Branch Organiser's Words Events Diary
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Soft Rock Soft Rock South East Branch Newsletter The Open University Geological Society BranchBranchMicrosoft Website: Web Site: http:// www.members.aol.com/ougsebougs.org/southeast July 2011 Branch Organiser's Words Issue 3/11 irst a welcome to two new residential event for the whole society, Inside this issue: F members, Claire Oakley of Becken- the “Winter Weekend” to be held at ham and Glen Beale of Hove. Also a Hothfield near Ashford in November. welcome to the South-East branch for The various members of the South-East Branch Organiser’s Helen Doyle who has transferred from branch committee are working hard and Words 1 London branch following her move to enthusiastically on the preparations, Robertsbridge. leaving me now mainly to co-ordinate Notices 2 and to act as liaison with the society as a whole. Please see the advertisement on There have been a number of changes page 2, which gives the provisional Brightling Mine 1 3 recently in the central management of programme of activities. Prior booking OUGS. At the AGM in April a new is required, using the form to be found Brightling Mine 2 6 Treasurer was elected: John Gooch, in the OUGS newsletter and on the previously Treasurer of North-West website. Branch fieldtrip to branch. At that time there were still no Turkey 2012 candidates for the vacant post of 10 Information Officer, but I understand The day visitor fee of £20 includes the that Taryn Clements from South-West cost of a field trip in the morning and a Branch Committee 12 branch has recently been appointed. programme of talks in the afternoon, Another recent change is that Stuart together with a buffet lunch and mid- Swales, East of Scotland Branch afternoon refreshments. Everyone is Organiser, is now Webmaster, in welcome to the special private buffet succession to Gavin Mair who resigned dinner on the Saturday evening (£25), earlier in the year. followed by a quiz. As well as the field trips and talks, there will be plenty of time for meeting old friends and making As I mentioned in the April newsletter, new ones, and there is no compulsion to this year I am going through a new experience for me, organising a (Continued on page 12) See page 2 for OUGS Insurance Statement. Events Diary Note: a small charge (usually £2 per 19th August—21st August person) is made for all 2011 Symposium at Stirling: North of the Suture. fieldtrips unless other- wise stated. Saturday 10th September - with David Bowler Dryhill, Sevenoaks and Westerham (See page 8) Please provide a mobile phone number Friday 18th—Sunday 20th November Winter Weekend at Hothfield, Ashford, Kent (See page 2) at the time of booking a fieldtrip. This will April 21st to 28th 2012 ensure you are kept Archaeological and Geological trip to the Ancient Lycian region in the Teke Peninsula updated with any late of southern Turkey. (See page 10) changes Please contact Alison for all the above on [email protected] See also page 12. for reasons of space. Any lengthy or detailed changes I will Notices endeavour to check with the author first. Future Newsletter Dates While the timetable will be slightly flexible I will aim to publish OUGS Insurance Statement as follows: Each person attending field meetings does so on the under- Issue 4-11 September standing that they attend at their own risk. The OUGS has Public Liability insurance cover for field and indoor meetings, Issue 5-11 December but Personal Accident cover and Personal Liability cover I would appreciate copy by the 20th of the previous month at remain the responsibility of participants. Members with house the latest. The earlier I receive contributions the greater the insurance will probably find this included. Members should chance of entry into the next Newsletter. also note that they will be required to take out appropriate travel insurance for any overseas events; an annual travel insurance may be the best form of cover for any member who Contributions Welcome regularly attends field events. This is your Newsletter. Articles, notices, fieldtrip write-ups, holiday snaps (preferably with some geology in) are all e -copies welcome. email contributions to me with photos. I can open most formats. If you are not yet electronic put your article and Electronic copies of Soft Rock can be obtained through the photographs in the post. I may need to make minor changes Branch Organiser. Winter Weekend Friday 18th to Sunday 20th November 2011 Based at the Holiday Inn, Hothfield, Nr Ashford Provisional Programme of Events A weekend of Kentish geology, including chalk cliffs, fossils, coastal change, landslips, erosion, sea defences, including special buffet dinner on Saturday evening followed by a quiz. Fieldtrips Lectures The hotel is situated on the Lympne and introduction to Sandstones of the Weald Romney Marsh A20, only 4 miles from Ashford Ragstone Quarrying Cliff End International Station, served by Eurostar trains from London Geology and Flora of Kent Folkestone Warren and the Continent. Possible English Heritage Ragstone Survey Hermitage Quarry pick-up service by local Fossils of the North Kent Coast Folkestone Leas members from the station. Hothfield Common Activities and Displays St Margaret’s Bay See the National Newsletter or Microfossil workshop the OUGS website under Building Stones of Canterbury GeoConservation Kent “Society Events” for the Loose Valley / Quarry booking form. Medway Fossil and Mineral Society Canterbury Building Stones Day Visitors Welcome Kent Geological Book Sales All this and plenty of time to relax with your friends in a comfortable hotel or in the separate on-site pub. Page 2 Soft Rock chemical processes mostly the desulphurisation of flue Travel 250 Metres down gases but gypsum and anhydrite continue to be mined at Brightling, although output has fallen over the years from the Brightling Graphic Log 1 million tonnes to 150,000 tonnes pa, it still supplies the cement manufacturing industry and small quantities go to Visit: 24th March 2011 the plasterboard factory The mine has been in continuous operation since 1963. The discovery of 4 seams of gypsum (See Litho- By Marilyn Besford stratigraphic diagram below) in the Upper Jurassic Purbeck from a deep borehole carried out in 1876 south west of Mountfield led to the set up of the Sub-Wealden fantastic field trip, this was one not to be missed, Gypsum Company and eventually this company became A whether you were an amateur or professional part of British Gypsum owned by Saint Gobain S.A. The participant. The OUGS visit to Brightling mine on the original Mountfield mine has since closed after its stocks th 24 March 2011 was expertly led by British Gypsum‟s of gypsum were depleted. chief geologist, Noel Worley, and mining engineer and manager David Partridge. Nine members of OUGS were After the presentation we were briefed on the use of the treated to an informative and extremely interesting visit self-rescuer: a small vital device essential while under- both above the mine and 250 metres below the beautiful ground providing a life saving breathing apparatus used east Sussex countryside. A resounding success, it proved in emergency if oxygen levels fall or air is contaminated to be an exhilarating and unforgettable experience. with, for example, carbon monoxide. The self-rescuer can provide oxygen for 90 minutes allowing miners to reach a Travelling to the mine in the glorious spring sunshine „safe point‟. These are survival areas where miners muster highlighted the area‟s outstanding natural beauty. The in emergencies with food, water and shelter. There they mine, its site office and working buildings are cleverly can remain for 24 hours or longer, depending on the concealed within the forests and the surrounding natural numbers involved, until the crisis has past or indeed a undulating hills causing relatively little visual impact on the environment. All materials mined are transported by the carefully hidden conveyer (the longest in the UK, installed in 1986), which winds its way like a giant millipede to the plaster plant at Robertsbridge (Figure1). We arrived around 8.45am and were greeted by trip organiser, Alison Ure and manager David Partridge. A very lively, excited and slightly apprehensive group (affectionately dubbed the „A‟ team — Figure 7) met one another and broke the ice by discussing the various exhibits on display in the site office, which consisted of gypsum, anhydrite, Portland Sandstone, underground plans of the mine workings and rules and regulations concerning safety when in the mine. One rule stood out: don‟t get lost! Cue nervous chuckling from the group. The introductory presentation by David Partridge high- lighted the history, production and the excellent safety record and standards adopted at the mine. After answering many questions posed by the group, he handed over to Noel for a detailed presentation involving the history of the mine, analysis of gypsum, production methods, its uses, stratification, structure, and its deposition and formation in the surrounding area of the Mountfield and Brightling anticline. (Figure 2: awaiting the briefing) What surprised many were the numerous uses of gypsum, including less well known sectors such as agricultural, automotive and aviation. The fact too, that it is utilised in the food, brewing, pharmaceutical and medical industries served to further underline the human value of gypsum. Calcium sulphate can be manufactured today by many Above diagram courtesy of Noel Worley & British Gypsum Issue 3/11 Page 3 rescue has been executed. overtime! This underground monster was quite imaginable as it was audible, not visible. Kitted out in our „high-vis‟ jackets, miner‟s helmet complete with miner‟s lamp, belt carrying our battery Joining the other group with David Partridge, Noel packs and self rescuers we were eager and ready to guided us through the cavernous rooms and pointed out depart for the mine.