Yes the demand for tungsten during the war led to the opening of tungsten mines, Hemerdon, Cligga and castle an dinas to name a few, as well as increased production from crofty.

Tungsten is used to create very hard alloys and was used extensively in guns and armour.

With regards to the Mine/Quarry debate, in general terms a quarry removes a product where there is no processing (Save for cutting and crushing) while a mine removes an ore requiring concentration. There are exceptions, coal being one, although most coal does require further treatment before it becomes a saleable product, and Iron Ore mines, where the ore in amny cases can go straight for smelting.

The open pit/open cast is another definition to be fathomed!

What about sand, clays, and maybe gypsum - none need (much) concentration, but all are/have been worked (in modern parlance) from mines as well as open pits.

Name changed to mine in the interests of peace & harmony 😉

Of more importance, why are there four entries in the database for this location. One is a granite quarry the other a wolfram mine but there are two other entries in capitals (CASTLE-AN-DINAS NEW & OLD mixed mines) with slightly different grid refs. Which if any should be consolidated into the one entry for the wolfram mine assuming that is the correct one.

http://www.aditnow.co.uk/list-uk-mines-quarries/?letter=c 

Another can of worms? :confused:

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Ever wish you'd never started a thread? 🙂

The Wolfram mine is at the same location given in mindat so I assume it's okay. The granite quarry isn't at Castle-an-Dinas and the GR is okay. The other two entries I have no idea but they both contain data and must have some connection to the Wollfram mine.

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What about sand, clays, and maybe gypsum - none need (much) concentration, but all are/have been worked (in modern parlance) from mines as well as open pits.

aha! but neither are freestone or dimension stone, my definition wins :guns:

I see today is the day of the Pedant's Revolt.....

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Just consider yourself lucky that all you have to really think about in Derbyshire is mines!

It's curious how both names are Castle-an-Dinas.

Since An Dinas is Cornish for Castle, it's odd how the English Prefix is there on both counts.

Was there any such monument at CAD Quarry?

There was a Hillfort in the area. http://www.themodernantiquarian.com/site/4114 

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A bit like all the River Avons. Imagine the Saxons interrogating the wily local Brit.

"Excuse me, my good man, what do you call this?"

"That, my friend, we call 'afon'"

"Ah! Excellent! 'River Avon'. Thank you so much, here's a groat for your trouble".

"No problem - anytime you want more help, just ask". {snigger, snigger}

I blame the Roy's, they seem to have added the other two 😉

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As seen on Google. The quarry and fort that is in case........

🔗Personal-Album-272-Image-43843[linkphoto]Personal-Album-272-Image-43843[/linkphoto][/link]

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Clay (Well china clay certainly) I would argue that it doesn't need much concentration! Take a look around the processing plants, have a look at the size of the waste tips. Every tonne of clay yields in the region of 100 tonnes of waste, that is massive concentration.

I was referring to fullers earth and ball clay, both of which have been mined. Have there been any subterranean china clay mines?

Now correct me if I am wrong and I know you will but this is the situation as I understand it.
On Simons thread he tells us that Cornwall Council have bought Castle an Dinas Granite quarry which lies near Ludgvan north of Penzance. Its a granite quarry for MINING granite.
There is a hill fort of that name adjacent to the quarry.
By coincidence of nomenclature there is another Castle an Dinas (and maybe others as well perhaps). The other Castle an Dinas is a wolfram mine north of the A30 near St Dennis.
There is also a hill fort adjacent to this mine.
The two Castle and Dinassssss are about 34 miles apart as the crow flaps.

Castle an Dinas the wolfram mine is in two bits, the old bit roughly from the hill top south and the new bit northwards.
I not aware of much on the old bit but I have dropped a pic into the archive section of castle an dinas new, taken about 1980. The underground works there are extensive.
From the pic the fact that we had to cart car batteries and brownie cameras underground in order to get really poor quality pictures you will see how lucky you all are that LED lights and digital cameras have all been invented to make life easier.
The yellow tinge was actually as it is, a very yellow, soft, crumbly unsafe to be. Naturally we spent several trips in there!
The mine closed about 1958 but even by 1980 was EXTREMELY dangerous with many roof falls and unstable ground. 30 years on it may not be accessible.
Has anyone been in recently?

Now you can all correct me..!!

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No but the china clay pits down here are mines not quarries.

No Doug, its Granite quarry for quarrying granite.

There is an excellent longitudinal section of the underground workings of Castle-an-Dinas c. 1957 in Tony Brook's book on the mine. I can't upload it for obvious reasons.

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Has anyone put the Kimmeridge oil mine in the database yet? Or is it a quarry? Actually, I know there is a shale mine there, but I mean the thing with the nodding donkey.

Has anyone put the Kimmeridge oil mine in the database yet? Or is it a quarry? Actually, I know there is a shale mine there, but I mean the thing with the nodding donkey.

Surely that's an oil well :angel: