An occurrence of saline ground water on Guadalcanal 

Guadalcanal Island is largely mountainous, but on the north side there is a coastal plain about 40 mi long which averages eight miles in width and stands a about 15 ft above sea level. This plain is composed of the coalesced deltas of several large rivers. Most of the military installations of World War II were located on this plain near its western end. Wells drilled for water supply disclosed a body of saline ground water between the Lunga and Nalimbu Rivers. The saline water probably is ocean water that was incorporated into the sediments as the coastal plain was built. The location and shape of the body of salt water appears to be controlled largely by the permeability of the material.