All three basic rock types (Igneous, Sedimentary and Metamorphic) from right across the Peak Downs district feature in the Capella Geo-park, on the south bank of Capella Creek. Here you will find some marine fossil examples too.
The petrified tree log is a 23 metre long section of glossopteridale that was found east of Capella. In the area where it lay, there are other shorter examples and they all lay in a roughly parallel alignment.
This alignment probably happened at the time of deposition and might be due to current action. It is likely that the current activity of a river moved the trees into place, as logs transport in water fairly easily and they would have lined up nicely in a modest current. It is unlikely that the log alignments were caused by wave action where the trees would be lined up at right angles to the wave action on a beach face deposit.
Glossopteris (from the Greek glossa meaning "tongue", because the leaves were tongue-shaped) is the largest and best-known genus of the extinct order of seed-fern known as Glossopteridales.
The Glossopteridales arose around the beginning of the Permian Period on the great southern continent of Gondwana. These plants went on to become the dominant elements of the southern flora through the rest of the Permian but disappeared in almost all places at the end of the Permian. (Gondwana was a super-continent which existed in the southern part of the globe until about 200 million years ago, when it began to break into its constituent parts: Africa, Madagascar, India, South America, Antarctica and Australia.)
They are interpreted to have grown in very wet soil conditions, similar to the modern Bald Cypress. The leaves ranged from about 2 cm to over 30 cm in length.
The image below is of grey granite boulders.