Trafalgar Square

1. Nelson's Column and base (1843): built of Foggintor Granite of Permian age from Dartmoor; Nelson's statue (Bailey, 1842), carved of Craigleith Sandstone from near Edinburgh.
2. The bollards, walls and statue plinths in the Square are of grey Aberdeen Granite.
3. Inlaid strips of Cornish Granite with big feldspar crystals occur throughout the Square.
4. Charing Cross Underground Station (Bakerloo Line). Much of the London Underground passes through London Clay.
5. 'Chequerboard' pavings of red Mansfield Sandstone, of Permian age, and white Portland Stone. Portland Stone is a hardy white limestone of Jurassic age.
6. Sandstone pavings from quarries near Edinburgh.

Learn more about Trafalgar Square's building stones in the Holiday Geology Guide available from the BGS Bookshop

• Trafalgar Square Holiday Geology Guide in the BGS Bookshop
• GeoBritain map