THE MELBOUEN EOCK, ETC. 221 



portion of the face of the exposure is seen weathering into nodular 

 lumps. 



At the Melbourn lime-kiln pit the section exposed is : — 



ft. 



Top soil, rubble and much broken chalk 8 



Bedded white chalk 4 



Melbourn / Thin-bedded yellowish chalk, rather hard 4 



Rock. I Hard rou^h nodular chalk 3^ 



/^Sof't laminated marly bands enclosing harder 



Zone of I greyish marly chalk 1 



Bel vlena 1 ^^'^y marly chalk 2 



■ -^ "I Hard white rocky chalk with smooth fracture . 2 



\^Grey marly chalk 1|- 



White chalk 2 



At the northern end of this pit the hard white chalk near the base 

 is seen passing into a nodular band, the Marbled Rock. Unfor- 

 tunately a heap of rubbish hides all but a small portion of it. 



There is a second pit at Melbourn, and although only a quarter 

 of a mile distant from the preceding exposure, there is some dif- 

 ference in the beds. 



ft. 

 Soil and rubbly chalk 3 



Rock [ Hard whitish nodular chalk 3 



y p r Yellowish laminated marl 1 



Bel^vlma j Hard rocky white chalk 1^ 



'^ ' 1 Soft grey marl 2^0! 



White chalk 2 



The lower marl band is variable in thickness, at some places just 

 traceable, at others a foot thick. 



The next exposure of importance to the westward is a pit by the 

 roadside a mile N.W. of lioyston, in which the section shown is : — 



ft. 



Soil and chalk rubble 3 



Whitish thin-bedded chalk 3 



TIT lu I Yellowish rather nodular chalk with thin marly 

 Melbourn j ^. i„:„:: ,i..i„_ 



Kock. 



Zone of 

 Bel. plena. 



partings containing nodules 3^ 



Hard rocky whitish chalk 3^ 



^Thin bands of buff-coloured marl enclosing 

 lenticular beds of harder and whitish marly 



chalk .- 2 



Hard marbled rock 1 



^ Grey marly «halk , 2^0! 



White chalk 6 



It may be noted here that the hard smooth white chalk bed in 

 the zone of Belemnitella plena is absent, and in its place is a greyish 

 band containing many nodules of whiter material. Towards the 

 northern end of the exposure this band becomes rather thicker, and 

 the whiter material predominates. The band of marly chalk at the 

 base is also more distinctly marked. This band also contains at its 

 base many pieces of white chalk, giving it in some places a mottled 

 appearance. 



At Litlington a good exposure is seen about half a mile S.S.E. of 



