Editing Dinantian and Namurian rocks of Bolton Abbey and Trollers Gill - an excursion

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==== Locality 6 [SE 078 554] ====
 
==== Locality 6 [SE 078 554] ====
  
Follow the path upstream through woodland for 700 m to the Storiths road and the ford across Pickles Beck. Cross the ford and continue along the road to a point 40 m beyond the crossroads at the river bridge. Here there is an old, overgrown quarry set in lateral '''moraine''' left by the Wharfedale glacier. This material is typical of glacially derived deposits in being unsorted and unbedded and includes only locally derived Carboniferous '''clasts'''.
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Follow the path upstream through woodland for 700 m to the Storiths road and the ford across Pickles Beck. Cross the ford and continue along the road to a point 40 m beyond the crossroads at the river bridge. Here there is an old, overgrown quarry set in lateral moraine left by the Wharfedale glacier. This material is typical of glacially derived deposits in being unsorted and unbedded and includes only locally derived Carboniferous clasts.
  
 
==== Locality 7 [SE 076 553] ====
 
==== Locality 7 [SE 076 553] ====
  
Return to and cross the river bridge before turning right (upstream) and entering Strid Woods. About 100 m into Strid Woods take a small path down towards the river on the right to Sulphur Well. This well is situated approximately on the axis of the Skipton Anticline where sulphate-bearing groundwater (from '''pyrite''' in the shale) reaches the surface, the hydrogen sulphide being produced by the activity of sulphate-reducing bacteria. The white filamentous strands in the water of the spring are probably the bacterial colonies. The thick Skibeden Shale from which the water is emanating is very poorly exposed in this region and can only be seen in small exposures along the riverside between this locality and the next.
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Return to and cross the river bridge before turning right (upstream) and entering Strid Woods. About too m into Strid Woods take a small path down towards the river on the right to Sulphur Well. This well is situated approximately on the axis of the Skipton Anticline where sulphate-bearing groundwater (from pyrite in the shale) reaches the surface, the hydrogen sulphide being produced by the activity of sulphate-reducing bacteria. The white filamentous strands in the water of the spring are probably the bacterial colonies. The thick Skibeden Shale from which the water is emanating is very poorly exposed in this region and can only be seen in small exposures along the riverside between this locality and the next.
  
 
==== Locality 8 [SE 075 555] ====
 
==== Locality 8 [SE 075 555] ====
  
Walk 150 m upstream, passing, on the opposite side of the river, well-exposed Draughton Limestone (Late Dinantian, Asbian Stage), to where thinly bedded limestones and shales of the Middle Bowland Shale are folded into plunging anticlines and synclines. One syncline in particular produces the characteristic V-shaped outcrop pattern in the river-bed, the V being directed towards the observer, in the opposite direction to that of the northeasterly plunge. Dips on the limbs of this syncline vary from 60° to 70°. When the water level is high these folds may not be visible.
+
Walk 150 m upstream, passing, on the opposite side of the river, well-exposed Draughton Limestone (Late Dinantian, Asbian Stage), to where thinly bedded limestones and shales of the Middle Bowland Shale are folded into plunging anticlines and synclines. One syncline in particular produces the characteristic V-shaped outcrop pattern in the river-bed, the V being directed towards the observer, in the opposite direction to that of the northeasterly plunge. Dips on the limbs of this syncline vary from 60° to 70°. When the water level is high these folds may not be visible.
  
 
==== Locality 9 [SE 073 558] ====
 
==== Locality 9 [SE 073 558] ====

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