File:P000072.jpg

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Ballochmyle Quarry, Mauchline. Ayrshire. Permian red desert sandstones showing large-scale aeolian (wind-blown) dune-bedding. A close-up of C02912. The view shows five quarrymen standing in front of the working face. The dune-bedding is composed of three large wedges, the bounding surfaces represent a time when the underlying dune was eroded prior to the deposition of the next dune. New Red Sandstone of Permian age.

It is part of a former very large dune composed of smaller migrating dunes. The three large wedges are bounded by 2nd order bounding surfaces. The surfaces represent a period of time when the underlying dune was eroded, prior to deposition of the next dune. Within each wedge fainter laminations, 3rd order bounding surfaces (best seen in the middle wedge), converge downwards. These 3rd order bounding surfaces dip at angles in excess of 35° and flatten out as they curve towards the base of the unit. The size of sandstone block that can be hewn depends on the position from which the block is taken. For example thick beds may be worked from near the top of each major wedge defined by the 2nd order bounding surfaces.

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current23:16, 11 April 2015Thumbnail for version as of 23:16, 11 April 20151,000 × 731 (339 KB)Scotfot (talk | contribs)Ballochmyle Quarry, Mauchline. Ayrshire. Permian red desert sandstones showing large-scale aeolian (wind-blown) dune-bedding. A close-up of C02912. The view shows five quarrymen standing in front of the working face. The dune-bedding is composed of thr...
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