OUTLINE OF THIS PAPER. 
The following paper is an account of a field investigation of the Devonian system 
of eastern Pennsylvania and New York. The work was undertaken under the 
auspices of the U. S. Geological Survey for the purpose of comparing the formations 
of this region with the more typical sections of the Devonian system in central and 
western New York. 
The first field work was done in 1884, when a section was made from Port Jervis, 
along the line of the Monticello and Port Jervis Railroad, to Monticello, and through 
Sullivan County over exposures of the Catskill stage. In 1890 the various outcrops 
were studied along the Ulster and Delaware Railroad from Kingston to the Grand 
Hotel station, and along the Stony Clove and Catskill Mountain Railroad from 
Phoenicia to Kaaterskill and Palenville. 
During the following year an examination was made of the Devonian exposures 
along the Lehigh River, in Carbon County, Pennsylvania, along the Delaware, 
Lackawanna and Western Railroad across Monroe County, then northeast over the 
Devonian to Port Jervis, when the Delaware River section was studied, and finally 
from Port Jervis up the Neversink Valley to Summitville. on the New York, Ontario 
and Western Railroad, in Sullivan County, New York. 
The stratigraphy of the region was studied while thorough search was made for 
fossils in all the exposures examined. The collections of fossils have been carefully 
identified, and the data obtained in this way have been used in comparing the 
formations of this region with those of central New York. Such comparative study 
has shown differences in classification between the system used by the Pennsylvania 
survey and that of the New York standard series, and certain changes are suggested 
which will bring the correlation of the Pennsylvania section nearer that of the 
New York. 
A change of location and an accession of duties have rendered it impossible to 
continue this study in eastern New York and central Pennsylvania, as had been 
planned by the writer; consequently it is deemed best to publish now the results of 
this portion of the investigation. As a result of this change the paper fails to show 
that fullness of detail and extent of scope which was desired by the writer; but it 
is hoped that the contribution may be of some assistance in working out the cor- 
relation of the Devonian system of this region. 
Topeka, Kans., July 5, 1893. C. S. P. 
Bull. 120 1 
