![](/CatCache/catcache.2/pictures/514534/514534_M_1.jpg)
Lotto 929* - S18 Out of This World - martedì, 18. aprile 2023, 16h00
FOSSIL WOOD
225 million years
Arizona, USA
During the Late Triassic period, approximately 225 million years ago, Northern Arizona had a tropical climate that supported a vast forest of conifer trees. The majority of the trees were of the species Araucarioxylon arizonicum, which grew up to 200 feet (61 m) tall with a trunk up to 5 feet (1.5 m) thick. It likely would have resembled a modern pine tree. Occasionally fallen trees would become buried in sediment and volcanic ash. Due to its rapid burial and the lack of oxygen, the wood did not decay as it would if it had remained on the surface. Silica and other minerals present in the ground water seeped into the porous wood over many years. This caused the cellular structure of the wood to become crystallised and turned it into a fossil.
The rainbow coloration with vibrant hues of reds, yellows and purples is typical for petrified fossils from Arizona. It is made up of almost solid quartz, like a giant crystal, and sparkles in the sunlight as if it were covered with glitter. The rainbow colours are produced by impurities in the quartz, such as iron, arbon or manganese. Purple amethyst, yellow citrine, clear quartz and smoky quartz have formed here into a wonderful piece of natural art.
CHF 12 000 / 15 000 | (€ 12 370 / 15 460)
Venduto per CHF 18 600 (incl. premio dell'acquirente)
Non si assume alcuna responsabilità per la correttezza di queste informazioni.