fault line

See also: faultline and fault-line

English

fault line (plural fault lines)

(geology) The line formed by the intersection of the plane of a fault with the surface of the Earth
(by extension) A minor split (in public opinion etc) that may develop into something larger
- 2016 October 22, Rami G Khouri, “Lebanese oligarchy preserves its interests once again”, in Aljazeera‎:
  Yet the process may lead to new fault lines and resentments across the notoriously unstable Lebanese political system whose 18 different confessional groups share all levels of power.

geology: intersection