Editing St Fergus (Annachie) - locality, Cainozoic of north-east Scotland

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(NK 100 537), the St Fergus Silt Formation is reported to rest on reddish brown diamicton (presumably Logie-Buchan Drift Group) that in turn overlies greyish green till. In another borehole immediately east of Annachie, red till is reported to overlie grey till, but to be capped by dark grey till (McMillan and Aitken, 1981). Both records suggest that Logie-Buchan Drift Group deposits could be locally present below the St Fergus Silt Formation. On the south-eastern side of the gas terminal, probably close to the former North Blackwater Farm (NK 100 537), the St Fergus Silt Formation is reported to rest on dark shelly till with chalk erratics (Hall and Jarvis 1989). Similar dark diamicton with chalk fragments and numerous erratics of granite, probably derived from the local, but unexposed, St Fergus Granite, has been seen in spoil heaps towards the sea. Wilson (1886) recorded a dark coloured till containing supposed Old Red Sandstone flagstone and marl erratics in the St Fergus area and an erratic of ooidal sandstone at Pittenheath (NK 100 550).
 
(NK 100 537), the St Fergus Silt Formation is reported to rest on reddish brown diamicton (presumably Logie-Buchan Drift Group) that in turn overlies greyish green till. In another borehole immediately east of Annachie, red till is reported to overlie grey till, but to be capped by dark grey till (McMillan and Aitken, 1981). Both records suggest that Logie-Buchan Drift Group deposits could be locally present below the St Fergus Silt Formation. On the south-eastern side of the gas terminal, probably close to the former North Blackwater Farm (NK 100 537), the St Fergus Silt Formation is reported to rest on dark shelly till with chalk erratics (Hall and Jarvis 1989). Similar dark diamicton with chalk fragments and numerous erratics of granite, probably derived from the local, but unexposed, St Fergus Granite, has been seen in spoil heaps towards the sea. Wilson (1886) recorded a dark coloured till containing supposed Old Red Sandstone flagstone and marl erratics in the St Fergus area and an erratic of ooidal sandstone at Pittenheath (NK 100 550).
  
The back feature of the Late-glacial raised beach located on Figure [[Media:P915312.png|(P915312)]] stands at just under 15 m above OD (NK 093 529) and is fronted by a platform up to 120 m wide. The platform is underlain by sand and gravel that passes seawards into silt. The latter is possibly the uppermost part of the St Fergus Silt Formation, which implies that the two deposits are roughly contemporaneous. The sand and gravel is disposed as ‘herring bone’ sets of cross-beds, suggesting intertidal deposition.
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The back feature of the Late-glacial raised beach located on Figure A1.13 stands at just under 15 m above OD (NK 093 529) and is fronted by a platform up to 120 m wide. The platform is underlain by sand and gravel that passes seawards into silt. The latter is possibly the uppermost part of the St Fergus Silt Formation, which implies that the two deposits are roughly contemporaneous. The sand and gravel is disposed as ‘herring bone’ sets of cross-beds, suggesting intertidal deposition.
  
 
== Discussion ==
 
== Discussion ==

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