62 Dr Boue on the Geography and Geology of 



tance, their igneous nature ; they look like volcanos which have 

 left cones of scoria. These trachytes seem to run N. and S., 

 or N. £. and S. W. ; and they extend not only to the north, 

 but also to the south along the river Egridere. They occupy 

 the greatest space on the right side of the river, and only occur 

 overlying, or in juxta-position to, the talcose slates and mica 

 slates on the other side. Indeed the trachyte extends to very 

 near Karatova, and thence at least six or seven leagues to the S. 

 and S. W. of the Breganitza river. 



These trachy tic deposits consist of trachyte containing mica or 

 hornblende, surrounded by vast masses of trachytic conglome- 

 rate, which are well seen between Shinnie and the alluvial ba- 

 sin of Strazin, or between the convent of Dveotatz and the 

 Breganitza ; some are whitish, greyish, and sometimes having 

 the appearance of pumice. Semi-opal is found among them, 

 even in the form of a whitish or greyish-black silicified bed, as 

 at the northern entrance of the Egridere among the trachytic 

 rocks. To the west of Karatova, at the distance of one or one 

 and a half leagues from the town ; there is also a great quan- 

 tity of whitish trachytic conglomerate, and a conical hill of 

 hornblendic trachyte is surrounded by it. A singular circum- 

 stance is, the association of ihese conglomerates with the ter- 

 tiary sandstone and conglomerates, as is seen on the road from 

 Karatova to Strazin, and particularly near the inn called Vuk- 

 han (inn of the Wolf). The superposition of the trachytic 

 conglomerate on the talcose (occasionally ferruginous) slates is 

 evident in many places on that road; but tertiary quartzose 

 conglomerates, aggregations of slaty fragments, and molasse, 

 are also observed there in a pretty high situation. In the de- 

 scent between Vukhan and the valley of Karatova, we can 

 distinctly see, resting on the talc-slate, horizontal tertiary 

 beds composed of quartzose conglomerate with fragments of 

 felspathic rocks, micaceous slaty sandstone, quartzose conglo- 

 mei'ate, and molasse. Now these rocks seem to be connected 

 with the molasse and slate conglomerate which occur a little 

 higher up, in beds slightly inclined, and occasionally much pe- 

 netrated by calcareous matter. These last, indeed, are nothing 

 else than a limestone with fragments of slates, oysters, encri- 

 nites, and echinites (as at one-fourth of a league north of Vuk- 



