192 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Mar. 10, 



Chert, in large angular blocks. 



Mountain Limestone (one angular block weighing 2 tons). 



Black Marble, in large boulders. 



Coarse Sandstone and fine-grained micaceous Sandstone. Copford. 



Black Slate, in angular fragments. 



Quartz-rock and grauwacke. Copford. 



Coarse-grained Quartz-rock, with mica. 



Basalt. Copford. 



Felspar-porphyry, large angular masses. 



Syenite, large rounded masses. 



List of Fossils from the Till of the Eastern Counties'^. 



Elephas ; tibia, right and left ischia, symphysis of lower jaw, molar 



teeth of lower jaw (young and adult). 

 Equus ; phalangeal bone. 

 Vertebrae of Saurians (Stour Valley). 

 Ammonites serratus (Stanway, Stour Valley, Hartest). 



rotundatus (Hartest) . 



biplex (Suffolk). 



dentatus 



Lamberti 



ZZBleriL- HSto- Valley.) 



Gowerianus ? 



annularis J 



Gryphsea incurva ; Lias 



Pecten ; Lias )> (Stour Valley.) 



Spatangus; Chalk 



] 



It is a peculiar feature of the Till in this county, that it contains 

 interrupted beds and small masses of gravel, consisting of rounded 

 and angular flints, sandstone, and other rock-fragments, imbedded in 

 greyish sand ; which colour is peculiar to this gravel. We find such 

 a gravel underlying the Till at Kelvedon, Thaxted, and Ballingdon 

 (in the latter place the beds are highly inclined, — false-bedded), and 

 at Muswell Hill near London ; and, in my opinion, the gravelly sand 

 underlying the blue calcareous clay of the Copford Brick-field, above- 

 described, may be referable to this grey gravel- The masses of this 

 gravel are so limited, that five pits have been exhausted in the course 

 of twenty years, in obtaining materials for mending the roads, in the 

 parish of Copford alone. 



The red gravel in the adjoining parish of Stanway forms an enor- 

 mous mass, several miles in length towards the east, more than a 

 mile in width, and in some places 60 feet in thickness ; and being 

 red, is different in colour to the gravel in the Till. Not knowing 

 whether the interrupted beds of grey gravel in the Till extend to 



* See also Woodward's ' Geology of Norfolk,' pp. 39 et seq., and some of the 

 figures of fossils in R. C. Taylor's • Geology of East Norfolk.* 



