process occurs underground, when wood becomes buried under sediment and is initially preserved due to a lack of oxygen which inhibits aerobic decomposition. Mineral-laden water flowing through the sediment deposits minerals in the plant's cells; as the plant's lignin and cellulose decay, a stone mould forms in its place.
In general, stem tissue takes less than 100 years to petrify. The organic matter needs to become petrified before it decomposes completely. A forest where such material has petrified becomes known as a petrified forest.
Read more about Petrified Wood: Elements, Locations, Artificial Petrified Wood
Famous quotes containing the words petrified and/or wood:
“In spite of his practical ability, some of his experience had petrified into maxims and quotations.”
—George Eliot [Mary Ann (or Marian)
“It would be as wise to set up an accomplished lawyer to saw wood as a business as to condemn an educated and sensible woman to spend all her time boiling potatoes and patching old garments. Yet this is the lot of many a one who incessantly stitches and boils and bakes, compelled to thrust back out of sight the aspirations which fill her soul.”
—Sarah M. Grimke (1792–1873)