BULL. GEOL. SOC. AM. 



VOL. 25, 1913, PL. 23 



Figure 1. — Pillow Lava 



Sliowiug the bulbous budding process of development. Compare plate IS, flgure 2, and plate 

 19, figure 1. Crater of Kilauea, Hawaii. Photograpli by the Geophysical Laboratory 



Figure 2. — Ordinary Pahoiohoe (in the distange) and 1'illow Lava giiilled ry Sea- water 



(in the eokkckoiind) 



Lava of 1909, volcano of Matavanu. Savaii, Samoan Islands. Photograph by the late Dr. 

 Tempest Anderson. Quarterly Journal of the Geological Society, volume Ixvi, 1010, plate Hi 



PILLOW LAVA 



