ei:i;atio blocks of the British isles. 103 



has recently occurred as a result of the covering deposits having been 

 removed by the changes in the course of the Humber waters. This 

 exposure reveals the pre-glacial bed of the Humber estuary, and it is 

 interesting to observe that this also is striated in the same direction as 

 the strise on the cement-nodules already referred to. 



Reported by the Northumberland and Durham Boulders Committee of 

 the University of Durham Philosophical Society. 



1. Collected by S. E. Haseliiurst. — Percy Square to Spanish 

 Battery, Tynemouth : Basalt, amygdaloidal with large crystals of 

 anorthite ; volcanic series of Borrowdale ; red sandstone ; syenite ; 

 porphyrite (St. Abbs Head); micaceous sandstone. 



2. Collected by E. Merrick. — 



(a) Cowpen Brick Works (late Standard Brick Works) : Bed 

 fossiliferous Carboniferous limestone; syenite; andesite; porphyrite; 

 three boulders of chalk. 



(b) Sand Pit, South View, R3"ton : Red granite ; volcanic series of 

 Borrowdale; ferruginous grit; Threlkeld granite. 



(c) Brick's, Ltd., Forest Hall: Bed porphyrite. 



3. Collected by Dr. Woolacott and E. Merrick. — From founda- 

 tions of new buildings for Art Department, Armstrong College : Carbon- 

 iferous limestone ; whin sill ; volcanic series of Borrowdale ; rhyolite 

 1 cubic foot; grey granite (Dalbeattie); sandstone. 



4. Collected by Dr. Woolacott and G. T. Mackay. — -A boulder of 

 decomposed Laurvik syenite or similar rock from Christiania Fiord 

 was observed on the coast about a mile north of Castle Eden. 



5. Collected by A. Ball. — A piece of Laurvik syenite from 

 Christiania was collected from the foundations of bridge across Castle 

 Eden Dene. 



(Note. — The two latter boulders, probably of Scandinavian origin, 

 are of great interest as being the most northerly recorded occurrence 

 of Scandinavian rocks in the English drift.) 



6. Collected by Dr. Smytiie. — (a) Pebble bed, Horsebridge Head, 

 near Newbiggin. Besult of many years' collecting. 



Sedimentary. — Sandstone, commonest constituent, often con- 

 taining plant remains (Lepidodendron, Calamites); Magnesian 

 limestone abundant (one specimen with Fenestrella rctiformis); 

 Carboniferous limestone, not common, fossils often occur (Pro- 

 ductus, Lithoslrotion); Greywacke, not common ; chalk flints (6); 

 chalk (1) ; cherts and jaspers (22). 



Igneous and mclamorphic. — Whinstone, fairly common, 

 pebbles up to 1 foot; of 210 other rocks there were 30 granites, 

 white, grey, red, up to 6 inches; 20 mica and hornblende schists 

 up to 8 inches; 56 porphyrites (many certainly from Cheviots); 3 

 glassy porphyrites and 4 andesites (Cheviots) ; 15 quartz porphyries 

 with white, pink, green, and red groundmass, up to 6 inches; 

 17 syenites; 3 mica porphyrites; 1 diorite; 61 weathered rocks, 

 mostly porphyritic. 



