A Registered Charity No. 220014 November 2013 / Circular ... Circulars/582.pdf · models, to...

A Registered Charity No. 220014 November 2013 / Circular 582

YORKSHIREGEOLOGICAL

SOCIETYPresident: Professor Patrick Boylan

CARBONATE ROCKS CURRENT RESEARCH

14.00 – 17.00 Saturday 9th November 2013Conference Auditorium, University of Leeds, Leeds, LS2 9JT

(PLEASE NOTE NEW VENUE FOR THIS MEETING)

Joint Meeting with Leeds Geological Association

www.yorksgeolsoc.org.uk NON MEMBERS WELCOME

2 www.yorksgeolsoc.org.uk YGS 2013

CARBONATE ROCKS - CURRENT RESEARCH

14.00 – 17.00 Saturday 9th November 2013

PROGRAMME

14.00 - 14.10 Society Business Patrick Boylan

14.10 - 14.40 Carbonate Concretions – How, Where and Why? Jim Marshall, University of Liverpool

14.40 - 15.10 Limestone – Orbital Forcing, Climate and Tectonic Controls on Deposition: Are Beds in Shelf Carbonates Millennial-Scale Climate Cycles? Maurice Tucker, University of Bristol

15.10 - 15.45 Refreshments plus sales of publications and 175th Anniversary souvenirs

15.45 -16.15 Thrombolite Process and Product from Mesocosm to Basin Scale; The Microbial Biofilm/Lime Mud connection Martyn Pedley, University of Hull

16.15 -16.45 Dolomite Evolution: New Approaches to An Old Puzzle Tatyana Gabellone, University of Bristol

16.45 - 17.00 Closing Remarks

CONTINUOUS PROFESSIONAL DEVELOPMENTThis meeting counts as 3 hours of continuous professional development under the Geology Society CPD scheme.

SPECIAL NOTE : The venue this time is the Conference Auditorium 2 (not the usual Rupert Beckett or School of Earth Sciences lecture rooms). For the Conference Auditorium use the Willow Terrace Road entrance on Calverley Street (just above the Leeds General Infirmary).

Please ensure all copy for circular number 583 is with the circular editor on or before the 10th November 2013. The AGM/Wakefield meeting is on the 7th December 2013. The circular needs to be with the YGS members two weeks prior to the AGM. The post can take a week; this leaves less than one week for putting the circular together and printing it. Therefore there is no time to wait for missing copy.

www.yorksgeolsoc.org.uk YGS 2013 3

CARBONATE CONCRETIONS - HOW, WHERE AND WHY?

Professor Jim Marshall, University of Liverpool

Carbonate concretions are common features of sedimentary rocks of all geological ages. They are most obvious in sandstones and mudstones as ovoid bodies of rock that protrude from natural outcrops: clearly harder or better-cemented than their host rocks. People are excited by finding fossils in the centre of mudstone-hosted concretions but spend little time wondering why the fossils are so well preserved. Concretionary horizons formed from merged concretions can also subdivide oil, gas and water reservoirs into separate compartments so they can be of economic importance.

The talk will include material from recent and unpublished studies. I will attempt to explain how and where concretions form: and discuss how evidence, ranging from outcrop data to sophisticated laboratory analyses, can be used to determine the origins of the cements.

Fig 1: Brown and white calcite cements fill large ‘septarian’ cracks in a large concretion from the Kimmeridge Clay at Ringstead Bay, Dorset.The origin of septarian cracks has been hotly debated for many decades. Vertical cut section (55cm field of view).© Jim Marshall.


CARBONATE CONCRETIONS - HOW, WHERE AND WHY?

Professor Jim Marshall, University of Liverpool

Fig 2: ‘Joined up’ concretions in the Bridport Sands at outcrop demonstrate how cementation can effectively compartmentalise one of the reservoir horizons in the UK’s largest onshore oil field.© Jim Marshall.

Limestones deposited on carbonate shelves in 5-30 metres water depth are widespread throughout the geological record and are well represented in the Carboniferous, Permian and Jurassic of Yorkshire. They commonly have a well-developed stratification, 10-100 cm thick, defined by shale partings, which is laterally extensive over l0s to 1000s of sq km. The duration of bed deposition is on the millennial scale.

There is an ever-growing literature on sub-Milankovitch, millennial-scale cyclicity recorded from Quaternary strata with mechanisms invoked including rapid warming/cooling for Dansgaard Oeschger (D-O) events and Bond cycles, ice-sheet dynamics for ice-rafted debris in Heinrich events, and changes in climate and/or solar irradiance for millennial-scale

LIMESTONES - ORBITAL FORCING, CLIMATE AND TECTONIC CONTROLS ON DEPOSITION: ARE BEDS IN SHELF CARBONATES MILLENNIAL - SCALE CLIMATE CYCLES?

Professor Maurice Tucker, University of Bristol


periodicities (~1500 yrs) in δ180 in Greenland ice cores. Ancient shelf and slope limestones can also be expected to have been affected by millennial-scale fluctuations in solar output/climate change and/or oceanic-atmospheric interaction, and these would have caused changes in depositional conditions, one way or another. However, there have been few descriptions of such high frequency cycles; or is it that we have simply overlooked them? Could it be that the beds, which are such a distinctive feature of shallow-marine limestones generally, are the product of high-frequency climate/environmental changes, driven by fluctuations in solar output or even volcanic activity?

The most likely explanation for limestone beds involves variations in the quantities of wind-blown dust or river-borne clay and subtle salinity changes, resulting from arid to humid climate changes: these would generate shale partings and affect carbonate productivity. Fluctuations in solar output may have been the climate driver. Millennial-scale climate rhythms will have operated throughout geological time. Their record in stratigraphy is there in the beds.

LIMESTONES - ORBITAL FORCING, CLIMATE AND TECTONIC CONTROLS ON DEPOSITION: ARE BEDS IN SHELF CARBONATES MILLENNIAL - SCALE CLIMATE CYCLES?

Professor Maurice Tucker, University of Bristol

Limestone beds in the Hambleton Oolite (Oxfordian) Spikers Hill, Yorkshire. Are the beds the result of millennial-scale changes in climate?© Maurice Tucker.

Bedded limestones, Carboniferous, Gordale, Yorkshire. Are these cycles?© Maurice Tucker.


THROMBOLITE PROCESS AND PRODUCT FROM MESOCOSM TO BASIN SCALE: THE MICROBIAL BIOFILM /LIME MUD CONNECTION

Dr Martyn Pedley, University of Hull

The persistent increase of lime muds throughout the late Proterozoic and into the Phanerozoic record has encouraged many theories as explanations. Popular explanations include the mechanical and biological disintegration of pre-existing carbonate grains, physico-chemically induced whitings and lately, microbial processes. Natural lime muds are generally composed of indeterminate spar crystal debris of varying size down to minimicrite grade muds. Today, these are produced both in freshwater and marine quiet water shelf and ramp settings in vast quantity; but what is their origin?

Long running (7 years) freshwater mesocosm experiments at Hull have been employed to examine microbial biofilm processes which lead to the precipitation of lime mud. Freshwater was chosen for the experimentation medium on account of its relatively simple ionic composition and the close comparability between marine and freshwater microbial biofilms. The two dominant microbial carbonate producers in the geological record are thrombolites and stromatolites. Both were grown in recycling flowing water (flow rates, temperature and sunlight hours were controlled and monitored 24/7).

Thrombolitic biofilm composed of microbes set in extracellular polymeric substance (green) and internal calcium carbonate precipitates (pale coloured patches densest towards the bottom right) This view is 12 millimetres wide.© Martyn Pedley.


A calcium reactor replaced calcium ions lost by CaCO3 precipitation and the experiments

were regularly sampled to examine biofilm development and nature of the carbonate product. Both laminites and particulate calcium carbonate were generated with particle sizes ranging from millimetre scale spar to nanometre-scale nanospheres. Stromatolite fabrics (multiple spar laminae with subordinate interlayered micrite) were generated under the fastest flowing situations, dominated by filamentous cyanobacteria. Precipitates typically developed external to the biofilm under high flow regimes and frequently entombed cyanobacterial trichomes. Intra-biofilm thrombolitic fabrics (typically open cancellate fabrics) were produced under slower flow conditions. Thrombolite precipitation was found to be well developed even within thin sub-millimetre thick biofilms.

Individual crystals commenced growth as amorphous calcium carbonate nanospheres. These ripened into microspar crystals at about 10 micrometres diameter. Precipitation was initiated in the basal layer of the biofilm after which further carbonate precipitates developed suspended within the cancellate Extracellular Polymeric Substance partitions. Over time, adjacent crystals aggregated into porous curtains linking successive basal layers. There was no apparent limit to the number of superimposed carbonate layers. Continued crystal growth was



Air dried microbial biofilm from the mesocosm containing coccoid chains (Nostoc), filamentous cyanobacteria and CaCO3 precipitates (tufa). The largest crystal (bottom right) is 20 µm long.© Martyn Pedley.


dependent on maintaining the EPS link between and within individual crystals and between layers. Biofilm damage (caused by increased turbulence, grazing and clast attrition) lead to disintegration of the EPS and yielded myriads of tiny carbonate particles which became available for transport elsewhere.

Shallow seismic, GPR and percussion core analysis of closely related lacustrine carbonates at Ruidera Natural Park Central Spain, provides a field-based facies scale analogue.

These show that the carbonate factory (marginal thrombolitic microherms) has generated >18m of lime muds during the Holocene. These have been redistributed by turbulence and associated gravity flows into gentle carbonate ramp slopes around the lake basin margins. A modest amount of physic-chemically precipitated lime mud has been added concurrently to these resediments by the pelagic microbial community. The Ruidera lakes provide a convincing field model which corroborates the laboratory findings and demonstrates the evolutionary importance of thrombolitic microbial biofilms in the production of fine carbonate sediments in the geological record.

Laguna Lengua, Central Spain during a dry summer. Note the marginal walls of biofilm precipitated thrombolitic calcite.© Martyn Pedley.




Dolomite is a metastable carbonate mineral that forms and occurs in many diverse sedimentary and diagenetic settings. Despite more than 200 years of study, the origin of dolomite still challenges our thinking, as chemical and hydrological conditions that lead to dolomite formation remain poorly understood. The crux of the “dolomite problem” is that stoichiometric dolomite has never been grown inorganically in a laboratory under typical near surface conditions. Another conundrum is the disparity between the minor amount of dolomite in Holocene sediments and their abundance in ancient platform carbonates.

Beyond the academic interest there is an industrial attention on dolomites, as some 20-25% of the World’s conventional oil and gas reserves are contained in dolomite reservoirs. These are among the most complex reservoirs in terms of complexity of petrophysical properties, and the characterization of their geometry and porosity-permeability patterns is key.

Fieldwork, petrography and geochemical methods are the classical tools to characterize dolomite bodies and interpret their origin, but new approaches continue to be developed to better finger-print dolomitizing fluids. Laboratory experiments can give insights into the dolomite kinetics and the role of the bacteria in mediating its formation. Reactive transport modeling (RTM) is a relatively new approach used to simulate dolomitization and associated diagenetic processes. RTM allows to simulate in space and time the evolution of mineralogy and porosity-permeability features. This approach enables us to evaluate proposed conceptual models, to develop viable and testable hypotheses and to identify and quantify the major controls on dolomitization in selected flow systems.

DOLOMITE EVOLUTION: NEW APPROACHES TO AN OLD PUZZLE

Dr Tatyana Gabellone, University of Bristol

Results of a RTM simulation of brine reflux dolomitization in a generic carbonate platform (modified after Al-Helal et al. 2012). Dolomite and anhydrite abundance (mineral %), and change from initial porosity (volume %) for reflux of 85 ppt brine after 1 My are shown.© Tatyana Gabellone


Our Annual General Meeting, Presidential Address and the Annual Reception and Buffet Dinner at Woolley Hall, Wakefield, on Saturday 7th December 2013 will be quickly followed by the start of our membership and subscription year on 1st January 2014, so this is going to be a very busy period for our Membership Secretary, Christine Jennings-Poole. This year we will also be implementing the small increase in each category of subscription agreed without dissent by the 2012 AGM in the light of the massive increase in postage charges since our last subscription increase nine years ago.

In the case of the almost two-thirds of members who pay their subscription through the bank-guaranteed Direct Debit system the change to your new subscription will be made centrally, so no action is needed on your part, but if you currently pay by Standing Order or cheque you will have to make this change yourself.

However, if you are at present outside the Direct Debit scheme but have a UK bank account can I suggest that this is a good time to change over to Direct Debit? This would certainly make things much easier for the Society, and most people these days also think it is simpler all round than the old Standing Order or cheque payment alternatives. We are therefore including in the Membership Information Update sheet being mailed out with this Circular a copy of the Society’s Direct Debit Form.

In the case of our overseas members without a UK bank account, and who currently often face very high international bank transfer charges, we are hoping to simplify subscription payments by using a specialist agency to accept credit and debit card payments securely on behalf of the Society: more information soon I hope.

The other important point I want to raise is the Government’s Gift Aid scheme for charities. Under this at no cost at all to themselves anyone paying UK Income Tax can register their subscriptions and other donations to the Society as Gift Aided, and we can then claim 25p Gift Aid for every £1 received. (In the case of Higher Rate taxpayers there can be tax benefit for the donor as well.) In August 2013 the Society received a refund of £1,889 from Her Majesty’s Revenue and Customs as Gift Aid on our subscriptions for the 2012-13 tax year – equivalent to an additional 63 full members at no cost at all to the Society.

I realise that some members will not be eligible for the Gift Aid scheme as their UK income may now be below the tax threshold after recent increases in the tax-free income tax allowances. But if you are a UK taxpayer but do not yet Gift Aid your annual subscription please consider doing so now. This takes only a moment or two: just let us have your home address (an HMRC requirement) in addition to your mailing list for publications and correspondence (if different) and sign the official Gift Aid declaration. We are therefore including a copy of this in the Membership Information Update enclosed with this Circular.

A WORD FROM THE PRESIDENT

Professor Patrick Boylan


The historic Rotunda Museum in Scarborough, opened in 1809 and now managed by the Scarborough Museums Trust, was designed under the guidance of William Smith to illustrate his recently-developed geological principles. The President of the Geological Society of London is a patron of the museum, and in recognition of this and of the Rotunda’s significance to the geological world the Society has agreed to institute a biennial public lecture in Scarborough entitled “The Geological Society President’s Lecture”. The first lecture will be on “Landslides and subsidence: engineering geology in an age of austerity”, given by the current President, David Shilston.

David is known to many YGS members as he was guest of honour at our 175th anniversary dinner at Wakefield last year. He is Technical Director – Engineering Geology, Atkins UK, and is the first engineering geologist to have been elected President of the Geological Society. He has some 35 years’ experience of civil engineering and geological projects in the UK and many countries overseas, and has specific expertise in the characterisation of ground conditions for engineering design and in the assessment and management of geohazards, including landslides, collapsing ground, seismic hazards and problems encountered during the construction and operation of projects. He has worked widely overseas in a variety of geological terrains and contexts, and is currently working on offshore wind farms in UK coastal waters, a cable routing project in southern England, oil and gas pipelines in the Caucasus, and a mud volcano in Java.

The lecture will take place at 6.30 p.m. on Thursday 5th December in the Public Library, Scarborough, and is open to everyone, free of charge. The library is only a few minutes’ walk from Scarborough station. We look forward to YGS members joining us on this very special occasion.

Pete RawsonChairman, Scarborough Museums Trust.

David Shilston President of the Geological Society

SCARBOROUGH MUSEUMS TRUST

The Geological Society President’s LectureScarborough, Thursday 5th December


The President’s Day Reception will be held at Woolley Hall following the AGM on 7th December 2013.

‘THE YORKSHIRE’ BUFFET MENU

Posh fish & chips in seaside cones

Mini Yorkshire puddings with roast beef and handmade Woolley red onion chutney

Handmade roasted red onion and Wensleydale quiche

Yorkshire ham and pickles platter

Yorkshire mini sausage with brown sauce

County herb salad

Greek salad

Rolls & Butter

Rhubarb crumble & tart

Yorkshire cheese selection

Despite a slight increase in price of the meal, the cost of tickets to members will remain at last year’s figure (£25.00 per person) and can be ordered from myself (contact details below) and will be issued as a personalised e-ticket on receipt of payment. Alternatively, tickets will be available at the Buxton (October 19th) and Leeds (November 9th) indoor meetings.

Paul Hildreth, General SecretaryKimberley, Bigby Road, Brigg, North Lincolnshire, DN20 8BU. Tel. 01652 655784

PRESIDENT’S DAY RECEPTION

Woolley Hall, 7th December 2013

NEW MEMBERS

RETIRED MEMBERSHIP Mr I A Thomas Derby


YorkshireRocks andLandscape: A Field Guide

Price £9.99 + £3.00 P&P. No postage and packaging if collected at thenext YGS indoor meeting.

POSTAL ORDER FORM

Please supply.......................copy(ies) of the YGS Field GuideYorkshire Rocks and Landscape

I enclose a cheque for £.......................inc P&P

Name: .....................................................................................................................

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Order forms and cheques to Dr J H Powell, BGS, Keyworth, Nottingham NG12 5GG. Please make cheques payable to Yorkshire Geological Society.

Yorks R&L order form:Layout 1 15/11/2011 10:25 Page 1BOOK ADVERTISEMENT

Order forms and cheques to Claire Foster, BGS, Keyworth, Nottingham NG12 5GG. Please make cheques payable to Yorkshire Geological Society.


CORRESPONDING SOCIETIES

Contact society representatives for the latest information

CRAVEN & PENDLE GEOLOGICAL SOCIETYContact: Paul Kabrna e-mail: [email protected] or http://www.cpgs.org.uk/ (usual meeting place for indoor lectures: The Rainhall Centre, Barnoldswick)

Friday15th NovemberGeology of the Cotswold Water Park with added Mammoths!Speaker: Neville Hollingworth Ph.D., University of Birmingham. 7.30pm

Friday 13th DecemberUnder the skin of the Lizard – A Geological Walk Around the Lizard Peninsula of CornwallSpeaker: Lesley Collins, CPGS

CUMBERLAND GEOLOGICAL SOCIETYSecretary: Rosemary Vidler, 11 Blencathra View, Threlkeld, Cumbria, phone no 017687 79326, e-mail: [email protected]; http://www.cumberland-geol-soc.org.uk/

Wednesday 13th NovemberAn Assessment of the Processes of Hydraulic Fracturing or “Fracking” Speaker: Prof. Peter Styles. Venue: Friends Meeting House, Kirkgate, Cockermouth, CA13 9PH

EAST MIDLANDS GEOLOGICAL SOCIETYJanet Slater, tel. 01509-843.297; e-mail: [email protected] or http://www.emgs.org.uk (usual meeting place for indoor lectures: Lecture Theatre B3, Biological Sciences Building, University of Nottingham)

Saturday 7th December LandslidesSpeakers: Helen Reeves & Claire Dashwood

Saturday18th JanuaryShale GasSpeaker: Nick Riley

EAST MIDLANDS REGIONAL GROUP OF THE GEOLOGICAL SOCIETYSecretary: David Boon, British Geological Survey, Keyworth, Nottingham, [email protected]




EDINBURGH GEOLOGICAL SOCIETYe-mail: [email protected]; http://edinburghgeolsoc.org/; Lectures Secretary: Kathryn Goodenough, British Geological Survey, West Mains Road, Edinburgh EH9 0ET, tel. 0131 650 0272, e-mail: [email protected]. Lectures are held in the Grant Institute of the University of Edinburgh, West Mains Road, Edinburgh, at 7:30pm, except where stated otherwise.These meetings are open to the public, there is no charge, and visitors are welcome. Tea and biscuits are served after the lectures, upstairs in the Cockburn Museum of the Grant Institute. (See http://www.ed.ac.uk/maps for location.)

Wednesday 13th November The Antarctic Ice Sheet and Climate ChangeSpeaker: Mike Bentley

Wednesday 27th November Terrane Analysis South of the Lapetus Suture Speaker: Dave Schofield

THE GEOLOGISTS’ ASSOCIATIONhttp://www.geologistsassociation.org.uk/: The schedule of field meetings for 2012 includes the following in the wider YGS region: (For further details and to book places please e-mail or telephone Sarah Stafford at the GA Office: [email protected], tel. 020 7434 9298)

HUDDERSFIELD GEOLOGY GROUPContact: Phil Robinson, 01484-715.298. http://www.huddersfieldgeology.org.uk/ Meetings at Greenhead College, Huddersfield, on Monday evenings at 7pm unless otherwise stated.

Monday 11th NovemberA Geological Perspective on the History and Culture of YorkshireSpeaker: John Varker

HULL GEOLOGICAL SOCIETYMike Horne. Tel: 01482 346 784 or e-mail: [email protected] web: http://www.hullgeolsoc.org.uk (Usual meeting place for indoor lectures: Department of Geography, University of Hull, at 7.30 pm.

Tuesday 19th NovemberClub Night

Thursday 21st NovemberThe Significance of Charles Darwin’s Month in the Andes, March to April 1835Speaker: Patrick Boylan

LANCASHIRE GROUP OF THE GEOLOGISTS’ ASSOCIATIONSecretary: Jennifer Rhodes, e-mail: [email protected]




LEEDS GEOLOGICAL ASSOCIATIONAnthea Brigstocke (General Secretary). Tel: 01904 626 013: E-mail: [email protected] Field Meetings: Judith Dawson Tel. 0113 270 1069 e-mail: [email protected] or http://www.leedsgeolassoc.freeserve.co.uk (usual meeting place for indoor lectures: Conference Auditorium 2, Leeds University at 7pm.

Thursday 7th NovemberGeological Characterisation of Groundwater Aquifers for Resource ProtectionSpeaker; Dr Jared West, Earth & Environment, University of Leeds

Thursday 5th DecemberAGM and Conversazione – Short Talks and Displays by Members

LEICESTER LITERARY & PHILOSOPHICAL SOCIETY - SECTION C GEOLOGYChairman and contact: Dr. Joanne E. Norris, 0116 283 3127, j.e.norris @ ntlworld.com; Website: http://www.charnia.org.uk/ Usual meeting place for indoor lectures (unless otherwise stated): Lecture Theatre 3, Ken Edwards Building, University of Leicester at 7.30pm, refreshments from 7.00pm.

Wednesday 13th November Laser scanning & 3D Printing 563 Million Years of Evolution: the JISC GB/3D Type Fossils Online ProjectSpeaker: Dr Mike P. A. Howe

Wednesday 27th November The Mapping and Understanding of Landscapes, Geology and Soils of Bedfordshire & CambridgeshireSpeaker: Dr Timothy Farewell and Dr Martin Whiteley

MANCHESTER GEOLOGICAL ASSOCIATIONhttp://www.mangeolassoc.org.uk Sue Plumb, Hon. General Secretary: e-mail: [email protected]; programme enquiries: [email protected]. (Usual meeting place for indoor lectures: Williamson Building, Department of Geology, University of Manchester )

Wednesday 11th DecemberMining the Yard Seam in New Mills in the 18th and 19th CenturiesSpeaker: Dr Derek Brumhead

Saturday 25th January The Broadhurst Lectures: The ‘Avian Dinosaurs’: Latest Research on Some Early Fossil BirdsThe Gliding Flight of Feathered Dinosaurs and the Evolution of Bird FlappingSpeaker: Dr Gareth Dyke




NORTH EASTERN GEOLOGICAL SOCIETYProf. Gillian FG Foulger, University of Durham, tel. 0191-334.2314, e-mail: [email protected]. Lectures are at 7.30pm in the Arthur Holmes Lecture Room, Science Laboratories Site, University of Durham. See website for more details: http://www.northeast-geolsoc.50megs.com

Friday15th NovemberShale Gas: Geology MattersSpeaker: Prof. Andrew Aplin

NORTH EAST YORKSHIRE GEOLOGY [email protected]; website: http://www.neyorksgeologytrust.com/: Kathryn Brown,North East Yorkshire Geology Trust, 5 Station Workshops, Robin Hoods Bay, Whitby, N. Yorks, YO22 4TG Tel. 01947 881000

NORTHERN REGIONAL GROUP OF THE GEOLOGICAL SOCIETY OF LONDONSecretary: Dr Mark Allen, Department of Earth Sciences, University of Durham, e-mail: [email protected]

NORTH STAFFORDSHIRE GROUP OF THE GEOLOGISTS ASSOCATIONEileen Fraser Tel: 01260 271505 email: [email protected] http://www.esci.keele.ac.uk/nsgga/(usual meeting place for indoor meetings: William Smith Building, University of Keele at 7.30pm

Thursday 14th NovemberThe Thirteenth Wolverson Cope LectureWhere the Woolly Rhinos Roam: Vertebrate Faunal and Environmental Change During the Last Ice AgeSpeaker: Prof. Danielle Schreve

Thursday 12th December The Christmas Social at the Keele Sustainability HubA Short Talk on John MIlne (1850-1913), Father of Modern SeismologySpeaker: Dr Ian Stimpson

ROTUNDA GEOLOGY GROUP (SCARBOROUGH)contact Sue Rawson, tel. 01723-506.502, email: [email protected] (usual meeting place Room CG7, Scarborough Campus of the University of Hull, Filey Road, Scarborough):

SORBY NATURAL HISTORY SOCIETYKen J Dorning, Geologists Group Secretary, e-mail: [email protected]; website: http://www.sorby.org.uk/


WESTMORLAND GEOLOGICAL SOCIETYcontact: E-mail: [email protected] http://westmorlandgeolsoc.org.uk/ Meetings are on Wednesdays and start at 8 pm (unless otherwise stated) and are held in the Abbot Hall Social Centre, Kendal.

Wednesday 20th NovemberThe Middle Jurassic of Ketton, RutlandSpeaker: Peter del Strother

Wednesday 18th DecemberJacob’s Join and Members’ Night

YORKSHIRE MID-WEEK GEOLOGY GROUPWest Yorkshire based informal mainly amateur and retired group that organises monthly field meetings or museum visits on Tuesdays, Wednesdays or Thursdays. Details in regular Newsletters and on the Group’s website: http://mwggyorkshire.webspace.virginmedia.com/. Contact: [email protected]

Wednesday 4th DecemberAGM at the Bridge Inn, Walshford, North of Wetherby

Monday 20th January 2014 Another Members Day at Deepdale, Boston Spa

YORKSHIRE REGIONAL GROUP OF THE GEOLOGICAL SOCIETYContact: Marina Kirkpatrick <[email protected]>



GENERAL INFORMATION


SUBMISSION OF PAPERS

Manuscripts for publication in the Proceedings should be submitted to ‘The Editors, Proceedings of the Yorkshire Geological Society, Geological Society Publishing House, Unit 7, Brassmill Lane Enterprise Centre, Brassmill Lane, BATH, BA1 3JN’. Typescripts should be prepared using the updated instructions for authors given on the inside back cover of the latest issue (Volume 59 Part 3, May 2013).

Publication of manuscripts may be expected in the next, or next but one part, following acceptance. The Proceedings will be abstracted and/or indexed in, GeoArchive, GeoRef, Geobase, Geological Abstracts and Mineralogical Abstracts, Research Alert and Science Citation Index Expanded (SCIE).

COPY FOR CIRCULAR Copy deadline for Circular 583 10th November 2013

NEXT INDOOR MEETING 7th December 2013 - President’s Day - and AGM, Woolley Hall, Wakefield

CONTACTSGENERAL SECRETARYPaul Hildreth BSc, ‘Kimberley’ Bigby Road, Brigg, North Lincolnshire DN20 8BUTelephone: 01652 655784 e-mail: [email protected]

MEMBERSHIP SECRETARYMs Chris Jennings-Poole BSc., 6 Wolsey Drive, Norton, Stockton on Tees, TS20 1SYe-mail: [email protected]

CIRCULAR EDITORKeith Park, BSc. (Hons), 24 Ings Lane, Guiseley, West Yorkshire LS20 8DATelephone: (Work) 0113 278 4286 (Home) 01943 878787e-mail: [email protected]

Edward Boyle Library – 83Marjorie & Arnold Ziff Building –77

Maurice Keyworth Building – 19

Roger Stevens Building – 89

Parkinson Building – 60

The Edge – 101

Leeds University Union – 32

Music & Clothworkers’ Centenary Concert Hall – 75

Engineering Building – 48

Michael Sadler Building – 78 Worsley Building – 95

Great Hall – 57 E C Stoner Building – 73Fairbairn House – 6

CARBONATE ROCKS CURRENT RESEARCH14.00 – 17.00 Saturday 9th November 2013Conference Auditorium, University of Leeds, Leeds, LS2 9JT(PLEASE NOTE NEW VENUE FOR THIS MEETING)

Joint Meeting with Leeds Geological Association

Please Note: Articles and opinions published in the YGS Circular reflect the view of the individuals writing those parts of the Circular and in no way necessarily reflect the view of Council or of the Society as a whole.

Cover page. ‘Joined up’ concretions in the Bridport Sands at outcrop demonstrate how cementation can effectively compartmentalises one of the reservoir horizons in the UK’s largest onshore oil field. © Jim Marshall.

GENERAL MEETING (COUNCIL MEETING No. 84)

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