Editing Mill of Dyce - locality, Cainozoic of north-east Scotland

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Several boreholes were sunk by BGS in the vicinity of the Mill of Dyce pit during 1984. Borehole NJ81SE17 to the east of the pit, sited on top of a dissected mound at 44 m OD, proved laminated, micaceous, pale grey-brown silt and clayey sand with scattered pebbles between 10.2 and 12.2 m depth overlying more than 7.9 m of sandy gravel. The laminated sediment was overlain by a 6.9 m-thick coarsening-upward sequence of sandy gravel that was overlain in turn by 1.3 m of clayey sand. Boreholes sited on the floodplain to the west of the site clearly show that this part of the Don valley occupies a glacially overdeepened basin, infilled by sandy silts, which in Borehole NJ81NE1 exceed 16.2 m in thickness. These silty deposits (Glen Dye Silts Formation) extend upstream from Mill of Dyce for a distance of at least 7.3 km (Aitken, 1991) and crop out in the frontal bluffs of terraces, on the north side of the valley, up to about 50 m above OD.
 
Several boreholes were sunk by BGS in the vicinity of the Mill of Dyce pit during 1984. Borehole NJ81SE17 to the east of the pit, sited on top of a dissected mound at 44 m OD, proved laminated, micaceous, pale grey-brown silt and clayey sand with scattered pebbles between 10.2 and 12.2 m depth overlying more than 7.9 m of sandy gravel. The laminated sediment was overlain by a 6.9 m-thick coarsening-upward sequence of sandy gravel that was overlain in turn by 1.3 m of clayey sand. Boreholes sited on the floodplain to the west of the site clearly show that this part of the Don valley occupies a glacially overdeepened basin, infilled by sandy silts, which in Borehole NJ81NE1 exceed 16.2 m in thickness. These silty deposits (Glen Dye Silts Formation) extend upstream from Mill of Dyce for a distance of at least 7.3 km (Aitken, 1991) and crop out in the frontal bluffs of terraces, on the north side of the valley, up to about 50 m above OD.
  
In many boreholes and trial pits, sited on the floodplain of the River Don near Kintore, the laminated silts are overlain by sands and gravels containing interbedded organic sediments (Auton and Crofts, 1986; Aitken, 1991). Palaeontological examination and radiocarbon dating indicate, however, that these organic sediments are of late Holocene rather than Windermere Interstadial age (see Site 20 [[Nether Daugh, Kintore - locality, Cainozoic of north-east Scotland|Nether Daugh]]).
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In many boreholes and trial pits, sited on the floodplain of the River Don near Kintore, the laminated silts are overlain by sands and gravels containing interbedded organic sediments (Auton and Crofts, 1986; Aitken, 1991). Palaeontological examination and radiocarbon dating indicate, however, that these organic sediments are of late Holocene rather than Windermere Interstadial age (see Site 20 Nether Daugh).
  
 
== Sedimentological interpretation of the Mill of Dyce sequence ==
 
== Sedimentological interpretation of the Mill of Dyce sequence ==

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