Fossil Fern – Lune River Tasmania – Early Jurassic Forest circa 182 million years old.

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Fossil Fern – Lune River Tasmania – Early Jurassic Forest circa 182 million years old.

Short Description

A nice slice of petrified tree fern from the Lune River area deep in the southern reached of Tasmania.

The dating of the examples in this location to the middle of the early Jurassic Period (182 Ma) was by isotopic measurements on zircons found in the volcanic sandstone hosting the fossils (Bromfield et al 2007). Also refer the excellent guide by P. Manchester.

Weighing 70gm and 16cm by 5cm.

This region is the area of the world where these plants developed. Twelve tree paratypes (arborescent) ferns and one bracken-like (rhizomatous) fern have been studied in the region. All of the tree ferns belong to the genus Osmundacaulis. This example shows clear and tight trachioles

These plants evolved in this region, the Australian portion of Pangea, all that time ago. Gradually they have spread elsewhere and appear in North-west USA ... examples were only discovered in Eurasia in the year 2000.

Nice part section of a fossil tree fern from Jurassic Tasmania .

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