平へい行こう不ふ整せい合ごう

noun, noun which may take the genitive case particle 'no'

disconformity; parallel unconformity

Geology term for a type of unconformity where the strata above and below are parallel, indicating a period of non-deposition or erosion without tilting.

• この地ち域いきでは、平へい行こう不ふ整せい合ごうが観かん察さつされる。

  A disconformity is observed in this area.