WI k?ndi!e AND 1 CORRELATION OF CERTAIN SECTIONS. 129 
beds, but no single section shows more than two of them. Beds of 
similar character, but with a lower grade of ore, occur at the same 
horizon near Lero} T . 
The limestone facies represented in most of the sections of western 
Bradford County below the ferruginous sandstone and ore beds by 
the limestone of the Franklindale beds has almost entirely disappeared 
in the Tioga sections. It appears to be represented, however, at a few 
localities by a thin bed of limestone composed of shell fragments. A 
bed of this character not now exposed, which is said to be 5 or 6 feet 
in thickness, occurs in the hill 1 mile north of Mansfield. In the 
southeast corner of the county this limestone outcrops 2 or 3 miles 
east of Roaring Branch, along the Lycoming Creek wagon road. 
While the Franklindale beds have thinned almost to the vanishing 
point west of the Tioga-Bradford county line, the iron-ore beds, which 
at Lero}^ accompany and lie above the Franklindale beds, have become 
more pronounced and cany a higher grade of ore. The peculiarities 
of the different ore beds are not sufficiently marked, either paleonto- 
logically or lithologically, to enable one to correlate with confidence 
the individual ore beds of the Mansfield region with those of the Leroy 
region; but that the Mansfield ore beds and intervening strata, as a 
whole, should be correlated with the ferruginous sandstones and ore 
beds at Lero}^ is indicated b} 7 the following considerations: 
(1) The highest ore bed lies approximately at the same distance 
oelow the upper limit of fossils at Leroy and Mansfield. 
(2) The iron ores and their associated strata represent the first 
appearance of red sedimentation in both districts. 
(3) A limestone which is apparently the equivalent of that at Leroy 
is present at some localities in the ore-bed sections of the Mansfield 
region. 
COMMENTS ON THE FAUNAS OF THE TIOGA, MANSFIEL.D, 
AND CANOE CAMP SECTIONS. 
By H. S. AVilliams. 
There are some interesting facts regarding the faunas associated 
with the red beds and iron-ore deposits in the eastern part of the 
Tioga quadrangle. 
In each of the three sections examined in detail (Mansfield, Canoe 
Camp, and Tioga) there are two faunas which occur in succession, 
lapping a little, but in the main distinct in composition. This is 
shown b}^ the following analysis of the faunas: 
The first point noticed is that Strophonella cselata is conspicuous in 
the earlier zones of each section, while Athyris angelica is dominant 
in the higher faunules, and these two species do not occur together in 
