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: P

Porth Amlwch Car Park

Gwryd Pennant Sandstone

  • Structure
  • Sandstone
  • 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 Gwryd Pennant Sandstone in Porth Amlwch Car Park.

Lower Carboniferous sandstone, quarried at Gwrhyd, Rhiwfawr, West Glamorgan, Wales. Nearest stop: Llanfairpwllgwyngyll.

This stone is older than it looks — worth five minutes if you're nearby.
https://www.londonpavementgeology.co.uk/location/3692-porth-amlwch-car-park/

Location Details

Back to Map

Location of Geological Feature
Pedestrian areas of the car park are paved with riven sandstone slabs, which preserve very clear ripples.
Rock Type
Sandstone
Geological Age
Lower Carboniferous
Quarry Location
Gwrhyd, Rhiwfawr, West Glamorgan, Wales
Category
Structure
Nearest station
Llanfairpwllgwyngyll
Address
Quay Street LL68 9HD
Date of build
2010s
Find out more
Stone identified by Ruth Siddall
Porth Amlwch Car Park — Gwryd Pennant Sandstone
Gwryd Pennant Sandstone at Porth Amlwch Car Park
Gwryd Pennant Sandstone at Porth Amlwch Car Park (detail 2)
Gwryd Pennant Sandstone at Porth Amlwch Car Park (detail 3)
    Entry submitted by Ruth Siddall

Nearby

The closest other recorded buildings.

  • Porth Amlwch Harbour WallGwna Greenschist230 m · about 4 min walk
  • Lime KilnGwna Greenschist310 m · about 5 min walk
  • Geo Mon Geo Clock330 m · about 5 min walk
  • Gate PostMoelfre Limestone330 m · about 5 min walk
  • Watch Tower Geo Mon OfficesMoelfre Limestone340 m · about 5 min walk
  • St Eleth's ChurchAnglesey Grits740 m · about 12 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.