ON METEOKIC lEONS FROM ALPINE, BREWSTER 

 COUNTY, TEXAS, AND SIGNAL MOUNTAIN, LOWER 

 CALIFORNIA, AND A PALLASITE FROM COLD BAY, 

 ALASKA. 



By George P. Mekrill, 

 Head Curator of Geology, United States National Museum. 



ALPINE, BREWSTER COUNTY, TEXAS. 

 (Cat. No. 513, U.S.N.M.) 



The iron described below was received in 1915 from a Mr. E. M. 

 Flynn, of Alpine, Texas, who reported having found it in the Chico 

 Mountains in the southwestern part of Brewster County. Cor- 

 respondence held with the view of securing the entire mass resulted 

 in failure, and I have not been able to learn of its ultimate disposi- 

 tion. The weight of the original mass was given as about two tons ; 

 the fragment received was in form of a solid triangular mass weigh- 

 ing 212 grams. One face showed a broken surface, since polished 

 and etched (see fig. 2, pi. 1), the others the usual slightly oxidized 

 surface. As shown in the illustration, this is a finely and evenly 

 granular iron, the uniformity of texture of which is broken only by 

 three irregularly double, wavy bands of dark spots a half millimeter 

 or so in diameter, which, on a reflected surface seem each to be sur- 

 rounded by a narrow border or halo of lustrous material. The spots 

 do not, however, differ structurally from the surrounding iron, into 

 which they merge gradually. Their color suggests that they may be 

 due to finely disseminated carbon. They do not oxidize in the process 

 of etching with nitric acid as would be the case if they were troilite. 

 Except for the presence of these spots, the iron resembles the most 

 granular portions of that of Forsyth County, North Carolina. I 

 find no evidences of cleavage or Neuman lines, and except for the 

 spots the mass is apparently homogeneous. 

 Analysis by Dr. J. E. Whitfield yielded : p^^. ^^^^ 



Silicon 0. 015 



Sulphur 0. 012 



Phosphorus 0. 328 



Manganese none. 



Nickel,^ 5. 620 



Cobalt ■ 0.430 



Copper 0. 016 



Iron 93.600 



Carbon 0. 008 



Total 100. 029 



No. 2425— Proceedings U. S. National Museum, Vol. 61, Art. 4. 



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