Vol. 57.] AT DALLINGHOO (SUFFOLK). 287 



(C.) Bituminous Shale from the Well at Dallinghoo. 



Its inflammable property is due to included fish- and cephalopod-remains. 



The disintegrated shale yields numerous bones and scales of fishes. Some 

 foraminifera, of the genus Pulvinulina, were also found. 



No ostracoda were met with. [Both Mr. E. T. Newton and Mr. F. Chapman 

 tliink that this shale is Kimmeridgian.] 



(D.) Sand from the Well at Dallinghoo. 



This consists largely of clear quartz-grains, subangular or well rounded in 

 outline, and often showing highly-polished surfaces ; a granule or two showed 

 crystalline facets, which seems to point to an origin in the Triassic sandstones. 

 There are also chips of iron-stained flints, and whitened fragments of the 

 same, usually angular or subangular. A few rolled or chipped foraminifera 

 are present, all undoubtedly of Cretaceous age, including Textularia sp., 

 Glohigerina cretacea, GL marginata, Trimcattdina lohatida (with a chalky 

 matrix adhering to it), and Pulvhiulina sp. 



The materials of the larger fragments consist of flint, chert (with sponge- 

 spicules), quartz, and lignite. 



In thus putting before the Geological Society the facts, so far as 

 ascertained, from this interesting deposit, one is tempted to infer a 

 somewhat north-westerly direction to have been the track of the 

 ice which collected the material of the Boulder- Clay and subjacent 

 sands. 



My best thanks are due to Prof. T. Eupert Jones, Mr. E. T. 

 J^ewton, and Mr. Frederick Chapman for their valuable help. 



Discussion. 



The Rev. Edwin Hill said he was pleased that attention should 

 be directed to the materials of the Boulder-Clay. He agreed with 

 the Author's view that, in Suffolk, these came chiefly from the west : 

 his own belief was that little, if any, was from the north. 



Mr. H. W. MoNCKTON drew attention to a well in South wark 

 Bankside, No. 29, described by Mr. Whitaker, Mem. Geol. Surv. 

 ' Geology of London ' vol. ii (1889) p. 218, the section in which 

 bears considerable resemblance to that described in the foregoing 

 communication. 



Prof. H. G. Seeley said that the thickness of the Thanet Sands 

 in the Southwark well was very similar to the thickness of 40 feet 

 found under the Bank of England : it was of interest, from the rapid 

 thinning of the sand to the west and north-west. 



The section at Dallinghoo appeared to show that the Boulder-Clay 

 filled an ancient valley, like several in Cambridgeshire which are 

 similarly filled with Boulder-Clay. The contents of the Boulder- 

 Clay are almost entirely fossils of the Lias, Oxford Clay, and 

 Kimmeridge Clay. It was remarkable that there were few, if any, 

 recognizable examples of the rocks, by which those clays are 

 commonly divided in the North of England, present in the Suffolk 

 Boulder-Clay. He regarded the inflammable condition of the 

 Kimmeridge Clay as always due to marine algae. 



