The Community comprises Gellideg and Heolgerrig on the western margins of Merthyr Tydfil all bordering the Geopark.

The lie of the land

The community ranges in height from around 160m beside the Afon Taf to just over 380m at Bryn Du (SO 000080).

It is drained by the Afon Taf and its tributary the Nant Ffrwd.

Solid rocks

The area is underlain by mudstones from the Lower and Middle Coal Measures together with some of Namurian age in the north.  The Coal Measures contain numerous coal seams.  The rocks dip gently in a generally southerly direction.

Legacy of the Ice Ages

The area is plastered with glacial till.

Archaeology

There is a scatter of cairns on the slopes of Bryn Du.

Maps

Geology

Sheet 231 'Merthyr Tydfil' of the British Geological Survey’s 1:50,000 map series of England and Wales gives full coverage of both the bedrock geology and superficial deposits of the Community area.  It is available in two editions. BGS publishes a 'memoir' to accompany these maps.

General

The following Ordnance Survey maps cover the Community:

• Landranger sheet 160 'Brecon Beacons' (1:50,000 scale)
• Explorer sheet OL12 'Brecon Beacons National Park/Western area' (1:25,000 scale)

Public transport

Various bus services operate within the Merthyr Tydfil area and the town is served by a railway station.

See Traveline Cymru for bus and train services including stops, timetables and route-planning information.