Metamorphic core complex

[3] High-grade metamorphic rocks (eclogite-, granulite- to amphibolite- facies) are exposed below the detachment faults (and mylonitic shear zones).

[citation needed] Amphibolite- to greenschist-facies, syndeformational metamorphism, and ductile-brittle to brittle deformation are shown on the upper-side (hanging-wall), with tilted geometries.

[3] are characterized by a generally heterogeneous, older metamorphic-plutonic basement terrane overprinted by low-dipping lineated and foliated mylonitic and gneissic fabrics.

Between the basement and cover terranes is a decollement and/or steep metamorphic gradient with much brecciation and kinematic structural relationships indicating sliding or detachment.

[5] Globally, core complexes are thought to be found in the Aegean Sea,[6] Anatolia, Iran, Tibet, north China, Slovakia,[7] Venezuela-Trinidad (Miocene), New Zealand and West Antarctica.