1.62 The American Geologist. March, 1894 
lella crassa was found, east of the southwest opening and 
near the Furnace pond. Along this line of strike, for a dist- 
ance of nearly one mile, the transition from blue to white 
limestone may be noted at points where the rocks are hare of 
soil. 
This line of transition can be traced at intervals onward 
for a distance of eight miles. Sometimes the transition 
is as above described, at others the meeting point of the two 
lines is marked by a brecciated zone where the fragments are 
more or less metamorphosed. One of these localities is to be 
noted by the roadside just east of Hardystonville hotel and in 
front of a small house. In front of the hotel, in the bed of a 
brook, the same brecciation may be observed. Near b} r is the 
blue limestone, and in the decomposed sandstone were found 
burrows of Scolithus and heads of the Olenellus, with the head 
plates replaced more or less completely by graphite. 
From the first of the above mentioned localities a selection 
of specimens for analysis was made.* 
"). 6. 7. 8. 9. 10. 
Insoluble.... 0.81 0.01 0.88 1.24 10.92 0.50 
CaC0 3 55.62 99.05 57.58 55.72 48.13 56.05 
MgCO ;J 35.52 2.00 27.18 44.62 20.34 35.34 
Totals... 91.95 101.09 85.61 101.58 79.39 91.89 
Specimen No. 5 is from a banded, ribbon structure, blue limestone 
fragment. 
No. 6, a bluish gray fragment. 
" 7, coarsely crystalline interstitial matter, graphitic. 
" 8, coarse white graphitic limestone. 
" 9, " bluish 
" 10 is a white graphitic limestone from a point about 1,000 feet 
north of bore hole No. 8 (tig. 1). Nos. 6, 7, 8 and 9 were from breccia. 
Two other localities where this transition has been observed 
were carefully sampled and tested with acid alone. One of 
these localities, a very prominent hill one mile east of McAfee 
station, shows ;( breccia much more striking than the place 
last named: Here only the limestone in direct contact with 
the granite showed effervescence; but after passing east- 
ward fifty feet from the brecciated zone, unchanged blue 
limestone is found which extends unbroken into New York 
state. 
* These analyses were hastily made for the purpose of determining 
the magnesia, by the chemist of the Lehigh Zinc and Iron Co. 
