Ill 



epidote which occurs frequently iu crevices of granites and 

 syenites, and which are to Vie tal^:en as a product of lateral segre- 

 gation of these rocks. 



" Ig. Diorite, in huge masses west of main mass of Everard 

 Range." According to the microscopical examination of the 

 prepared rock-section, quartzose diabase of ophitic structure ; 

 quartz is only present in small quantities. As an accessory 

 constituent is to be mentioned apatite. Tlie same applies to 1h. 



" 8. MefMmorphic hornhlendic rock. Ten miles west of Camp 

 No. 2." Is gneiss. 



" lOu. Diorite. Protrudinglow granite hillstwomilesnortli-west 

 of Camp No. 4." Is quartzose diabase. Plagioclase and quartz 

 show partly granophysic structure. Some biotite is also present. 



" 11a, Diorite. Low hills between Gamps 4 and b." Is olivine 

 diabase. 



" 17. Diorite. Low hills near Camp 9." Is very compact 

 olivine diabase. 



"22. FelspatJwse rock. Low range, Camp 14." Is a very fine 

 granular granite. 



" 26. Diorite. Small veins in granite of Mount Sir Thomas." 

 Is diabase poor in olivine. 



" 33a. Porpliyrite. Dykes in porpliyritic syenite, Skirnii.sh 

 Hill." There are in the principal matrix of this rock porphyritic 

 orthoclase crystals. As the petography of to-day applies the word 

 porphyry only to porphyritic rocks containing plagioclase, the 

 term felsite-porphyry would be more appropriate. 



" 39. Diorite (Bell rock). Cavenagli Range." Is according 

 to the result of microscopical examination of the prejjared rock 

 section a very compact olivine diabase. 



" 40. Tachylite. Mount Cooper, Cavenagli Range." This rock 

 is of such an extremely fine grain, that I can not determine it, 

 even with the aid of the microscope on rock sections. 



" 41a. Granulite. Ten miles East of Camp 33, Barrow 

 Range." This rock resembles so closely the granulite of the 

 SaxoJi granulite-ellipsi.s, that it could have been found there as 

 well !* 



" 47. Felstone. Mount Squires." Felsite-porphyry {vide 

 N. 33a). 



" 48. Epidosite. Intruding as ^'eins, the syenite of Mount 

 Squires." These veins are results of lateral-segregation (like 1b), 

 and can not be looked upon as special rock formations. The 

 same is to be said about N. 49 and N. 49a. (quartzose diabase). 

 In the syenite of the Plauenshe Grund near Dresden these small 

 segregation-veins are of constant occurrence. 



'Herman Credner, Erlaeuterungen der geol. Special — Karte von 

 Sachsen, Soctionen Gerineswalde, G-lauchau, Rochlit/, Waldheiin. 



