| P number: | P210276 |
|---|---|
| Old photograph number: | A10375 |
| Caption: | Fractured folds at Efford Ditch, Bude, Cornwall. |
| Description: | Looking east at Efford Ditch, 3/4 m. west 25 degrees south of Bude. Fractured folds in Bude Sandstones. Major fold structure with fold axial plane swinging from a near horizontal attitude to a dip of 35 degrees north above low-angled fault dipping and downthrowing south. Beneath the fault plane, drag folding about planes sub-parallel to the fault occurs producing a zig-zag style at the northern end (left) of section. Even-bedded sandstones and finely-bedded, dark mudstone units typical of the Lower Westphalian Bude Sandstones Group are represented in the photograph. The Devonian and Carboniferous rocks of north Cornwall have been subjected to several phases of deformation. Their structures resemble those found in similar rocks north of Dartmoor, both areas lying in a west-east band on the southern side of the major syncline whose axis runs through central Devon. Effects of the main phase of the Armorican orogeny have been modified by the intrusion of granite and by later wrench faulting which has been active up to Recent times. |
| Date taken: | Fri Jan 01 00:00:00 GMT 1965 |
| Photographer: | Pulsford, J.M. |
| Copyright statement: | NERC |
| X longitude/easting: | 220500 |
| Y latitude/northing: | 105500 |
| Coordinate reference system, ESPG code: | 27700 (OSGB 1936 / British National Grid) |
| Orientation: | Landscape |
| Size: | 356.47 KB; 1000 x 787 pixels; 85 x 67 mm (print at 300 DPI); 265 x 208 mm (screen at 96 DPI); |
| Average Rating: | Not yet rated |
| Categories: | Unsorted Images, Geoscience subjects/ Structural features/ Folding, Geoscience subjects/ Stratigraphical/ Carboniferous |
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