462 



PROCEEDINGS OF THE GEOLOUICAl SOCIETY. 



more than from 20 to 25 feet thick ; and sands predominate, the 

 shingle being subordinate. 



In the neighbourhood of E,eydon, near Southwold, the same beds, 

 usually light-coloured, are seen underlying the Boulder-clay in some 

 of the clay-pits ; but they are better exposed in the pits along their 

 line of outcrop on the north side of the valley of the Blyth, nearer 

 Southwold. In a pit close on the north-east edge of Reydon marshes, 

 I found in these sands, last autumn, a seam of the same pebbly sand 

 concreted by oxide of iron. This seam was fuU of the casts and 

 im-pvessions oi My tilus edulis in all stages of growth, and many of the 

 sheUs double. Southwold* stands on these beds ; and their relation 

 to the Boulder-clay and to the valley-beds was well exposed before 

 the removal of the brick-pit, just north of the town, further from 

 the shore. The section was as follows : — 



Fig. 31. — North end of Southivold Cliff (see also coast sect. PI. XX.). 



( 



feet. 

 a. Brick-earth and gravel, witb the remains oi Elephas primigenius ...5 to 10 



8. Boulder-clay (upper division) 8 to 12 



5. White and yellow sand and shingle, with a few ferruginous bands 20 



In the next cliff, at Easton Bavent, we find the same sand and 

 shingle, with seams of the ferruginous bed. In the latter, casts of 

 shells are numerous, but difiicult of determination. I found 



Cardium, Mytilus (edulis?), Littorina, Natica, 



and numbers of small Foraminifera. 



The Chillesford Clay here rises from beneath these shingle- 

 beds (5) ; and under the clay is the well-known Southwold crag 

 (ante, fig. 26, p. 345). This section clearly shows not only the re- 

 lation of these divisions, but in the same cliff, a short distance further 

 north (fig. 32), may be seen the setting-in of the Forest-bed and its 

 relation to the same series. 



Fig. 32. — Section near the north end of Easton-Bavent Cliff. 



feet. 



5 White and yellow sand and shingle 5 



4. Traces of wood and carbonaceous 

 matter. 



3. Laminated grey clay with double 

 shells in the position of life (Chil- 

 lesford Clay) 6 



3'. Shelly sands (Chillesford Sands). 



* But for the existing sands and shingle of Southwold strand, I should have 

 preferred " Southwold " to " Westleton " to designate tliese beds. 



