438 



Mr PHEAR, ON THE GEOLOGY OF SOME PARTS OF SUFFOLK, 



Fig. (10). 



(1) Alternate layers 

 of brick-earth 

 and sand. 



(2) Angular flints. 



(A) Boggy meadows. 



(B) Drift-clay. 



In (2) a group of bones of some large mammal were lately found ; they were appa- 

 rently in situ, but were very fragmentary and corroded. 



At Stonham Brewery the valley divides, one branch passing up to Aspal Stonham and 

 Mickfield, the other running to the left under Little Stonham church : both these rapidly 

 become shallow and lose the presence of the peaty meadows. The wells of the Brewery are 

 sunk through the flat alluvial deposit, and reach a gravelly bed with a perpetual spring of hard 

 water at a depth of between 10 and 15 feet. 



A short distance up the left branch on its right flank the well of E. Stonham Rectory 

 passes through 40 feet to a bed of gravel, where there is again a never-failing spring of hard 

 water. The drift-clay here comes down to the bottom of the valley, but along both its sides 

 are traces of a gravelly bank, and about a mile further up is a pit exhibiting 10 or 12 feet of a 

 sandy dark red gravel, with unbroken pebbles resting upon at least the same depth of a marly 

 sand impervious to water : this mass is bounded laterally by drift-clay : fig. (11) is the section 

 of the valley at this place. 



Fig. (11). 



(1) Dark red sandy gravel. 



(2) Marly sand. 



(3) Drift-clay. 



The remaining portion of the Gipping valley from Needham upwards has not yet supplied 

 me with much evidence of a definite kind. On the left-hand side of the road from Needham 

 to Stowmarket, just as it leaves the former town, is a pit whose section is given by (fig. 12). 



Fig. (12). 



(1) Thin layer of chalky gravel with broken 

 belemnites, &c. 



(2) White brick-clay, perhaps 20 feet thick 



On the other side of the road adjoining Hawk Mill is another pit of the same kind, in 

 which some depth of sand overlies the brick-earth. 



