Fig. 13. 



Fig. 13. Oct. 5, 1916, 12 noon. Telephotographs of travelling fountains 

 in N. cove, from N. rim of Halemauman, looking down. Depression 283 

 ft. (86 m.). Fountains migrating from left to right, conflicting currents 

 meeting and crusts foundering along conflict line. Large Dallmeyer lens, 

 aperture F 5, exposure 1/20 sec, red filter Wratten F. Photos Jaggar. 



(a) Skins downfolding, line of fountains, crusts drawn to explosion center. 



ib) Second stage, fountains have moved to right and enlarged. Crusts 

 forming behind them. 



(e) Last stage, fountains expending themselves against bank, chieflj' in 

 one great explosion center. 



