part 1] GAULT AiSID LOWER GEEEIS'S Al^TD NEAR LEiaHTON. 15 



Another old pit in the same field, 100 yards farther east, was 

 being re-worked in 1903, and showed a somewhat different section 

 from the above in its northern part, where the Basement beds (3) 

 filled a hollow in the Sands. The section is now obscured, except 

 iit one place, Avhere a small re-excavation, made recently for 

 Dr. Kitchin & Mr. Pringle, shows the following succession. 

 I understand that the so-called 'catillus' ammonite (see p. 52) 

 was obtained from the Grault here, proving the identity of the lower 

 part of the clay with the lower part of the clay in Harris's pit 

 (fig. 3, p. 7), and therefore including this section in the area sup- 

 posed to be inverted. 



Fig. 6. — -JRe-excavated section in the western hanh of the old fit ^ 



100 yards north of Sandpit Cottages, September 6th, 1920. 



Surface, about 350 feet O.D. 



S. N. 



'itiy^^ Scale. 







10 feet 



-5 



Thickness in feet. 

 Clay-slope, slipped and overgrown ; no section about 9 



ZY 



--—. Palish blue-grey Gault, perhaps slipped about 2 



4 



4. Dark greyish-blue and mottled platy Gault, with a few small brown- "^ 



coated phosphatic nodules : ' Belemnites minimus,' ' Inoceramus > ^i 

 concentricus,' and traces of other shells very poorly preserved : ) ^ 



passing down into — 



4 a. Gritty clay, with ferruginous streaks and scattered lydites, be- \ i f i 

 coming more plentiful downwards : ) " 



passing into — 



3 b. Dirty loam and partly decomposed loamy greensand, sprinkled") 

 with bits of polished grit and lydite (up to i inch in diameter), j 

 and containing worn fragments of iron-grit (up to 8 inches) and ^seen to 1^ 

 rough gritty phosphatic nodules, externally grey, internal]}^ black | 

 (up to 6 inches in diameter, but mostly smaller). J 



Base obscure, but Coarse Sand (1) occurs lower in the bank. 



The obscured south-eastern part of the above-described pit is 

 practically conterminous with the western end of the workings in 

 the big Nine Acre pit (see plan, fig. 2, p. 5). The west-and-east face 

 of the latter pit is rather more than 300 yards long; but the present 

 Avorkings are mainly at the eastern end, where the Sands rise nearlj- 

 to the surface. A good section is still, however, exposed in one 

 place near the western end (partly shown in fig. 7, p. 16) within 



