1 92 1. No. 8. 



ON THE ECLOGITES OF NORWAY. 



43 



The pyroxene from Saltkjael pre.sents an example of aluminous eclogite 

 pyroxenes in which the proportion o\' alumina is large!}' excessive over 

 the alkalies. Its excessive alumina is less than in the Swiss examples, and 

 it differs from these in the prevalence of ferromagnesia. 



The cl i n opy ro X en e is the most abundant constituent of the 

 aphanitic eclogite from Saltkjael. Garnet is the next in quantity, and 

 pale brown biotite is an accessory. Chi or i tic substances occuring be- 

 tween the rounded grains of pyroxene and garnet represent later products. 



T/ir Eclogifc-honiblciidrgabhro of Roiusdalshoni. 



The occurrence of eclogite-hornblendegabbro at the foot of Romsdals- 

 horn has been described by Th. Kjerulf'. The main part of that mountain 

 consists of granitic gneiss in which is enclosed a sheet-like mass of the 

 eclogite-gabbro, by Kjerulf named eclogite, measuring 70 feet in thickness. 

 Other thinner sheet-like masses consist of amphibolite. All these are 

 stratified parallel to the foliation of the gneiss. 



I propose to call this rock eclogite-hornblendegabbro, because it con- 

 tains both the minerals of an eclogite and those of a hornblende-gabbro. 

 An anah^is of the rock, executed bv the writer, gave the following results : 



Camptonose, III, 5, 3, 4. 

 Sp. g. 3.20 (t 12 I. 



Th. Kjerulf, Udsigt over det Sydlige Norges Geologi, 1879, pag. 222. 



