PEETOLOGT. 203 



Gardnee, R., Jun. Protogine. Geol. Mag. dec. 2, vol. i. p. 432. 

 lleferring to a notice that a fragment of protogine contains plant- 

 remains, the writer asks if the rock in question may not be a sedimen- 

 tary rock formed from protogine. W. T. 

 Gentk, F. a. Investigation of Iron Ores and Limestones from 

 Messrs. Lyon Short & Co.'s Iron-Ore Banks on Spruce Creek, 

 Half-Moon linn and Warrior's l^Iark Run, in Centre, Blair and 

 Huntingdon Counties, Pa. Proc. Amer. Phil. Soc. vol. xiv. no. 92, 

 pp. 84-99. 

 Seems to be an interpolation in Prof. Lesley's paper (see p. 122). 

 Consists of about 30 chemical analyses. 



Guii^Lius, Otto. Om kalkgranit i Upland. [Calcareous granite in 



Upland.] Geol. foren, Stock. Eorhandl. bdt. i. pp. 47, 48. 

 Note with table. 



GtJMBEL, Dr. C. AY. Die durch ein Eruptivgcstein vercokte Kohle 

 von Mahrisch-Ostrau. [The coal of Mahrisch-Ostrau, converted 

 into coke by an eruptive rock.] Yerh. k.-k. geol. Ileichs. pp. 

 55, 5Q, 

 Describes the metamorphism of a bed of coal by an eruptive mass of 

 augitic porphyry, which is itself greatly altered near the line of 

 contact. H. A. N. 

 GuYEEDET, — . Note suT quclqucs Roches du bassin de la Loire, 

 recueillies principalement dans la partie comprise entre Roanne, 

 Saint-Just-en-Chevalet et Boon. [On rocks of the basin of the 

 Loire, from specimens gathered principally between Roanne, St. 

 Just-en -Chevalet and Been.] Bull. Soc. Geol. France, 3 ser. t, i. 

 pp. 497- . 

 The rocks described are : — greenish -brown Porphyritic Grit from Le 

 More, near Cordelles, and green ditto from Lay ; Pink quartziferous 

 Porphyry from the banks of the Loire; Amygdaloid " Wacke" from La 

 Tessone (analj'sis given) ; Reddish-brown felspathic Porphyry of Ville- 

 montais ; Granitoid,Porphyry of St. Just-en-Chevalet (analysis) ; Brown 

 felspathic Porphyry of the same place ; Pink quartziferous Porphyry 

 from La Bombardi ; Dioritine (green) of same place (analj-sis) ; Por- 

 phyroidal Eurite from same place (analysis) ; Granitoid Porphyry of Mt. 

 Urfe ; Porphyroidal Amphibolite of La Forge ; Granitoid Porphyry of 

 Boen-sur-Lignon (analysis) ; Red quartziferous Porphyry of Saint-Ger- 

 raain-Laval ; Pink quartziferous Porphyry from La Prugne. G. A. L. 

 . Sur la correlation des phcnomenes qui ont amend la trans- 

 formation des sables eruptifs et de ceux qui ont produit la trans- 

 formation do certains calcaires en dolomie dans les formations 

 cretacces ct tertiaires. [Correlation of the phenomena which 

 have brought about the transformation of eruptive sands with 

 those which have produced the alteration of certain limestones 

 into dolomite in the Cretaceous and Tertiary formations.] Compt. 

 Rend. 2 scss. Assoc. Frangaise, pp. 438-443. 

 A chemico-petrological paper. 



