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J. F. KEMP — THE LEUCITE HILLS OP WYOMING. 



fly mine, Cariboo district, British Columbia.* The writer has received 

 from his friend, Professor F. C. Smith, of Rapid City, South Dakota, a 

 suite of rocks from west of Terry peak, in the Black hills, which contains 

 abundant leucites and which is now being studied for fuller description. 

 In resume, it may be said that aside from the occurrences in Ital} 7 , 

 Germany, and Bohemia, on the European mainland, leucite is known 

 on the Lipari islands. In Asia it is found in Persia, Asia Minor, and 



Figure i. — Sketch-map of the Leucite Hills and Environs. 



It is based on map n of the Survey of the Fortieth Parallel and on the Land Office maps. The 

 squares are townships, 6 miles on a side. The Leucite hills, Orenda butte, Black Rock butte, 

 Pilot butte, the Boar's tusks, and probably North Pilot butte are igneous. The other escarpments, 

 so far as known, are sedimentary strata. 



Siberia, on the mainland ; and in and near Java, of the East Indies. Off 

 the coast of Africa it is met in the Cape Verde islands and on the main- 

 land on Kilima-Njaro. It is known in one Australian locality. In 

 South America it occurs in eastern Brazil and in Argentina. In North 

 America it is known in Lower California, New Jersey, Arkansas, British 

 Columbia, and in several places outlying from the eastern Rocky moun- 

 tains. 



* Geol. Survey of Canada, vol. vii, 1896, pt. R, p. 13. 



