September 2017
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Mercia Rocks OUGS West Midlands Branch Newsletter Issue No 3 (2017) September 2017 Limestone slopes of the Eglwyseg Escarpment and Offa’s Dyke Sandra Morgan (Moyra Eldridge Competition—Highly Commended) Branch Officers Contents Branch Organiser – Sandra Morgan Branch Organiser’s report p 2 Branch Treasurer - Susan Jackson Field Trip programme p 3 Newsletter Editor – Mike Hermolle Geo-etymology p 6 Field trip reports P 7 Branch Committee Other Societies p 21 David Green, Alan Richardson If you would like to join the committee please do get in touch [email protected] 1 [email protected] BO Report September 2017 Dear all, I hope you had a great summer! Since the last newsletter, our branch programme has continued with a field trip on 2 July to the Lickey Hills, led by Julie Schroder with contributions from Alan Richardson. Here we examined different outcrops of the Ordovician Lickey Quartzite and various younger rock formations in the context of the wider landscape, and we learned about the geo conservation work of the Lickey Geo-Champions. See the trip report in this newsletter. There will be three more branch events this year. On Sunday 1 October we have a field trip to South Malverns, led by John Payne. This trip, organised by OUGS West Midlands, is a shared trip with the Black Country Geological Society. After this we can look forward to two more of Alan Richardson's popular labs: a Mineralogy Laboratory Workshop on 7 October and a Sedimentary Laboratory Workshop on 9 December. There are further details about all 3 events in this newsletter. The 2018 programme will start with our branch AGM on Saturday 20 January 2018. This will be held in the Lapworth Museum Education Room. Further information about the AGM will follow nearer the time, and for information about the Lapworth Museum, see the Museum website at http://www.birmingham.ac.uk/facilities/lapworth- museum/index.aspx. The branch AGM is your opportunity to elect your branch committee members for the coming year, and to give your feedback/suggestions. We would welcome new committee members. Do get in touch with me if you would like to discuss what this might entail. This year the OUGS Symposium, entitled A Festival of Geodiversity, took place in August at Queen Margaret University, Edinburgh. With good weather, interesting speakers and excellent field trips, the participants enjoyed a great weekend of geology. Next year's Symposium will be held at Worcester University – a great opportunity for West Midlands members! The organising committee (from the East Midlands, West Midlands and Severnside branches) are currently putting together the programme of events and other arrangements – look out for more information soon! Best wishes, Sandra 2 [email protected] Forthcoming Field Trips and Events Each person attending a field meeting does so on the understanding that he/she attends at his/her own risk. The OUGS 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 OUGS 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 personal choice. Programme 2017/18 Sun 1 October South Malverns. Leader John Payne. Contact David Green [email protected] Sat 7 October Alan Richardson’s Mineralogy Lab Workshops—Lickey Hills Visitor Centre Sat 9 December Alan Richardson’s Sedimentary Petrology Lab Workshop—Lickey Hills Visitor Centre contact Alan Richardson [email protected] " Please note Alan's change of email address Sat 20 January 2018 WMi Branch AGM—Lapworth Museum Education Room 20-22 April 2018 OUGS AGM and Social Weekend—Shap Wells Hotel 10-12 August 2018 OUGS Symposium “Music of the Earth” at Worcester Poster on last page Contributions to the Newsletter are always welcome. The subject matter can be anything geological that you think other members would like to read. Duplication of field trip reports does not matter as you will see from this issue. Items for inclusion in the next Newsletter, by email to: [email protected] by 30 November 2017 We particularly need trip reports, photographs for the header on Page 1 and you’ve seen my “Rocks Thru the Windscreen” —why not submit one for a regular journey you do. Mike Hermolle 3 [email protected] Sun 1 October South Malverns Leader John Payne. Contact David Green [email protected] A shared trip with the Black Country Geological society Time and Location Start 10.00. Meet Hollybush car park (free) on north side of the Tewkesbury to Ledbury road at the crest of the Hollybush Pass over the Malvern Hills. Grid Reference SO 759 369. Overview and Geological Interest On this walk we will see the rocks of the south Malvern Hills and their immediate surroundings and discuss the geological aspects of the view from the hill top. The walk starts with a steep 100 metre climb but this is taken slowly and in stages. We visit first the site of a recently constructed earth house to see a thrust fault (an element of the East Malvern fault system). At the top of Raggedstone Hill the scenery, structure and geology of the hill and its surroundings will be described, followed by an early lunch. The first of several volcanic dykes which we shall see on the walk outcrops here. On the south ridge of the hill is an exposure of the Cambrian/Precambrian unconformity which here forms the western boundary of the igneous and metamorphic rocks of the Malvern ridge. Lower on the hill is a quarry showing some of the variety of Malvern’s metamorphic rocks, particularly a phyllonite. We will visit a small waterfall on a Triassic conglomerate of local rocks. A small quarry at Coal Hill shows interleaved Ordovician lava and Ordovician shales. On Chase End Hill, the most southerly of the Malverns, is an exposure of Malvern gneiss. The return to the cars passes an exposure of baked Cambrian shale and a quarry in andesitic lava with a nearby much decorated ancient oak. The final stop will be at the recently cleared roadside exposure at Hollybush, showing two distinct intrusions into the Cambrian Hollybush Sandstone. Practicalities The tour is scheduled to take 6.5 hours. Estimated finish: 4:30pm The length of the walk is about 7km and there are some hilly bits. There is one short but steep descent on rather mobile gravel (but on a well-used path) and another on grass. There are no facilities of any sort on the route of this walk. Bring a packed lunch. Wear walking boots and clothing appropriate to the weather. 4 [email protected] 7 October 2017: Mineralogy Laboratory Workshop 1030 – 1530 Lickey Hills Visitor Centre, Warren Lane, Lickey, Birmingham B45 8ER The venue is signposted from the roundabout at Junction 4 (Lydiate Ash) of the M5. Last year saw the addition of a one-day mineralogy course to our annual programme of practical courses. While the structure remains the same, this year’s event benefits from a better range of specimens, a new laboratory guide, and access to two binocular microscopes. The course covers the essential elements of describing and identifying minerals. A range of rock- forming and ore mineral specimens will be provided, along with support materials which will allow individuals to work at their own pace, with the support of the tutor. All students will be e-mailed a pdf copy of the laboratory guide in advance: this booklet gives instructions for the systematic identification ofmineral properties. At the workshop you will be given a printed copy of the guide as well as an A3 sheet which records some of the properties of twenty four specimens: the object of the day’s work will be to complete the missing entries and identify the minerals. The price of this day school is £2.00. 9 December 2017: Sedimentary Petrology Laboratory Workshop 1030 – 1545 Lickey Hills Visitor Centre, Warren Lane, Lickey, Birmingham B45 8ER The venue is signposted from the roundabout at Junction 4 (Lydiate Ash) of the M5. This one-day lab-based course will cover the essential elements of describing, identifying and interpreting sedimentary rocks. A range of clastic and carbonate specimens will be provided, along with support materials which will allow individuals to work at their own pace, with the support of the tutor. The laboratory booklet gives instructions for the systematic identification of the rocks and pro- forma sheets for each specimen. All students will be e-mailed a pdf copy of the booklet in advance. The price of this day school is £2.00. If the weather is good, you may wish to make an independent visit to the Barnt Green Road Quarry, to see a recumbent fold in Ordovician quartzites (http://ehtchampions.org.uk/ch/?page_id=76), however, this is not part of the day course. The ground is rough and muddy so please wear appropriate footwear. Both of these day schools are tutored by Alan Richardson, a lecturer with 38 years’ experience of teaching geology. They are the first two of the annual series of five workshops, which progresses through igneous and metamorphic petrology, and concludes with a field skills training day in late spring. These events are especially suitable for those new to the study of geology, but are open to all.