A public record of the stone in your built environmentExplore the mapBrowse all locationsFor researchersAbout the project
London Pavement Geology — home
Submit a location

Now extended for the rest of the UK

  • Explore
    • Map of all sites
    • Search Locations
  • Browse
  • Submit a Location
  • About
    • About this project
    • Project History
    • Further Reading
    • Useful Links
    • Mobile App
  • Contact

Categories

AllIgneousMetamorphicSedimentaryFossilStructure
 
 
 

Home/Explore the map/Browse A–Z: L

Llan Bach

Penmon Limestone

  • Fossil
  • Limestone
  • Lower Carboniferous

This stone is older than it looks. Send it to someone five minutes away.

  • WhatsApp (opens in a new tab)
  • Bluesky (opens in a new tab)
  • X (opens in a new tab)
  • Facebook (opens in a new tab)
  • Email

See the message

Just found Penmon Limestone in Llan Bach.

Lower Carboniferous limestone, quarried at Penmon, Anglesey, Wales, UK. Nearest stop: Llanfair PG.

This stone is older than it looks — worth five minutes if you're nearby.
https://www.londonpavementgeology.co.uk/location/4782-llan-bach/

Location Details

Back to Map

Location of Geological Feature
The stone around the doorway contains large brachiopod fossils of Daviesiella species.
Fossils
Gigantproductus brachiopods
Rock Type
Limestone
Geological Age
Lower Carboniferous
Quarry Location
Penmon, Anglesey, Wales, UK
Category
Fossil
Nearest station
Llanfair PG
Address
Llangristiolus LL77 7YE
Date of build
19th Century
Find out more
Visited on Welsh Stone Forum Fieldtrip, September 2022, wherein the stones were examined and identified.
Llan Bach — Penmon Limestone
Penmon Limestone at Llan Bach
Penmon Limestone at Llan Bach (detail 2)
Penmon Limestone at Llan Bach (detail 3)
    Entry submitted by Ruth Siddall

More stone at Llan Bach

  • Basement Beds Grits

Nearby

The closest other recorded buildings.

  • War Memorial Llangristiolus ChurchCornish Granite10 m · about 1 min walk
  • Llangristiolus ChurchAnglesey Grits20 m · about 1 min walk
  • Edward Greenly's Grave, Llangristiolus ChurchCoastal Red Granite30 m · about 1 min walk
  • HSBC BankPenmon Limestone2.3 km · about 36 min walk
  • The Bull HotelPenmon Limestone2.3 km · about 36 min walk
  • Rayner Memorial Clock TowerPeterhead Granite2.3 km · about 37 min walk

Suggest an Edit


London Pavement Geology

A public record of the stone in your built environment.

Like the site? Buy us a coffee

Explore

Map of all sitesSearch locationsBrowse every location

Contribute

Submit a locationContact us

About

About this projectProject historyFurther readingUseful links

Funding, sponsorship and supporting institutions

  • Marelambis Ltd.
  • University College London
  • Petroleum Exploration Society of Great Britain
  • Geologists' Association Curry Fund
  • Geoscience Wales
  • The Geological Society
  • London Geodiversity Partnership

With donations from individuals in the oil and gas industry who wish to remain anonymous.

Building stone data by Ruth Siddall, Dave Wallis and contributors. Project founded by Dave Wallis.

Privacy policyCookie policyTerms© 2026 London Pavement GeologyWeb design by Livetech

We would like to use Google Analytics to see which pages people find useful. It sets cookies in your browser, so we only do it if you say yes. Nothing about you is identified individually. What we use and why.