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PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Dec. 18, 



as well as the marks of the septa, and these are more clearly seen 

 in proportion to the polish the stone receives. 



In order to see better the relations that the red limestones of the 

 epiolitic formation have with one another, it is necessary to cross the 

 Mis, and look to the left of the torrent between St. Giuliana and the 

 Rosse Alte, not far from Yedana. At the foot of the mountain the 

 strata of the conglomerate may be observed ; and these, being 

 parallel to those of the red ammonitic limestone, which lies over them, 

 appear to form with it one and the same deposit. The upper epiolitic 

 limestone reappears towards the top of the mountain, and does not 

 differ much in its appearance from the limestone of Igne, to which 

 it is parallel, although it exhibits a more arenaceous appearance, and 

 is less rich in fossils. Above this limestone, near the Rosse Alte, 

 rise the beds of the chalk*, which at the first glance would seem to 

 form a passage from the neocomian limestone of Alpago to the oolite 

 limestone, if the grains, irregularly scattered through its mass, were 

 not discovered to be organic remains similar to those we have re- 

 marked in the hippuritic neocomian limestone of the Pine and of the 

 Tambre in Alpago f. 



I shall give, some time or other, more circumstantial details of the 

 peculiarities I have observed in the two epiolitic limestones, in those 

 places in which I have been able to study them ; but at present I 

 shall confine myself to saying, that they sometimes cover, and some- 

 times flank, the dolomitic formation ; but they oftener constitute by 

 themselves alone the base upon which the cretaceous formation rests. 

 I remark here, in passing, that where the dolomite rises to great 

 heights, it never is covered by the epiolitic group, as some are inclined 

 to suppose, but appears instead to be crowned by more modern rocks. 

 The red limestones which we observe on the dolomitic summits of 

 the Valley of the Brenta belong to the neocomian formation, and 

 not to the epiolitic, or Oxfordian (as it is called by some). To the 

 same formation belong the regular beds of red limestone interstrati- 



Figs. 1 & 2. — Sections of the Red Ammonitic Limestones. 



Fig. 2. Rosse Alte. 



a Dolomite. c - Inferior epiolitic limestone. e. Neocomian ? limestone. 



b. Ammonitic conglomerate. d. Superior epiolitic limestone. 



* This white limestone, entirely free from flint, is quarried for the purpose of 

 being made into tubes of various lengths and of the diameter of half a foot, which 

 are to be substituted for the tubes of larch wood, hitherto used, for bringing to 

 Belluno the water of the springs of Fistere. 



t Memoria sopra le caverne delle Alpi Venete, p. 14. 



