This post is to satisfy my inner need to write about these rocks, or mixes thereof … equally I don't want to bore you – I'm generous that way, aren't I? – tempt/inform you … but let you do the wandering …
|Various crystals - found in Canada|
Many scientists had wondered why so many of the Roman buildings are still intact after 2,000 years, while recent ones fall down or 'think about' collapsing …
I'd visited Canterbury Cathedral (in 2015) where repairs were being carried out after part of the stone tracery from the Great South Window had collapsed … details in links.
|Scaffolding seen when I visited|
Recently scientists appear to have found the magic ingredient behind ancient Rome's self-healing concrete …
|A large volcanic Tephra at Brown Bluff,|
Antartica - a particularly large tephra
It is believed that Tephra ... a fragmental material produced by volcanic eruption … is the magic ingredient the Romans added into their building mix … allowing damaged areas to self-heal before further building disaster occurred.
Next – Polyhalite – a natural multi-nutrient fertiliser – a by-product from the potash mined under the North York Moors/North Sea.
|North York Moors|
It's only recently been realised how environmentally valuable Polyhalite is – they use it on the hallowed turf at Wimbledon - four nutrients are found in one product - the Anglo-American site is informative.
The Polyalite layer of rock happens to be of motherlode proportions … the only known deposit being mined anywhere in the world, now shipped where needed as an organic agricultural fertiliser – so this country suddenly can add mining back onto its export list …
|Poldice Mine, east of Redruth|
|Crown Mines Botallack|
The Cornish landscape honeycombed with mine shafts is once again being opened up to exploration for essential minerals – copper, tungsten and importantly lithium …
|Artisinal miners, Kalio,|
Republic of Congo
Maybe we don't like mining our own lands – but surely we 'do it' more ethically, carefully and frugally as far as the environment is concerned – which has to be 'way better' than ripping the earth apart with little care in the world – as happens in for instance the Democratic Republic of Congo … or because of greed insist the populace work in inhuman conditions with little care for their health or lives.
As Ed Conway mentions in his book 'Material World: A Substantial Story of Our Past and Future' … dirty and grimy though mining may be – it is part of the human story.
|Ed Conway's book -|
that inspired some
of this post
The blurb notes 'Sand, salt, iron, copper, oil and lithium. They built our world, and they will transform our future.'
I have to say I really want to read this book – but am immersed in rather a large number of others – so it'll have to wait – but I will get there … it sounds extremely informative.
Our ancestors were, really, quite wise - I hope we take more note of their ways and knowledge ...
Canterbury Cathedral Scaffolding tour in 2015 (my blog post)
Julia and Hans Rausing Trust - informative article on the Cathedral and their donation towards saving the window.
Tephra - more info c/o Wiki
Massachusetts Institute of Technology article on Why Roman Concrete was so durable ... 'Riddle Solved'
Positive Letters Inspirational Stories