lr ek eee ee Gr A ae ~ “tt. 
1884.] Mineralogy. 114! 
by M. de Lacvivier on his admission as doctor of the -faculty of 
sciences, upon the Cretaceous beds of l’Ariége, is the result of 
many years of labor. The strata below the Cretaceous are not 
neglected. The writer describes new and interesting Devonian 
beds which he has discovered, chiefly marbles with remains of 
Goniatites. The Carboniferous is absent in the department, but 
the Trias and Jurassic are present, and to the latter must be re- 
rred a mass of dolomites and marbles which were previously 
believed to be Palaeozoic, but which contain’ Jurassic fossils. The 
uneven surface of the Jurassic beds is filled by a ferruginous de- 
posit (bauxite) forming the base of the Urgonian, which is suc- 
ceeded by the Gault. Many new fossils are described from the 
Urgonian, and the Gault is highly fossiliferous. The Upper Cre- 
taceous (Cenomanian, Turonian, Senonian) is completely uncom- 
formable with the Lower. Some pieces of pumice, thought 
to have come from Krakatoa, have been picked up at Mayotte, 
off the north-west coast of Madagascar. 
Tertiary —M. E. van den Brock has discovered fragments of 
Scandinavian rocks in the Post-tertiary deposits of Belgium. The 
only known piece large enough to be called an erratic block is of 
granite, measures 0.8 x 0.5 4 0.6 meters, and is imbedded in 
ina. . 
Lorenzen (Zeit. der Deut. geol. Gesell., 1883) after a study of the 
so-called meteoric masses of iron in Greenland, conclude that 
Masses are telluric, and that the presence of nickel can no 
More be considered as an infallible evidence of meteoric origin: 
MINERALOGY: 
New Minerats.—Rinfite (Lorenzen)—Joh. Lorenzen, of Co- 
en, has given this sae toa si mineral from Kangerdly- 
nh in Greenland, in honor of Dr. Rink, recently director O 
= Danish Explorations in Greenland. ‘ a : 
À occurs in crystals with arfvedsonite, ægirite, eudialite, steen 
strupite, lithia mica, etc. : ge 
Monoclinic. Color golden-brown. Translucent in thin = 
Hay rhen unaltered; straw-yellow and earthy when altered. 
Tdness 5. Specific gravity 3.46. 
‘Edited by Professor H. CARVILL Lewis, Academy of Natural Sciences, Phils. 
Leitsch, Sir Kryst., 1864, 1X, p. 248. 
