Petrological Abstracts and Reviews 



ALBERT JOHANNSEN 



Flett, J. S., and Hill, J. B. The Geology of the Lizard and Meneage. 

 Mem. Geol. Surv., Sheet 359. London, 191 2. Pp. 280, pis. 

 15, figs. 10, bibliography 10 pp. 



The rocks of the Lizard, probably of Archean age, represent an 

 igneous complex of serpentine, gabbro, and gneiss, surrounded by an 

 aureole of hornblende-schists and metamorphosed sedimentary rocks — 

 mica-schists, green-schists, and quartz-granulites. The hornblende- 

 schists were originally basic igneous rocks, but they are now so much 

 altered that their original character as extrusive, tuff, or intrusive cannot 

 be determined in every case. Some of them contain sedimentary mate- 

 rial and possibly represent volcanic ashes. The time that elapsed 

 between the formation of the schists and the intrusion of the serpentine 

 is not known, but most of the rocks of the aureole probably were already 

 in a metamorphosed condition at the time of the intrusion of the basic 

 rock. Besides the serpentine there is also a coarse hornblende-schist 

 in some places, which may represent dolerite sills intruded immediately 

 before the basic rock. 



Numerous chemical analyses and photogravures of thin sections 

 make the memoir a valuable work for reference. It is a notable con- 

 tribution to the literature of serpentine. 



Flett, J. S. "The Geology of the Lizard," Proc. Geologists 1 

 Assoc., XXIV (1913), 118-33, pl s - 3> ma P T - 

 A brief summary of the preceding paper on the geology of the Lizard, 

 intended for the use of members of the Geologists' Association on their 

 Easter excursion, 19 13. 



Flett, J. S., and Hill, J. B. "Report of an Excursion to the 

 Lizard, Cornwall," Proc. Geologists' Assoc, XXIV (1913), 

 313-27, pis. 4. 



Foye, Wilbur G. " Nephelite-Syenites of Haliburton County, 

 Ontario," Amer. Jour. Sci., XL (1915), 4 I 3~3 6 ) n S s - 9- 

 The nephelite-syenite laccoliths of Haliburton County, central 

 Ontario, are described together with the associated rocks. A number 



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