P number: | P521314 |
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Caption: | Rock specimen of tuff. Carling Craig, Glen Water, Darvel, Ayrshire, Scotland. |
Description: | The rock is a complex mixed volcanic tuff with abundant clasts of variable composition and size, ranging from white feldspar-rich material to fine-grained dark basic igneous compositions. British Geological Survey Petrology Collection sample number EMC3281. At Darvel sandstones of Old Red Sandstone age are overlain by volcanic rocks consisting of basalts, andesites and intercalated ashy tuffs. The Dunlop-Eaglesham-Darvel Hills are characterized by the presence of a wide range of Lower Carboniferous light-coloured silica-rich lavas including hornblende-trachyandesites, trachytes, quartz-trachytes and rhyolites, together with associated bedded pyroclastic material. Over twenty plugs and vents, mostly of trachyte and phonolite are broadly distributed along an ESE axis between Irish Law and Loudoun Hill. |
Date taken: | Sun Dec 01 00:00:00 GMT 2002 |
Photographer: | McTaggart, F.I. |
Associate: | T.S. Bain |
Copyright statement: | NERC |
Additional information: | EMC3281 |
Orientation: | Landscape |
Size: | 293.70 KB; 1000 x 783 pixels; 85 x 66 mm (print at 300 DPI); 265 x 207 mm (screen at 96 DPI); |
Average Rating: | Not yet rated |
Categories: | Best of BGS Images/ Geological structures |
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