Geology.. 87 



Quadrangle, will be, when desired, furnished separately at the 

 nominal cost of five cents each. 



4. Geological Survey of West Australia. — The folio wing- 

 publications have recently been received : 



Annual Progress Report for the year 1908. Pp. 19, 3 maps. 



Bulletin No. 32, containing : Greenbushes Tinfield, by A. Gibb 

 Maitland, A. Montgomery, W. D. Campbell, and Mr. E. S. Simp- 

 son. Pp. 75, 2 maps, 2 plates, and 7 photos. Mount Malcolm 

 Copper Mine, by Harry P. Woodward. Pp. 8, 1 plate. Fraser's 

 Gold Mine, Southern Cross, by Harry P. Woodward. Pp. 6, 1 

 map, 1 plate. 



Bulletin No. 35, containing Geological Report upon the Gold 

 and Copper Deposits of the Phillips River Goldfield, by Harry P. 

 Woodward. Pp. 104, 2 maps, 8 plates, 7 photos. 



Phosphate deposits have been discovered near Christmas Island, 

 where a layer of phosphatic travertine 153,600 square yards in 

 area and with a thickness of two feet has been investigated. The 

 travertine is believed to owe its origin to capillary attraction, 

 drawing up ground water from the lime contained in the under- 

 lying sands. In an investigation of the Green Bushes Tinfield 

 (Bulletin 32) examination was necessarily made of the laterite of 

 this region, which has a wide distribution and varies in composition 

 from solid and pure limonite to aluminous rocks almost destitute 

 of iron and often so tough that explosives have little effect. The 

 distribution and character of the laterite in the Green Bushes 

 region " clearly indicates periodic and zonal changes in the climatic 

 conditions." In connection with the petrographic description of 

 the crystalline rocks of the Phillips River (Bulletin 35) analyses 

 were made of the following types: soda-granite, spodumene, 

 albite, and eclogite. h. e. g. 



5. (Jontribuzioni alio Studio Petrographico delta Colonia 

 Eritrea ; by E. Manasse. 4°, pp. 168, 8 plates and map. Siena, 

 1909. — This work is based upon the collection of rocks made by 

 Profs. G. Dainelli and O. Marinelli during their geological 

 researches in the Italian colony of Erythrea, East Africa, in 

 1905-1906. After a brief sketch of the geology of the area 

 visited, the main body of the w T ork is devoted to a detailed report 

 of the results of a thorough petrographical study of the 

 specimens. The author first describes, rather briefly, a series of 

 schists of various kinds, including some porphyroid, mica schists, 

 amphibolites, gneisses, etc. Then the igneous rocks are treated, 

 and these were found to consist of granites, some of which, as 

 shown by the analyses, are of alkalic character with predominant 

 soda : diorites of several types ; a hornblendite which is a local 

 facies of diorite, and two specimens of teschenite. There are also 

 dike rocks, granite and diorite prophyries, aplites, paisanite, 

 bostonite, tinguaite, malchites and among the lamprophyres, 

 kersantites and camptonites. The effusive rocks or lavas are also 

 not wanting and include quartz porphyry, rhyolite and rhyolitic 

 tuffs, obsidians and pumices. Dacite and a great variety of 



