Peak Vihren (2915 m), Pirin Mts. |
The peak Vihren is built up of marbles of the Dobrostan
Formation (Rhodopian Supergroup; Precambrian) intruded by the Late Cretaceous
(not visible) and the Palaeogene Central-Pirin granite pluton (foreground,
lower half of photograph) |
Panorama of the Kroupnik fault
|
The panorama taken from the village of Kroupnik
shows the Kresna horst (part of the Pirin horst; dark background) separated
from the Neogene of the Simitli graben by the Kroupnik normal fault (seat
of the Kroupnik earthquake, M ~ 7.8; 1904) |
Panorama of West-Pirin fault zone |
The panorama shows the Sinanitsa part (marbles
of Dobrostan Formation) of the Pirin horst and the Neogene of the Sandanski
graben. Peneplain, mountain steps. At the foreground - metamorphics from
the eastern part of the Ograzhden horst (next photo). |
Ograzhdenian polymetamorphics, near Mikrevo |
Near Mikrevo (observation point for panorama above),
tourmaline-bearing biotite schists and gneisses of the Ograzhdenian Supergroup
are cross-cut by tourmaline- and garnet-bearing pegmatites. All rocks
underwent a new deformation event in amphibolite-facies conditions that
transformed pegmatites and aplites in quartzo-feldspathic gneisses. |
Contact of Teshovo pluton, Popovi livadi |
Road cut at Popovi livadi (second part of field
trip): contact and apophyses of the Palaeogene Teshovo granite pluton intrude
the Precambrian marbles of the Dobrostan Formation. |
Folded migmatites near Polena |
The road cut between the villages of Polena and
Kadiytsa exposes intensely folded (3 synmigmatic phases) of gneisses, amphibolites
and marbles of the Chepelare Formation,. Rhodopian Supergroup. They are
cross-cut by dykes and the main stock of the Palaeozoic? Kroupnik granite
pluton. |
Migmatite
cut by Kroupnik granite |
Apophysis from the Kroupnik granite (with thin
chilled margin) cutting anatectic migmatites of the Chepelare Formation.
Northern entrance of the Kresna Gorge. |