110 THE HAWKESBURY SANDSTONE. 
not account for the presence of pebbles of jasper, vein juar 
slate, and of numerous other materials such as we findi 
or of ferruginous and sandstone pebbles, i.e., they wo 
more or less hardened form mixed with ironstone ; in fact, 
blocks of stone of which the Druidical temple of Stonehenge 
built consist merely of masses of sand converted into quaraite a 
afterwards set free by the removal of the loose Eocene sand 3 
which they were originally surrounded. ne 
In summing up, Mr. Tenison-Woods states that “the aoa 
cliffs of the Blue Mountains are the hard central cores of sands 
the loose portions of which have been easily blown or washed away: — 
I think that there are a great many difficulties in the way ft 2 
explanation. The Haw kesbury sandstone seems to at . 
fairly uniformly deposited over its whole area, and I still thus 
that the mountains are mountains, because the matter which he 
filled up the valleys and connected cliff with cliff has sine 
Seooped out by the action of the weather and running water 
as I have said before, I wish to again examine these rocks 
the new light which Mr. Tenison-Woods has thrown upon the oe 
ject of their probable origin. ’ 
ore concluding, I should like to state how much g 
T have derived from Mr. Tenison-Woods’ paper, to 
tions of this kin 
Tied on. 
to be the origin s, I am sure that a full 
the question will serve to elucidate 
