File:Rip Rap at Beesands - geograph.org.uk - 69705.jpg - Wikimedia

Twatt - Airfields of Britain Conservation Trust UK

Arizona Rip Rap & Boulders

File:A look down Park Street, Aberdeen - geograph.org.uk

File:Gravel Texture (11902620963).jpg - Wikimedia Commons

R - Bombing Science

X6BN RAF Banff (WWII) - Scenery Packages - X-Plane.Org Forum

File:Rip rap, Seaton Hole - geograph.org.uk - 770914.jpg

Rip rap hi-res stock photography and images - Alamy

File:Erosion and deposition - geograph.org.uk - 1222640.jpg