MIDDLE CHALK—YORKSHIRE. 
487 
It will be seen that the above succession is very different from 
anything seen in Lincolnshire. The beds seen below the line are 
comparable with those which occur in that county above the Belem - 
nite marl, and are clearly referable to the Rh. Cuvieri zone; the 
next 26 feet seem to be a sudden expansion of that zone, and the 
succeeding beds up to the course of hard limestone differ greatly 
from the lower part of the T erebratulina zone, as seen in Lincoln¬ 
shire, though they doubtless belong to it. I suggested in 1890 that it 
seemed “ as if the sharp demarcation which prevails in Lincoln¬ 
shire between the zone of Rhynch. Cuvieri and that of Terebra¬ 
tulina gracilis were here bridged over by the occurrence of passage 
beds.” 
The Lev. J. R lilake gave some account of this quarry in 1878 
(op. cit. p. 252), and remarked that “ there are three distinct bands 
in it, known to the workmen, and quarried for different purposes. 
The lowest bed [or part] is worked for whiting, as it is entirely free 
from flints. . . . It is this that produces the great number 
of shark’s teeth ( Ptychodus mammillaris) for which the quarry is 
noted, and it also contains Inoceramus Cuvieri [? mytiloides].” He 
states that the succeeding beds are known as roadstone, because 
they supply flints for road mending, while the highest beds are only 
burnt for lime. Terebratulina gracilis [? var. lata ] and Calerites 
subrotund,us occur in the middle beds. 
Mr. W. Hill has recently (1899) visited Hessle, and kindly sends 
me the following notes:—The continuous layer of flint near the 
top of the Hessle quarry is seen again at Hearfield’s quarry about 
200 yards north of the bridge over the line, and is known by the 
workmen as the “ red bed.” This pit is very deep, and its sides 
are absolutely perpendicular, so that it is like a huge square well. 
About 150 yards north of that worked by Hearfields Bros, is a new 
pit, at a rather higher level, which exposed the following section : — 
ft. in. 
3 0 
4 0 
0 2 
4 6 
0 3 
7 6 
1 3 
5 0 
25 8 
All the flints are of rounded nodular shapes, not mammillated or 
lenticular, and there are no continuous seams or floors. No fossils 
were found on the spot, but the character of the chalk suggests 
that it is a continuation of the Terebratulina zone, and Mr. Hill 
found fragments of several Specimens of T erebratulina preserved in 
Soil and rubble - - - - - - 
Rather broken blocky chalk, hard and white with a layer 
of flint nodules ------- 
A well marked layer of marl - - - - 
Massive chalk in two courses each with a layer of grey flints 
A well marked seam of marl ------ 
Massive hard white chalk, in two courses, a layer of large 
flints near the base ------- 
Very veiny chalk, the veins strongly marked in dark grey 
marl ---------- 
Massive chalk - -. 
