382 



THE GEOLOGIST. 



grained sand 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 Paludinse 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 Paludiuse 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 w^hite, 

 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, w^as now bored 

 into, and a supply of water was considered to have been met with ; 

 but the quantity w^as not large, and the water was turbid. The total 

 depth sunk w'as 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 

 Weald 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 clay w^as entered by a railway surveyor. 



At Turkey Mill (Whatman's) a blue clay was found near the sur- 

 face, in the valley, with, a layer of Paludinse a foot in thickness, very 

 compact, the 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 NOTES IK THE GEEAT EXHIBITION. 



Canada. — The collection of specimens of rocks and minerals from Canada, 

 exhibited by the Government Geological Survey, is, as a practical and com- 

 plete industrial collection, unequalled by any 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, Sir William 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 the 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 Eadnor Forges, 

 Eatescan; 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 ard the Lawrcntide Hills, all the way from St. Anne des Plaines to 



