BULL. GEOL. SOC. AM. 



VOL. 18, 1906, PL. 64 



I''I(!1JJ!10 1. 



-ClUTER OF XlNANTEC.\TL (NEVADO UK TOI.UCA), MlC.KICO, TUOM THE I'ICO I)E 



Kkailk 



'Die dome in (lie middle was tlie last pliase of the latest eruption, and is analogous to- 

 tlie dome of mount I'elee, JIartinique. It is composed of glassy andesite that welled 

 up from the conduit, but did not form a flow. 



FlUUKE 2. VOLCA.\ DE CoHMAj ME.MCU, AUUUST oO, UJUU 



.\t left the parasitic cone formed in 1SC9 ; at right the lava stream of 18S."i, siirmounti'd 

 by that of ]!)0:',. Courtesy of the Am. Mus. of'Nat. Hist. E. O. Ilovey, photographer 



CRATER OF XINANTECATL AND COLLMA VOLCANO 



