CHAPTER XVI. 



Miocene alluviums Auvergne Mont Perrier Extinct quadrupeds Velay 



Orleanais Alluviums contemporaneous with Faluns of Touraine Miocene 



fresh-water formations Upper Val d' Arno Extinct mammalia Coal of Cadi- 

 bona Miocene volcanic rocks Hungary Transylvania Styria Auvergne 

 Velay. 



IN the present chapter we shall offer some observations on the 

 alluviums and fresh -water formations of the Miocene era, and 

 shall afterwards point out the countries in Europe where the 

 volcanic rocks of the same period may be studied. 



MIOCENE ALLUVIUMS. 



Auvergne. The annexed drawing will explain to the reader 

 the position of two ancient beds of alluvium, c and e, in Au- 



No. 54. 



Position of the Miocene alluviums of Mont Perrier (or Boulade~). 



a, Newer alluvium. e, First Miocene alluvium with bones. 



b, Second trachytic breccia. /, Compact basalt. 



c, Second Miocene alluvium with bones, g, Eocene lacustrine strata. 



d, First trachytic breccia. 



vergne, in which the remains of several quadrupeds character- 

 istic of the Miocene period have been obtained. In order to 

 account for the situation of these beds of rounded pebbles and 

 sand, we must suppose that after the tertiary strata g, covered 

 by the basaltic lava /, had been disturbed and exposed to 

 aqueous denudation, a valley was excavated, wherein the allu- 

 vium e accumulated, and in which the remains of quadrupeds 



