Nolton Haven ironstone pebbles in channel lag deposits

Nolton Haven to Newgale
The small Nolton-Newgale coalfield is separated by faulting from the main Pembrokeshire coalfield. It lies mostly within Pennant Sandstone Formation of the Upper Coal Measures rocks.

The cliffs of Nolton Haven expose predominantly deltaic channel sandstones, often with highly erosive bases with coarse, rip-up, channel-lag deposits. The general dip is around 20° to the south-west.

This photo shows a close-up view the erosive channel-lag deposits with a prominent layer of ironstone pebbles. The lens cap is 72 mm in diameter.

Amelia has particularly liked this photo

Comments

Amelia ^club

The lens cap certainly gives me the idea of the scale here.

4 years ago.

Earthwatcher ^club has replied to Amelia ^club

Yes - they are large pebbles and cobbles. Quite a fast, high-energy current needed to shift those, especially as the ironstone is quite dense.

4 years ago.

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Pembrokeshire geology Pembrokeshire geology

Pembrokeshire Pembrokeshire

Coastal Coastal

Rocks, minerals and fossils Rocks, minerals and fossils

Sedimentary structures Sedimentary structures

Rochers / Rocks Rochers / Rocks

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Nolton Haven ironstone pebbles in channel lag deposits

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