PLATE Ap. 1. 
INDEX 
OxFord Clay 
Cornbrash 
j--j G reot Oohte 
[ Estuanne Beds 
C ; ^ • \ \f^orthamptonshire 
I Iron-ore 
Upper Lias 
9 + 3 ! 
/Magnetic Observation Station 
nth the relative disturbing Forces 
M A P OF THE 
IRTHLINGBOROUGH DISTRICT 
NORTHAMPTONSHIRE 
illuslrale ll't* relations between Geological Structure and Magnetic Disturbance 
by A.Hubert Cox,M.Sc..PKD..F.G.S..and G.W.Walker. M.A.AR.CSc.. RRS. 
( Geology based on the Map of the Geological Survey ) 
Scale 1 inch I Mile 
». eii‘i 
