1823. J the principal Mountain Chains of Europe. 289 



(H.) Hungary. 



According to Beudant, rocks referable to the Jurassic series 

 occur principally in two localities ; first, on the south-west, 

 extending northwards from Lake Balaton or Platten ; and 

 secondly, on the south-east towards the borders of Transylvania 

 above the sources of the river Korosh. 



He gives the following list of these formations : 



1. An encrinal limestone (most probably the muschelkalk) : 

 this is most abundant in the second district, but occurs also in 

 the first 5 it is covered by 



2. A magnesian limestone : not the same with the English 

 magnesian lime or zechstein, but associated with, and constitut- 

 ing a part of the true Jurassic limestone which covers it : it 

 exhibits three varieties : a. Saccaroidal ; b. Compact; c. Oolitic. 

 This formation abounds in the first district between Bude and 

 Lake Balaton. 



3. Jurassic limestone : a. Containing hippurites ; b. With 

 great oysters; c. With mumnulites ; d. Abounding in shells; 

 e. Bituminiferous. This exists in many patches throughout the 

 first district between Gran and Lake Balaton. 



(I.) Russia, and other imperfectly ascertained Localities. 



In Russia, the lias certainly occurs near Moscow, but we 

 have no distinct particulars concerning the secondary formations 

 of that vast country. 



The tracts of these formations in England, Fiance, Germany, 

 and Russia, may be considered as parts of a continuous series 

 of deposits occupying the great central basin of Europe. That 

 on the Italian side of the Alps, although necessarily mentioned 

 in connexion with that chain, belongs to a distinct and southern 

 basin, of which a great part of Spain also probably forms a 

 portion. Much of the limestone of that country may perhaps 

 prove to be lias, and the oolites are distinctly described by Mr, 

 Townshend as extending round Anchuela del Campo, about 

 half way between Saragossa and Madrid. 



(To be continued.) 



New Series, vol. v. u 



