116 
secretary's report. 
of England, according to the Geological Survey, where the 
process of valley erosion can be better studied than on the 
Lincolnshire Wolds. The excursions afforded opportunities for 
the study of this phenomenon, and also of the recently discovered 
beds of Upper Chalk, and a unique development of the Xeocomian 
rocks. On the " windy wolds " the Yorkshire Geological and Poly- 
technic Society commenced its Eastertide excursions from Louth 
on Good Friday, April 23rd, in spite of cold winds and the driving 
rain which alternated with brief gleams of sunshine. Undeterred 
by meteorological disadvantages, they enjoyed an interesting 
excursion, under the leadership of the Rev. W. Lower Carter, 
who gave lucid explanations of the features of the country visited, 
of which he had made a careful study. Driving through the 
picturesque village of South Elkington, the party visited the 
Chalk Pit at Boswell, and thence the party proceeded to the 
head of a long valley, which runs to Hatcliffe, and walked to 
Beesby Top, where the interesting natural features were pointed 
out. Two approximately parallel drainage valleys, which run 
seawards, are connected by a remarkable valley at right angles 
to them. A lake was formed through the damming of the upper- 
most of the two valleys by means of ice during the glacial period. 
When this lake overflowed, the channel at right angles was 
excavated by water running from one to the other of the original 
valleys. The overflow-cliannel had comparatively steep sides 
as though the result of more energetic erosion than in the case 
of the valleys it connected, and the evidences of the presence of 
morainic debris was found in a field near the lip of the overflow. 
Pursuing the journey, the excursionists saw an interesting ex- 
ample of a somewhat rare case of direct overflow from the head 
of tlie valley. Proceeding through East Ravensdale to Hatclifle 
a remarkable series of three overflow- valleys, which successively 
formed the channels of a glacier lake fed by the Wold Newton 
Channel, was viewed. Several of these beautiful gorge-like 
channels were photographed, and erratics were not forgotten 
though no notable discoveries were made. 
The Yorkshire Geological and Polytechnic Society on 
Saturday, April 24tli, continued their field work in the neigh- 
bourhood of Louth, under more favourable conditions than 
