EtmoPE. 85 



Laspeyres, H. [Age of the Ehine Yalley, etc.] Zeifsch. deutsch. 

 geol. Ges. Bd. xxviii. Heft 2, pp. 397-404 ; woodcut (section). 



Quotes from a former essay passages in favour of Lepsius's view, 

 that the Rhine valley was not formed at the date assigned by Elie de 

 Beaumont, but is post-Jurassic and perhaps Oligocene in date. Main- 

 tains that there is no discordance between the Vosges sandstone and 

 the U. Bunter ; the method of Platz, of taking altitudes and curves of 

 strike, being too rigorous, and that a discordance not appreciable by 

 a clinometer cannot be the proof of a great movement. E. B. T. 



Lassen, T. Om Nikkelmalmen paa Ringeriget. [Nickel-ore at Rin- 

 geriget, Norway.] Nyt Mag. Nat. Bd. xxi. pp. 271-278. 



The rocks of the district consist chiefly of hornblende-, mica-, and 

 quartz-schist. The richest ore ia at the Erteli mines, in which mag- 

 netic iron-pyrito with about 3 p. c. of nickel (and cobalt) is worked. 

 The ore is at the junction of gabbro and quartz-schist. It seems to bo 

 a rule that magnetic iron-pyrite rich in nickel is almost only found in 

 the neighbourhood of gabbro, and that the ore is of the greatest value in 

 places where gabbro and quartzite are in contact. A plan of the mines 

 is given, and lists of associated minerals and of localities. E. E. & H. M. 



Laube, G. Notiz Uber Braunkohlenvorkommen im * Erzgebirge. 

 [Brown Coal in the Erzgebirge.] Verh. Tc.-h. geol. Heichs. pp. 

 329, 330. 



Lebour, G. A. The Carrara Marbles. Geol. Mag. dec. 2, vol. iii. 



pp. 289-292. 

 History of opinions as to the age of the marbles, which have been 

 regarded as Igneous, Cretaceous, Jurassic, Liassic, Triassic, and finally 

 Carboniferous, as seen in 1845 by Coquand, whose views, based on 

 stratigraphical evidence, were disregarded till lately, when they were 

 proved correct by the discovery of fossils, of which a list is given. 



W. H. D. 



— — . On the Geological Relations of the Secondary Iron-ores of 

 France. Trans. N. Engl. Inst. Eng. vol. xxv. pp. 59-78, pis. 

 xxix., XXX. 

 Describes the chief horizons of iron-ore and the distribution, under 

 the heads — Cretaceous, Jurassic, Triassic, and ores of doubtful age. 

 Gives a detailed table of formations in which the iron-bearing divisions 

 are noted, and selected analyses of ores. The plates give a map, show- 

 ing roughly the outcrop of the ore-yielding Secondaries, and sections. 



G. A. L. 



. Geological Maps of France. Geogr. Mag. vol. iii. pp. 47, 48. 



Gives an account of the progress of topographical geology in France 

 from 16G4, and a list of departmental geological maps, &c. 



