NATURE OF LAVA 



239 



ju>t as rum-it to say that the ire is di>solvi-d. Tin- two mint-nils, ice and silt, 

 an- div-olvi-d in each other, and tht- solution takes place at a temperature below 



Fig. 23 1 . Relat ively smooth lava surface near the Jordan craters, Malheur Co. , 

 Ore. (U. S. Geol. Surv.) 



Fig. 232. Ropy surface of lava, Mauna Loa, llo\v of 1881. (Calvin.) 



