326 MR. W. HILL ON THE LOWEE BEDS OF THE UPPER 



hoe Stone. This bed, which is formed by the basal courses of " nodiikr 

 grey chalk underlying the lower pink course" *, is always well marked 

 throughout the county by the characters noted above, as well as by 

 the chalk which lies beneath and above it. 



In the following details I indicate its position in the sections 

 described in the Memoir, and give other sections to the north of the 

 area included in it. 



Besides Mr. Rutter's pit at Welton, the " Grey Bed " is seen, in 

 a pit just on the other side of the road, opposite the Cross Keys Inn, 

 at the north corner of which the following succession was measured 

 (page 44 in the Memoir) : — 



ft. 

 Thin-bedded rubbly chalk with persistent layers 

 of shaly buff-coloured marl, containing Tere- 



hratulina gracilis 10 



Tl " r , P rl " f^erv hard nodular grey chalk, irregularly bedded 



j_ne urey±)ea. | {Ehynch. Mantemana^VL& O.vesicularis) 3 



Hard greyish-white \ chalk in thin beds with 



partings of laminated marl 6 



Hard greyish-white f chalk in beds about a foot 

 thick 5 



The bed is seen again at South Thoresby. The following is the 

 section (slightly abridged) given in the Memoir (page 52) : — 



ft. 



Broken rubbly chalk 1 



Pale pinkish-white chalk 2 



Hard brittle yellowish-pink chalk 7 



Layer of dark grey clay — 



Greyish-white chalk 6 



Compact grey chalk 4 



Layer of grey shale — 



Hard cream-coloured chalk 4 



Thin layer of soft yellowish marl — 



Eeddish marly chalk indistinctly bedded, pink and brick- 

 red above, pink with grey lumps below 6 



Hard grey(f5^) t gritty chalk in thick beds, the top 



being nodular and broken 4 



(A large Ammonite seen here.) 



The " Grey Bed." Hard grey chalk with nodular crystalline lumps 3 



The next important exposure of this bed is at Tetford Wood. 

 The section was originally taken by Prof. Judd. It is slightly 

 altered in the Memoir and given as follows (page 54) : — 



ft. 



Soil and chalk -rubble 2-3 



Greyish-white chalk in thin beds rather broken 10 



Pale pink chalk, with soft marly layers, and a whitish 



baud at base 5^ 



Hard nodular grey chalk 2 



The "Grey Bed" /^^^^ ^^'^^^ [? gritty] chalk ("drab bed") l\ 



^ ' \ Greyish nodular chalk ("knobbly white bed") 2 



Greyish-white chalk, evenly bedded, &c 12 



Nodular grey chalk in regular beds 3 



* Geol. E. Line. p. 34. See also diagram, 

 t The alteration here is mine. 



