356 
PACIFIC SCIENCE, Vol. XIX, July 1965 
+ 2-6Q 
KAUAI, HAWAII 
U.S.G.S. 1910 SURVEY 
Fig. 2. Bouguer anomaly map of Kauai, Hawaii, showing station values based on 2.3 density. No topo- 
graphic corrections have been included. 
IMPLICATIONS OF THE BOUGUER 
ANOMALY MAP ( FIG. 2 ) 
Gravity work by Woollard ( 1951 ) on Oahu 
and by Krivoy and Eaton (1961) at Kilauea 
clearly indicates that Hawaiian volcanoes dis- 
play distinctive Bouguer gravity highs which 
appear to be associated with their centers of 
volcanism. Work by Kinoshita et al. (1963) 
upon Kohala, Mauna Kea, and Mauna Loa on 
the island of Hawaii bears out the earlier indi- 
cations; and unpublished studies by Krivoy and 
Kinoshita show diagnostic highs for Mauna Loa 
on Molokai, for Palawai Basin on Lanai, and 
for Haleakala on Maui. 
Local Bouguer anomaly highs of approxi- 
mately 70 mgal are centered on currently active 
Hawaiian volcanoes. In the cases listed above 
for Oahu, Hawaii, Maui, Lanai, and Molokai, 
the Bouguer highs coincide with major centers 
of volcanism, as revealed by topographic and 
geologic evidence. In two interesting examples, 
Koolau on Oahu and Kohala on Hawaii, the 
Bouguer high is displaced from the topographic 
high. At Koolau erosion and/or faulting have 
removed the original topographic high over the 
central volcanic complex, the highest remaining 
portion of the shield being its southwestern 
flank. The Bouguer high is centered on the 
eroded, low-lying dike complex. At Kohala the 
Bouguer high is displaced southeastward from 
the present summit. Possibly it reveals the dense 
central part of an ancestral Kohala shield that 
was buried by flows from the younger Mauna 
Kea volcano. 
On the island of Hawaii (Kinoshita et al., 
1963), terrain corrections were computed out 
to zone N ( Hayford-Bowie ) . They provided 
large corrections — as much as 50 mgal— for 
