252 Dr. Berger on the Geology of some parts 



at this latter place the chalk is first to be found in s'ltu^ at the distance 

 of fifty-seven miles from the metropolis. We lose the chalk in the 

 neighbourhood of Otterborne, five or six miles to the S. S. \V. 

 from Winchester, where we enter again into a loam mixed with 

 flint gravel. In the Isle of Wight, the same flint gravel in loam 

 occurs near Marsh Green in Brixton Bay, not far from the chalk 

 hills called Brixton and Mottiston Downs. 



The heath, which extends from Christchurch town to Pocle, a 

 distance of eight miles, has for its bottom the same flint gravel 

 either in sand or in loam. It forms also the upper part of the 

 cliffs in Christchurch Bay by Milford, Hordel, &c. 



The flint pebbles found in this formation are rounded and much 

 smaller than those which are imbedded in the chalk ; they have no 

 coat, but on the contrary, a sort of semi-transparence approaching 

 that of amber. They have in all probability been worn by the sea. 



II. Qtiartzose loose Sand. 



It is always strongly impregnated with oxyd of iron ; it presents 

 sometimes all the varieties of colour imaginable, white, ochre-yellow, 

 brownish-red, pink, green and black, but in all these instances the 

 iron seems to be in a state of peroxide, as none of the rocks which 

 the sand forms, act at all on the magnet, though the considerable 

 quantity of this metal which they contain is readily shewn by the 

 application of chemical solvents. 



This sandy formation is to be met with in the Isle of Wight on 

 the southern boundary of the chalk from Shorwell to Chale, but es- 

 pecially in Alum Bay, where it makes high, precipitous and very 



