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III
Allochthonous terranes involved
in the Variscan suture of Galicia:
A review of their origin and
tectonothermal evolution
3.1. Introduction
3.2. Partial conclusions
3.3. Article
3.1. Introduction
The article presented in this chapter represents
the geological framework in which the rest of
the thesis is englobed. It is an up to date review
of the already published knowledge about the
origin and the evolution of the terranes from the
allochthonous complexes of Galicia. One of these
terranes is the Upper Allochthon (Upper Units),
in which the formations studied in this thesis are
included.
3.2. Partial conclusions
As this chapter is a review and intends to be
the geological framework for this PhD thesis
there are no
s.s.
conclusions to mention. Even so
a synthesis of the major aspects of the geology
concerning the Upper Units of the Cabo Ortegal
Complex is presented here on.
TheUpperUnits(alsocalledUpperAllochthon)
represent the thickest terrane of the allochthonous
complexes and they are constituted by a variety of
units that can be grouped in two main ensembles
according to their tectonothermal evolution: an
upper ensemble characterised by intermediate
pressure metamorphism (IP Upper Units),
and a lower ensemble affected by high pressure
and high temperature metamorphism (HP-HT