Description

Fossil, Fossilized wood from the Henry Mountains, Utah. Specimen #29.

You will receive this exact specimen, which is approximately 4 3/4″ long x 3 3/4″ tall x 2″ deep.

Fossilized wood from Utah’s Henry Mountains comes from a time, over 150 million years ago, when rivers, floodplains, and conifer forests covered this now-rugged desert region. Fallen trees were quickly buried by sand and mud carried by ancient streams, sealing them away from oxygen. Over immense spans of time, silica-rich groundwater moved through the buried logs, replacing the wood cell by cell with quartz while preserving growth rings, knots, and even microscopic structure.

Later, molten magma intruded upward to form the Henry Mountains’ distinctive laccoliths, gently lifting and tilting the surrounding sedimentary layers. This geologic “uplift” helped expose the petrified logs at the surface, where erosion revealed them as stone records of Jurassic and Cretaceous forests. Colors in Henry Mountains petrified wood—creams, reds, purples, and blacks—reflect traces of iron, manganese, and carbon locked into the silica during fossilization.

Fossilized wood, often called petrified wood, is the stone “memory” of an ancient forest. Millions of years ago, trees were buried by sediment, cutting off oxygen and slowing decay. Mineral-rich groundwater then seeped through the wood’s microscopic клетка-sized spaces, replacing the original organic material molecule by molecule with silica, calcite, or iron oxides. The result is a perfect mineral cast of the tree’s internal structure—growth rings, knots, and even tiny cells preserved in stone.

Colors in fossilized wood tell a geologic story: reds and yellows come from iron, blacks from carbon or manganese, and greens from trace copper or chromium. Each piece is both a fossil and a crystal, recording the climate, chemistry, and ecosystems of deep time while retaining the familiar form of bark and branches.