Fomliferous Deposits, Lincolnshire, etc. 513 



The diameter of the second boring was at first 4 inches, narrowing 

 to 3 inches at a depth of 15 feet. It was found necessary to line the 

 boring with the tubes throughout. 



The section seen in the brickyard and proved in the borehole was 

 as follows : — 



Surface soil (at 95 feet above O.D.) 



Clay with foreiga stones (see Note A) 



"Well-worn shingle, principally of battered flints 



Laminated warp with estuarine shells, and at its base a thin seam 

 of peat associated with a sandy warp containing fresh-water 

 shells in one part of the pit (see Note B) 



Clean yellow sand, with pebbles of chalk and flint 



Eed clay passing downwards into tough reddish-brown clay 



Pnrple clay, streaked with silt and loam, passing downwards into 

 tough purple clay with small stones, including some erratics (see 

 Note C) 



Stoneless purple clay ... 



Stoneless yellow clay ... 



FKnty gravel ... 



Yellow clay and loam with small drift pebbles 



Yellow sand, full of well-rounded quartz grains and specks of chalk 



Yellow sand and laminated clay 



Tough compact bluish-grey or lead-coloured clay, with a few small 

 foreign pebbles (see Note D) 



Tough yellow clay streaked with chalk 



Solid chalk and flint 



Total 96 



Note A. — Among the erratic stones which this clay contains the following were 

 identified : basalt, porphpites, rhomb-porphyi-y, grits, etc. 



Note B. — Mr. Clement Eeid records from this bed Scrohieularia piperata, Rissoa 

 ulvce, Tellina balthica, Gardium ediile, Mactra suhtruncata, Mytilus edulis, and 

 abundant Foraminifera (see Mem. Geol. Survey, Holderness, p. 58). 



Note C. — In general appearance this clay resembles the Purple Clay of Holderness. 

 Among the pebbles washed out of 30 lb. of the clay brought up by the augre, chalk 

 and flint greatly predominate, but the following rocks were also represented : 

 red chalk, black flint, Spilsby sandstone, ferruginous pebbles, quartz, basalt, and 

 porphyrites, besides many undeterminable small pebbles. 



Note D. — This clay is hard and tough, and very different from A and C both in 

 texture and colour. It resembles in colour the Basement Clay of Holderness. 

 The pebbles are smaller in size than in C, and there is a still higher proportion of 

 chalk and flint. Among the erratic pebbles the following are recognizable: basalt, 

 porphyrite, sandstone, black flint, grit, quartz, etc. 



Mr. Eeid has examined the plant remains obtained by the 

 Committee from the band at the base of the warp, and reports as 

 follows : — " The plant remains obtained by Mr. Stather from the 

 peaty warp belong to the following species : — 



Hanunculus sceleratiis, Linn. Atriplex ? 



Eupatoriuin cannabinum, Linn. ZannichelUa pedunculata, Eeichb. 



Aster Tripolium, Linn. Scirpus setaceus, Linn. 



Lapsana communis, Linn. ,, marittmus, Linn. 



Mentha aquatica, Linn. ,, sp. 



Labiate (much crushed) Carex incurva, Lightf. 



" The list is a small one, but it indicates estuarine conditions, and 

 suggests a sub-arctic climate. With one exception the plants are 

 still to be found in the neighbourhood of the Humber; but one of 



