1.7K views · 40 reactions | We are the British Geological Survey. Our vision is for a safer, more sustainable and prosperous planet and a future based on sound geoscientific solutions  Watch our new video in full: https://www.youtube.com/watch?v=URTgniK-Mrw & read our new science strategy for 2019-2023, 'Gateway to the Earth': https://www.bgs.ac.uk/about/strategy.html | British Geological Survey | Facebook

1.7K views · 38 reactions | Check out this slice of Edinburgh’s history! This thin section shows Gullane Sandstone from Craigleith quarries, which supplied stone for Edinburgh Castle and New Town. Captured in polarised light, this well-sorted quartz-arenite is 72% quartz, with traces of feldspar, mica, and tourmaline  | British Geological Survey | Facebook