The 



i 



CRETACEOUS SERIES IK LINCOLNSHIRE AND YORKSHIRE. 339 



west of the bridge over the line near the entrance to a short tunnel 

 under Sugar Loaf Hill, north side of line ; — 



ft. in. 

 / Chalk with flints — (section is measured from the lowest 



flint line) +100 



-,.,,, p. ,, J Hard, rough, cream-coloured chalk, weathering in 



■ I platy pieces with rough surfaces, divided into courses 



I not less than a foot thick by bands of yellowish-grey 



[ marl 13 



I' Yellowish-grey marly chalk, soft, but enclosing lenti- 



fp, n cular beds of harder material 1 9 



llie ^^^f' ^ I ^ variegated marl, upper part usually bluish or yel- 



eenmi e a ^ lowish grey, centre dark grey, in places almost black, 



jpLena. | -^^ ^^^^^ almost invariably greyish buff", passing down 



\^ or graduating to 1 4 



r nil u f -Rough nodular layer, nodules parted by green -grey marl; 



Urey unaiJi. | ^^-^ ^^^ ^^^^ graduates into the chalk beneath... 8 in. to 1 ft. 



Section continued 65 yards west of a milestone and between 

 300 and 400 yards west of last position, on south side of line : — 



/'Whitish chalk, weathering in platy pieces, apparently 



in courses divided by marl bands ; all rather hard... 23 

 A course of hard whitish chalk, but passing down 

 rapidly into greyish, with a marked grey marly band 



at base (fossils) 1 3 



Grey Chalk. ") Hard whitish chalk, weathering into rough platy frag- 



I ments, divided into courses by marked marl bands... 6 



1 Softer marly chalk, rather nodular, bedding indefinite, 

 stained a bright pink 4 



\^ Whitish, rough, hard chalk in courses 3 



The f Hard, grey, nodular chalk, becoming platy below, green- 

 "GrreyBed."\ coated nodules at base ; fossils 1 6 



Section continued at the east end of the short tunnel at Weedly 

 Springs, north side of line : — 



Hard whitish chalk seen underlying the " Grey Bed " for 8 ft. 



Continued north side of line, 200 yards east of the signal-box at 

 Weedly Springs : — 



^Hard whitish chalk, rather rough ; the continuation of 

 that at the east end of the tunnel. Total thickness 

 below the " Grey Bed " (which is not seen here) esti- 

 mated at 20 



Chalk Marl. { Hard grey chalk, more gritty at its base, divided into 



courses by marl bands 10 



Bed of compact limestone, yellowish white, rather ob- 

 scure and broken, appeared to graduate into the E.ed 



Chalk 1 



Oault " Eed Chalk (for details see page 333) 6 9 



The similarity in the relations and sequence of the beds shown 

 m this cutting to those of the Lower Chalk of Lincolnshire must be 

 obvious to anyone who compares them. The section shows a com- 

 plete continuation of the Lincolnshire facies thus far north of the 

 Humber. The " Sponge-bed " seemed to me to be present, but with 

 no distinct parting between it and the Red Chalk. Above it grey 

 and gritty chalk, the equivalent of the Inoceramus-h&di^ passed up 

 gradually into the hard and whiter Chalk Marl. There is a 



