IN THE ANGLO-PARIS BASIN 



17 



Spath late mutation, Hamites tenuicostatus Spath, Inoceramus concentricus Parkin- 



son. 



The assemblage indicates the subdelaruei Subzone as restricted here and by the 

 writer in i960, which coincides with the term ' lower subdelaruei Subzone ' given by 

 Smart (in Smart, Bisson & Worssam 1966 ; 98). The age of the underlying clay was 

 not determinable, but the whole sequence is similar to that of the Maidstone By-Pass 

 (text-fig. 3) . Smart records cristatum Subzone fossils from a similar shallow working 

 300 yds (274 m.) to the NNW. 



In the Ashford Brickworks Ltd pit (formerly the Ashford & Naccolt Brick, Tile & 

 Potteries Ltd) situated 700 yds NW. of Sillibourne Farm and about no yds ENE. of 

 Blackwall Farm, Wye (TR 04954445) the upper beds of the Lower Gault have 

 recently been exposed (text-fig. 5). This is the pit recorded by Cornes (in Dewey 

 et al., 1925 ; 263-4) as ' New Nackholt ', and by Smart at TR 049445 (1966 ; 98). 



Bed 



LI thology 



Dense seo m of phosphatic nodules and phosphotic fragments of tossils 



(iv) Dark grey cloy shelly with part phosphatised fossils particularly in 1 

 basal inch. 



(iij) Dark grey clay with few fossils and occasional scattered phosphatic 

 nodules. 



(n) Bed of scattered brownish phosphotic nodules in dork grey cloy. 



(i) Dark gre y clay. 



seen to 











Ft 



Ins M 



E 



O 











1—i 



1-3 

 10 



■«5 







- 



W * 



C=D 



C=3 



CD CD 



— 



1 



* 5 









1 



1 



1 



3 n 



i *■ . 





Fig. 5. Upper beds of Lower Gault at Naccolt Brick Works (Ashford Brickworks Ltd), 

 700 yds NW. of Sillibourne Farm and c. noo yds ENE. of Blackwall Farm, Wye, Kent 

 (TR 04954445). 



Anahoplites daviesi and A. daviesi ornata appear at a depth of 10 inches (0-254 m 

 below bed 2, the cristatum nodule bed, and the remainder of the clay up to bed 2 is 

 classified with the daviesi Subzone. Whether the lower part of the exposed clays 

 of bed 1 is also of daviesi Subzone age is not certain. Only a single nodule bed 

 (bed 2) here represents Bed VIII at Folkestone and its character and fauna is almost 

 identical to that of Division D in the Maidstone By-Pass (Owen i960 ; 374). The 

 section recorded by Hill (in Jukes-Browne 1900 ; 84) at Kennington, the ammonites 

 from which were re-determined by Casey (in Smart et al., 1966 ; 97), apparently 

 showed some Lower Gault, but it is at present impossible to interpret the sequence. 



Unfortunately the sections recorded between Wye and Hollingbourne are in- 

 sufficient to determine the succession. The preservation of the ammonites from 

 Westwell Leacon and Kennington preserved in the Institute of Geological Sciences 

 suggests nodule beds about the same horizon as beds C (ii) and D in the Maidstone 

 By-Pass. The pit at Eyhorne Street, Hollingbourne, described by Hill (in Jukes- 

 Browne 1900 ; 85) was alleged to show beds spanning the Lower Gault-Upper Gault 

 junction. However, Casey (in Worssam et al., 1963 ; 59) has re-determined the fossils 

 collected from this pit and demonstrated that the section was wholly in the Lower 

 Gault and that Hill's reading of it was incorrect. If one compares the section given 



