Abbotsgrange Silt MemberName
93000Province: On the southern side of the Forth estuary, from east of Kincardine Bridge to Bo'ness.
Geologic Age: Tarantian Age
Other: Clay, sand and silt and trace gravel. Superficial deposits. Occurs onshore. Formed during the Devensian Stage (Quaternary Period) (.116-.0118 Ma BP). Marine, well-bedded, very micaceous, black, grey and browish grey, loose silts, with many laminae and thin beds of fine-grained sand and dark grey silty clay. The unit has clasts up to 8cm of coal, basalt, mudstone and quartzite near its sandy base suggestive of local erosion of underlying strata. The deposit is considered to be prodeltaic in origin. Veneer to 37m The relationship of the Abbotsgrange Silt Member (Forth Clay Formation) to the underlying Errol Clay Formation is probably unconformable. Never known to be in contact with the slightly older Kinneil Kerse Silt Member. Overlain unconformably by younger deposits such as the Letham Silt or Claret Clay members (Carse Clay Formation) or by the Bothkennar Gravel Member (Forth Clay Formation).
Usage: Current name
