283 

 Appendix. 



For a more detailed examination of the curious minerali- 

 ferous limestones mentioned on pp. 167 and 170, I addressed 

 myself to Dr. 0. B. Bøggild, from whose valuable exposition 

 1 quote the following^): 



"Even the purest limestone of which samples were hrought 

 back (from the southern valley) contains tremoiite and pale mica. 

 As a rule the limestone is very rich in minerals: orthoclase, 

 diopside, chondrodite, titanite, spinel, and possibly quartz, while 

 furthermore biotite, hornblende, and a few minerals that could 

 not be determined, occur. Sometimes the calcite retires and 

 we get large masses consisting of hornblende, pyroxene, biotite 

 and even quantities of scapolite. Pyroxene and hornblende 

 sometimes occur in parallel intergrowths. 



In both occurrences the limestone is traversed by granitic 

 veins which, however, have not given rise to any contact-meta- 

 morphosis, though on the other hand the rock-mass is exceedingly 

 varied and peculiar just in the neighbourhood of these. A vein 

 of granite with strongly weathered plagioclase is surrounded 

 on both sides by a narrow belt of similarly strongly disintegrated 

 plagioclase, with its boundary lines well marked against the 

 granite. In this plagioclase there are numerous grains of horn- 

 blende, pyroxene, and titanite, and the whole passes over 

 gradually into a mass of predominating pyroxene, though with 

 traces of the other minerals mentioned. Still further out we 

 come across a strip of hornblende, and finally a laminated mass 

 of mica. Peculiar is especially this as it were symmetrically 

 Gratified arrangement, which can scarcely be explained by 

 contact-metamorphosis from the granite." 



I may add that I am by no means convinced from what 1 

 >aw that we have to deal here with a young granite. However, 



Ч For this vnluable assistiince I here express to Dr. Bøggild my sin- 

 cere thaniis. 



