362 HENRY B. KUMMEL 
such an essential character as to indicate a separate immigration from 
the exterior into this region.'. As indicated above, south of Hainsville, 
a thin sandy bed intervenes between the Coeymans limestone and the 
New Scotland beds and gradually replaces the latter. At Flatbrook- 
ville, where these strata cross the Delaware into Pennsylvania, the 
lower cherty limestone member of the New Scotland beds has dis- 
appeared, and the Stormville sandstone contains a fauna characterized 
by Spirijer macro pleurus. 
Becrajt limestone—A hard, gray, cherty limestone overlies the 
shaly layers of the New Scotland beds, forming a resistant layer 
which outcrops frequently along Wallpack Ridge. Its entire thick- 
ness has never been observed, but it is estimated to be about twenty 
feet. Its fauna is closely allied to that of the New Scotland beds, 
a few new forms appearing and a few old ones disappearing. ‘There 
is also some difference in the proportionate number of individuals 
of some species, notably of Leptaena rhomboidalis which becomes 
especially abundant. The bed is correlated with the Becraft lime- 
stone of New York. 
Kingston or Port Ewen beds.—A series of strata, nowhere exposed, 
occupies the interval between the Becraft limestone and the base of 
the Oriskany. They are probably shaly beds which easily disintegrate 
and thus become covered with débris. ‘Their thickness is roughly 
estimated as eighty feet. The only basis for their correlation is their 
position which corresponds to that of the Port Ewen (Kingston) beds 
of New York. In Pennsylvania, the same beds have been called the 
Stormville shales by White.’ 
Oriskany formation.—A series of strata, aggregating about 170 
feet in thickness, succeed the Port Ewen beds and are referred to the. 
Oriskany. They are for the most part siliceous limestones, but the 
summit of the formation along the southern half of the Wallpack 
Ridge becomes a sandstone. The arenaceous facies is said to become 
more marked to the southwest in Pennsylvania and to embrace lower 
and lower beds until all the strata to the top of the Coeymans lime- 
stone are sandstones. The fauna of the Oriskany beds in New 
Jersey comprises three well-defined faunal zones, the lowest character- 
t Weller, N. J. Geol. Survey, Paleontology, Vol. III, p. go. 
2 Second Geol. Surv. Penn., Rep. G 6, p. 131. 
