硅化木一段段断得很整齐，是后来被人锯开的吗？

Petrified wood found in the park and the surrounding region is made up of almost solid quartz. Each piece is like a giant crystal, often sparkling in the sunlight as if covered by glitter. The rainbow of colors is produced by impurities in the quartz, such as iron, carbon, and manganese.

原公园给出区域性形成解释，不是对未提供标本的鉴定或所有硅化木形成历史的概括。

Minerals, including silica dissolved from volcanic ash, absorbed into the porous wood over hundreds and thousands of years crystallized within the cellular structure, replacing the organic material as it broke down over time.

原公园给出区域性形成解释，不是对未提供标本的鉴定或所有硅化木形成历史的概括。

The quartz within the petrified wood is hard and brittle, fracturing easily when subjected to stress. During the gradual uplifting of the Colorado Plateau, starting about 60 million years ago, the still buried petrified trees were under so much stress they broke like glass rods. The crystal nature of the quartz created clean fractures, evenly spaced along the tree trunk, giving the appearance today of logs cut with a chainsaw.

原公园给出区域性形成解释，不是对未提供标本的鉴定或所有硅化木形成历史的概括。