w 



LOW 

 400 Km PASS 

 FILTER 



A 



150 Km 

 FILTER 



B 



MIGHT 

 PASSL 



Lowr 



PASSL 



HIGHr 

 PASSL 



GRAVITY EFFECT 

 FREE-AIR GRAVITY 



GRAVITY EFFECT 

 FREE-AIR GRAVITY 



GRAVITY EFFECT 



FREE-AIR GRAVITY 



GRAVITY EFFECT 

 FREE-AIR GRAVITY 



ABC D 

 t600 t 1200 



c 



D 



GRAVITY EFFECT OF 

 TOPOGRAPHY 



FREE-AIR GRAVITY 

 TOPOGRAPHY 



KM 



300 600 

 —I 1 



ANTILLES 



Figure 5. West-east profiles through the Lesser Antilles. For description of curves, 

 see Figure 4. Even in this area of large subbottom density inhomogeneities 

 gravity anomalies with wavelengths up to a few hundred kilometers can be 

 predicted from topography. This relationship between gravity and topography 

 enables us to interpolate free-air anomalies between two neighboring profiles 

 if depth values are known between the two profiles. 



23-10 



