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Polished Pine Slab
This section of a fossilized pine log was fairly easy to recognise because much of the cross-section of the trunk is preserved, and pine trees are characterized both by circular rings and by radial canals.
Petrified pine is fairly common throughout the fossil record. Such trees make up a significant portion of the vertical polystrate logs we have found in the Australian Permian coalfields. Polystrate means "standing upright through many separate strata", and it is a sure indicator that the many horizontal strata enclosing the vertical tree were formed in less time than it takes a pine tree to rot.
Petrification means that the wood has either been infilled with and/or replaced by, a chemical such as silica, which sets hard. Despite the fact that many people think petrification takes a long time, it is not time which causes the petrification, but a process. See separate item on the Petrified Post on this website (Click Here - make this LINK).
Fossil tree rings tell you several things about the time this tree grew. If rings are irregularly spaced, then the tree had many variations in climate. If they are evenly spaced, then the tree underwent regular growth periods in a fairly even environment. From their very first appearance in the orthodox geological column, pine trees have successfully produced their own kind, as God said He created things to do. Southern Pine Trees (Araucaria) make a large percentage of the trees we have been excavating at our Jurassic Ark fossil flood logjam site near Gympie, Australia.