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Tree remains that have undergone petrifaction, as seen in Petrified Forest National Park. In geology, petrification (from Ancient Greek πέτρα (pétra) 'rock, stone') is the process by which organic material becomes a fossil through the replacement of the original material and the filling of the original pore spaces with minerals.
Large, upright trunks complete with root systems can be found, as well as trunks up to 22 m in length. Italy: Foresta fossile di Dunarobba, petrified forest near Avigliano Umbro, Umbria (Central Italy), age Piacenzian. Foresta pietrificata di Zuri – Soddì, petrified forest near Soddì (Province of Oristano, Sardinia), age Chattian–Aquitanian.
Petrification is associated with the legends of Medusa and the Svartálfar among others. In fairy tales, characters who fail in a quest may be turned to stone until they are rescued by the successful hero, as in the tales such as The Giant Who Had No Heart in His Body, The Water of Life and The Dancing Water, the Singing Apple, and the Speaking Bird, as well as many troll tales.
Root mucilage is made of plant-specific polysaccharides or long chains of sugar molecules. [1] [2] This polysaccharide secretion of root exudate forms a gelatinous substance that sticks to the caps of roots. [3] Root mucilage is known to play a role in forming relationships with soil-dwelling life forms.
If an object is placed into such a well and left there for a period of weeks or months the object acquires a stony exterior. At one time this property was believed to be a result of magic or witchcraft, but it is an entirely natural phenomenon and due to a process of evaporation and deposition in waters with an unusually high mineral content.
Botox also has other FDA-approved uses: It can help treat migraines, muscular dystonias, a neurogenic bladder and a few other medical conditions, she says.
According to the New York Times, here's exactly how to play Strands: Find theme words to fill the board. Theme words stay highlighted in blue when found.
A Rhode Island woman is reportedly suing a veterinarian after her dog allegedly died when a surgical tool was left inside its abdomen. Kristen Breton of Lincoln, R.I. said she brought her St ...