The Eruptions of La Soufriere 



455 



P..O, 0.17 



so 3 0.24 



Cl None, or faint trace 



S (036)* 



NiO hone 



M11O 021 



HaO Trace 



SrO None 



Li 2 Faint trace 



Fe,S 8 (?) 0.91 



99.67 



The September eruptions, though 

 more violent than those of May, de- 

 posited less fine dust on St Vincent, 

 according to the newspaper reports and 

 private letters received from Mr T. Mac- 

 Gregor MacDonald and Mr W. J. Dur- 

 rant, druggist, of Kingstown. Samples 

 of the material ejected by the outburst 



included in Fe 7 S s (?). 



of September 3 have been received from 

 both gentlemen. The material consists 

 of fine and coarse, gritty volcanic sand 

 and gravel, apparently for the most part 

 comminuted ancient lavas of the vol- 

 cano. The fragments from 3 to 15 

 millimeters across show the coarsely 

 crystalline structure of the old lavas, 

 and many of them show that they are 

 parts of weathered masses. Olivine, 

 pyrite (pyrrhotite ?) and porphyritic 

 crystals of feldspar, hypersthene, and 

 hornblende are observable in these frag- 

 ments. The separated minerals make 

 up a large proportion of the particles 

 about 2 millimeters across. A compara- 

 tively large fragment (20 mm. in di- 

 ameter) shows phenocrysts of feldspar 

 imbedded in dark-brown and light-brown 

 scoriaceous volcanic glass which appar- 



La Soufriere. Mud Coating Upper Portion of the Cone 



From a photograph taken by Dr. E. O. Hovey, May 31, 1902, at an elevation of 1,500 feet 



above tide 



