﻿Vol. 6 1.] 



DOLOMITES OF SOUTHERN TYROL. 



107 



The following seven analyses are from scattered localities within 

 a few miles of Cortina : — 



Giau Pass. 



No. 37 was from the Giau Pass, 

 about 6 miles south-west of 

 Cortina. The specimen was not 

 in place, but the altitude of 



over 7000 feet at which it was found renders it probable that the 



rock belongs to the Schlern-Dolomite horizon. 



No. 

 37. 



CaC0 3 . Mg00 3 . 



Per cent. Per cent. 



91-5 I 7-4 



Insol. res. 



Per cent. 



113 



No. 

 56. 



59 



Hexenfeli 



j Ca0O 3 . 

 i Per cent. 

 . 54-33 



MgC0 3 . 



Per cent, 

 45-36 



Insol. res. 



Per cent. 



005 



Travernanzez Valley, 



60-0 



395 | 



046 



Sorapis. 

 55... I 55-5 I 43-< 



| 1-20 



Nos. 56 & 59 were collected about 

 7 or 8 miles west of Cortina, 

 No. 59 being from just below 

 the junction with the Eaibl 

 Beds. 



No. 55 was collected from the 

 western flanks of Mount Sorapis, 

 about 4 miles south-east of 

 Cortina. 



46 



40 

 41 



Monte Cristallo. 



58-5 



38-3 



Tre Croci. 



07 -ii 



54*6 



42-5 

 43-9 



3-20 



0-26 

 1-53 



No. 46 was from the south side of 

 Monte Cristallo, just below the 

 junction with the Raibl Beds. 



Nos. 40 & 41 were taken from an 

 exposure of St. Cassian Dolomite, 

 east of Tre Croci. 



It will be seen that Nos. 40, 56, & 59 contain only a small 

 amount of residue, while the remaining specimens have over 

 1 per cent. With the exception of No. 37, the rocks are highly 

 dolomitic. 



The Diirrenstein Area. 



No. 6Q came from the summit of the Diirrenstein (9300 feet). 



Nos. 67, 68, & 69 were taken 

 during the descent to the Seeland 

 Alp. No. 72 came from the 

 eastern base of the Strudelkopf, 

 the southern continuation of the 

 Diirrenstein massif. Nos. 68 & 

 69 contain a relatively - high 

 amount of residue, the remaining three specimens practically none, 

 while all are dolomites of well nigh theoretical composition. 



No 

 66 

 67 

 68 

 69 

 72 



CaC0 3 . 



MgC0 3 . 



Per cent. 



Per cent. 



55-2 



44-8 



54-5 



45-5 



552 



43-9 



54-4 



44-3 



54-2 



45-7 



Insol. res. 

 Per cent. 



0-026 



1-93 



1-26 



