QiKirt. Joum.GcoL. Soc. Vol . I XIX, J J (. ZHZPT 



0< ^ JBLACkWI'bV 

 ~~~^ ESTUARY 



Contour*- lines or the base of the nixtritve 

 Mesoxoic. This is identical with the Pal 

 eeoxoic floor in that part of the Tiiap 

 from which Trias is absent, that, is to 

 the scu/fv eau*t rjf Calvert, . To tfte ruorth 

 west it is identical with tJce top of the 

 Tricus & net wi/Jt. Ove FaZazexo-oc floor. 



