Field Trip: Mendip geology

Leader: Dr. Doug Robinson. University of Bristol

Entry Fee

Members: Free

Visitors: £3.00

Date and Time



Wookey Hole, Somerset

Field Trip Description

On this walk all the main rocks found in the Mendips will be seen, and used to interpret the geological history of the region. The Devonian, Portishead formation and Carboniferous limestone are exposed across the Pen Hill pericline. The Triassic Dolomitic conglomerates forms large fans of coarse debris that spread southward, and are interbedded with thick sequences of the finer grained sand and mud facies of the Mercia Mudstone. The late Triassic marks the change from continental to marine sequences, with deposition of mudstones and fine grained limestones of the Blue Lias formation. The youngest rocks are of mid Jurassic age with limestones and thin muds deposited around the islands of the Mendip archipelago.

The walk will start at 10.00a.m. and will take about 4 hours. It will follow public footpaths giving good to rough going, with an overall ascent of ~ 200m. Starting from Wookey Hole, past Arthur’s Point, and on along the southern slopes of Pen Hill, descending by way of Prior’s hill, crossing the A37, and along the edge of Stoberry Park and in the Wells square on a market day.

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.