| P number: | P521258 |
|---|---|
| Caption: | Rock specimen of conglomerate. North-east from Inveran, Loch Maree, Rosshire, Scotland. |
| Description: | The rock is a mixture of pebbles and gritty fragments of various composition, held within a red-brown coloured sandy matrix cement. British Geological Survey Petrology Collection sample number EMC277. The pebbles in the sample, known as clasts, are deep red in colour, as a result of surface staining and alteration by iron oxide. This rock would have formed typically in the bed of a large river or alluvial fan in a desert or arid environment. The conglomerate is of Torridonian age, part of the Precambrian and dates from c. 1000-750 Ma. The Torridonian conglomerates were deposited on the south east margin of a northern continent on an ancient Lewisian topography. The rounded worn clasts in the conglomerate indicate deposition in a fluvial environment. |
| Date taken: | Sun Dec 01 00:00:00 GMT 2002 |
| Photographer: | McTaggart, F.I. |
| Associate: | T.S. Bain |
| Copyright statement: | NERC |
| Additional information: | EMC277 |
| Orientation: | Landscape |
| Size: | 229.36 KB; 1000 x 775 pixels; 85 x 66 mm (print at 300 DPI); 265 x 205 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Best of BGS Images/ Geological structures |
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