dedetiiiesibaitaitintes 
Rise 3 
Pets nai: ue 
Sandstone of the United States. 211 
The working of the quarry below this is interrupted by 
water. 
The following are some of the varieties which occur at 
these mines 
4 Grayish apie fine tigi: Sandstone. 
. Brown do. 
: Vermilion red “ do. 
- Sandstone containing nodules of - indurated marl, some- 
times called clay galls. 
5. Conglomerate with pebbles 
6. asae with greenish paths, and containing decom- 
pea felds 
satietnie divided into thin plates by shining lamine of 
a 
mar 
8. "Sandstone, grayish white with red spots, 
9. res dark gray, brownish yellow, and various 
shades o ‘ 
In some parte of the quarry are found grayish white mica- 
ceous sandstones, containing vegetable impressions, with the 
bark converted into coal. 
Some of the Sandstones contain small crystals and plates 
of green carbonate of copper, others have on their surface 
illinitions of manganese. 
Copper mines are: now opened in this formation, 4 Belle- 
ville, Somerset t, and Bridgewater, New euiaté e lead 
and slaty Sandstone, and indurated m 
Atthe rocks, near the Delaware, ten fail South of Easton, 
Pa., the second Sandstone forms abrupt precipices, in man 
places, Sm iste posed, and presenting the appearance of 
massy colum 
The RED upon which the trap rocks (the newest flatz 
trap of European geologists) repose at Patterson, is second 
or variegated Sandstone. 
accompanied Professor Renwick, on a visit to Passaic 
Falls, and that gentleman coincided in this opinion, Pro- 
fessor Akerly, of New-York, has, I believe, expressed a 
similar idea in one of his publicatt sas. 
Beneath the Palisadoes, or trap rocks, on the shores of the 
river Hudson, is a sandstone which belongs to this class, 
