GEOLOGY. 



The following is a list of the collection of minerals from Kerguelen 

 Island, determined by Dr. F. M. Endlich, geologist to the Smithsonian 

 Institution : 



Smithsonian No. 



9376. Basalt; containing decomposed olivine and small white crys- 



tals of c/ta6<i2;i;te. 



9377. Basaltic rock. 



9378. Basaltic rock decomposed. The red color is due to the pres- 



ence of ferric sesquioxide. 



9379. Basaltic rock decomposed. Stained by ferric sesquioxide. 



9380. Basaltic rock decomposed. Stained by ferric sesquioxide. 



9381. Basaltic rock, very compact. 



9382. Basalt ; containing small white crystals of chahazite in vesi- 



cles. 



9383. Basalt, vesicular, with small crystals of chahazite and dark 



brown olivine. The red color of the portions exposed to 

 atmospheric influences is due to decomposing magnetite. 

 It contains also some augite in small particles. 



9384. Basalt, slightly vesicular, containing augite, yellow olivine, 



and chahazite. 



9385. Basalt with olivine. 



9386. Basalt with large geodes of olivine — typical olivine color. 



9387. Vesicular basalt, the vesicles being drawn out during the 



flow before rigidity of the material had occurred. 



9388. Chahazite in basalt. 



9389. Basalt coated with carbonate of lime, the result of the de- 



comiiosition of its constituent minerals. 



9390. Basalt with amygdules of calcite and crystals of chahazite 



and augite. 

 3 k 33 



