Marros Group

Marros Group shale map

Geology of the Marros Group

The Marros Group consists of siliceous mudstones and locally quartz rich sandstones and conglomerates.

See also the Marros Group in the BGS lexicon of named rock units.

Area where the Marros Group is present

The Marros Group is present from Pembrokeshire throughout southern Wales and east of the Bristol Channel.

Elevation of the top of the Marros Group

120 yards north of Langum Ferry Quarries, Coedcanlass. Looking south east. P200369

The maximum height of the top of the Marros is about 400 lm above OD at outcrop in south Wales and is at its deepest in south Wales and to the east of the Bristol Channel, reaching depths of over 2500 m below OD.


Please contact Dr Rob Ward for more information.

Select another shale to view