W. B. Dwight on a Boulder and Glacial Scratches. 11 
The locality is situated on the top of the Palisades, about 100 
rods from the brow of the precipice that faces the Hudson 
river, and about 450 feet above the level of the river. It is on 
the premises of Francis Howland, Esq., fifty rods to the rear 
of the residence of Mr. Wm. B. Dana; and as its proprietor is a 
man of much public spirit, we may feel assured that it will be 
carefully preserved. ‘The monument with its inscriptions has a 
vastly greater antiquity than those of Assyria or Egypt. 
e boulder rests upon the trap rock. It consists of coarse 
red sandstone, and is from the triassico-jurassic formation 
which the trap-dike of the Palisades intersects. This sandstone 
1s the surface rock for a large extent of country to the west and 
north. In the latter direction it extends thirty miles to Stony 
Point, and this is therefore about the extreme distance which, 
judging from the present limits of the formation, can be assigned 
for the passage of the boulder. 
The general level of the sandstone in the vicinity is from one , 
to two hundred feet below the summit oftthe trap, and none of 
the sandstone is in position within a mile and a half of the 
ocality 
