SEAFLOOR MAGNETIC ANOMALIES

 

MAGNETIC ANOMALIES - DEVIATIONS OF THE MAGNETIC FIELD FROM THE EARTH'S PRESENT FIELD - OCCUR ON THE SEA FLOOR

AND ARE MEASURED BY SHIPS TOWING SENSITIVE MAGNETOMETERS (ORIGINALLY DEVELOPED TO SEARCH FOR SUBMARINES)

(Press & Siever)

THESE ANOMALIES FORM SYMMETRIC NEGATIVE AND POSITIVE MAGNETIC STRIPES ABOUT MIDOCEAN RIDGES