Mr Hufjli Miller on the Geology of the Silloth Doeh 339 



Dock," ^ I also have pleasure in acknowledging my indebted- 

 ness. Occasional notes on the same subject have been 

 published in the same volume (p. 214) by my late colleague, 

 Mr T. V. Holmes, F.G.S., chiefly communicated to him by 

 Mr Goodchild. 



The entire section consisted of superficial deposits, yIz., a 

 thick foundation of red boulder-clay below, penetrated to a 

 depth of 30 feet without signs of rock ; and recent marine 

 deposits above, originally about 30 feet thick, and covered 

 over with blown sand. The following represents the full 

 section from the original surface to the bottom of the dock 

 — which is on the mean low-w^ater level of ordinary spring 

 tides : 



Feet. 



5. Blown sand, previously removed; partly re-de- 

 posited by the wind while the excavations were 

 in progress, . . . . . — 



4. Sea sand and fine shingle, intensely current-bedded, 

 containing waterworn fragments of recent shells, 

 and some lumps and thin layers of drifted peat. 

 Mammalian bones in lower part, originally 29 



3. Shell-bed ; a dark and fetid-looking mash of gravel 

 and mud. Shells unbroken; valves sometimes 

 together. Large stones with some oysters ad- 

 herent, and crusted with serpula and corallines 

 (Zepralia), .... about 1 



2. Unconformity, . . . . . — 



1. Gritty red boulder-clay or gravelly till ; and, in the 

 south-east corner of the dock, laminated brick 

 clay, ...... 10 



The till was the ordinary boulder-clay of the lowlands, 

 coloured Indian- red by the red rocks of the district; partly a 

 gritty clay, partly a clayey gravel; and containing a great 

 variety of boulders not necessary to name here. A number 

 of the boulders had been finely glaciated atop in situ, and 

 some excellent illustrations presented themselves of the 



^ Trans. Cumberland and Westmoreland Assoc, No. ix., 1883-84, p. 169. 

 VOL. VIII. Y 



