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

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==== Locality 7 [SK 252 823] ====
 
==== Locality 7 [SK 252 823] ====
  
At Callow Bank 0–15 m of dark grey shales, with occasional flat, tabular '''sideritic''' nodules and rare plant fragments, crop out below the lower leaf of the Rivelin Grit. The shales, which have yielded rare specimens of ''Gastrioceras ''crop out ''in situ ''as well as forming part of a slumped area (recognized by the hummocky ground) below the crags of the Rivelin Grit. Continue examining the shale outcrops up the slope towards the crags and note that they coarsen slightly until, just below the grit, the shales are interbedded with thin cross-laminated siltstone and fine sandstones. The lower leaf of the Rivelin Grit rests with a sharp junction (scoured surface) on the interbedded siltstones and sandstones. The grit is formed of apparently massive sandstones, but careful observation will reveal the presence of diffuse bedding and interbedded siltstone horizons. Further up the slope a poorly exposed interval indicates the presence of a finer-grained unit before further thick sandstones are exposed at the top of the slope. To reach Locality 8 at Upper Burbage Brook, return to the road and continue in a northerly direction (passing the car park) until Upper Burbage Bridge is reached. Descend to the exposures between the road and the confluence of the two streams.
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At Callow Bank 0–15 m of dark grey shales, with occasional flat, tabular sideritic nodules and rare plant fragments, crop out below the lower leaf of the Rivelin Grit. The shales, which have yielded rare specimens of ''Gastrioceras ''crop out ''in situ ''as well as forming part of a slumped area (recognized by the hummocky ground) below the crags of the Rivelin Grit. Continue examining the shale outcrops up the slope towards the crags and note that they coarsen slightly until, just below the grit, the shales are interbedded with thin cross-laminated siltstone and fine sandstones. The lower leaf of the Rivelin Grit rests with a sharp junction (scoured surface) on the interbedded siltstones and sandstones. The grit is formed of apparently massive sandstones, but careful observation will reveal the presence ofdiffuse bedding and interbedded siltstone horizons. Further up the slope a poorly exposed interval indicates the presence of a finer-grained unit before further thick sandstones are exposed at the top of the slope. To reach Locality 8 at Upper Burbage Brook, return to the road and continue in a northerly direction (passing the car park) until Upper Burbage Bridge is reached. Descend to the exposures between the road and the confluence of the two streams.
  
 
==== Locality 8 [SK 261 829] ====
 
==== Locality 8 [SK 261 829] ====

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