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: R

Rayner Memorial Clock Tower

Penmon Limestone

  • Sedimentary
  • Limestone
  • Upper 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 Rayner Memorial Clock Tower.

Upper Carboniferous limestone, quarried at Penmon or Moelfre, Anglesey, Wales. Nearest stop: Llanfairpwllgwyngyll.

This stone is older than it looks — worth five minutes if you're nearby.
https://www.londonpavementgeology.co.uk/location/3710-rayner-memorial-clock-tower/

Location Details

Back to Map

Location of Geological Feature
Main building stone.
Fossils
Corals, crinoids, productid brachiopods.
Rock Type
Limestone
Geological Age
Upper Carboniferous
Quarry Location
Penmon or Moelfre, Anglesey, Wales
Category
Sedimentary
Nearest station
Llanfairpwllgwyngyll
Address
Bulkeley Square LL77 7LR
Building architect
John Douglas
Date of build
1902
Find out more
Stone identified by Ruth Siddall
Rayner Memorial Clock Tower — Penmon Limestone
Penmon Limestone at Rayner Memorial Clock Tower
Penmon Limestone at Rayner Memorial Clock Tower (detail 2)
Penmon Limestone at Rayner Memorial Clock Tower (detail 3)
    Entry submitted by Ruth Siddall

More stone at Rayner Memorial Clock Tower

  • Peterhead Granite

Nearby

The closest other recorded buildings.

  • The Bull HotelPenmon Limestone30 m · about 1 min walk
  • HSBC BankPenmon Limestone50 m · about 1 min walk
  • Oriel MonPenmon Limestone820 m · about 13 min walk
  • Llangristiolus ChurchHeather & Spotted Slate2.3 km · about 36 min walk
  • Edward Greenly's Grave, Llangristiolus ChurchCoastal Red Granite2.3 km · about 36 min walk
  • War Memorial Llangristiolus ChurchCornish Granite2.3 km · about 36 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.