340 ME. W. HILL ON THE LOWEE BEDS OP THE UPPEE 



difference of about 2 feet in my estimation of the thickness of the 

 Lower Chalk here and in South Lincolnshire. Large Ammonites 

 are common, as usnal, at or just above the horizon of the " Grey 

 Eed," and I left one in the cutting 1 foot 8 inches in diameter. 



Pollowing the outcrop of these beds to the northward, in a road 

 from South iS'ewbald to the Wolds, Grey Chalk is well exposed ; dark 

 grey shaly bands (the Belemnite-marls) are seen at the angle of the 

 roads *. 



The next important exposure of the Lower Chalk occurs about 

 300 yards E.S.E. of Park Farm, Londesboro.' The face is much 

 obscured by the slipping down of rubble from the upper part of the 

 pit. Beneath two or three feet of loose material there are clear 

 indications of the Belemnite-marls. Lower down a pink band and 

 the " Grey Bed " occur, the latter fossiliferous as usual, but not 

 enough exposed for a large collection. 



I hardly think the Chalk seen here is in its natural order ; most of 

 the higher beds seem to me to be slipping over the lower ones. The 

 Belemnite-marls are 23 feet above the " Grey Bed." The central 

 part seemed fairly solid and continuous. I give the following 

 section for what it may be worth : — 



ft. in. 

 Eubbly chalk and soil with marked indications of the 



Belemnite-marls at base 2-3 



( Face obsciu-ed by tains, chalk appeared broken up 10-12 

 I Hard roughish chalk weathering into platy pieces, 



Grey Chalk. ■{ thin marl bands _ 3 



I Eather soft marly pink chalk 3 6 



^^ Hard rough chalk with green-grey marl bands 5 



The f Hard grey chalk, rather nodular, green-coated 



"Grey Bed." [ nodules at base (fossils) 1 6 



Greyish-white chalk underlying, coTered by talus. 



The top of the Grey Chalk can be seen near Towthorpe corner 

 and again at Warter, a locality which time and circumstances pre- 

 vented me from visiting f. Between Millington and Bishop Wilton 

 I saw nothing worth recording, but on the brow of the Wolds, about 

 half a mile E.S.E. of the latter village, 4 or 5 feet of rough nodular 

 chalk was exposed in a shallow pit. Holaster subglobosus and 

 Terehratulina gracilis occurred, the former testifying to Lower Chalk, 

 but the horizon is uncertain. A similar exposure in a similar chalk 

 occurs about a mile to the north of the last. 



Garrowby Park is the next place where Lower Chalk is seen. 

 Above a foot of compact yellowish-red chalk, ^^-hich I regard as the 

 " Sponge-bed," 3| feet of rough grey gritty chalk occurs, reminding 

 one of the Inoceramus-'hedi of South Cave. The section here is 

 given on page 335. 



Grey chalk is seen again in Painsthorpe Dale, east of Kirby 

 Underdale, and in Uncleby Dale I saw a pink band in rather marly 

 soft chalk. In the rubble above, exposed by burrowing rabbits &c., 

 EcMnoconus suhroiundus and RhyncJionella Cuvieri occurred, but 

 nothing could be seen of the succession of the beds. 



* " Geol. of the country between York and Hull," Mem. Geol. Survey, p. 29^ 

 t Geol. Surv. Mem. York and Hull, p. 29. 



