The answer is that petrified trees don't contain wood in the traditional sense. They are made of petrified wood, which is the result of a very specific process.
Here's what happens:
1. Tree Dies: The first step is a tree dying and being buried in sediment, often in a swampy area.
2. Water Infiltration: Water containing dissolved silica, minerals, and other elements seeps into the tree's pores.
3. Mineral Replacement: Over time, the water slowly replaces the organic matter in the wood with minerals, primarily silica (quartz). This process happens molecule by molecule, preserving the wood's structure.
4. Petrified Wood: The result is petrified wood, which is essentially a stone replica of the original tree. It retains the grain, texture, and often even the bark of the original wood, but it's now made of minerals.
So, while a petrified tree doesn't contain the original wood, it does contain the mineralized remnants of the wood's structure.
