Las rocas catazonales de la región de Cabo Ortegal

Paragneisses and associated mafic igneous rocks have been subjected twice to regional metamorphism and extensive folding. During the first, catazonal, metamorphism, the mafic rocks have been converted to eclogites and pyrigarnites (hornblende-granulite facies rocks); both characterized by the association clinopyroxene — pyralmandine garnet. Later on, mesozonal regional metamorphism has caused extensive amphibolization; the accompanying deformation has caused refolding, mylonitization and large-scale boudinage. E-W trending faults are later than the mesozonal metamorphic phase. Criteria to distinguish between retrograde eclogites and retrograde pyrigarnites are given.