262 Dr Boue on the Geography and Geology of 



contain some of the same kind. Indeed, it would be remark- 

 able if, in Hungary, a country containing so much cretaceous 

 nummulitic limestone, as in the Bakonywald and near Pest, 

 hippurites should be entirely awanting. I also saw in Bel- 

 grade a reddish coarse marble like the Italian Scaglia, and the 

 well-known marble of Dotis in Hungary. I was told that it 

 came from Eastern Servia, Can it also be a chalky rock ? 



Next year I shall visit the secondary limestones of Gallipoli 

 and the Dardanelles, the age of which my travelling com- 

 panions have perhaps already determined. 



A very large portion of European Turkey consists of the ter- 

 tiary series. The greatest basin is that of Wallachia and Bul- 

 garia^ which is filled up with marls partly saliferous (slatina), 

 molasse sands, and some limestones with shells. In lower Bul- 

 garia and the Dobrutscha, a vast deposit of this kind seems to 

 predominate, which in many places renders the country hilly 

 to the banks of the Danube. This formation extends to all 

 the great annexed basins, as those of the Wid, the Isker, the 

 Timok, he. In this last I found, near Gorguschevatz, argilla- 

 ceous marls with bivalve shells, as also inclined molasse beds. 

 Tertiary shelly limestone occurs near Negotin. 



I was very anxious to determine if the tertiary sea had ex- 

 tended from the Bulgarian basin to that of Servia. The most 

 likely place I could find for this supposed connection, is be- 

 tween Nissa and Gorguschevatz, being the lowest part of the 

 chain from the Danube to Sophia. Indeed to the N. E. of 

 Nissa, the limits of both basins come very near each other for 

 some miles. Yet I could not find the molasse beds extending 

 from one side of the secondary limestone ridge to the other, 

 although the sandstones were to be seen at a slight elevation 

 below the low pass at Grenada. Farther to the north I twice 

 crossed the chain, but found an ancient communication to have 

 been quite impossible, the ridges of secondary limestone being 

 too high. I therefore conclude, that, if no connexion existed, 

 the Servian Sea was separated from the Bulgarian one, only 

 by a very small ridge in the neighbourhood of Nissa. 



The basin of Sophia is another great subordinate portion of 

 the Bulgarian- Wallachian tertiary basin, and was only separated 



