52 



C. H. HITCHCOCK — VOLCANIC PHENOMENA ON HAWAII 



existence of such a Tertiaiy base is yet to be proved for Hawaii except 

 in a theoretical wa3^ 



The surface of this dome is covered by a multitude of lava streams — 

 irregular, straggling, inky rivers — which are well seen from Mauna Kea, 



Figure 1. — Map of Hawaii 



and which reticulate on the side of the mountain. The entire mass has. 

 been built up by these streams, issuing at irregular intervals from orifices 

 and crevices. It would require millions of years at the known rate of 

 increase for the present century to construct this dome. Though so 

 modern, the surface is unbroken by denudation in its upper portions. 



