Hot Deserts of the Past - 13th May

Since its formation some 400 million years ago, that part of the plate which became the British Isles has slowly ‘drifted’ northwards by the agency of plate tectonics from the southern hemisphere to its present position. In doing so, it has passed through both hot arid latitudes either side of the equator. This field-based day course looks at river channel and floodplain deposits of Silurian / Devonian age, and desert screes of Triassic age, which were laid down under such climates. The course focuses on two excellent exposures which are designated SSSIs by Natural England either side of the Severn estuary: Lydney Cliff (N of Chepstow - immature calcrete/dolocrete shown in photo) and Kilkenny Bay (near Portishead). In both exposures, contemporaneous calcareous fossil soils are preserved, which at Lydney are recognized as some of the best know in the world. Both sites are tidal; this date and times being suitable for safe visits.
A handout outlining the day’s programme, including location sketch maps, optional reading list, geological history, information on calcareous soil development, and the tutor’s logs of the strata will be forwarded to those enrolled.     
Please note that you would need to:
- Arrange your own transport (note the day involves crossing the old Severn Bridge and bridge toll)
- Bring your own packed lunch, and any refreshments (e.g. flask of coffee, fruit juice, mineral water etc.).
- Wear strong footwear with good tread and ankle support, and warm waterproof clothing if weather is poor.
- Hard hat (we would be adjacent to cliff exposures for most of the trip) – if you do not possess one of these, let me know in advance and I will provide you with one.
You would be insured against accident whilst at the field locations to be visited during the day.
Dr. Nick Chidlaw is proposing to run the above, if there is sufficient interest and availability of people to make the course viable: contact by email.
The course has a fee of £25.00 per person.
The deadline for the minimum number (10) of enrolments is Saturday 21st April  (3 weeks before the course is due to run).