Cymdeithas Daeareg Gogledd Cymru
North Wales Geology Association
Programme :
2020-21
at a
Glance

Postponed Indefinitely
Underground exploration, Corris slate quarries

Wednesday 7th April 2021
Online Presentation: A History of Quicklime and Cement

Wednesday 4th August 2021
Online Presentation: Battery minerals and the Circular Economy

Saturday 9th April 2022
Field Meeting: Coed Maesnewyddion

Sunday 22nd May 2022
Field Meeting: Maeshafn Mining District


Postponed
Indefinitely
Field Meeting:
Corris Slate Quarries underground exploration
Leader: Mark Waite, Corris Mine Explorers
Braich Goch Mine, Corris, by Machynlleth

This meeting is a follow-on from the very successful and popular meeting held at Cwmorthin in recent years. Whilst there are adrenaline-fuelled adventures for thrill-seekers, this is intended to explore the underground legacy and the geological background to the Welsh slate industry. The underground itinerary is designed specifically for our requirements by Mark and the team at Corris, and intended to last for around 3 hours. Holding an outdoor meeting in March is unusual, but the weather is unlikely to pose risk to this expedition. There will be a charge for this guided trip, though the Association will be off-setting part of the actual cost for members. Safety gear is provided, and wellies if necessary, but overalls and waterproofs are your responsibility. You will be required to understand and sign a declaration of terms and conditions and fitness for the expedition - a copy can be provided in DOCX format prior to the day.

Please contact Jonathan Wilkins by email or telephone to register your interest.
Image courtesy of corrisminexplorers.co.uk.

Wednesday
7th April 2021
A History of Quicklime and Cement
Speaker: Dr Peter del Strother
Location: Online presentation via ZOOM.
To commence at 19:00h, joining from 18:45h

The global cement market is worth around 350 billion USD and is one of the the principal indices of economic activity, being one of the key consumable components of construction in its broadest sense. The material that we take for granted was developed in the 19th century by an englishman trying to improve the performance of hydraulic limes, based upon technology well known in Roman times. Versatile concrete could be cast in moulds as a synthetic stone, and the technique was taken up by an early-adopter to make the famous, life-sized dinosaur models in Crystal Place.

Peter will describe the principles of manufacture of limes and cement and their development and uses since Roman times, including some historic photographs and several short 1930s films including stone-breaking by hand at a quarry face and operation of a lime kiln. I am sure that many of you will be familiar with some of the buildings he will use for illustration. He has set a puzzle in the image here. Where is it (clue, not far from the Offa's Dyke path) ?

The Association's fifth online presentation, is presented by Dr Peter del Strother, from the University of Manchester's School of Earth, Atmosphere and Environment. Peter is an author with a particular interest in the Ribblesdale area of Lancashire and its cement works, and geo-conservation.

If you are a ZOOM user, please email Cathy O'Brien (email address is on the contacts page - please note that you MUST remove blank spaces from the email addresses if you copy-and-paste them) so that she can issue an invitation to this private conference.

Contact details are here
Gary or Cathy are also able to assist with any advance preparation.

Wednesday
4th August 2021
Battery minerals and the Circular Economy
Speaker: Professor Alan Butcher
Location: Online presentation via ZOOM.
To commence at 19:00h, joining from 18:45h

This talk is designed for those who want to learn more about how minerals will drive the green energy economy of the future. Without minerals we would have no batteries, wind turbines, solar panels, or any kind of high-tech commodities.

But how minerals occur in nature, how their physical and chemical properties are valued commercially, and even how we can efficiently extract them, is information not readily available in one place. This presentation combines the geology, mineralogy, mineral processing and geometallurgy of minerals required specifically for batteries.

Recycling of batteries will also discussed and the how the Circular Economy is supposed to work, but in reality is actually not that circular, nor an economy, but future solutions will be introduced.

Our sixth online presentation is given by Alan Butcher, Research Professor in Geomaterials & Applied Mineralogy at the Geological Survey of Finland. Alan has long held an active interest in economic geology and the petrology of ores and mineral deposits, after discovering Platinum group elements in the layered gabbros of Rum in the Hebrides. He has held teaching positions at the Camborne School of Mines and Exeter University and was Chief Scientist at Intellection Pty in Australia with special interest in development and application of automated petrography by the QEMSCAN instrument.

If you are a ZOOM user, please email Cathy O'Brien (email address is on the contacts page - please note that you MUST remove blank spaces from the email addresses if you copy-and-paste them) so that she can issue an invitation to this private conference.

Contact details are here
Gary or Cathy are also able to assist with any advance preparation.

Saturday
9th April 2022
Field Meeting:
Coed Maesnewyddion Quarry
Leader: Richard Birch
Caen-y-Coed forestry walk, Nr. Betws-y-Coed

A ramble through mature forest of Douglas Fir with some geological exposures of interest.

The route commences in the car park at Caen-y-Coed, on the A5 between Capel Curig & the Swallow Falls hotel, SH 7621 5761 at 08:30h. There are no toilets or facilities, and the track climbs steeply for the first 1½ km. Expected finish 13:00h.

There is a circular walk of 5 km, but the option to return via the same route is the default for this excursion. Wear stout walking shoes or boots. Bring food and drink, as the climb is thirsty work.

If you wish to collect specimens from the quarry at the end of the route, then a solid hammer is useful, as the rock samples are best broken across cleavage. If you are intending to do this, gloves and protective eye wear is essential! Details of the geology are deliberately withheld as there is a prepared crib sheet enabling participants to work out the age themselves.

Please contact Gary Eisenhauer to register your interest.

Sunday
22nd May 2022
Field Meeting:
Maeshafn Pb/Zn Mining Legacy
Leader: Keith Nicholls
Waen Glas and Pant Ddu mines, Maeshafn, Flintshire

Maeshafn “Big Covert” woodlands show an extensive historical record of past Lead/Zinc mining in Carboniferous Limestone. This walk will cover the ground that Keith described in his recent paper that was published in our newsletter. The full text is here: PbZn Mining Legacy for a full reference and guide.

Whilst there is some up and down on this walk - it is generally easy walking in woodland. And we will start and finish at the Miner’s Arms! The nearest shop for supplies on the day is Loggerheads service station.

Please contact Gary Eisenhauer by email or telephone to register your interest.


7