CARTER : GLACIATION OF DON AND DEARNE VALLEYS. 419 
At Hexthorpe Flats, near Doncaster, there is a section of 
a thin bed of boulder-clay on false-bedded Magnesian Limestone. 
In the pit is a large boulder of striated Carboniferous Limestone. 
Blocks of basalt have been obtained from excavations in 
Doncaster. L^p the slope of the Magnesian Limestone and 
Coal Measure shales forming the southern side of the gorge of 
the Don, drifted pebbles and lumps of red marl have been found 
at elevations up to 300 feet at Edlington (Fig. 9), and scattered 
quartz and sandstone pebbles and limestone fragments are found 
scattered over the limestone at Clifton and Braithwell up to 
400 feet. 
Fig. o. 
SECTION IN RAILWAY LINE NEAR HAMPOLE STUBBS. 
liCngth 200 yards. Greatest height 20 feet. 
L StiflF Brown Clay, no boulders, 10 feet. 
2. Boulder Clay, 4 feet (Magnesian Limestone and Coal Measure 
Sandstone). 
3. Yellow Marl, 5 feet (re-assorted Magnesian Limestone). 
Between the Dearne and the Hickleton escarpment the 
evidences of glacial action are few and far between, but the 
Survey Memoir* records boulder-clay east of Emsall Lodge 
containing pebbles and boulders of Carboniferous sandstone, 
quartzite, and encrinital chert. Mr. E. Leonard Gill, B.Sc.,t 
found a section on the new railway line near Hampole Stubbs 
(Fig. 5) where the Doncaster road crosses the line, which showed 
the following succession : — 
1. — Stiff brown clay, no boulders... .. 10 feet. 
2. — Boulder-clay, containing pebbles, frag- 
ments, and rounded boulders of sand- 
stone and Magnesian Limestone . . 4 feet. 
* See p. 777. 
t Communicated by Professor Kendall. 
