44 



ME. Ct. TV. LAMPLrGH OX THE JUyCTIOX OP [vol. IxXviUj 



Thiclcness. 

 f Slidiug Gavilt and soil (trench 2 to 2k feet deep) ; obscure 8 to 9 feet, 

 (in 2ud Step). Bine-grey Ganlt, probably in place, nnder 



sliding Gault seen abont 2 ft. 



(in 1st Step). Dark-blue Gault, probably in place (with 

 4. <^ 3 to 4 feet slipped clay above) with soit 



crushed decomposed traces of sbells seen abt.4ins. 



Yellowish-grey decomposed clay, probably 

 altered b\' recent weathering, with fairly 



^ sharp base on — 2 inches. 



3. (<lo.) Decomposed ochreous loam, streaky and^ 



patchy, with glauconitic dabs and streaks, 

 and soft pale calcareous patches; rather 

 sparingly mixed with polished grit-grains 

 and small flat worn bits of ironstone; 

 also containing a nodular lump, 8 inches )■ about 1 foot, 

 in diameter, of ferruginous pebbly mate- 

 rial (lydites, np to 1 inch in diameter, 

 and worn bits of ironstone), with decom- 

 posed calcareous cement, mottled with 

 glauconite ; fairly sharp base, on — 

 3a? (in sump). Rusty marly sandy rock, rather flaky; "^ 



(possibly like soft sandy ironstone in parts ; evi- >- f to 1 foot, 



Purbeck) dently altered by weathering. j 



f (do.) Ochreous weathered rather sandj- clay,^ 

 with a 1-inch streak of dark greenish- 

 blue clay at the bottom. | 

 (do.) Septarian claystone nodule, blue intern- )■ 5 inches. 

 P. ■{ alh', with a crimson and liver-coloured i 

 (supposed ferruginous crust: tailing otf into tbe | 

 Purbeck). ochreous clay. J 

 (do.) Eather pale buff marly clay, obscurely 



[_ shown and wet seen to 6 ins. 



(Bottom of the sump filled in before my visit). 



The beds below tbe Gault were much weathered, but it will be 

 seen that the section is identical, so far as it goes, with those 

 previously recorded. The conglomeratic calcareous lump in (3) 

 may be taken as a decomposed example of the ' lumps of calcareous 

 stone ' noted b}' Jukes-Browne in the fresh section. Only about 

 8 square feet of the surface of the basement-bed was bared for 

 examination in the recent trench. I understand that some traces 

 of ammonites were found in the OTerlrino^ Gault, but could not 

 be preserved. It will be noticed that Jukes-Browne records only 

 'impressions of Inoceramus^ and Dr. A. M. Davies only Inoce- 

 ramus concentricus, JBeJemnifes minimus, and foraminifera ; so 

 that the Gault here, even at its best, was but sparingly fossili- 

 ferous, like the lower Gault at Shenley, and with the same kind of 

 fauna. 



III. PjlI-eoxtological Notes. 



Note. — In the short references within parentheses in the text of the sub- 

 sequent pages (L. W.) denotes the Quarterly Journal paper of 1903 (vol. lix) 

 by myself and Walker, and (K. P.) the Geological Magazine paper of 1920 

 (vol. Ivii) by Dr. Kitchin <fc Mr. Pringle. 



In attempting to deal with the palaeontology of my subject, I 

 am. conscious how much has been lost to us by the death of my 

 former fellow- worker, by whom, had he lived, the major part of 

 the task would have been undertaken. As it is, I find mvself 



