rockfall
nounEtymology From rock + fall.
1
A quantity of rocks that has fallen from a cliff etc.
- A 200-ton rockfall recently blocked the Machynlleth sidings, trapping several locomotives; a rock-slip on the approach embankment to Talerddig required expensive revetting last year; and on the coastal section to Barmouth an 80 foot-high stone revetment was completed some time ago at Friog; [...].1964 December, Mark Bourne, “The rejuvenation of the Cambrian line”, in Modern Railways, page 390:
- Design work is now complete on the Parsons Tunnel North programme, which envisages a 209-metre rockfall shelter built from a jack-up barge as there is no road access.2020 July 15, Andrew Roden, “Network News: COVID-19 delays Dawlish resilience completion”, in Rail, pages 24–25: