ON ERRATIC BLOCKS OF THE BRITISH ISLES. 4.01 
Quarry at corner of road Lealholm to Stonegate.—625 O. D.— 
Carboniferous chert, Magnesian limestone, Millstone Grit, quartz-porphyry 
(? Elfdalen). 
Stonegate, old railway cutting near bridge.—560 O. D.— 
Sparagmite (?) sandstone, porphyrite, basalt, granite, quartz-porphyry, 
andesite, andesitic ash and breccia, Carboniferous chert (two specimens), 
Carboniferous limestone (one. specimen), Millstone Grit (4 specimens), 
Carboniferous basement conglomerate, of Roman Fell type (one speci- 
men), flint, jasper, Poikilitic sandstone, Old Red Sandstone (?), gneiss, 
hornblende-schist (two specimens), quartzite with pebbles of mica- 
schist, vein quartz, The matrix consisted largely of fragments of Upper 
Lias shale. 
Another cutting near Wood Hill House contained a similar assemblage 
of stones, but Magnesian limestone, with botryoidal structure, was very 
abundant, and a specimen of Middle Lias, with Pecten equivalvis, was 
found. 
Commondale, near Skelderskew Farmhouse-—560 O. D.— 
Porphyrite, grey grit (? Sparagmite), hornblende-schist, Shap granite. 
Iburndale, 250 yards north of Throstle Nest.—80 O. D.— 
Shap granite. 
Lburndale, path above New May Beck.—675 O.D.— 
Granite, porphyrite. 
West Rigg, near Lockwood Reservoir.—810 O. D.— 
In Boulder-clay: Flint, porphyrite, grit (? Sparagmite), quartzite, basalt, 
coarse felspathic grit, andesite, Carboniferous chert, schist, granite, 
1 Rhomb-porphyry found by Mr. J. W. Stather im situ in the Boulder- 
clay. 
Danby, at junction of Ewe Crag Beck and Black Beck.—625 O. D.— 
Porphyrite, granite, Rhomb-porphyry. 
Peak Station.—650 O. D. In gravel— 
Gneiss, porphyrite, granite, basalt, ophitic dolerite, flint (some black), 
Magnesian limestone (resembling that near Sunderland), vein-quartz, 
quartzite, sandstone (? Sparagmite), blue-green felspathiec grit, Triassic 
sandstone, Millstone Grit (two specimens), quartz-porphyry (? Elfdalen), 
jasper, hornblende-schist, andesite. No Carboniferous limestone or 
Lias observed. 
Peak, on Moor near Green Dike.—825 O. D.— 
Quartz-porphyry, porphyrite, granite, basalt, flint. 
Danby, near Doubting Castle.—725 O. D. 
Porphyrite, granite, flint, basalt. 
Seavy Slack, Eastington High Moor.—700 O. D.— 
Gneiss, Rhomb-porphyry. 
Ainthorpe, near Danby, in field north of Schoolhouse.—500 O. D.— 
Porphyrite, Lake District volcanic ash. 
Great Ayton, Rye Hill Gravel Pit.—425 O. D.— 
Porphyrite, very abundant and greatly preponderating over all other non- 
sedimentary rocks together. Millstone Grit (rare), Carboniferous lime- 
stone and chert (very rare), Lower and Middle Lias, Triassic sandstone, 
Jurassic grit, Magnesian limestone, flints (both black and brown). 
1899. DD 
