THE METEORIC BASALTS. — GABBEO. 197 



31dsswg, Bavaria. 



The Massing meteorite is said by Professor C. W. Giimbel to be of a grayish-white 

 color in tlie interior, and to contain olivine in yellowish-green to ulear-green, round, and 

 irregular grains, which sometimes show parallel fissuring. 



He refers to feldspar a white, glassy, transparent, or dusty, cloudy, strongly-fissured, 

 rarely parallel-striped, evidently cleavable mineral. A wdne-yellow to grayish-green, or 

 pale, reddish-brown glassy mineral is regarded as belonging to the aogite group. It is not 

 dichroic, and is sometimes in long fibrous forms, and filled with numerous little bubbles. 

 Besides these, chromite, pyrrhotite, and iron were found. All these are cemented by a fine, 

 dust-like, granular, gray grouudmass.* 



Tschermak states that the Massing meteorite is similar in character to that fronr 

 Luotolaks, and contains anorthite, brownish, yellowish, and greenish-gray augite, brouzite, 

 chromite, pyrrhotite, and greenish splinters of olivine. f 



Juveims, Anlechc, France. 



According to Eainmelsberg, this meteorite is composed of anorthite, augite, chromite, 

 pyrrliotite, and possibly a little apatite, and titanite. It is similar to the Stannern form, 

 but coarser.J Eose states that the nickeliferous iron is in a verj' minute quantity. § 



The specimen in the Harvard College Cabinet looks macroscopically more like a 

 gabbro thau the Stannern form, and it has a coarser texture. 



This meteorite is figured by Fouque and Levy, as being composed of anorthite, enstatite, 

 augite, and magnetite,|| and having a structure like some norites. 



Tschermak states that it shows a crystalline to tufaceous structure under the micro- 

 scope, and is evidently of a brecciated character. 



The anortliite in it is well-crystallized, part being water-clear, and part cloudy and 

 ■white, owing to rounded and fine needle-formed glass and other inclusions arranged 

 parallel to the bounding planes. The crystals often show in polarized light a compli- 

 cated twinning. Some of the inclusions hold bubbles and black grains. Earely gas- 

 pores were seen. 



The augite is brownish-bluck, owing to numerous black, and rarely brown, needle- 

 shaped and rounded inclusions. The brownish rounded inclusions are regarded as glass. 

 Some irregular grains of a pale-brown color are referred to diallage. A jiale-brownish 

 silicate, sometimes having a fine lamellar structure was observed. Small amounts of 

 pyrrhotite and nickeliferous iron were also found by Tschermak.lT 



Slier gotty, India. 



A description of the microscopic characters of tlie Shergotty meteorite was given by 

 Professor Tschermak. in 1872. The stone is granular, with the grains nearly of the 

 same size, and on the fractured surface it has a yellowish-gray color. In the thin section 

 five different minerals were recognized : 1, a brownish cleavable mineral similar to augite ; 

 2, a glass-clear isotropic mineral ; 3, a yellowish, anisotropic mineral, very rare ; 4, an 

 opaque black mineral — magnetite; 5, an opaque metallic yellow mineral, extremely rare. 



* Sitz. Miinoheii Akad., 1878, viii. 32-40. f Die mikros. Bescli. der Meteoriten, 1S83, i. 8. 



+ Aim. PliYsik Cliemie, 1848, Ixxiii. 58.5-590 ; 1851, Ixxxiii. 501-593. 



§ Alih. Berlin. Akad. 1863, pp. 126-13-1.. |] Miu. Microg., 1879, plate LV. figure 1. 



^ Die mikros. Besch. der Meteoriteu, 18S3, i. 6, 7; Miu. Mitth., 1874, pp. 169, 170. 



