Editing Middle and Upper Carboniferous rocks (Millstone Grit and Coal Measures) of the Sheffield region - an excursion

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==== Locality 2 [S[SK 268 815] ====
 
==== Locality 2 [S[SK 268 815] ====
  
After about 1 km the prominent scarp becomes less well-defined. Just to the south the scarp becomes much more prominent again but is some 400 m to the east of the path. This abrupt change in position is due to a fault '''downthrowing''' to the north. However, to the west, of the prominent flat-topped hills Carl Wark (see Locality 5) and Higger Tor (see Locality 6), Higger Tor to the right (north) is over 45 m higher, indicating its relative upward displacement. A further 500 m along the footpath to the southwest, a large quarry is visible in the scarp to the east. Leave the path and ascend to this quarry, taking care as you go through the boulder field below the quarry entrance.
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After about 1 km the prominent scarp becomes less well-defined. Just to the south the scarp becomes much more prominent again but is some 400 m to the east of the path. This abrupt change in position is due to a fault downthrowing to the north. However, to the west, of the prominent flat-topped hills Carl Wark (see Locality 5) and Higger Tor (see Locality 6), Higger Tor to the right (north) is over 45 m higher, indicating its relative upward displacement. A further 500 m along the footpath to the southwest, a large quarry is visible in the scarp to the east. Leave the path and ascend to this quarry, taking care as you go through the boulder field below the quarry entrance.
  
 
==== Locality 3 (SK 266 810] ====
 
==== Locality 3 (SK 266 810] ====
  
The Rivelin Grit here has been extensively quarried and the 20 m high, vertical joint faces (popular among climbers) show large foreset beds dipping towards the south. Numerous millstones, in various stages of completion, lie around the quarry entrance; some are up to 1.9 m across and nearly 0.4 m thick. Also visible in the adjacent scarp to the south of the quarry are boreholes showing the method of extraction of the sandstone blocks. Follow the quarry path obliquely across the boulder field to the southwest and pass through the old stone gate posts along the track to the quarry approximately 60 m from the junction with the main footpath. There is a fine example of a stone trough (difficult to locate when the bracken is high), and yet more millstones, just before the junction with the main path. Take the minor track at [SK 262 808] to the northwest, towards Burbage Brook, where there are small exposures of shales which underlie both leaves of the Rivelin Grit.
+
The Rivelin Grit here has been extensively quarried and the 20 m high, vertical joint faces (popular among climbers) show large foreset beds dipping towards the south. Numerous millstones, in various stages of completion, lie around the quarry entrance; some are up to 1.9 m across and nearly 0.4 m thick. Also visible in the adjacent scarp to the south of the quarry are boreholes showing the method of extraction of the sandstone blocks. Follow the quarry path obliquely across the boulder field to the southwest and pass through the old stone gate posts along the track to the quarry approximately 60 m from the junction with the main footpath. There is a fine example of a stone trough (difficult to locate when the bracken is high), and yet more millstones, just before the junction with the main path. Take the minor track at [SK 262 808] to the northwest, towards Burbage Brook, where there are small exposures of shales which underlie both leaves of the Rivelin Grit.
  
 
==== Locality 4 [SK 262 809] ====
 
==== Locality 4 [SK 262 809] ====
  
A larger exposure occurs on the west bank 75 m further north (access via the west bank). Here, fissile dark-grey shales along a track in a north-northwest direction.
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A larger exposure occurs on the west bank 75 m further north (access via the west bank). Here, fissile dark-grey shales along a track in a north-northwest direction.
  
 
==== Locality 5 [SK 260 814] ====
 
==== Locality 5 [SK 260 814] ====

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