NS0243 : Sandstone Stair

near to Corrie, North Ayrshire, Great Britain

Sandstone Stair
Sandstone Stair
This stepped surface is in fact totally natural. The steps are the surfaces of successive beds of Permian sandstone which dip gently away from the photographer location, so that the edge of each bed looks like a miniature scarp. The pitting of the surface is carious weathering, which occurs because the natural cement binding the sandstone grains contains calcite, which is soluble in water. The red colour is from iron oxides coating the sand grains that make up the rock; this is typical of sandstones laid down in a desert environment, and reflects the fact that when these beds were formed, Scotland lay at roughly the latitude where the Sahara Desert now is. The effect is enhanced by the previous night's rain, and beautifully lit by morning sunshine.
Creative Commons Licence [Some Rights Reserved]   © Copyright Anne Burgess and licensed for reuse under this Creative Commons Licence.
year taken
2012
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NS0243, 99 images   (more nearby)
Photographer
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Image classification?
Geograph
Date Taken
Sunday, 16 September, 2012   (more nearby)
Submitted
Wednesday, 26 September, 2012
Geographical Context
Geological interest 
Subject Location
OSGB36: geotagged! NS 0257 4313 [10m precision]
WGS84: 55:38.4901N 5:8.3184W
Photographer Location
OSGB36: geotagged! NS 0257 4313
View Direction
West-southwest (about 247 degrees)
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