Those 47 RIGS (regionally important geodiversity sites) within Fforest Fawr Geopark are listed first, followed by those in the rest of the Bannau Brycheiniog (formerly Brecon Beacons) National Park. All are to be found (though not identified) on OS 1:25,000 scale Explorer map sheet OL12 unless otherwise noted*
- Aberbran to Abercamlais Terraces
◦ OS grid ref: SN 970292
◦ RIGS category: Scientific, Educational
◦ Earth science interest: geomorphology, sedimentology
◦ Unitary authority: POWYS - Afon Hepste & Afon Mellte Karst
◦ OS grid ref: SN 941122, SN952111, SN 933121
◦ RIGS category: Scientific, Educational, Aesthetic
◦ Earth science interest: karst, geomorphology
◦ Unitary authority: POWYS - Afon y Waen
◦ OS grid ref: SN 971156 to SN 974 139
◦ RIGS category: Scientific, Aesthetic
◦ Earth science interest: stratigraphy, palaeontology
◦ Unitary authority: POWYS - Allt Troedrhiwfelen Stream Section
◦ OS grid ref: SN 785342 to SN 789339
◦ RIGS category: Scientific
◦ Earth science interest: stratigraphy, sedimentology, palaeontology
◦ Unitary authority: POWYS - Blaen Senni
◦ OS grid ref: SN 910194
◦ RIGS category: Scientific, Educational, Aesthetic
◦ Earth science interest: Quaternary, geomorphology
◦ Unitary authority: POWYS - Blaen Taf Fawr Landslip
◦ OS grid ref: SN 991206
◦ RIGS category: Scientific
◦ Earth science interest: landslip
◦ Unitary authority: POWYS - Breinant
◦ OS grid ref: SN 652224 to SN 658223
◦ RIGS category: Scientific
◦ Earth science interest: stratigraphy
◦ Unitary authority: CARMARTHENSHIRE - Carn Pen-y-clogau
◦ OS grid ref: SN 722186
◦ RIGS category: Scientific, Educational, Aesthetic
◦ Earth science interest: geomorphology
◦ Unitary authority: CARMARTHENSHIRE - Carreg Cennen Castle
◦ OS grid ref: SN 668191 *(partly on OS Exp186)
◦ RIGS category: Scientific, Educational, Aesthetic, Historical
◦ Earth science interest: stratigraphy, karst, structure
◦ Unitary authority: CARMARTHENSHIRE - Carreg yr Ogof
◦ OS grid ref: SN 778214
◦ RIGS category: Scientific, Educational
◦ Earth science interest: stratigraphy, structure, sedimentology, geomorphology
◦ Unitary authority: CARMARTHENSHIRE - Cefn Crai
◦ OS grid ref: SN 888282
◦ RIGS category: Scientific
◦ Earth science interest: stratigraphy, sedimentology
◦ Unitary authority: POWYS - Cefn Cul
◦ OS grid ref: SO 016196
◦ RIGS category: Scientific, Educational, Aesthetic
◦ Earth science interest: Quaternary, geomorphology
◦ Unitary authority: POWYS - Cil-maen-llwyd Quarry (Long Quarry)
◦ OS grid ref: SN 665207 *(on OS Exp186)
◦ RIGS category: Scientific, Educational
◦ Earth science interest: stratigraphy, palaeontology, sedimentology, industry
◦ Unitary authority: CARMARTHENSHIRE - Coed Duon
◦ OS grid ref: SN 709255
◦ RIGS category: Scientific, Aesthetic
◦ Earth science interest: stratigraphy
◦ Unitary authority: CARMARTHENSHIRE - Corn Du & Pen y Fan
◦ OS grid ref: SO 002216 to SO 024215
◦ RIGS category: Scientific, Aesthetic
◦ Earth science interest: stratigraphy, sedimentology
◦ Unitary authority: POWYS - Cradoc Moraine
◦ OS grid ref: SO 008305
◦ RIGS category: Scientific, Historical
◦ Earth science interest: geomorphology, sedimentology
◦ Unitary authority: POWYS - Craig Cwm-du
◦ OS grid ref: SN 942214
◦ RIGS category: Scientific, Educational, Aesthetic
◦ Earth science interest: Quaternary, geomorphology
◦ Unitary authority: POWYS - Craig Derlwyn Quarry
◦ OS grid ref: SN 720160
◦ RIGS category: Scientific, Educational
◦ Earth science interest: stratigraphy
◦ Unitary authority: CARMARTHENSHIRE - Craig y fro Ridge Features
◦ OS grid ref: SN 974208
◦ RIGS category: Scientific, Educational
◦ Earth science interest: geomorphology
◦ Unitary authority: POWYS - Crwcas
◦ OS grid ref: SO 041276
◦ RIGS category: Scientific
◦ Earth science interest: stratigraphy, palaeontology
◦ Unitary authority: POWYS - Cwm Crew
◦ OS grid ref: SO 008198
◦ RIGS category: Scientific, Educational, Aesthetic
◦ Earth science interest: Quaternary, geomorphology
◦ Unitary authority: POWYS - Cwm Cynwyn
◦ OS grid ref: SO 034212
◦ RIGS category: Scientific, Educational, Aesthetic
◦ Earth science interest: Quaternary, geomorphology
◦ Unitary authority: POWYS - Dan-yr-Ogof
◦ OS grid ref: SN 835159
◦ RIGS category: Scientific, Educational, Aesthetic
◦ Earth science interest: karst, Variscan structures, lower Carboniferous stratigraphy
◦ Unitary authority: POWYS - Dinas Silica Mines
◦ OS grid ref: SN 916079
◦ RIGS category: Aesthetic, Historical
◦ Earth science interest: stratigraphy, mine, quarries, landscape, industrial, historical
◦ Unitary authority: RHONDDA CYNON TAF POWYS - Fan Bwlch Chwyth
◦ OS grid ref: SN 916224
◦ RIGS category: Scientific, Educational, Aesthetic
◦ Earth science interest: Quaternary, geomorphology
◦ Unitary authority: POWYS - Fan Dringarth Landslide
◦ OS grid ref: SN 943193
◦ RIGS category: Scientific, Educational
◦ Earth science interest: sedimentology, geomorphology
◦ Unitary authority: POWYS - Fan Gyhirych
◦ OS grid ref: SN 887194
◦ RIGS category: Scientific, Educational, Aesthetic
◦ Earth science interest: Quaternary, geomorphology
◦ Unitary authority: POWYS - Ffrwdgrech Moraine
◦ OS grid ref: SO 042279
◦ RIGS category: Scientific
◦ Earth science interest: sedimentology, geomorphology
◦ Unitary authority: POWYS - Foel Fawr
◦ OS grid ref: SN 735186
◦ RIGS category: Scientific, Aesthetic
◦ Earth science interest: karst
◦ Unitary authority: CARMARTHENSHIRE - Garn Goch
◦ OS grid ref: SN 689242
◦ RIGS category: Scientific, Aesthetic
◦ Earth science interest: stratigraphy, history
◦ Unitary authority: CARMARTHENSHIRE - Henllys Vale
◦ OS grid ref: SN 762137
◦ RIGS category: Scientific, Educational, Historical
◦ Earth science interest: stratigraphy, industry
◦ Unitary authority: CARMARTHENSHIRE, POWYS - Herbert’s Quarry
◦ OS grid ref: SN 734191
◦ RIGS category: Scientific, Educational, Aesthetic, Historical
◦ Earth science interest: stratigraphy, industry
◦ Unitary authority: CARMARTHENSHIRE - Llanfrynach
◦ OS grid ref: SO 084254
◦ RIGS category: Scientific
◦ Earth science interest: sedimentology, geomorphology
◦ Unitary authority: POWYS - Llygad Llwchwr
◦ OS grid ref: SN 669178 *(partly on OS Exp178)
◦ RIGS category: Scientific, Aesthetic
◦ Earth science interest: karst, industry
◦ Unitary authority: CARMARTHENSHIRE - Llywel & Twyn-y-felin
◦ OS grid ref: SN 872300
◦ RIGS category: Scientific
◦ Earth science interest: stratigraphy, sedimentology
◦ Unitary authority: POWYS - Maen Du Well
◦ OS grid ref: SO 039296
◦ RIGS category: Scientific, Historical
◦ Earth science interest: structure, geomorphology, spring
◦ Unitary authority: POWYS - Mynydd Myddfai Tilestone Quarries
◦ OS grid ref: SN 787282 – SN 819303
◦ RIGS category: Scientific, Educational
◦ Earth science interest: structure, geomorphology
◦ Unitary authority: CARMARTHENSHIRE - Nant Ffrwd
◦ OS grid ref: SO 029076
◦ RIGS category: Scientific, Educational
◦ Earth science interest: geomorphology, sedimentology,
◦ Unitary authority: MERTHYR TYDFIL - Ogof Ffynnon Ddu
◦ OS grid ref: SN 869158
◦ RIGS category: Scientific, Educational, Historical
◦ Earth science interest: karst, structure, industry
◦ Unitary authority: POWYS - Pantymaes Quarry
◦ OS grid ref: SN 913264
◦ RIGS category: Scientific, Educational
◦ Earth science interest: stratigraphy, sedimentology, palaeontology
◦ Unitary authority: POWYS - Penlan Quarry, Penlantelych Farm
◦ OS grid ref: SN 784333
◦ RIGS category: Scientific, Educational
◦ Earth science interest: stratigraphy, structure, palaeontology
◦ Unitary authority: CARMARTHENSHIRE - Pen Milan
◦ OS grid ref: SN 998227
◦ RIGS category: Scientific, Educational, Aesthetic
◦ Earth science interest: Quaternary, geomorphology
◦ Unitary authority: POWYS - Porth yr Ogof
◦ OS grid ref: SN 928124
◦ RIGS category: Scientific, Educational, Aesthetic, Historical
◦ Earth science interest: karst
◦ Unitary authority: POWYS - Priory Groves
◦ OS grid ref: SO 045290
◦ RIGS category: Scientific, Educational, Aesthetic, Historical
◦ Earth science interest: stratigraphy, sedimentology, geomorphology
◦ Unitary authority: POWYS - Pwll-calch Quarried Crags
◦ OS grid ref: SN 767285
◦ RIGS category: Scientific
◦ Earth science interest: stratigraphy, palaeontology, sedimentology
◦ Unitary authority: CARMARTHENSHIRE - Tair Carn Uchaf
◦ OS grid ref: SN 694175
◦ RIGS category: Scientific, Educational, Aesthetic
◦ Earth science interest: geomorphology
◦ Unitary authority: CARMARTHENSHIRE - Upper Cefn Cerrig Road & Farm Section
◦ OS grid ref: SN 774323 – SN 775322
◦ RIGS category: Scientific, Historical
◦ Earth science interest: stratigraphy, palaeontology, history, sedimentology
◦ Unitary authority: CARMARTHENSHIRE
The following 36 RIGS have been designated in the east of the National Park, outside of Fforest Fawr Geopark. All are to be found (though not identified) on OS 1:25,000 scale Explorer map sheet OL13 unless otherwise noted*
48. Abercriban Quarry
◦ OS grid ref: SN 066124 *(on OS ExpOL12)
◦ RIGS category: Scientific, Educational
◦ Earth science interest: stratigraphy, sedimentology
◦ Unitary authority: POWYS
49. Blaen Caerfanell
◦ OS grid ref: SN 054193 *(on OS ExpOL12)
◦ RIGS category: Scientific, Educational, Aesthetic
◦ Earth science interest: Quaternary, geomorphology
◦ Unitary authority: POWYS
50. Blaen Onneu Quarry
◦ OS grid ref: SN 154169
◦ RIGS category: Scientific, Educational
◦ Earth science interest: stratigraphy, palaeo-environments, sedimentology
◦ Unitary authority: POWYS
51. Blaen Pig and Canada Tips
◦ OS grid ref: SN 237116
◦ RIGS category: Scientific, Historical
◦ Earth science interest: stratigraphy, sedimentology, engineering geology, industry/history
◦ Unitary authority: MONMOUTHSHIRE, TORFAEN
52. Bloodstone
◦ OS grid ref: SN 283240
◦ RIGS category: Scientific
◦ Earth science interest: sedimentology, geomorphology
◦ Unitary authority: MONMOUTHSHIRE
53. Carno Adit & Ogof Carn
◦ OS grid ref: SN 164126
◦ RIGS category: Scientific, Historical
◦ Earth science interest: history, karst
◦ Unitary authority: BLAENAU GWENT
54. Clydach Halt Limeworks
◦ OS grid ref: SN 234128
◦ RIGS category: Scientific, Educational, Historical
◦ Earth science interest: stratigraphy, palaeo-environments, palaeontology
◦ Unitary authority: MONMOUTHSHIRE
55. Coed Pantydarren Quarries
◦ OS grid ref: SN 219138
◦ RIGS category: Scientific, Educational
◦ Earth science interest: stratigraphy, sedimentology, structure
◦ Unitary authority: MONMOUTHSHIRE
56. Craig-y-Gaer Quarry
◦ OS grid ref: SN 223132
◦ RIGS category: Scientific, Educational
◦ Earth science interest: stratigraphy, sedimentology, palaeontology
◦ Unitary authority: MONMOUTHSHIRE
57. Cusop Dingle
◦ OS grid ref: SO 233421 – SO 257384
◦ RIGS category: Scientific
◦ Earth science interest: stratigraphy, palaeo-environments, sedimentology
◦ Unitary authority: POWYS, HEREFORDSHIRE
58. Cwm Coed Spillway
◦ OS grid ref: SO 284210 – SO 307217
◦ RIGS category: Scientific
◦ Earth science interest: geomorphology
◦ Unitary authority: MONMOUTHSHIRE
59. Cwm Oergwm
◦ OS grid ref: SO 043204 *(on OS ExpOL12)
◦ RIGS category: Scientific, Educational, Aesthetic
◦ Earth science interest: Quaternary, geomorphology
◦ Unitary authority: POWYS
60. Cwm Pwllfa
◦ OS grid ref: SO 068207 *(on OS ExpOL12)
◦ RIGS category: Scientific, Educational, Aesthetic
◦ Earth science interest: Quaternary, geomorphology
◦ Unitary authority: POWYS
61. Darren-Cwmyoy Landslide
◦ OS grid ref: SO 299233
◦ RIGS category: Scientific
◦ Earth science interest: sedimentology, geomorphology
◦ Unitary authority: MONMOUTHSHIRE
62. Darren Ddu Tramway Quarries
◦ OS grid ref: SO 217127 – SO 222130
◦ RIGS category: Scientific, Educational
◦ Earth science interest: stratigraphy, sedimentology
◦ Unitary authority: MONMOUTHSHIRE
63. Drum and Monkey Quarry
◦ OS grid ref: SO 217127 – SO 219129
◦ RIGS category: Scientific, Educational
◦ Earth science interest: stratigraphy, sedimentology
◦ Unitary authority: MONMOUTHSHIRE
64. Dyffryn Crawnon
◦ OS grid ref: SO 095150 – SO 090155 *(on OS ExpOL12)
◦ RIGS category: Scientific, Educational
◦ Earth science interest: stratigraphy, sedimentology, palaeontology
◦ Unitary authority: POWYS
65. Dyffryn Mawr
◦ OS grid ref: SO 251157
◦ RIGS category: Scientific
◦ Earth science interest: sedimentology, geomorphology
◦ Unitary authority: MONMOUTHSHIRE
66. Gilwern & Pwll Du Quarries
◦ OS grid ref: SO 247126 – SO 249117
◦ RIGS category: Scientific, Educational, Historical
◦ Earth science interest: stratigraphy, palaeontology, palaeo- environments, sedimentology
◦ Unitary authority: MONMOUTHSHIRE
67. The Hermitage
◦ OS grid ref: SO 227251
◦ RIGS category: Scientific
◦ Earth science interest: sedimentology, geomorphology
◦ Unitary authority: MONMOUTHSHIRE
68. Llanddetti Moraine
◦ OS grid ref: SO 124217
◦ RIGS category: Scientific
◦ Earth science interest: geomorphology
◦ Unitary authority: POWYS
69. Llanfellte
◦ OS grid ref: SO 130215 to 135254
◦ RIGS category: Scientific
◦ Earth science interest: geomorphology
◦ Unitary authority: POWYS
70. Maes-y-ffin Cwm
◦ OS grid ref: SO 254307
◦ RIGS category: Scientific
◦ Earth science interest: geomorphology
◦ Unitary authority: MONMOUTHSHIRE, POWYS
71. Mynydd Llangatwg Caves (incl. Clydach Gorge)
◦ OS grid ref: SO (multiple localities)
◦ RIGS category: Educational, Aesthetic, Historical
◦ Earth science interest: karst, landscape
◦ Unitary authority: POWYS, MONMOUTHSHIRE, BLAENAU GWENT
72. Mynydd Llangynidr
◦ OS grid ref: SO 148136
◦ RIGS category: Scientific, Educational, Aesthetic, Historical
◦ Earth science interest: geomorphology, karst
◦ Unitary authority: POWYS, BLAENAU GWENT
73. Mynydd Llangynidr Caves
◦ OS grid ref: SO 128152, SO 129150, SO 140153, SO 164127
◦ RIGS category: Scientific, Aesthetic, Historical
◦ Earth science interest: karst, geomorphology
◦ Unitary authority: POWYS, BLAENAU GWENT
74. Nevill Hall
◦ OS grid ref: SO 284143
◦ RIGS category: Scientific
◦ Earth science interest: sedimentology, geomorphology
◦ Unitary authority: MONMOUTHSHIRE
75. Ogof Draenen
◦ OS grid ref: SO 254114
◦ RIGS category: Scientific, Educational, Aesthetic, Historical
◦ Earth science interest: stratigraphy, karst
◦ Unitary authority: MONMOUTHSHIRE
76. Pant Mawr Quarry, Clydach
◦ OS grid ref: SO 220131
◦ RIGS category: Scientific, Educational
◦ Earth science interest: stratigraphy, sedimentology
◦ Unitary authority: MONMOUTHSHIRE
77. Pen Cerrig-calch
◦ OS grid ref: SO 218223
◦ RIGS category: Scientific, Aesthetic
◦ Earth science interest: stratigraphy, structure
◦ Unitary authority: POWYS
78. Primrose Hill Quarry
◦ OS grid ref: SO 207200
◦ RIGS category: Scientific
◦ Earth science interest: stratigraphy, palaeontology
◦ Unitary authority: POWYS
79. Pwll y Wrach
◦ OS grid ref: SO 162328
◦ RIGS category: Scientific, Educational
◦ Earth science interest: stratigraphy, sedimentology
◦ Unitary authority: POWYS
80. Stanton Fluvio-glacial Terrace
◦ OS grid ref: SO 311215 – SO 324208
◦ RIGS category: Scientific
◦ Earth science interest: sedimentology, geomorphology
◦ Unitary authority: MONMOUTHSHIRE
81. Table Mountain & the Darren Landslip
◦ OS grid ref: SO 225207 – SO 212212
◦ RIGS category: Scientific, Educational, Aesthetic
◦ Earth science interest: stratigraphy, landslide
◦ Unitary authority: POWYS
82. Tremynfa Quarry
◦ OS grid ref: SO 159223
◦ RIGS category: Scientific
◦ Earth science interest: stratigraphy, sedimentology
◦ Unitary authority: POWYS
83. Ysgyryd Fawr
◦ OS grid ref: SO 330178
◦ RIGS category: Scientific, Aesthetic
◦ Earth science interest: stratigraphy, landslide
◦ Unitary authority: MONMOUTHSHIRE