Fig. 4. Section at Beach MiUs, Worth Valley, Keighley (now built up). 
(A) Between six and eight feet of purplish-blue clay running into yellow clay 
and sand, with a few stones; (B) Slightly-laminated blue clay without stones; 
(C) Greyish-blue clay with many stones of all sizes up to 4 ft. in diameter — at 
least 80 per cent, limestone. Stones rounded and polished, and scratched and 
striated in various directions. Thickness not ascertained. 
Fig. 5. Section from Harden Moor to North Beck, Keighley. — (A) Outcrop 
of calliard bed in situ; (B) Old sea-beach of yellowish -brown boulder clay; 
(C) Rounded calliard stones and bovdders; 1. Greyish-blue boulder-clay reaching 
a thickness of from 40 to 50 feet; 2. Yellowish-brown boulder-clay; 3. Con- 
fusedly-laminated sand and gravel reaching 50 feet in thickness. In a direction 
at right angles to this section, or towards the west-south-west, the clay (2) 
rapidly thins out. 
Fig. 6. Section of a Sand-pit at Marley, near Keighley. — 3. Sand about 20 
feet in thickness ; 4. Loamy clay with boulders up to 2 ft. in diameter, lying at 
all angles, about 10 ft. in thickness. The sand shows clear traces of denudation 
before the deposition of the clay, and both clay and sand must have been after- 
wards denuded. 
Fig. 7. Section near a Farm-house North of the White Hart Inn, on the road 
between Aherferd and Bramham. — The knoll is nearly the highest part of the 
district (between 200 and 250 feet above the sea). (A) Permian limestone, over- 
lain by patches of dark clay, and sand ; 3. Gravel, consisting of weU-rounded 
pebbles and boulders in a sandy matrix, about 10 feet in thickness ; 4. Eeddish 
clay, with rounded and subangular stones up to 2 ft. in diameter, consisting of 
sandstone, miUstone-grit, carboniferous limestone, chert, local Peimian debris, &c. 
Fig. 8. Section across the Aire Valley near Bingley. — 2. (N.E. side of the 
railway) Boulder-gravel running upwards into loamy clay. The boidders reach 
a size of 5 feet in average diameter, and consist principally of grit and sandstone. 
Some of them are decidedly striated. There are many small and extra-rounded 
pebbles, a large per centage of which are Limestone. 2. (Between the railway 
and the river) appears to consist mainly of rounded stones up to 5 feet in 
diameter, in a matrix of clay or loam. I believe the blue clay might be found 
underneath, as a short distance to the Xorth-west of the section I saw it in the 
river-channel under the yellowish-brown boulder-clay and loam. The bvilk of the 
drift in the neighbourhood of Bingley consists of boulder-clay, and I have not 
been able to recognise the great expansions of so-called river-gravel mentioned 
by Mr. A. Tyler in his paper in the Quart. Journ. of the Geol. Soc. 
Fig. 9. Mode of occurrence of the Sand-hills on one side of the Aire Valley, 
near Esholt. — The sand contains boulders of millstone-grit, limestone, &c., some of 
them nearly angular. Their positions show that they must have been dropt in. 
The laminae are crossed by nearly vertical streaks. The sand is covered by, or 
runs upwards into, loam and clay. 
Fig. 10. Section near Holheck Station exposed by a cutting in the Leeds and 
Harrogate Railway. — (A) Carboniferous sandstone; 2. Yellowish-brown loam 
and clay, with many rounded and subangular stones, and a few boulders, con- 
sisting of sandstone, millstone-grit, fragments of Stigmaria, quartz, &c., reaching 
12 feet in thickness. It is difficiilt to say whether this plateau of drift was 
deposited before the valley of the Aire existed, or whether its deposition was 
continued in a northerly direction so as to fill up that valley, and afterwards 
removed as far as the south side of the canal by a process of re- excavation. 
Fig. 11. Section near the South and North entrance to the Arthington Rail- 
way Tunnel. — Near the north entrance the yellowish-brown boulder-clay would 
appear to have been so Wolently driven against the rocky cliff as to make the one 
