I. C. Russell—Triassic Trap Sheets of New Jersey. 279 
were at one time inclined to suppose, before the sandstones and 
shales above them were deposited, then, of course, the rock 
ain, 
Jersey, and near the little deserted village of Feltville, the de- 
sired junction is very plainly shown. We there found one 
page of the history of the Triassic formation clearly legible. 
At this locality the stratified rocks are well exposed in the 
sides of a deep ravine which has been carved out by a smal] 
brook that flows down the western slope of the mountain. 
overlying rocks. The outside of these masses present a scorla- 
ceous or slag-like appearance; in the interior the cavities are 
filled with Re illtchted misenia The shales that rest directly 
have been intensely metamorphosed, and are scarcely to be dis- 
tinguished from the trap itself In hand specimens It 1s fre- 
quently impossible to determine from their appearance alone 
which is trap and which is metamorphosed shale. Ata distance 
of six or eight feet above the trap the shales are still very much 
é ightly, if at 
trap, the shales and sandstones are changed but slightly, if at 
all, from their normal condition. A bed of limestone teh bs 
to three feet in thickness, which is here interstratified with the 
shales and sandstones—a very rare occurrence In the Triassic 
