Tag: geology
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Hard water: the world’s water hardness and the rocks behind it
A world map of water hardness from 16,682 river, lake and groundwater stations, and a simple model that guesses it from the rocks: Scandinavia’s median is 14 mg/l, the Yucatán’s 514.
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The rocks beneath: a geological map in the colours of 1969
An interactive geological map of the British Isles and the world, coloured with the palette of the 1969 Geological Map of the British Islands. Carboniferous rocks cover 17.5% of Great Britain, and England’s layers get younger all the way to London.
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Britain’s earthquakes since 1382: the big ones, the coalfield quakes and the biggest near you
I mapped all 7,032 earthquakes in the British Geological Survey’s catalogues since 1382. Britain has a magnitude 4 about every 3 years, and its busiest modern earthquake zones were coalfields.
