| P number: | P521167 |
|---|---|
| Caption: | A fossil specimen of Diplograptus elongatus. A fossil graptolite. (Graptolithina.) Float Bay., Wigtownshire, Scotland. |
| Description: | The diplograptids are scandent graptolites with two stipes that have fused to create a biserial rhabdosome i.e. the stipes grow erect along the virgula and two rows of thecae are arranged back to back. British Geological Survey Biostratigraphy Collection number GSE 14930. The graptolites were exclusively planktonic, floating in the sea especially where major upwelling currents brought nutrients from deep water to the shallows. They developed a number of strategies to sustain their floating lifestyle, long nemas evolved to retard sinking, hooks, spines and nets would have had a high drag. It is thought that the zooids may have secreted gas or low-density fat to enable them to rise through the water. This specimen is from the cyphus Biozone of the Silurian and was found at Float Bay. Figd.Geology of the Rhins of Galloway sheet 1 and 3, fig 8n. |
| Date taken: | Wed Jan 01 00:00:00 GMT 2003 |
| Photographer: | Unknown |
| Copyright statement: | NERC |
| Orientation: | Landscape |
| Size: | 347.41 KB; 1000 x 665 pixels; 85 x 56 mm (print at 300 DPI); 265 x 176 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images |
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