P number: | P002592 |
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Old photograph number: | D00052 |
Caption: | Taken from about 230 m. north of Craigpark, Ratho, Midlothian. Drainage channel. |
Description: | Taken from about 230 m. north of Craigpark, Ratho, Midlothian. Drainage channel. Wide glacial drainage channel now occupied by the Union Canal. Like the later railway engineers, the canal surveyors chose a route where there would be a minimum of cuttings below ground level and bridges and aqueducts to carry the canal above the ground. However, unlike a railway, the bed of a canal must of course be perfectly horizontal, without any gradient. Such large drainage channels unrelated to the scale of their modern watercourses are common in recently glaciated terranes. They indicate the former presence of a drainage pattern unrelated to modern topography, generally due to the natural drainage being restricted by the presence of large masses of stagnant and wasting ice occupying the low ground through which drainage would normally have flowed. |
Date taken: | Sun Jan 01 00:00:00 GMT 1956 |
Photographer: | Fisher, W.D. |
Copyright statement: | Crown |
Acknowledgment: | This image was digitized with grant-in-aid from SCRAN the Scottish Cultural Resources Access Network |
X longitude/easting: | 312500 |
Y latitude/northing: | 670500 |
Coordinate reference system, ESPG code: | 27700 (OSGB 1936 / British National Grid) |
Orientation: | Landscape |
Size: | 189.27 KB; 1000 x 756 pixels; 85 x 64 mm (print at 300 DPI); 265 x 200 mm (screen at 96 DPI); |
Average Rating: | Not yet rated |
Categories: | Unsorted Images, Geoscience subjects/ Landforms, glaciation/ Overflow and marginal channels |
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