26 MIDDLE ALBIAN STRATIGRAPHY 



Sample S3 1 ft 6 ins below the top of Division 4 ; 



subdelaruei Subzone not niobe as recorded. 

 Sample S4 6 ft below the top of Division 5 ; 



subdelaruei Subzone not niobe as recorded. 

 Sample S5 4 ft below the top of Division 5 ; 



subdelaruei Subzone. 

 Sample S6 2 ft below the top of Division 5 ; 



■meandrinus Subzone. 

 Sample S7 2 ins below the top of Division 5 ; 



nitidus Subzone not subdelaruei Subzone as recorded. 

 Sample S8 ' lautus-Zone nodule bed ' Division 6 ; 



cristatum Subzone. 



(b) St. John's Brickyard 



The brickpit owned by Durtnell and known in the literature as St. John's Brick- 

 yard, or the 'Bat & Ball ' pit, is now overgrown. It was situated about 900 yards 

 NNW. of the Bat & Ball railway station, 100 yds W. of Otford Road, Otford (TQ 

 52805755), and 900 yds towards the WSW. of the Greatness pit. The section was 

 first described by Hill (in Jukes-Browne 1900 ; 85) and additional information was 

 given by H. J. W. Browne (1924) and by Spath (e.g. 1925 ; pi. XII, fig. 4). It 

 showed a sequence (text-fig. 3) intermediate in thickness between that of the Great- 

 ness pit and the Dunton Green section described next. 



(c) Dunton Green 



The Dunton Green Brick, Tile and Pottery Works Ltd pit was situated about 1650 

 yds WSW. from the St. John's Brickyards. The section is now obliterated. It was 

 first described in detail surprisingly late in its history by C. W. Wright (1947 ; 315-318) 

 although it had been mentioned in the literature as early as 1880 (Lobley 1880). 

 Spath recorded ammonites from it (1923-43) and Khan (1952) and I (1958) have 

 referred to it briefly. Unfortunately, I saw only the sequence up to the basal part 

 of Division 4, and the dotted portion in text-fig. 10 is taken from the account by 

 Wright. 



Text-fig. 3 shows the extent to which the sequence is attenuated in comparison 

 with that at Greatness to the ENE. and the Brasted borehole to the WSW. (not ESE. 

 as given in Casey 1954 ; 266) discussed below. 



The exposed portion of Division 1 at Dunton Green was seen to be identical to the 

 corresponding portion of Division 1 at Greatness. Division 2 contains the same 

 fauna as at Greatness but the phosphatised material is devoid of the shell. Division 3 

 (i) contains 'solid ' pyritised Hoplites (H.) with the nacreous shell, including H. (H.) 

 dentatus densicostata Spath and H. (H.) escragnollensis Spath. This bed corresponds 

 to 3 (i) at Greatness. The basal 2 feet 3 inches (o-686 m.) of 3 (ii) at Dunton Green 

 consists of a glauconitic clay, immediately above which Anahoplites intermedius 

 appears in the sequence and ranges up through the remainder of the Division. 

 Although the sequence is much more condensed, the thin bed of phosphatised body 



