Editing Upper Carboniferous of the Halifax area - an excursion

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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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