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P521051

Uploaded on:
11/03/2009 02:47:40
Type:
Digital Asset
File Size:
404.96 KB
Dimensions:
628 x 1000 pixels
3800 views 4 downloads
P number: P521051
Caption: A fossil specimen of Coniopteris arguta Lindley and Hutton. A fossil plant. (Plantae.) Sron Rudha Gaoithe, Wester Garty, Sutherland, Sutherland, Scotland.
Description: Coniopteris is a true fern or pteropsid. This specimen is from the Jurassic, a period where fern forms were a very important part of the flora. British Geological Survey Biostratigraphy Collection number GSE 14724. Coniopteris is a common form of the Cyatheaceae, it has finely divided fronds that have small cup-shaped fertile segments. The Mesozoic floras were very different from the earlier Carboniferous floras, the giant lycopods were replaced by smaller herbaceous plants similar to modern club mosses, the pteridosperms do not occur in the Mesozoic. The most noticiable change is the abundance, variety and widespread distribution of cycads. Ginkgos also spread thoughout the northern hemisphere while today only a single species remains.
Date taken: 01/01/2003
Photographer: Unknown
Copyright statement: NERC
Orientation: Portrait
Size: 404.96 KB; 628 x 1000 pixels; 53 x 85 mm (print at 300 DPI); 166 x 265 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Best of BGS Images/ Fossils  

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