A HISTORY OF NORFOLK 



The strata or formations known in Norfolk may be grouped as 

 follows, the names in italics referring to those not exposed at the 

 surface : — 



The superficial extent of the various formations is depicted on the 

 accompanying map. 



At present no borings in Norfolk have penetrated the Jurassic 

 rocks. The deep boring at Norwich (see p. 7) touched the Gault, 



