Foulport Mudstone Member

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Foulport Mudstone Member (FMN), Carboniferous, Midland Valley of Scotland

Foulport Mudstone Member is part of the Kinnesswood Formation.

Name

From Foul Port, Millport Bay, Great Cumbrae, Strathclyde.

Lithology

Red-brown silty mudstone with a few sandstones and beds with nodules of pedogenic limestone. See Paterson and Hall (1986)[1]; BGS (in press); BGS (in preparation).

Stratotype

The type area is the coast section at Foul Port (NS 157 546), Millport Bay, Great Cumbrae, Strathclyde.

Lower and upper boundaries

The lower boundary is conformable on the underlying Doughend Sandstone Member. It is marked by a change from yellow sandstone with a few concretionary nodules to red-brown mudstone and siltstone of the Foulport Mudstone Member (Monro, 1999; BGS in preparation).

The upper boundary is conformable and overlain by variegated sandstones with concretions of the West Bay Cornstone Member (Figure 6, Column 2).

Distribution and regional correlation

Cumbrae isles, Strathclyde

Thickness

About 200 m. BGS (2008)[2] gave a generalised thickness of 198 m for the member.

Age

Late Devonian? to Courceyan

References

  1. Paterson, I B and Hall, I H S, 1986. Lithostratigraphy of the late Devonian and early Carboniferous rocks in the Midland Valley of Scotland. British Geological Survey Report, 18/3.
  2. British Geological Survey.2008.Dunoon and Millport. Scotland Sheet 29E with part of 21E. Bedrock and Superficial Deposits. 1:50.000. (Keyworth, Nottingham: British Geological Survey.)

Bibliography

British Geological Survey. Irvine. Scotland Sheet 22W and part of 21E. Bedrock. 1:50 000 Geology Series. (Keyworth, Nottingham: British Geological Survey.)

Paterson, I B and Hall, I H S, 1986. Lithostratigraphy of the late Devonian and early Carboniferous rocks in the Midland Valley of Scotland. British Geological Survey Report, 18/3.

British Geological Survey. Dunoon and Millport. Scotland Sheet 29E and part of 21E. Bedrock. 1:50 000 Geology Series. (Keyworth, Nottingham: British Geological Survey.)