BACKGROUNDPetrified wood is created by precipitation of the mineral quartz from groundwater that flows through the wood after it is buried in sediment. Quartz replaces the wood, often preserving its fine cellular texture. The variety of colors of petrified wood results from impurities within the quartz crystals.

Perhaps the most famous is petrified wood from northern Arizona, extracted from the Chinle Formation of Late Triassic age (220 million years ago). Wood from the Chinle Formation represents conifer trees and is noted for vibrant red and yellow colors.

This image has an empty alt attribute; its file name is Large-cross-sectionIMG_4296-1536x1147-1.jpgLarge Petrified Pine cut and polished from Arizona, with Director Tiffany Santos. Stuhl Museum is at New Mexico State university in Las Cruces.… More

Get the latest posts delivered to your mailbox: