ELEPHANT AND CLARENCE GROUP 



87 



Table 6 



I. 



B. 



D. 



3- 

 4- 

 E. 



Chlorite-actinolite-clinozoisite-albite-schist ('very schistose'), Clarence Island. Anal. E. Kluver Quoted fram Barth 

 and Holmsen, op. at. supra, p. 60. This rock is briefly described as containing chlorite actinolitic hornblende, clino- 

 TotiieZd aibite (An,,) Calcite and quartz occurred in fissures. It is stated that the latter minerals were removed 

 before the analysis was made (Barth and Holmsen, p. 59). ,,ttii r^ . a tv„„, F H Kranrk 



Ophiolitic greenstone, north of Monte Olivia, Ushuaia, Tierra del Fuego^ Anal. L. Lokka. ^^^^^1 °f E" f^^'^'l; 

 Ob cit siJm p III. This rock is stated to be an 'effusive' associated with slates and phyllites of the Yahgan (or 

 Mt BuckIand)'^Formation (probably Lower Mesozoic). It is sheared and mylonized m places. The freshest material 

 2wfoligoclase (An,,) and augite altering to hornblende. Chlorite, epidote, actmohte, sphene altering to leucoxene 

 quartz, and aibite, occur in the highly sheared varieties. In its geological associations and petrography this rock is 



T'rlmohL^rr— ne^slones dredged near the Shag Rocks, about 130 miles west of South Georgia. New analysis 



So';^SSr:;t^iSlSSXr('not very schistose'), Clarence Island. Anal. E. KlU^^ Q^-^;;^- ;S 

 and Holmsen oP cit supra p. 60. This rock is stated to be a ' common schistose greenstone, the constituent minerals 

 Jrwhich are IreenbSit, '^actinolitic hornblende, ferriferous epidote, and aibite (An«). [From the analysis it is 

 toleTably certain that quartz should be added to this list.] The summation of this analysis is incorrectly given as 99-82 

 in R-irth and Holmsen but is correctly stated in Holtedahl, op. cit. supra, p. 109. 



Sheared tuff from r;;ra^e, Virik Harbour, South Georgia. Anal. E. Kluver. Quoted from Barth and Holmsen, 

 IplTsu^ra pTo- These uffs contain fragments of keratophyres, trachyandesites and spilites (see G^W. Tyrrell 

 'Petrtraphv and Geology of South Georgia, 'Quest' Report {Brit. Mus. Nat. //»/.), 1930, PP- 35-7)- This aialys^^ 



- ^' ^""'','?• P\ T^;t Lnf the Yahgan fMt Buckland) Formation. It shows films of chlorite and mica winding 



Grevwacke fKulm) Steinbach, Frankenwald, Germany. Quoted from R. Ligenteld, uie rvuimcu g 

 SuSmtz in. Fnt!;kenwalde,':4M. Math.-Phys. Kl. Sachs. Akad. W,ss. xlu, no. i, i933, P- 58- 



