... 12ft. 



Oin. 



... 1ft. 



Oin. 



... 4ft. 



Oin. 



md) 2ft. 



Oin. 



... 2ft. 



Oin. 



... 4ft. 



Oin. 



ise 5ft. 



Oin. 



5ft. 



Oin. 



2ft. to 3ft. 



Oin. 



2ft. 



6in. 



2in. to 3in. 





3ft. 



Oin. 



3ft. 



Oin. 



5ft. to 6ft. 





2ft. to 20 ft 





254 W. A. E. Ussher — Pleistocene Geology of Cornwall. 



B. In the centre of Pendelow Vale. 



a. Granitic sand and gravel 



1. Silt (vegetable matter ?) 



2. Granitic sand 



3. Vegetable matter (like No. 5 in otber sections, but with sand) 



b. Silt, sand and gravel mixed 



4. Vegetable matter (like No. 5 in otber sections) (Fen) 



5. Tin ground, ore not abundant, most plentiful near tbe base 



C. Watergate. 



a. Mud witb granitic sand and gravel 



1. Fine granitic sand 



2. Silt (witb decayed vegetable matter ?) 



3. Fine granitic sand 



4. Silt (resembling No. 2) 



b. Silt, sand, gravel, and large stones, indiscriminately mixed 



5. Vegetable matter passing into silt in tbe lower part (like 



Nos. 5 and 6 in tbe Merry Meeting section) 



c. Tin ground; tbe ore occurs as sand and pebbles 



D. Broadwater, Luxillion. Tin ore much larger towards the sea 

 than up the vale. A patch of slate some hundreds of feet in area 

 was found resting on tin ground, and apparently unconnected with 

 the shelf. 



a. Granitic sand 6ft. to 7ft. Oin. 



b. Mud, apparently of vegetable origin, mixed witb granitic 



sand and gravel 4ft. to 5ft. Oin. 



c. Tin ground; ore, small pebbles not mucb rounded ... 7ft. Oin. 



The tin bed is sometimes divided by a bed of granite (cap shelf) 

 as at Grove and Merry Meeting. Numerous blocks of quartz lie on 

 the shelf. Below the shelf (soft granite) tin ore is not abundant. 



The following are from Journ. B. Inst. Corn. vol. iv. p. 214 : — 



E. Levrean in St. Austell's parish. 



1. Granitic sand and gravel 1ft. Oin. 



2. Peat (Fen), often mixed witb, and sometimes divided 



by, very tbin layers of granitic sand 1ft. Oin. 



3. Granitic matter, particles and granules of tin, rarely 



minute specks of gold (Upper Tin Ground) 3ft. to 6ft. Oin. 



4. Angular and subangular masses of granite in granitic 



sand witbout any tin ore (False Sbelf) lft. to l^jft. Oin. 



5. Tin ground ; angular and subangular granite, felspar, 



quartz, scborl, veinstone materials mixed witb 

 granitic gravel and sand, grains and particles of tin 

 oxide, and less frequently flakes of scbistose matter 

 witb specks of gold. A few ancient sbovels of 

 wood, bound on tbe edges witb iron, bave been 

 found in tbis bed. Tbe sbelf is of granite of 

 unequal bardness 10ft. to 15ft. Oin. 



F. Pit Moor in St. Austell's Parish. 



1. Vegetable mould lft. Oin. 



2 and 3. Granitic detritus in many layers 5ft. to 6ft. Oin. 



4. Tin ground; angular, subangular, and rounded 



masses of granite, quartz, schorl, veinstones, small 



quantities of tin ore ; clay-slate laminae, occasional ; 



on soft granite shelf 3ft. to 1 Oft. Oin. 



G. Upper Creamy (Wheal Prosper). 



1. Peat _ ... ._ Oft. 6in. 



2. Granitic clay, often mixed witb laminre of yellowisb slate lft. to 3ft. Oin. 



3. Tin ground; small angular and rounded granitic and 



