Fractures of the NE-SW oriented system have an outstanding 
  
concentration in the Debar-Gostivar-skopje belt (7), where 
they mark the Polog depression (8), and in the NidZe-KoZuf- 
Strumica belt (9). A remarkable feature in the second belt 
is the Bofiava fault (10), unknown until this study. It 
extends from Kajmakéalan along the Bofava river valley toward 
the Plaëkovica Mt.(11), which is over 120 km in length. 
Toward south, this fault is accompanied by several parallel 
fractures, controlling grabens and depressions of 
Aegaean Macedonia lakes. With some fluctuations in strike, 
to this system belong also the Prilep (12) and Titov Voelos 
(13) faults. 
Besides the members of these two systems, fractures of othor 
orientations have also been noted. Among the regional ones 
(over 50 km long), the most significant are fractures orion- 
ted N-S. Hajor faults are suva Gora-Cer-Pelister (14), 
Kumanovo-Babuna-western margin of the seleëka Ht.(15), and 
Studena Bara-Negotino (16). This system includes also the 
bordering faults of the grabens of Ohridsko (17) and 
Prospansko (18) lakes. 
The shorter faults, up to first ten kilemeters long, form 
interesting concentrations on 3kopska Crna Bora ¥t.(5) 
(oriented N-S) and the KoZuf t.(19) (western part - NN-SE, 
eastern part - N-9). 
RELATIONS WITH THE REGIONAL FRAME 
A larger area has been analysed on LANDSAT 1 scanograms 
1175-08541, 1175-08544, 1102-08482, 1102-08485, 1102-08491, 
1389-08421, 1371-08423, 1389-08421 and 1173-08431, on scale 
1:1,000,000, with the purpose of placing the territory of 
the SR of Macedonia within the general tectonic framework. 
The comparison with northern and southern areas was parti- 
cularly interesting: if a significant and presently active