Field Trip: The Geology of Pembrokeshire

Leader: Sid Howells, Area Geologist, Countryside Council for Wales

Entry Fee

Members: Free

Visitors: £3.00

Date and Time



Twr-y-Felin Hotel, Ffordd Caerfai, St Davids, Haverfordwest SA62 6QT

Field Trip Description

This excursion will be based at Twr-y-Felin Hotel, St David’s. There are superb views of the St David’s Peninsula and St Bride’s Bay from the parapet of the old windmill which forms part of the hotel complex. The proceedings will commence with an introductory lecture.

On the first day of the excursion participants can walk along the Pembrokeshire Coast Path to view the classic features which are particularly well exposed in this beautiful coastline between Porthlyski and Caerbwdy Bay where the lower Cambrian sedimentary sequence is seen to rest unconformably on Precambrian igneous rocks. The relative ages of these rocks was the subject of a fierce controversy between Henry Hicks and Archibald Gieke. The total distance of the intended route is c. 9km (approx. 6 miles). There will be frequent, sometimes lengthy pauses to examine the numerous features of interest, but as the coastline is fairly rugged those wishing to complete the whole distance should be reasonably fit.

On the second day the Ordovician rocks of the North Pembrokeshire coast will be examined, including the layered gabbro of St David’s Head, fossiliferous black slates at Abereiddi Bay, and the volcanic rocks of the Strumble Peninsula. It will be necessary to use cars to travel between these localtions and the total distance to be walked will not exceed 6km (c.4 miles) but is perhaps equally demanding. Alternatives can be suggested for those who wish to complete only part of either day’s itinerary. The accomodation is within easy walking distance of Caerfai Bay and the centre of St David’s, with its fine cathedral and a variety of shops.

Meet at Twr-y-Felin Hotel in time for dinner on Friday 29th September.

Location Map

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Important Notice: Bath Geological Society Insurance

Each person attending a field meeting does so on the understanding that he/she attends at his/her own risk. The Bath Geological Society has Public Liability Insurance Cover for field and indoor meetings, but Personal Accident Cover and Personal Liability Cover remain the responsibility and personal choice of the participant.

There may be an element of appropriate cover included in house insurance or in travel insurance: although Bath Geological Society activities are not particularly dangerous members are advised to check whether exclusions apply to activities in which they plan to participate in case they wish to arrange further cover. An annual travel insurance may be the best solution for any member who regularly attends field events: this again is a matter of choice.

Please note however that all members participating in overseas events will be required to have travel insurance for the duration of the event: this is so that participants are covered for Medical, Repatriation and Personal Liability expenses. The Personal Accident element remains the personal choice of the member and again members are advised to check exclusions so that they can make an informed decision about the cover they want.