part 1] GAULT AlS^D LOWEE GREEXSAXD XEAE LEIGHTOIf. 



19 



of iron-grit in their upper part just where the Silts thin out, under 

 tlie garden of Miletree Farm, so that the adjacent Miletree pit 

 (fig. 10) has a section showing eroded crags and hollows, like 

 Nine Acre pit. 



W. 



Fig. 10. — Part qf section at the northern end of Miletree pit, 

 Shenley ; September 13th, 1920. Surface, ahout oJ^O feet 

 O.D. ; witli a gentle slope south-eastwards. 



E 



Vertical Scale 



1 feet •"■•■■■ 

 Hor'zontal reduced 



ZY. 



ZY. 



4. 

 4 a 



3. 



Thickness in feet. 



Soil, passing down into ' trail ' of stonj' dark clay, full of flints and 

 drift-stones, looped and pocketed among clay with few stones : 

 passing downwards into— 



Disturbed and rearranged pale-blue Gault, mostly' or wholl3' ") 

 ' creep ' ; much slickensides ; 'race' abundant in some patches. ) 



Weathered ferruginous bro\ynish-blue Gault, with definite bed- ") 

 ding: some ' race.' ) 



Dark greyish-blue Gault, with rusty planes, tliickl}^ sprinkled"^ 

 throughout with grit and lydites (up to ^ inch in diameter), but j 

 most abundantl}^ towai'ds the base : also a few brown-coated Y 

 nodules (up to 2 inches in diameter), internall}' black and some- j 

 times including grit grains : no fossils seen. J 



Iron-grit breccia, pockety, and uneven at the top and bottom, "^ 

 with a plentiful admixture of grit (up to 1 inch in diameter), { 

 polished fragments of ironstone, and a few pale-grey gritty f 

 phosphatic nodules ; not much tabular ' iron-pan.' J 



3 a. Very gritty dirty sand and loam, with grit-pebbles up to 1^ inches ") 

 in diameter and a few pale gritty phosphatic nodules : in > 

 hollows and pockety ; uneven base. j 



1, Coarse cross-bedded Sands indurated at the top on both sides of a 

 hollow into irregular bosses of iron-grit (Ix), quartzitic in places, 

 up to 2 or 3 feet thick: the Sands mostly white under the 

 hollow, but becoming stained lemon-, orange-, and coffee-coloured 

 in the neighbourhood of the iron-grit seen 12 to 15 



The Sands rise to the surface on both sides beyond the section, 

 within 20 or 30 yards. 



Other sections similar in the main to the above are (Septemberj 

 1920) less clearly exposed on the south side of the pit ; but at the 

 entrance into it from the road, the ferruginous sands and iron-grit 

 rise practically to the top (best seen in 1909), a continuance of 

 the conditions visible on the opposite side of the road in Nine Acre 

 pit. The Sands are also close to the top along the eastern side of 

 the pit, partly owing to the downslope of the ground. 



c2 



3 to 4 



2 to 3 



ItoU 



ito 



tol 



up to 2 



