Editing Carboniferous (Namurian and Westphalian) of the Cliviger Valley, Todmorden - an excursion

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The Gastrioceras cancellatum Marine Band is exposed in a small shale cliff and on the water-worn ledges at stream level at this location in the lower reaches of Ratten Clough. The shales of the marine band have been cemented to form a hard, resistant lithology.
 
The Gastrioceras cancellatum Marine Band is exposed in a small shale cliff and on the water-worn ledges at stream level at this location in the lower reaches of Ratten Clough. The shales of the marine band have been cemented to form a hard, resistant lithology.
  
A short distance upstream, the Lower Haslingden Flags form a small waterfall. Only 10   thick here, this sandstone is considerably thicker further to the southwest around Rochdale and Bury where it is quarried for flagstone.
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A short distance upstream, the Lower Haslingden Flags form a small waterfall. Only 10 m thick here, this sandstone is considerably thicker further to the southwest around Rochdale and Bury where it is quarried for flagstone.
  
 
=== Locality 2 [SD 890 267] ===
 
=== Locality 2 [SD 890 267] ===
  
Ascend the increasingly steep and eventually precipitous Ratten Clough to the base of a superb cliff section of the Rough Rock — the quintessential example of a Millstone Grit, a coarse, '''feldspathic''' sandstone. In the lower, most accessible part of the cliff, the thin beds of fine sandstone belong to the Upper Haslingden Flags. This again is the rather feeble development of a sandstone which is thicker to the southwest. The Rough Rock, in contrast, occurs throughout the Pennines. At this locality it can be seen to erode down into the Upper Haslingden Flags for 10 cm, but on a larger scale the down-cutting is more spectacular. At Beater Clough, 600 m south of this locality, the erosion has cut down to a level nearly 15 m lower than that seen in Ratten Clough. The basal beds of the Rough Rock contain numerous stems of ''Calamites ''which probably occurred as log-jams in the fast-flowing rivers that deposited the Rough Rock. The abundant '''cross-beds''' seen in the cliff face represent cross-sections through sand bars within these river channels.
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Ascend the increasingly steep and eventually precipitous Ratten Clough to the base of a superb cliff section of the Rough Rock — the quintessential example of a Millstone Grit, a coarse, feldspathic sandstone. In the lower, most accessible part of the cliff, the thin beds of fine sandstone belong to the Upper Haslingden Flags. This again is the rather feeble development of a sandstone which is thicker to the southwest. The Rough Rock, in contrast, occurs throughout the Pennines. At this locality it can be seen to erode down into the Upper Haslingden Flags for to cm, but on a larger scale the down-cutting is more spectacular. At Beater Clough, 600 m south of this locality, the erosion has cut down to a level nearly 15 m lower than that seen in Ratten Clough. The basal beds of the Rough Rock contain numerous stems of ''Calamites ''which probably occurred as log-jams in the fast-flowing rivers that deposited the Rough Rock. The abundant cross-beds seen in the cliff face represent cross-sections through sand bars within these river channels.
  
 
=== Locality 3 [SD 888 267] ===
 
=== Locality 3 [SD 888 267] ===

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