Petrified Wood Bookends (Arizona) 507ab8d06fe18ca7f56c6d954b848ca3 Hypacrosaurus is an extinct genus

Hypacrosaurus is an extinct genus of duck-billed dinosaur from Late Cretaceous North America

feeding upon plankton by a simple yet efficient filtering system

the amount of Neanderthal at any given time was remarkably small

but also intermixed throughout the entire stone

that the "normally gentle" beast could use

Petrified Wood Bookends (Arizona) 507ab8d06fe18ca7f56c6d954b848ca3 Hypacrosaurus is an extinct genusFrom ancient Greek meaning "wood turned into rock", Petrified Wood is a form of fossilization where all the organic matter combines with minerals (usually a silicate, such as quartz) during a process called per mineralization. In order for wood to become petrified it must be completely covered by sediment, thereby depriving the wood of oxygen. Simultaneously, there must be a mineral rich water source close by. Over time, the water delivers the