ERRATIC BLOCKS OF THE BRITISH ISLES. 173 
(1) From boulder clay, Benton Loop, North-Eastern Railway, near 
Nevreastle :— 
Volcanic series of Borrowdale. 
(m) From clay, Leam Head, Springwell, near Gateshead :— 
Threlkeld granite (two boulders, one of them 1 cubic foot in volume). Whin 
Sill. Volcanic series of Borrowdale. 
(n) From clay, Moss Heaps, Wrekenton, near Gateshead :— 
Granite. Greywacke. 
(iv.) Reported by Rev. W. J. WINGATE. 
Volcanic ash of volcanic series of Borrowdale found near Crook, and Threlkeld 
granite found at Bishop Auckland. 
(v.) Reported by Mr. A. BELL. 
Volcanic series of Borrowdale at St. Helens, near Bishop Auckland. 
BovuLpERS COMMITTEE. 
Report No. 3. March 1909. 
The following boulders and pebbles have been collected and determined 
by members of this Committee since the last report was issued :— 
(I.) From boulder clay, Keaton, near Neweastle. Collected by 
R. C. Burton, G. Weryman, and the members of Armstrong College 
Geological Surveying Class :— 
Dark fresh porphyrite (Cheviots ? 5 cubic feet). Threlkeld granite (4 cubic 
foot). Several pieces of volcanic series of Borrowdale. Cheviot granite. 
F Grey granite (Criffel?). Basalt (several). Shale with cone-in-cone 
structure (several). Carboniferous limestone (numerous). Red con- 
glomerate. Clay ironstone. Septarian nodule. Sandstone. 
(II.) From Grindon Kaim, near Sunderland. Collected by Dr. Woora- 
corT. 
Pebbles, mostly small, with one or two exceptions all less than 4 cubic foot. 
Cheviot granite. Red granite. Borrowdale volcanic series (numerous). 
Magnesian limestone (very numerous)—some specimens of the cannon- 
ball and other concretionary types. Quartz pebbles. Greywacke 
(several). Felsite. Carboniferous limestone. Felspathic grit. Coal. 
Shale. Sandstone. Quartz porphyry. Purple porphyrite (Cheviots). 
Tronstone. Whin Sill. Basalt. 
Some of the stones were scratched. An incipient cementation occurs in places 
(III.) From boulder clay, small quarry behind Claxheugh, near 
Sunderland. Collected by Dr. Smytue and Dr. Wootacorr. 
Cheviot porphyrite. Cheviot felsite. Basalt. Carboniferous limestone. 
(IV.) Tyne Quarry, Walker, near Newcastle :-— 
(a) From ‘rag’ or ‘ mixture clay.’ Volcanic series of Borrowdale. Basalt. 
ee red granite. Sandstone. Carboniferous limestone (5 cubic 
eet). 
(b) Lying loose. Volcanic ash. Schist. Volcanic series of Borrowdale (5,' 
one 1 cubic foot). Greywacke (2). Granite (red and grey). Threlkeld 
granite (3). Quartz felsite (2). Cheviot porphyrite. Granite (Criffel ?) 
(2). Red grit. 
' The numbers placed after some of the specimens refer to number of that rock 
noted. The size of the specimen is given wherever it is noteworthy. 
