Editing Carboniferous of the Wear Valley and Derwent Gorge, County Durham - an excursion

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[[File:YGS_NORTROCK_FIG_15_1.jpg|thumbnail|Figure 15.1 (a) Carboniferous succession, and inset geological map for mid Durham, showing sections described at localities 1-4. (b) Geology of Middlehope Burn, Westgate (Locality 1).]]
 
[[File:YGS_NORTROCK_FIG_15_1.jpg|thumbnail|Figure 15.1 (a) Carboniferous succession, and inset geological map for mid Durham, showing sections described at localities 1-4. (b) Geology of Middlehope Burn, Westgate (Locality 1).]]
 
[[File:YGS_NORTROCK_FIG_15_2.jpg|thumbnail|Figure 15.2 Geological map of the River Wear Gorge, Durham City. Details of boreholes are given in Johnson and Richardson (1990).]]
 
[[File:YGS_NORTROCK_FIG_15_2.jpg|thumbnail|Figure 15.2 Geological map of the River Wear Gorge, Durham City. Details of boreholes are given in Johnson and Richardson (1990).]]
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== 15 Carboniferous of the Wear Valley and Derwent Gorge, County Durham ==
  
 
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By Tony Johnson University of Durham.
By '''Tony Johnson''' University of Durham.
 
 
 
  
 
== Purpose ==
 
== Purpose ==
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{{YGSLogistics}}
 
{{YGSLogistics}}
  
Localities 1 (Westgate), 2 (Frosterley) and 4 (Durham City) can be reached by public transport, but Locality 3 (Derwent Gorge) is best visited by car. Parking places are available at all localities. With transport, Localities 1, 2 and 3 can be visited in one day; Locality 4 will require an extra half day. Walking distance depends on the routes taken, but is not more than 4.5 km at Locality 1, 2 km at Locality 2, 4.5 km at Locality 3 and 1.5 km at Locality 4.
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Localities 1 (Westgate), 2 (Frosterley) and 4 (Durham City) can be reached by public transport, but Locality 3 (Derwent Gorge) is best visited by car. Parking places are available at all localities. With transport, Localities 1, 2 and 3 can be visited in one day; Locality 4 will require an extra half day. Walking distance depends on the routes taken, but is not more than 4.5 km at Locality 1, 2 km at Locality 2, 4.5 km at Locality 3 and 1.5 km at Locality 4.
  
Prior permission for access to Harehope Quarry (Locality 2) should be obtained from Tilcon Ltd, Chester-le-Street, and for access to the Derwent Gorge (Locality 3A) from English Nature.
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Prior permission for access to Harehope Quarry (Locality 2) should be obtained from Mr R. J. Huddleston, Tilcon Ltd, P.O. Box 5, Fell Bank, Birtley, Chester-le-Street, Durham, DH3 2ST, and for access to the Derwent Gorge (Locality 3A) from English Nature (Tel: 01661 845500).
  
 
== Maps ==
 
== Maps ==
  
O.S. 1:50 000 Sheets 87 Hexham & Haltwistle, 88 Tyneside & Durham, 92 Barnard Castle; B.G.S. 1:50 000 Sheets 20 Newcastle upon Tyne, 25 Alston, 26 Wolsingham; B.G.S. 1:63 360 Sheet 27 Durham.
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O.S. 1:50 000 Sheets 87 Hexham & Haltwistle, 88 Tyneside & Durham, 92 Barnard Castle; B.G.S. 1:50 000 Sheets 20 Newcastle upon Tyne, 25 Alston, 26 Wolsingham; B.G.S. 1:63 360 Sheet 27 Durham.
  
 
== Geological background ==
 
== Geological background ==

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