West of Telpyn Point - fault in Telpyn Point Sandstone group

Telpyn Point to Amroth

Between Amroth and Telpyn Point, magnificent cliff sections expose the upper Namurian sequence of deltaic channel-fill sandstones and intervening shale sequences.

This photo shows a normal fault (in the centre) downthrowing approx.10 m to the east (right).

The dark band just below the top of the cliff on the eastern side is a thin coaly horizon. Overlying this are mudstones of the Gastrioceras subcrenatum Marine Band which marks the base of the Coal Measures.

The main part of the cliff section is in the Telpyn Point Sandstone (formerly designated as the Upper Sandstone), the uppermost main sandstone in the Namurian, and originally known as the 'Farewell Rock', so called because exploratory boreholes and shafts for coal penetrating the sandstone would no longer encounter any workable coals. Underlying the sandstone is a shale sequence.

See notes for details.