3Q 



MIDDLE ALBIAN STRATIGRAPHY 



Dlv. 



& 



Bed 



Li thology 



14 



10 



(vilO Mottled blue-grey-fawn clay with crushed Ineceromus 



conctniriius and Hopli tts (H.) spp. with the shell. Seen to 



(vli) Blackish phosphatic nodules mainly casts of Hoptilts CWJwith^\ 

 portions of shell s preserved, in shelly mottled clay. 



(vl) Clay as in 2(vlli)with partly phosphatised HoplHes (H.) 



(v) Clay as in 2 fl/lii) but much less fossiliferous. 



(iv) Shelly grey-blue-fawn clay with part-phosphatised part 

 pyritised Hopliles (H.) 



(Hi) l.concenlricus shell seam with part-phosphatised fossils. J* 



(il) Shelly mottled blue-grey clay with crushed fossils. ^ * 



(I) Dense seam of small phosphotic nodules and phosphatised fossils !* 



(v) Mottled blue-grey-fawn clay with lenticles of ferruginous marl 



(iv) Clay as in 1 (v) but without phosphatic nodules, and with 

 pockets of glauconitic quartz sand, and ferruginous 

 lenticles. Crushed part-phosphatised Hopliies (H.) occur 

 without the shell. 



(iii) Darker grey clay with ferruginous lenticles with 

 indigenous part-phosphatised Hoptites IH.). 



(ii) Lighter grey clay with many ferruginous lenticles. 

 Small phosphotic pieces with Hoplilts (H.). 



(i) Dark grey shaly mottled clay with reddish ferruginous 

 lenticles. 



Dark grey gritty clay. 



Highly pyritic dark grey clay with greyish septarian phosphatic 

 nodules pnd .part-phosphatised .fossils with.pynte replaced shells 

 wealhermg fh ferruginous nchrenm lent i r-le*. „-»■" 



Dark grey pyritic clay, gritty, and weathering ferruginous. 



Dark qrey highly pyritic clay with septarian phosphatic nodules 

 " \ weathering ferruginous./ 

 Dark gritty grey clay with scattered septarian phosphatic nodules 



Seam of large spherical blackish phosphatic nodules in glauconiticlobrr 



Black gritty blocky weathering clay with glauconite. When 

 weathered clay partings are coated with pyrite decompos- 

 ition products. 



Bed 12 of Casey 1961a; 543 puiosianus Subzone 



»+•-****. 



E> 





Ft Ins M. 

 9- 



1 11 



6- 



3- 



4-5 



7 



Fig. 12. Middle Albian sediments at the Squerryes Estates Sand Pits' pit, c. 150 yds N. of 

 Covers Farm, Westerham, Kent (TQ 43305395). 



