464 PEOCEEDINGS OP THE GEOlOalCAL SOCIETY. 



laminated sandy clay, at the base of which freshwater shells are 

 found. The shells are only in occasional patches, and consist of 

 Unio pictorum, Cydas cornea, and BytMnia tentaculata* . 



As we approach Pakefield the bed of shingle, which rests on the 

 clay (3) becomes ferruginous, and contains pebbles of clay derived 

 from the Chillesford Clay. A considerable number of mammalian 

 remains'(Elephant?, Rhinoceros, Deer, Ox, and Horse, the same appa- 

 rently as in the Forest-bed of Norfolk) have been found in this bed. 



Besides the common occurrence in this chff of rootlets passing 

 from the base of the shingle into the underlying clay to a depth of 4 

 or 5 feet, the trunk of a tree, 20 feet long, was found some years 

 since on the surface of the clay-bed (3), and nearer to Pakefield the 

 stool of a large tree was found in situ, as at Hasborough. 



Nearer to Pakefield the Chillesford Clay is entirely broken up, and 

 a bed composed of sand, flint-pebbles, and pebbles of Chillesford clay 

 takes its place, while the " Westleton sand and shingle " is imme- 

 diately overlain by the upper division of the Boulder-clay. 



At Corton, to the north of Lowestoft, the Forest-bed appears again 

 for a short distance at the foot of the cHff, with the Lower Boulder-clay 

 immediately above it, whilst the Westleton beds are wanting. They 

 are largely developed inland, however, and are worked on the west side 

 of the Somerleyton brick-pit, and at several pits N.W. of Lowestoft. 



From the clifis at Corton, where we lose the Forest-bed, to the 

 cliffs at Hasborough, where it again crops out at the foot of the cliff, 

 is a distance of 24 miles. The Crag-beds beneath it there (if they 

 exist) are not exposed ; but in the series above it we find the same 

 order of succession as at Southwold and Kessingland. The Forest-bed 

 along this coast aj)pears to exist, as between Pakefield and Kes- 

 singland, under two forms : — the one a local freshwater deposit of 

 grey and carbonaceous clay, containing the remains of mammalia, 

 insects, plants, and freshwater shells ; and the other of trees, rooted 

 sometimes in this bed and sometimes in the Chillesford Clay beneath 

 it. It is not often the latter is seen. It appears, however, on 

 the shore at low tide at Pauling. The Forest-bed itself has been 

 bored into at Hasborough by Mr. Gunn to the depth of 14 feet, 

 without reaching its base. From this point to Trimlingham none 

 of the beds under this level are visible ; but the "Westleton beds are 

 well exhibited at various places, as, for example, at the cliff north 

 of Bacton Gap (fig. 35 ; see also coast-section, PI. XX.). 



Cliff near Bacton. 



6. Boulder-clay (lower division) with 

 fragments of shells. 



5. Sandy flint-shingle with seams of 

 laminated clay {x) and fragments 

 of wood ; shells at places in lower 

 part of the shingle, 10 to 12 feet. 



6'. Elephant-bed ^ to 1 foot. 



4. Top of Forest-bed. 



Mr. Crowfoot's Collection. 



