METEORITES OF NORTH AMERICA. 397 



BIBLIOGRAPHY. 



1. 1902: FARRINGTON. A new meteorite from Kansas. Science, n. s., vol. 16, pp. 67-68. 



2. 1903: FARRDJOTON. An occurrence of free phosphorus in the Saline township meteorite. Amer. Journ. ScL, 4th 



ser., vol. 15, pp. 71-72. 



3. 1904: KLEIN. Berlin Sammlung. Sitzber. Berlin Akad., p. 147. 



4. 1907: FARKINGTOJJ. Meteorite Studies II, Publ. Field Columbian Mus., Geol. Ser., vol. 3, pp. 126-128. 



Saltillo. See Coahuila. 



SALT LAKE CITY. 



Between Echo and Salt Lake City, Utah. 

 Latitude 40 48' N., longitude 111 36' W. 

 Stone. Brecciated gray chondrite (Cgb) of Brezina. 

 Found, 1869; described 1886. 

 Weight, 875 grama (2 Ibs). 



This meteorite was described by Dana and Penfield l as follows : 



In the summer of 1869 this meteoric stone now described was found by Mr. Clarence King in Utah, on the open 

 prairie between Salt Lake City and Echo. It was given by Mr. King to Professor Brush and he presented it to the 

 Yale College collection. 



Nothing is known in regard to the circumstances or time of its fall ; in that dry climate it may well have lain exposed 

 on the surface of the ground for a long time without disintegration, especially as it was well protected by its crust. 



Its weight is 875 grams; it is oblong in shape, about 12 cm. long, and 9 cm. in its greatest width; one edge is sharp 

 and wedgelike, and one end is relatively sharp, the other rounded. The surface is comparatively smooth and shows 

 only a few broad and shallow pittings. A uniform crust, smooth, except for minute angular elevations on certain 

 portions and not very thick, covers it almost completely. The color of the crust is reddish black, in consequence of the 

 partial rusting of the fused material. A small portion of the mass has been broken from one end to give material for 

 study. 



The interior of the stone is of a dark bluish-gray color, distinctly mottled by its chondritic character, and showing 

 a rather large proportion of iron irregularly distributed through it, with minute patches of troilite. The small portions 

 of the interior of the stone which had been exposed are much stained by the oxidation of iron, but this change has 

 penetrated comparatively little into the mass, and the stone as a whole is exceptionally hard and firm. 



The nature of the mineral substance which, together with the metallic parts, makes up the mass can be only imper- 

 fectly made out by mere microscopic examination; thin sections, however, under the microscope show this very satis- 

 factorily. The olivine is the most prominent constituent. This appears frequently in spherules or "chondrules" of 

 the size of very small shot ; these are made up of a multitude of individual grains having a distinct rounded outline and 

 each with its own optical orientation. These granular chondrules are sometimes inclosed by an iron border, and as the 

 grains of olivine are fresh and clear and give brilliant polarization colors they form very beautiful objects under the 

 microscope. The separate grains in these cases are closely packed together, but sometimes show a little intermediate 

 glassy matter. The olivine also appears in relatively large fragments, much fractured, but showing by the common 

 optical orientation that all belongs to a single individual. Still again the olivine is seen in chondri which have a distinct 

 coarsely fibrous structure in consequence of the inclusions of dark-colored glass. 



The bronzite (enstatite) appears in irregular crystal fragments scattered through the mass; also in chondri with 

 fine fibrous structure usually eccentric. These have sharp angular outlines in many cases and appear to be but frag- 

 ments of the original spherules; in this as in some other respects the stone has a marked brecciated character. To the 

 bronzite also are to be referred occasional large spherules having a coarsely fibrous or columnar structure.the fibers lying 

 in several directions within the limits of the same individual. 



Plagioclase feldspar seems to be present in crystalline fragments, showing distinct, though not sharp, twinning 

 structure. Especial interest attaches to this constituent of the stone because it shows most clearly the brecciated 

 character just alluded to. One piece, for example, has been broken transversely a number of times and then cemented 

 by the groundmass so that it still preserves in general its original outlines though made up of separate sections. This 

 feldspar is rich in black inclusions lying parallel to the twinning lines. A number of patches of an isotropic mineral, 

 which is probably to be referred to maskelynite, were also observed. 



The specific gravity of this meteorite was found to be 3.66. 



A careful chemical analysis by Penfield gave the following results. It was divided in the first place into the 

 nickeliferous iron, 17.16 per cent, and the mineral part, including the troilite and silicates, 82.84 per cent. 



The analysis of the iron yielded : 



Fe 91.32 



Ni 8.04 



Co 0.60 



Cu 0.04 



100.00 



