Editing Upper Carboniferous of the Halifax area - an excursion

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The excursion can be completed in one short day as all the localities occur within 10 km to the south and southwest of Halifax ([[:File:YGS_YORKROCK_FIG_09_01.jpg|Figure 9.1]]) and are easily accessible by road. Very little off-road walking is required and the distances involved at individual outcrops are less than 1 km, mostly over footpaths and rough tracks. Care must be excercised when visiting outcrops in quarries and road cuttings, and hard hats are recommended for safety. Private transport is an advantage but not essential, and parking facilities are available at all localities. The excursion is not suitable for large parties.
 
The excursion can be completed in one short day as all the localities occur within 10 km to the south and southwest of Halifax ([[:File:YGS_YORKROCK_FIG_09_01.jpg|Figure 9.1]]) and are easily accessible by road. Very little off-road walking is required and the distances involved at individual outcrops are less than 1 km, mostly over footpaths and rough tracks. Care must be excercised when visiting outcrops in quarries and road cuttings, and hard hats are recommended for safety. Private transport is an advantage but not essential, and parking facilities are available at all localities. The excursion is not suitable for large parties.
  
Prior permission should be sought for access to Clockface Quarry from Marshalls, Brier Lodge, Southowram, Halifax.
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Prior permission should be sought for access to Clockface Quarry from Marshalls, Brier Lodge, Southowram, Halifax, HX3 9SY (tel. 01422 306000].
  
 
== Maps ==
 
== Maps ==
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=== Locality 5, Upper Elland Edge [SE 118 204] ===
 
=== Locality 5, Upper Elland Edge [SE 118 204] ===
  
This outcrop of a prograding shallow water delta system is best accessed by the footpath leading off the B6114 Mirfield Road by the Eurogas Depot. The outcrop is orientated north-northeast–south-southwest and consists of some 15 m of black shale coarsening upwards at the top into a 30 cm thick zone of silty shale and ripple cross-laminated micaceous siltstone and fine sandstone, sharply overlain by the 80 Yard Rock ([[:File:YGS_YORKROCK_FIG_09_02.jpg|Figure 9.2]]d) which are only accessible at the southernmost end of the outcrop. The black shales are usually finely laminated and contain ironstone nodules and nodular layers that decrease in thickness and abundance upward through the succession, a thin coal seam, and 3 thin non-marine bivalve bands ([[:File:YGS_YORKROCK_FIG_09_02.jpg|Figure 9.2]]d). The overlying 80 Yard Rock comprises fine, locally burrowed, micaceous sandstones, containing ripple cross-lamination with some plane lamination, low-angle lamination and cross-stratification deposited by currents flowing to the southwest. The sequence occurs at the top of the ''Anthraconaia lenisulcata ''non-marine bivalve '''Biozone''', and is interpreted as the prodelta shales and delta front sands of a prograding shallow water delta system.
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This outcrop of a prograding shallow water delta system is best accessed by the footpath leading off the B6114 Mirfield Road by the Eurogas Depot. The outcrop is orientated north-northeast–south-southwest and consists of some 15 m of black shale coarsening upwards at the top into a 30 cm thick zone of silty shale and ripple cross-laminated micaceous siltstone and fine sandstone, sharply overlain by the 80 Yard Rock ([[:File:YGS_YORKROCK_FIG_09_02.jpg|Figure 9.2]]d) which are only accessible at the southernmost end of the outcrop. The black shales are usually finely laminated and contain ironstone nodules and nodular layers that decrease in thickness and abundance upward through the succession, a thin coal seam, and 3 thin non-marine bivalve bands ([[:File:YGS_YORKROCK_FIG_09_02.jpg|Figure 9.2]]d). The overlying 80 Yard Rock comprises fine, locally burrowed, micaceous sandstones, containing ripple cross- lamination with some plane lamination, low-angle lamination and cross-stratification deposited by currents flowing to the southwest. The sequence occurs at the top of the ''Anthraconaia lenisulcata ''non- marine bivalve Biozone, and is interpreted as the prodelta shales and delta front sands of a prograding shallow water delta system.
  
 
== [[Yorkshire rocks and landscape: a field guide#Glossary|Glossary]] ==
 
== [[Yorkshire rocks and landscape: a field guide#Glossary|Glossary]] ==
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{{EWwalks}}
 
{{EWwalks}}
  
[[Category:Yorkshire rocks and landscape: a field guide ]]
 
 
[[Category:8. The Pennines and adjacent areas]]
 
[[Category:8. The Pennines and adjacent areas]]

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