Vol.58.| ‘TEBSDALE, WEARDALE, AND THE TYNE VALLEY. 591 
beds of the limestone are not striated, though in places they show 
a little crumpling. This may, however, be due to ‘creep.’ At 
Broadwood Quarry, near Frosterley (64), on the right bank of the 
Wear, 40 feet of Boulder-Clay rests on the limestone. ‘The boulders 
in this deposit consist of Carboniferous Limestone and sandstone, 
both of which occur tn situ in the Dale. The surface of the lime- 
stone is striated, the direction being 8. 80° E. (true). Mr. Barker, 
the manager of the quarry, informed me that when first cleared 
the striated surface was several acres in extent. 
Between Frosterley and Wolsingham the Drift is of the same 
general type as that occurring higher up the Dale, but sections are 
not so plentiful. Opposite Harperley Station the river has cut 
through Boulder-Clay to a depth of 20 feet; the boulders are all 
such as occur in situ in Weardale. Below Harperley are wide 
‘ garths,’ which occur alternately on the right and left banks of the 
river. These ‘garths’ are flanked by wooded slopes of Boulder- 
Clay, often of considerable height. 
There are no good sections of the Drift to be seen, until a point 
about a mile above the bridge at Witton-le-Wear is reached. Here 
the river has exposed a section of Boulder-Clay and gravel 60 feet 
thick, and is still running in Drift: this is on the left bank. The 
railway also cuts through the mass of Drift, but the sides of the 
cutting are sloped and grassed over. On the hillside above: this 
point is a large quarry in Carboniferous sandstone and shale, and 
also a heading driven into the Whin Dyke which crosses the valley 
at this point. In neither of these sections is any Glacial material 
to be seen. 
At Garth Ford (66), above the bridge at Witton-le- Wear, and on 
the right bank of the river, is a cliff of Drift consisting of 40 feet 
of blue Boulder-Clay, with a capping of gravel 20 feet thick. The 
gravels are much waterworn, the stones in the Boulder-Clay being 
subangular and sometimes striated. They consist of Carboniferous 
Limestone and Gannister, many being of very large size. I found 
one piece of andesite from the Borrowdale Series i situ in this 
clay. 
In the bed of the Wear at Witton Bridge are boulders of basalt, 
Coal-Measure sandstone, Gannister, Millstone Grit, Carboniferous 
Limestone, and brown shale with encrinite-stems. I also found one 
piece of a close-grained green andesite, belonging to the Borrowdale 
Volcanic Series. 
The following tributary valleys contain Drift consisting entirely 
of local material, namely :— 
Right Bank: Grain Beck, Swinhope Burn, Westernhope Burn, and 
Bollibope Burn. 
Left Bank: Middlehope Burn, Rookhope Burn, Stanhope Burn, and 
Wascrow Beck. 
In the valley of Bedburn Beck the Drift is much more gravelly 
than in any of the preceding, and furthermore it is of a red colour 
