ETTBOPE. 67 



answer to Prof. Segucnza's notice. See Geological Record for 

 1875, pp. 65, 98.] BoIL IL Com, geol. Ital. t. vii. pp. 149-154. 



Gallet, A. E. Exploration dcs cavernes des Alpes. Les puits auri- 

 ftres de Cocrair au Mont-Clairgeon (Haute-Savoie). [Caves of 

 the Alps. Auriferous pits of Cocrair on Mont-Clairgeon, U. Savoy.] 

 Bull. Club Alp, Fran^. p. 77. 



Garland, Joseph. Phosphorite Mining in Nassau. 43rd Ann. Rep. 

 li. Cornwall Pol. Soc. pp. 96-107, 2 woodcuts ; and Rep. Mmers 

 Assoc. Cornwall for 1875, pp. 10-19. 

 The phosphorite occurs in the form of irregular beds or pockets, 6 in, 

 to 6 ft. thick, along the irregular junction of a bed of clay with Devo- 

 nian limestone. The methods of mining are described. C. L. F. 



Gastaldi, Prof. B. Spaccato geologico liingo le valli superiori del Po 

 e della Varaita. [Section along the Valleys of the Po, &c.] Boll. 

 R. Com. geol. Ital. t. vii. pp. 104-111, plate. 



The section first crosses the large mass of gneiss which stretches for 

 67 kilometres between the Dora lliparia and Varaita valleys ; this 

 oldest rock contains layers of graphite, white steatite, and crystalline 

 limestone. It is overlain by the next great series of ^' pietre-verdi,* 

 the junction being marked by a band of limestone and calcareous 

 schists ; these green-rocks contain a great variety of serpentine and 

 cuphotide rocks, and show plainer signs of bedding than the gneissic 

 series. They have a breadth of 22 kilometres. Above them come 

 quartzitcs, forming the summit of Monte Pelvo ; next calcareous schists ; 

 and then another horizon of quartzitcs with traces of anthracite, which 

 the author considers may be the base of the Palaeozoic zone. He has 

 previously called the green -rocks Huronian, or Cambrian, and pre- 

 pala3ozoic [see Geological Record for 1874, p. 65]. The serpentine 

 rocks of the Apennines and other parts of the peninsula are held to bo 

 offshoots from the Alpine series, and of the same age (older than the 

 Trias). E. B. T. 



Gastaldi, Prof. B., and Prof. Baretti. Sui rilevamonti geologici in 

 grande scale futti nolle Alpi Piemontesi nel 1875. [Large-scale 

 Geological Surveys in the Piedmontese Alps in 1875.] Atti M, 

 Ac. Line. ser. 2, t. iii., 7 pp., plate (sections). 



Geinitz, Prof. H. B. [On OrtJiis in hornblende -schist.] ZtitscU, 

 deutsch. (jeol. Ges. Bd. xxviii. Heft 3, pp. 643, 644. 



Notices the occurrence of impressions and casts of an Ortlm^ similar 

 to a Devonian or a Primordial one, in a green metamorphic schist, con- 

 sisting of quartz hornblende and much magnetite. E. B. T. 



Gesell, Sander. Adatok a maramarosi m. k. banyaignzgatdsaghoz, 

 etc. Budapest. 



Gilli^ron, — . Les anciens glaciers dans la valU'e de la Wiese, dans 



f2 



