Professor Iain Stewart joins the Edinburgh Geological Society to look at scratches in the rocks of Blackford Quarry. In 1840 Swiss geologist Louis Agassiz argued that these had been made by ice, and that the shape of Edinburgh Castle's rock and the Royal Mile had been formed by ice. Animation is used to show how ice was forced round the hard rock to form the crag and tail.
- This clip is from:
- The Big Freeze
- First broadcast:
- 14 December 2010
Show pupils to clip and ask them to pay particular attention to the crag and tail (Castle Rock and Royal Mile). Students can research how that feature was formed using key vocabulary such as plucking and abrasion.