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

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Those who have the stamina can make their way around the Rough Rock escarpment to the headwaters of Ratten Clough where the Gastrioceras subcrenatum Marine Band occurs. This contains goniatites and bivalves, and is taken as the boundary between the Namurian and the Westphalian.
 
Those who have the stamina can make their way around the Rough Rock escarpment to the headwaters of Ratten Clough where the Gastrioceras subcrenatum Marine Band occurs. This contains goniatites and bivalves, and is taken as the boundary between the Namurian and the Westphalian.
  
It is instructive to view the hillside on the opposite side of the Cliviger Valley from this point. A series of ridges with steep southeasterly and gentle northwesterly slopes represents the expression of several Westphalian cyclothems '''dipping''' at around 20° to the west — sandstones form the ridge-tops. This is in contrast to the strata just examined on the southwest side of the valley which dip very gently to the southwest. The change in dip and '''strike''' occurs across the Cliviger Fault which runs along the line of the railway line in this part of the valley. This is a major fault with a '''downthrow''' of over 200 m to the north, along which patchy deposits of galena have been mined.
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It is instructive to view the hillside on the opposite side of the Cliviger Valley from this point. A series of ridges with steep southeasterly and gentle northwesterly slopes represents the expression of several Westphalian cyclothems dipping at around 20° to the west — sandstones form the ridge-tops. This is in contrast to the strata just examined on the southwest side of the valley which dip very gently to the southwest. The change in dip and strike occurs across the Cliviger Fault which runs along the line of the railway line in this part of the valley. This is a major fault with a downthrow of over 200 m to the north, along which patchy deposits of galena have been mined.
  
 
For the second half of the excursion, cars are best parked in Cornholme for there is little parking space in the Pudsey Clough valley. Make your way up this valley, noting the impressive crags of the Reddish Shore Rocks at the head of the Clough. This is the Rough Rock again which is here curiously weathered into very large rounded blocks.
 
For the second half of the excursion, cars are best parked in Cornholme for there is little parking space in the Pudsey Clough valley. Make your way up this valley, noting the impressive crags of the Reddish Shore Rocks at the head of the Clough. This is the Rough Rock again which is here curiously weathered into very large rounded blocks.

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