As the subsidence continues, the fringing reef becomes a barrier reef, and ultimately an atoll reef. 1  Darwinâs theory starts with a volcanic island which becomes extinct. 2  As the island and ocean floor subside, coral growth builds a fringing reef, often including a shallow lagoon between the land and the main reef.
wikiHow to Bump a Lock. âBumpingâ is a lock-picking technique that refers to the repeated striking motion used to dislodge the pins inside a lock. Doing this requires a specially cut key, known as a bump key, that with the right application can be used to force open 90% of cylindrical locks.
One such technique is called âbumping.â Lock bumping, also referred to as key bumping is an attack technique using specially cut keys, known as bump keys, that can defeat conventional pin and tumbler door locks.