Editing The Quaternary of South Tynedale - an excursion

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Approximate flow lines at the maximum phase of Dimlington Stadial glaciation (continuous arrows) and at a later phase of glaciation (broken arrows) are shown in [[:File:YGS_NORTROCK_FIG_12_2.jpg|Figure 12.2]]. Later still, during deglaciation, divides became exposed and wasting ice was confined to the valleys. Flow lines are inferred from the limits and direction of carry of erratics, the orientation of meltwater channels, till characteristics, and the orientation of striae and drumlins. At the maximum, much of the area was glaciated by ice orginating to the west, in the Lake District, Vale of Eden and southwest Scotland. However, western ice even at this stage failed to overcome the Cross Fell ice cap and override the highest parts of the main Pennine fault-scarp, so that the upper parts of the dales of the Alston Block were occupied only by local Pennine ice. The influence of local Cross Fell ice increased further as incursive Edenside ice thinned after the maximum.
 
Approximate flow lines at the maximum phase of Dimlington Stadial glaciation (continuous arrows) and at a later phase of glaciation (broken arrows) are shown in [[:File:YGS_NORTROCK_FIG_12_2.jpg|Figure 12.2]]. Later still, during deglaciation, divides became exposed and wasting ice was confined to the valleys. Flow lines are inferred from the limits and direction of carry of erratics, the orientation of meltwater channels, till characteristics, and the orientation of striae and drumlins. At the maximum, much of the area was glaciated by ice orginating to the west, in the Lake District, Vale of Eden and southwest Scotland. However, western ice even at this stage failed to overcome the Cross Fell ice cap and override the highest parts of the main Pennine fault-scarp, so that the upper parts of the dales of the Alston Block were occupied only by local Pennine ice. The influence of local Cross Fell ice increased further as incursive Edenside ice thinned after the maximum.
  
Hartside Pass [NY 64 41] is near to the southern limit of erratics carried across the Pennine western escarpment from the Vale of Eden. Further east, erratics from the Lake District etc. have been found in the till of West Allendale as far up-valley as Whitfield [NY 77 56], and in East Allendale as far up-valley as Sipton [NY 85 50] ([[:File:YGS_NORTROCK_FIG_12_2.jpg|Figure 12.2]]).
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Hartside Pass (NY 6441) is near to the southern limit of erratics carried across the Pennine western escarpment from the Vale of Eden. Further east, erratics from the Lake District etc. have been found in the till of West Allendale as far up-valley as Whitfield (NY 7756), and in East Allendale as far up-valley as Sipton (NY 8550) ([[:File:YGS_NORTROCK_FIG_12_2.jpg|Figure 12.2]]).
  
 
== Excursion details ==
 
== Excursion details ==

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