278 COOKE : GLACIAL DEPOSITS OF CLEETHORPES AND DISTRICT. 
Pit I. (nearest the station) : 
(a) Soil cap. 1 foot. 
(4) Sand with shells (Cardium, Ostrea, Buccinum), remanie 
of an old sand dune... 2 feet. 
(c) Yellow loamy marl, containing quantities of Cydas, 
Pisidium, Limnea, and Valvata. foot. 
(@) Black, arenaceous peat with rootlets. 
(e) Stratified yellow clay, same as (c). 2 feet. 
(f) Shaly blue clay. 1 foot 6 in. 
(g) Rootlet bed, with large tree trunks. 2 feet. 
(%) Purple boulder clay. 30 feet +. 
The Hessle clay seems here to be absent, a result probably of local 
denudation. 
The greater part of the rock débris found in the Purple boulder 
clay consists of chalky rubble in a partially decomposed condition ; 
the remainder of small scratched, rounded, and polished boulders 
of sandstone, oolitic limestone, carboniferous limestone, basalt, 
red flint, mica schist, and granite. 
At the time of my visit there was a heap of 400 boulders of varying 
sizes in the centre of the pit bottom. These I sorted, and the follow- 
ing table gives the percentage of the kinds of rocks observed :— 
Eruptive rocks oe ie ee .»» 40 per cent. 
Gneiss, granite, etc. ... ve is = on 
Limestones (oolitic, carboniferous) ... oe ee 
Flint ... ro. 10 ” 
Sandstones, grits, and indurated shales ... 15 » 
Pits II. and III. are situated about 200 yards to the north-west 
of Pit I., and being contiguous the one to the other the sequence 3 
the beds in each is practically identical, save that the interesting 
shell marls (div. c) of Pit I. are here absent. 
The following details are representative of the main characters of 
the sections that are exposed in these pits :— 
(a) Coarse de-angulated yellow sand. 1 foot 6 in. 
(4) Yellow clay. 1 in. 
(c) Coarse yellow sand (remanié of an old sand dune). 2 feet 
(2) Peat bed, with much clay and many trunks. 1 foot 6 1. 
_ (e) Mottled yellow clay, which graduates into 
(7) Typical purple boulder clay. 36 feet +. 
The boulder clays in the three pits are very uniform and hoe 
geneous in character, and the materials that they contain—consisting 
