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Uploaded on:
18/02/2009 11:15:37
Digital Asset
File Size:
368.59 KB
1000 x 778 pixels
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P number: P210181
Old photograph number: A10280
Caption: Solution pipes of Head in Middle Chalk, Hogtrough Hill, Brasted, Kent.
Description: Chalk workings at Hogtrough Hill, 1 1/4 m. north-west of Brasted. Solution pipes of Head in Middle Chalk. The chalk is without flints, but these occur in the disturbed chalky rubble and loam which, though negligible on the hill-slope surface, is preserved in irregular solution hollows reminiscent of normal pipes of Clay-with-flints. A solution pipe is a vertical cylindrical hole formed in carbonate rocks by solution, in this case the Cretaceous Middle Chalk. Solution pipes and solution hollows are known in a number of locations in the area, some contain clay-with-flints. The Chalk is an important formation in the area and usually forms high ground. It is divided into three formations, the Lower, Middle and Upper Chalk. The Middle Chalk varies in thickness from place to place between 180 and 250 feet.
Date taken: 01/01/1965
Photographer: Pulsford, J.M.
Copyright statement: NERC
X longitude/easting: 545500
Y latitude/northing: 156500
Coordinate reference system, ESPG code: 27700 (OSGB 1936 / British National Grid)
Orientation: Landscape
Size: 368.59 KB; 1000 x 778 pixels; 85 x 66 mm (print at 300 DPI); 265 x 206 mm (screen at 96 DPI);
Average Rating: Not yet rated
Categories: Unsorted Images, Geoscience subjects/ Landforms, karst/ Solution pipes  


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