24 



MIDDLE ALBIAN STRATIGRAPHY 



^ -e> fQwn">f) SjOJj with g 



\"y phosph 



>gy 



ng seml-derlved and Indigenous fossils*" 



Zone nodule bed') 



Ion lies 

 ottled clay with ye 

 t-phpsphctised 



t phospnotic nodules 



us balls alter pyrlti 



1 port-pMospno 



' ochreous balls afterpyrite, i 



(j ii > Mottled blue-grey ond 



iiU_Perjls_tbnt laarr. of scattered p 



phosphotic nodula 



h cloy 



;loy of 5<li1T 



t-phospha 1 1 jsd 



(I) Mottled blue-qrey and fownlsh clay becoming more fawn-grey towards the 

 base which Is morked by small lenticular developments of highly ferruginous 

 marly clay. Impersistont shell seams occur throughout. 



(ill) Dork slightly brown. sh-grey clay. 



(ll)Seam of scattered dork brown phosphotic nodules 



(i)Broad banded clays; 

 with lenticular d«v< 

 lower band which v. 



ing dark-grey clay and lighter grey marly. 

 Of ferruginous marlstone especially in the 

 veen tO and tB inches in thickness. 



nodules with i 



(v)Dork grey shelly clay. 



(iv)Seam of shel is w 

 body chambers. 



II buff phosphatic 



ond phosphotised i 



(no DarK grey shel I y clay 

 phosphat ic nodules. 



grey bonds alternating; scottered butt 



(il)Greenlsh glauconltlc clay. 



(I ) Dork grey shelly 



Dense seam of black phosphotic 

 shel I, in dork grey she 1 1 y c lay 



odules ond casts of ammonites, often with the 



(vOShelly dark grey cloy with port phospatlsed fo 



i shell seam 10 inche 



tv) Shelly seam with phosphotic nodules and fossils. 



(Iv)Oork grey shelly clay. 



tlll)Shell seam with phosphatic nodules 



(Ii) Dark grey shelly clay. 



(i)Dork grey sparsely fosslllfe 

 with patches of glauconite 



ay becoming 

 owest part e 



nzn> 



Ft ins M 



2-6 

 3 

 I 13— 



Fig. q. Lower Gault section at the Sevenoaks Brick Works Ltd's pit, 1300 yds NNE. of 

 Bat & Ball railway station, 150 yds S. of the Otford-Kemsing railway line, and 150 yds W. 

 of Greatness Lane, Otford, Kent (TQ 53605780). 



