OUGS North West Branch
Pembrokeshire Field Trip
September 2002

In early September a group of us gathered in the Mariners' Hotel, Haverfordwest for a weekend of geological sightseeing. Our guide was John Downes, an OU tutor now living in the area.
Prior to the main trip two of us visited Ramsey Island, an RSPB Nature Reserve. Although most of the birds were still out at sea the geology was very good.

To see a geological map of Pembrokeshire, click here

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Bay erroded into the soft mudstones & shales between the trachyites of Carn Ysgubor (background) and the volcanics of Carn Llundiain (behind me).
Aber Mawr, Ramsey Island 		Remarkable weathering pattern in the shales on the cliff.
Aber Mawer shale 		Ramsey has a fine coastal heathland, now, unfortunately, extremly rare in Wales.
Aber Mawr and heather
The south of the island from Caer Lludain with St. David's Head and Carn Llidi in the background
South Ramsey 		Examining the rocks on Trynhwrddyn ( The Rams Nose). Alternating thin sandstones and shales riddled with quartz veins from a nearby fault zone - making it resistant to erosion.
Whitesands Bay 		Examining the quartz gabbro intrusion of Carn Llidi exposed at Penlledwen headland.
Penlledwen headland
Our webmaster, Michael Woods, and Steve Darlington enjoying the trip.
Web Master 		Layered Gabbro intrusion on St. Davids Head.<br >Ramsey Island in the background.
St. Davids Head 		On the layered gabbros of St. Davids Head with Carn Llidi in the background.
Carn Llidi
Martin Elsworth.