382 
THE GEOLOGIST. 
grained saud was met, 30 feet in thickness ; the sand, when dry, 
was of a greyish white. Then followed a bed of clay, red, blue, and 
yellow, 10 feet. At 170 feet, a most interesting bed of grit and clay, 
of a light green, was found, with many fragments of Paludinae iden- 
tical with those of the Wealden clays elsewhere. At 10 feet below 
this, a stratum of hard limestone gave great obstruction to the boring. 
This bed, from an inspection of two small fragments, I believe to be 
a layer of the Bethersden marble, containing Paludinas of much 
smaller size than those of the clay above. About 45 feet of very 
compact brown sands now gave great opposition to the auger, as the 
friction wore its edge rapidly away. Mottled clay, red and white, 
sometimes streaked with much regularity, was next pierced for 5 
feet, and a second brown sand passed through for 40 feet. A bed of 
blue clay, with crushed shells, to the extent of 90 feet, was now bored 
into, and a supply of water was considered to have been met with ; 
but the quantity was not large, and the water was turbid. The total 
depth sunk was 360 feet. 
Several other borings have been begun at various places, but have 
not been gone on with to a depth sufficient to pass through the 
AYeald clay. The marine blue clay (Atherfield) I have noticed as 
far from the cropping out at Teston as the north-west side of the 
town ; and opposite the depot, and close to the river, a depth of 50 
feet of blue clny was entered by a railway surveyor. 
At Turkey Mill (AYhatman's) a blue clay was found near the sur- 
face, in the valley, with a layer of Paludinse a foot in thickness, very 
compact, ti^e shells belonging to a very small species. This locality 
is at least five miles from the escarpment of greensand at Linton. 
{To he continued.) 
GEOLOGICAL XOTES IN THE GREAT EXHIBITION. 
Canada. — The collection of specimens of rocks and minerals from Canada, 
exhibited by the Government Geological Sm-vey, is, as a practical and com- 
plete industrial collection, unequalled by an}" other mineral collection in 
the whole Exhibition ; and the catalogue of 90 closely printed pages which 
accompanies them is a masterpiece of its kind, and well worthy of its 
eminent and indefatigable author, JSir TS'illiam Logan. Besides the col- 
lection of specimens, the published geographical and geological maps, the 
palseontological books and plates, and the printed reports of the survey are 
also exhibited. From the index to ihe geological maps we get, of course, 
the recognized geological groups of rocks and the order of their succession. 
So far as this index at present goes, it does not carry us higher than the Car- 
boniferous series. Of the mineral specimens, amongst the metals and their 
ores the most remarkable are those of the bog-iron ore from Kadnor Forges, 
BatCwScan; deposits of bog-iron ore of alluvial age are spread out, in greater 
or less abundance, from the north side of the St. Lawrence, and between 
it aDd the Lawrentide HiUs, all the way from St. Anne des Plaines to 
