Red Rock Roots

"About 235m years ago, ancient plants grew amongst the shifting sands of a desert river. The roots of these thirsty plants burrowed down into the soft red sand of the desert drawing up any water they could find. Minerals that were dissolved in the water grew in crystals around the roots, encasing them. As time passed, the streams moved and the plants died but the nodules that encased their roots remained fossil roots or Rhizocretions."

It is the vertical tube like structures that are white in colour which are the remains of the fossils and roots.