Leeds Geological Association

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FIELD VISITS 2019
 
A Report of LGA Field Events held during Summer 2019
 


FIELD PROGRAMME 2019 EXCURSION DETAILS PREVIOUS FIELD PROGRAMMES

Field Programme: 2019

DATE & TIME SUBJECT LEADER
11 May 2019
Saturday Daytime
Ilkley Moor - Geology & History Dr Gareth Martin
David Leather
LGA & WYGT
23 May 2019
Thursday Evening
Prince of Wales Park, Bingley Bill Fraser
LGA
4 June 2019
Tuesday Evening
St Chad's Church, Far Headingley Dr John Varker
LGA
22 June 2019
Saturday Daytime
The Flamborough Area Dr Rodger Connell
Hull University
14 July 2019
Sunday Daytime
Malham Cove & Gordale Scar Dr Doug Holliday
BGS (retired)
07 Sept 2019
Saturday Daytime
Roseberry Topping & Cliff Rigg Quarry Alan Simkins
Chris Hill
Tees Valley RIGS
04 - 06 Oct 2019
Friday - Sunday
Residential Weekend:
Abberley and Malvern Hills Geopark
 

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Excursion Details
Saturday 11th May 2019 — Ilkley Moor - Geology & History

This meeting was part of Yorkshire Geology Month and GeoWeek.

Leaders: Dr Gareth Martin and David Leather, LGA and West Yorkshire Geology Trust.

Purpose:

Ilkley Moor has a rich geological, natural and archaeological history which is easily accessible and is situated within a beautiful upland landscape. This walk has been organised as part of Yorkshire Geology Month and GeoWeek and aims to show the visitor some of the most interesting sites on the moor as part of a circular walk of ~5.5km. On your way you will see evidence of the huge rivers which covered Yorkshire over 310 million years ago as well as extremely rare rocks which show the tides which, at that time, rose and fell at the mouth of these rivers on a daily basis. You will also see how glaciers from the last Ice Age eroded the rocks on the moor and led to the formation of huge landslides. In addition to the rich natural history of the moor the walk will also highlight the human influence on the moor, from beautifully preserved and mysterious prehistoric cup and ring structures and enclosures and how humans utilised the geology of the moor as a natural resource, to how Charles Darwin enjoyed his trips to the spa town of Ilkley and what illness may have afflicted him!

Geology: Carboniferous, Quaternary.

Maps and references:

Aitkenhead, N. (2003). How did the Calf get there? Ilkley Moor and the Cow and Calf Rocks. Geology Today, Vol.19, No. 5, September-October, 2003.

BGS Bradford 1:50000, Sheet 69 geological map. Also, Waters, C.N. (2000). Geology of the Bradford District. Sheet Description of the British Geological Survey 1:50,000 Series Sheet 69 Bradford.

Leather, D. Ilkley Moor Geology Trail. Wharfedale Naturalists' Society.

Leather, D. (1996). The Walker's Guide to Mid Wharfedale & Washburn Valley.

Stephens, J.V., Mitchell, G.H. and Edwards, W. (1953). Geology of the Country between Bradford and Skipton. Geological Survey Memoir.


Thursday 23rd May 2019 — Prince of Wales Park, Bingley

This meeting was part of Yorkshire Geology Month.

Leader: Bill Fraser, LGA.

Purpose:

Prince of Wales Park was opened in 1865 in a disused quarry that had previously worked for local building purposes the Namurian, Rough Rock of the Rossendale Formation, the youngest unit of the Millstone Grit Group. Good sections of the Rough Rock, are exposed in old quarried faces and display many of the characteristic textures and sedimentary structures (both large and small scale) of the sandstone as well as a fault (which probably was the reason for the closure of the quarry). Lining the edges of many of the paths that criss-cross the Park are sandstone blocks full of fossil bark impressions and a quite impressive cast which will have probably come from the quarry when it was working.

Geology: Carboniferous.

Maps and references:

BGS map. 1: 50 000 Sheet 69 Bradford (Solid).

Tuesday 4th June 2019 — St Chad's Church, Far Headingley

Leader: Dr John Varker, LGA.

Purpose:

This excursion will begin inside the church where we will consider its construction, the materials used and its history in the context of the history of NW Leeds. Then we will follow a gentle, well-established geological route around the churchyard, examining the exterior of the church and numerous gravestones of very varied lithology and provenance.

Saturday 22nd June 2019   —   The Flamborough Area

"In the footsteps of Phillips, Lamplugh & Catt"

Leader: Dr Rodger Connell, Hull University.

Purpose:

To examine paleo-valley fill sediments of Flamborough Head (at Danes Dyke and South Landing) and their significance for dating advances of the last ice-sheet, together with an examination at Skipsea Withow Gap of deglaciation features after the ice retreated.

Geology: Cretaceous, Quaternary.

Maps and references:

Catt, J A 2007. The Pleistocene Glaciations..... A Review. PYGS. 56, pages 177 - 207.

Bateman et al, 2015. Last Glacial Dynamics.... PGA, 126, pages 712 - 730.


Sunday 14th July 2019 — Malham Cove & Gordale Scar

Leader: Dr Doug Holliday, BGS (retired).

Purpose:

This excursion will present an overview of the complex geology of this classic area of British geology, looking in particular at how the nature and location of the resultant varied rock types impacts on the current landscape. A dominating feature of the geology is the Middle Craven Fault with its long history of movement, in particular during Tournaisian and Visean deposition. To the north of the fault, on the Askrigg Block, the landscape is dominated by prominent pale grey limestone scars, commonly bare and sparsely vegetated, displaying limestone pavements, caves and dissolution karst features and spectacular gorges cut mainly by sub-glacial meltwater. To the south, in the Craven Basin, smoother, more rounded and greener landforms have formed on the Craven and Millstone Grit groups; locally projecting through this topography are rounded limestone 'reef knolls' and crags of turbiditic and fluvial grits.

Geology: Carboniferous, Quaternary.

Maps and references:

Waltham, Tony. 2007. The Yorkshire Dales: landscape and geology. The Crowood Press, Marlborough.

Waltham, Tony & Lowe, David. 2013. Caves and karst of the Yorkshire Dales. Volume 1. British Cave Association, Buxton.

[The above, beautifully illustrated books provide an excellent introduction to the geology and scenery of the Dales limestone country.]

Arthurton, R.S., Johnson, E.J. & Mundy, D.J.C. 1988. Geology of the country around Settle. Memoir of the British Geological Survey, Sheet 60 (England and Wales). [The most detailed account to date of the geology around Malham.]

Aitkenhead, N. et al. 2002. British Regional Geology: the Pennines and adjacent areas (Fourth Edition). British Geological Survey, Nottingham. [The Regional Guide provides an excellent account of the regional background.]

Ordnance Survey: 1:25 000 Outdoor Leisure Series 2 Yorkshire Dales - Southern & Western Area.

British Geological Survey: 1:50 000 Sheet 60 Settle. [The latter is published in two editions, Solid and Solid and Drift; both have advantages and disadvantages for the geologist visitor.]


Saturday 7th Sept 2019 — Roseberry Topping & Cliff Rigg Quarry

Leader: Alan Simkins and Chris Hill, Tees Valley RIGS.

Purpose:

Roseberry Topping is a distinctive, isolated hill that is an erosional outlier of the main escarpment of the Cleveland Hills. It is formed of Lower and Middle Jurassic sedimentary rocks. The succession of softer shales and harder sandstones has resulted in a stepped profile. We will examine this succession as well as the Tertiary Cleveland Dyke intrusion nearby and investigate how these rocks and the late Quaternary glaciation of the area controls the form of the landscape. We will also consider the palaeobotanical interest of Roseberry Topping (the reason for its SSSI status) in the wider context of the Yorkshire fossil flora and current research at nearby sites.

Geology: Jurassic, Quaternary.

Maps and references:

The Tholeite Dykes of the North of England - Holmes & Harwood 1929.

The Thinnfeldia Leaf-Bed of Roseberry Topping - Naturalist p.7-13 Thomas, H.H. 1915.

The Jurassic Flora of Yorkshire. (The Palaeontological Assoc. pp134) van Konijnenburh-van Cittert, J.H.A. & Morgans, H.S. 1999.

The Jurassic, Teriary and Quaternary around Great Ayton and Roseberry Topping, Cleveland Hills. In: Yorkshire Rocks and Landscape. Scrutton. C. (Ed) p110-118.

The Jurassic of the Cleveland Basin. Rawson & Wright. In: Taylor. P. (Ed) Field Geology of the British Jurassic. Geol. Soc. London p173-203.

Roseberry Topping Geotrail. Teesvalley RIGS Group, http://www.tvrigs.org.uk/

Cliff Rigg Geotrail. Teesvalley RIGS Group, http://www.tvrigs.org.uk/


4 - 6 Oct 2019     —     Residential Weekend: Malvern Hills

 




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Previous Field Programmes


Field Programme for 2002

Field Programme for 2003

Field Programme for 2004

Field Programme for 2005

Field Programme for 2006

Field Programme for 2007

Field Programme for 2008

Field Programme for 2009

Field Programme for 2010

Field Programme for 2011

Field Programme for 2012

Field Programme for 2013

Field Programme for 2014

Field Programme for 2015

Field Programme for 2016

Field Programme for 2017

Field Programme for 2018

Current Field Programme


 
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