Editing Geology and landscape of Holy Island and Bamburgh - an excursion

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To the northwest the sill is covered by sand, but reappears at a higher level as a 1.50 m fault scarp, perpendicular to the coastline, in which inclusions of shale can be seen. Towards the sea, the sill transgresses up through shale along a north–south line; this exposure is terminated by a fracture zone with several splay faults trending east-northeast. A second complex fracture zone occurs some 20–30 m further northwest, with the dips of coarse sandstones changing from 35° east to 20° northwest across the fault zone.
 
To the northwest the sill is covered by sand, but reappears at a higher level as a 1.50 m fault scarp, perpendicular to the coastline, in which inclusions of shale can be seen. Towards the sea, the sill transgresses up through shale along a north–south line; this exposure is terminated by a fracture zone with several splay faults trending east-northeast. A second complex fracture zone occurs some 20–30 m further northwest, with the dips of coarse sandstones changing from 35° east to 20° northwest across the fault zone.
  
==== Locality 13, Stag Rock [NU 175 358] ====
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==== Locality 13, Stag Rock [NU 175 358] ====
  
 
This almost vertical exposure, trending almost due east, is ornamented by the painted figure of a stag. Adjacent to the lighthouse the Whin Sill has been injected into shale above the Budle Limestone, but halfway to Stag Rock the sill has transgressed into shales underlying the limestone, which is now on the dip slope above the sill. Further out towards the sea the Budle Limestone is again found below the sill. Northwest of the lighthouse the limestone, in an anticline, again rests on the sill.
 
This almost vertical exposure, trending almost due east, is ornamented by the painted figure of a stag. Adjacent to the lighthouse the Whin Sill has been injected into shale above the Budle Limestone, but halfway to Stag Rock the sill has transgressed into shales underlying the limestone, which is now on the dip slope above the sill. Further out towards the sea the Budle Limestone is again found below the sill. Northwest of the lighthouse the limestone, in an anticline, again rests on the sill.
  
==== Locality 14, [NU 172 360] ====
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==== Locality 14, [NU 172 360] ====
  
Here the sill contains a large basin-shaped limestone inclusion some 1.5 m thick and 20 m in diameter, whilst 300 m further west [NU 171 360], the Whin Sill and the overlying limestone have been polished and etched by wind-blown sand.
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Here the sill contains a large basin-shaped limestone inclusion some 1.5 thick and 20 m in diameter, whilst 300 m further west [NU 171 360], the Whin Sill and the overlying limestone have been polished and etched by wind-blown sand.
  
 
== [[Northumbrian rocks and landscape: a field guide#Glossary|Glossary]] ==
 
== [[Northumbrian rocks and landscape: a field guide#Glossary|Glossary]] ==

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