Uploaded on:
26/12/2012 10:02:03
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285.67 KB
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P number: P804363
Caption: ??????. Derbyshire, August 3rd 1914.
Description: In the process of cooling and contraction this rock frequently assumes a columnar structure and often divided by cross joints. In this case instead of being angular each segment owing to weathering takes a spheroidal form. It is stated that the cause of this is owing to the middle of each spheroid being a centre of crystallisation around which the different minerals of the rock arranged themselves.
Copyright statement: NERC
Additional information: From the Geologists' Association Carreck Archive. The Reader Geological Photographs. Long excursions 1914. Part 2.
Orientation: Portrait
Size: 285.67 KB; 766 x 999 pixels; 65 x 85 mm (print at 300 DPI); 203 x 264 mm (screen at 96 DPI);
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Categories: Special collections/ Geologists' Association 'Carreck Archive'/ T W Reader geological photographs, long excursions 1914. Part 2  


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