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JURASSIC FOSSILISED WOOD (slice of small log) - 150 million years old - Isle of Portland, Dorset

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FOSSILISED WOOD (JURASSIC)

Unpolished slice of small log

150 million years old

Isle of Portland, Dorset

At the base of the Purbeck Formation in Dorset is a layer of rock containing fossil trees that have now been silicified - in other words completely replaced by quartz.  The trees grew around a saline lagoon that occupied this area towards the end of the Jurassic period.

The dominant tree was a large conifer that was adapted to living in what was then a climate of hot, arid summers and warm, wet winters. The growth rings in the wood indicate that a highly seasonal environment prevailed in Southern England during the late Jurassic period.

The trees were drowned by the rising waters of the lagoon and many have been preserved in their original positions of growth. At this time Dorset was situated at the same latitude as present-day Malta.
  
This is a thin slice of fossil wood, attractively presented in a clear cellophane bag in a lidded gift box.

Click on a picture for a larger image

Size: 7.5 x 5.7 x 0.3 centimetres
Weight: approx. 24 grams

PRICE: £12.00