Yol. 69.] AGE OF THE SUFFOLK VAXLEYS. 595 



not absolutely, vertical sides occupied a deep gully in the Crag, the 

 trend of which was north-north-westerly, pointing up the upper 

 part of the valley, but almost at right angles to the course of the 

 Deben at this place. 



(b) The disturbance at Hasketon brickyard should be mentioned 

 here. It may be connected with the valley-ice, but is local in 

 character. 



(c) The anomalous levels of the Eeading Beds, London Clay, and 

 Crag at Woodbridge, and the sequences of strata met with in well- 

 borings, point to much disturbance (see p. 607). 



Brett Yalley (PI. LV, fig. 2).— This is a miniature of the 

 Gipping Valley, showing similar phenomena on a smaller scale. 



(a) Prom the irregularity of the beds, there seems to be dis- 

 turbance at the spur on the right bank, south of Semer Church,. 

 and also farther south near Cosford Union Workhouse. 



(6) At the big spur north-west of Hadleigh, on the right bank, 

 considerable disturbance of Eocene beds was figured by Mr. W. 

 Whitaker, 1 and, later, different sections were figured by myself. 



(c) The hill on which Hadleigh Railway-Station is situated, 

 on the left bank, is capped by disturbed Glacial beds, but no good 

 sections lower down the hill are visible. 



(d) In the Geological Survey Memoir disturbance is noted and 

 figured at several places on the right bank : for instance, near 

 Overbury Hall, Layham. 2 The spur south of Layham Church 

 contains a brickyard where fine contortions in loam, sand, and 

 Boulder Clay were to be seen. 



(e) There is good evidence of disturbance near Shelley Church, 

 Eocene beds, etc., occurring at very unusual levels. 3 



Stour Valley (PL LV, fig. 3). — As would be expected from 

 the position, disturbed beds were noted at the brickyard at 

 Boxford, where the valley and stream change direction from east 

 to south, the River Box being tributary to the Stour. The brick- 

 yard is now disused, and the sections are overgrown ; but 

 contorted London Clay, Glacial Sand, and Boulder Clay (the last 

 extending down into the valley) were observed and figured in 

 1885. 4 



The Stour, cutting, as it does, its valley largely through Chalky 

 is not quite comparable with other Suffolk rivers. The dis- 

 turbance also seems to be of a type rather different from that 

 observed farther east, being characterized by an accompaniment 

 of large quantities of chalky sands and bedded chalky silts or 

 loams. These are not strictly paralleled by anything in the easfc- 

 of the county, although similar sands and silts do occur in very 



1 Mem. Geol. Snvv. 1885 (10) p. 21 & fig. 7. 



2 Ibid. pp. 88, 100, etc. 



3 Ibid. pp. 9-10. 



4 Ibid. pp. 18-19 & fig. 5. 



