BULL. GEOL. SOC. AM. 



VOL. 28, 1916, PL. 31 



Figure 1. — Koolau Gap^ on the Summit of Haleakala^ East Maui 



This view is taken looliing from Wtiite Hill over the lava flows which fill this portion of the 

 summit rent and which extend over the edge of the gap toward the sea. The gap is three miles wide 

 and the black lava flows are 1,300 feet below the camera. 



Figure 2. — Fault-lixe Scarp bounding the north Side of Molokai 

 Looking from Wailau gulch toward Kalaupapa leper colony. The peak is about 2,000 feet high 

 VOLCANIC PHENOMENA IN THE HAWAIIAN IST.AJJ^ns 



