Field Trip: Osmington Mills, Dorset

Leader: Alan Holiday, Dorset Geologists’ Association Group

Entry Fee

Members: Free

Visitors: £3.00

Date and Time



Osmington Mills, Mills Road, Osmington, Dorset, DT3 6HA

Field Trip Description

We will be working west and east of Osmington Mills along the beach. West of Osmington Mills the beach is shingle but east it is boulder-strewn with dipping ledges. The succession seen is Oxford Clay, Corallian, Kimmeridge Clay with unconformable Upper Greensand brought down in landslips. At low tide, folded Corallian strata can be seen including Osmington Oolite in wave-cut surfaces. There is also faulting. On the beach west of Osmington Mills the boundary between the Corallian and Kimmeridge Clay can be seen. There is abundant landslip material especially Osmington Oolite, Kimmeridge Clay and Upper Greensand. To the east of Osmington Mills the Corallian succession dips gently eastwards to Ringstead and the whole succession is exposed on the beach and in the cliffs. Sedimentological and trace fossil features are outstanding. Historically this area was important because of the discovery of oil seeps which resulted in the exploration for oil in southern England.

Meet at 11:00 a.m. Smugglers Car Park G.R. SY735816. Hard hats, boots and a packed lunch are required. Wecan provide some hard hats but please bring your own if you can.

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.