Showing posts with label Geology. Show all posts
Showing posts with label Geology. Show all posts

Thursday, 20 February 2014

Sink Holes and Shale Gas Extraction - two birds with one stone

Now that sink holes have gone mainstream, The Daily Mail has published a handy map showing the most "at risk" areas:

It strikes me that there is a pretty high overlap between those "at risk" areas and areas which would be suitable for shale gas extraction:

Now, correct me if I'm wrong, but people don't want to live in a house which might be swallowed by a sink hole and neither do they want to live near where shale gas is being extracted. And as a society, we are better off building houses on solid ground and extracting the shale gas.

So great - we can relocate people away from the sink hole/shale gas overlap areas, build new house for them elsewhere (using recycled materials we get from carefully dismantling their existing homes) and then let the shale gas people get on with extracting the stuff, safely away from where people live.

(I'll refrain from explaining how the resulting land and natural resource rents could be collected for national benefit, let's get the basics right first).

Friday, 20 September 2013

Things which came from space

1. Life

2. Gold nuggets

3. Everything else

FFS.

The whole of Planet Earth came from space, it's just a load of rocks and iron and stuff which was whizzing around in space and which clumped together over a period of millions or billions of years.

One of those rocks will have had "life" on it, and I'm not sure it's relevant which one. We can decide an arbitrary date for when the clump was big enough to count as Planet Earth, so whether life originated on Planet Earth or not depends entirely on whether that that date is after or before the time that the rock bearing life arrived here.

And I suppose the order in which things arrived is quite interesting, but they all came from space.

Wednesday, 5 August 2009

Two more fridge magnets ...

First, Crackington Haven.

We first heard of this place in some TV show like 'Relocation, Relocation, Relocation', in which a potential relocator dreamed of having a holiday home there. As my kids are foul mouthed yobs like me but Mrs W is very strict about swearing, we promptly adopted "Crackington Haven!!" as a fallback expletitve (you have to say it forcefully and bang your fist in time).

The beach is quite fascinating, as the cliff on the right hand side is made up of layers of brown and orange rock, with vertical white lines running up through the (thicker) orange layers, but not the (thinner) brown layers. This cliff has crumbled in the time honoured fashion of a layered cake, so that the layers can be easily recognised, even where they are diagonal to their original lie.

On the left hand side, the (rather lower) cliff is pure grey slate, which has cracked and slid across itself in a very geometric fashion, creating triangles and diamonds, some a few inches across and some several yards across.

The dividing line between the two is just to one side of the river that flows down and across the beach, where there is swirly grey and brown rock, which is not layered at all but looks more like wood grain. The first few feet of slate also have the white seams, which appear to be harder than the slate as they stand slightly proud, i.e. the slate is being eroded slightly faster than the white stuff.

Next up, Boscastle, which we'd only heard of because of the flash floods back in 2004. They've had twice as many visitors since then, of course, which is why they've extended the ill-fated car park that was partly to blame for the original flood. The old car park is still tarmac'ed over and just as much of a flood risk as ever, but the surface of the new car park further up the valley is made up of a honeycomb-style plastic matrix (each hexagon being two inches across) with soil and gravel packed into each hexagon to allow rainwater to soak away quickly.

Apart from that, it's all been rebuilt/tarted up very nicely - what sticks in the craw is that this was paid for by a £4.6 million grant from The Environment Agency, rather than a precept on local Business Rates or Council Tax - if such expenditure is directly for the benefit of people who own buildings in the area at risk, then they can pay for it themselves, AFAIAC ...

PS, if you're scared of heights and/or you are an Elfin Safety enthusiast, steer well clear of the harbour bit.