Geology and Mineralogy. 329 
that the dip of the sandstone is in opposite directions in the tw 
areas—10° to 15° northwestward in New Jersey, 5° to 50° esi 
the consideration of faults in the beds being rejected by the author 
as without “ plausible” ort. 
The hypothesis has Shsjeeeibie some of which, as they appear 
to the writer, are here stated. 
(1) A thickness of 25,000 feet of te ere sandstone over an 
level, implies a subsidence of this region of over 25,000 ee during 
the formation of the sandstone, or else, et depth ‘of wa 
(2) It implies also an elevation of the whole maiouranee miles 
wide between the eastern and wedliees limits—not only to this 
amount, 25,000 feet, but enough higher to give < > average pitch 
of 15° eastward in the eastern sandstone and 10° to 15° in the 
Sint For a width in the Connecticut Valle se fifteen miles 
rea ght twenty), the dip produced by the alleged up- 
lifting if only 14 °—supposing no faults—would put the western 
side of the Connecticut Valley 20,000 feet above its eastern; and 
the site of New York City, on the eastern 15,000 or 20,000 feet 
present — are mall i in compari 
(3) se Apa are asks tor an ‘Anatediiile amount of denuda- 
tion; crystalline rocks of great depth as well as sandstone, over 
n area more than fifty miles wide having to be removed, and the 
surface brought down to its present level. 
(4) The southern Kimit of the parece Valley sandstone 
area is north of the northern limit of perv w Jersey. The a 
Jersey area cannot, therefore, be on oppeeise margin of t 
Sandstone region to that of the Conaestanes Valley. That tees 
Should have been an opposite side to the Connecticut ewe anti- 
clinal, the New Jers rsey ‘Trias tees have extended up the Hud- 
son River to Albany, N. Y., 120. miles north of its most northern 
western 
Massachusetts as well as of Connecticut, and all of Eastern New 
-—_ south of Albany, — the Green Mountain region, 
must have been raised to the enormous altitude referred to; and, 
besides, the sandstone must ave since been removed from the 
whole inca no trace was left, with the exception of the South- 
bury a“ asin. Further, the opposite side of the New Jersey part of 
the arch ise have been somewhere out in the Atlantic south of 
