Geologic Implications of Magnetic Surveys — Malahoff and Woollard 
279 
B B' 
total force water 
Fig. 6. Magnetic profile along line B-B' (see Fig. 4) north of the island of Maui. 
sociated with the Molokai Fracture Zone, occur 
as elongated parallel bands. It is also noted that 
the magnetic anomalies observed along the 
bathymetric expression of the Molokai Fracture 
Zone have a distinctive high amplitude. Be- 
cause the topographic effect of the associated 
bathymetry cannot alone explain the anomalies, 
there must be associated intrusive rocks having 
a high magnetic susceptibility. Although it is not 
known whether these actually crop out, a depth 
analysis of the anomalies suggests that they do 
not, and that relations are similar to those de- 
fined seismically and magnetically north of 
Maui. In other words, it appears that the anoma- 
lies are caused by intrusions into crustal fractures 
developed by lateral faulting. Therefore, it is 
not surprising that, although the bathymetric 
expression of the Molokai Fracture Zone ceases 
