Category:Geologic formations in Wales

• Geologic formations in Wales by geochronology (13 C)

*

• Fossil bearing geologic formations in Wales (17 C)

A

• Aber Mawr Formation (1 F)
• Allt Ddu Formation (2 C, 1 F)
• Amlwch Beds (2 F)

B

• Bedded Pyroclastic Formation (1 F)
• Bettisfield Formation (1 C)
• Black Rock Limestone (5 C, 2 F)
• Blue Lias (5 C, 37 F)
• Broad Vein Mudstone Formation (1 C, 1 F)
• Brownstones Formation (1 C, 6 F)

C

• Caer Bwdy Bay Formation (1 C)
• Caerbwdi Sandstone (1 C, 1 F)
• Caerfai Bay Formation (1 C)
• Capel Curig Volcanic Formation (1 F)
• Carnedd Iago Formation (1 C)
• Cefn Mawr Limestone Formation (1 C)
• Coed-yr-Allt Formation (1 C)
• Conwy Castle Grit (1 F)
• Conwy Rhyolite Formation (1 C, 4 F)
• Cwm Eigiau Formation (4 F)

D

• Dolhir Formation (1 F)

F

• Ffestiniog Flags (2 F)
• Foel Fras Volcanic Formation (1 C)
• Foel Grach Basalt Formation (1 C)

G

• Garnedd-Wen Formation (1 C, 1 F)
• Gelliswick Bay Formation (2 F)
• Glyn Gower Formation (1 C)
• Gully Oolite Formation (1 C, 3 F)
• Gwespyr Sandstone (2 C)
• Gwna Mélange (1 C, 1 F)

H

• Hells Mouth Grits (1 C, 1 F)
• High Tor Limestone (1 C, 1 F)
• Holywell Shale (1 C)
• Hunts Bay Oolite (3 F)

L

• Lingula Flags Formation (1 C, 2 F)
• Llanarmon Limestone Formation (1 C, 1 F)
• Llanbedr Formation (empty)
• Llanfallteg Formation (2 C, 1 F)
• Llanrian Volcanic Formation (1 C)
• Llanvirn-Caradoc Black Mudstone (1 C, 1 F)
• Llyn Conwy Formation (3 C)
• Loggerheads Limestone Formation (1 F)
• Lower Rhyolitic Tuff Formation (4 F)

M

• Marchlyn Formation (1 F)
• May Hill Sandstone (2 C, 5 F)

N

• Nant Ffrancon Formation (3 F)
• Nant Hir Formation (1 C)
• Nantglyn Flags (2 F)
• Nnat Ffrancon Formation (1 F)

O

• Ogof Golchfa Formation (1 F)
• Old Red Sandstone in Wales (13 C, 15 F)

P

• Penmon Limestone (2 C, 1 F)
• Plateau Beds Formation (2 F)
• Porth Clais Formation (1 C)

R

• Red Wharf Limestone Formation (1 C, 2 F)
• Rhinog Formation (1 C)
• Rhoscolyn Formation (1 C, 2 F)
• Riwlas Formation (1 C)

S

• Sandy Haven Formation (1 C)
• Senni Beds, Old Red Sandstone (3 C, 2 F)
• South Stack Formation (1 C, 7 F)
• St Non’s Formation (1 C)
• St. Maughan's Formation (3 C, 4 F)
• Sully Beds (1 C)
• Sutton Stone (2 F)

T

• Tal y Fan Volcanic Formation (1 C, 4 F)
• Telpyn Point Sandstone Formation (1 C)
• Twrch Sandstone (9 F)

U

• Upper Rhyolitic Tuff Formation (1 F)

W

• Woolhope Limestone (7 F)