1894. ] NEW YORK ACADEMY OF SCIENCES. 15 
me the existence of a small but well marked fold, involving a 
displacement of two or three feet, in clay strata on the road 
between Sayerville and New Brunswick, but I failed to find it, 
after a trip to the locality with that special object in view. It 
may also perhaps be pertinent to remark in this connection that 
a* phenomenon which simulates the folding of plastic strata 
may often be seen where gneissic rock has decayed in place, but 
the two phenomena would not be confounded by anyone who 
had seen and studied both. 
As to the dip and strike of the disturbed strata, in the few 
localities where observations have been possible, I am forced to 
admit that they are too erratic to be of much stratagraphic 
value. They vary in the most eccentric manner, but there is a 
prevailing strike coinciding with the trend of the moraine, and 
Fic. 4. OVERTHRUST FOLD UNDER TERMINAL MORAINE, CLIFTON, 
STATEN ISLAND. 
the strata are either bent into overthrust folds or tilted, with the 
dip towards the north. North and south anticlines are common. 
A particularly fine example of the overthrust fold was exposed 
at Clifton, Staten Island, some years ago, in an excavation made 
on the edge of the moraine for building 2 gravel (see Fig. 4). 
On Long Island the hills on the north shore are much broken 
up by the numerous inlets and harbors which extend to a 
greater or less distance inland. On the east and west sides of 
these harbors there are several limited exposures, and these 
present sometimes the faces, sometimes the edges of the strata 
to view, and the dip is as often east or west as north or south. 
