12 The American Geologist, January, 1892 
and yellow shales cease and the Haggy,almost laminated, red sand- 
stones begin. The last horizon of Chemung mollusks was found 
at 200 feet lower, where, at approximately 800 feet above the 
conglomerate, the writer orginally drew the line between the two 
groups. 
The interval between the conglomerates is filled with yellow to 
red shales and gray, brown, blue or red sandstones; the red beds 
form an insignificant portion of the section, but such as are pres- 
ent are strikingly like Catskill, for the shales are often bright 
red and the sandstones cross bedded or in thin flags. Many of 
the beds in this interval are richly fossiliferous and the important 
horizons of Chemung lamellibranchs are at but a little way be- 
low the upper conglomerate. The lowest beds of the Chemung 
are shales and flags; the shales overlying the flags are yellow, 
gray, olive, dark brown and reddish; while the flags, which doubt- 
less represent the Portage of New York, are almost wholly olive, 
and, unlike the overlying shales, appear to be very sparingly fos- 
siliferous. 
seyond Fulton county northward into New York, we must de- 
pend almost wholly upon the work of Prof. I. C. White, who has— 
demonstrated the stratigraphical relations of the beds under con- 
sideration to those of the Catskill area of New York, and has told 
the story with such clearness that there is no opportunity for any one 
to cavil. His grouping of the rocks, however, differs from that 
already given; he prefers to include as Catskill all beds down to 100 
feet below the upper conglomerate, which is the lowest horizon at 
which he found fish remains; he regards as transition the beds be- 
low that fish bed to the lowest red bed, 150 feet above the lower 
conglomerate, and applies to them the term Chemung-Catskill: 
while the remaining beds of the section are taken by him to rep- 
resent the Chemung and Portage of New York. He identifies 
the Upper Chemung conglomerate of Fulton county with his 
Luckawacen conglomerate of the New York border and he gives 
the name of A/legrippus to the lower conglomerate. 
The succession in Huntingdon county, Pennsylvania, * is : 
*I. C. White in Geology of Huntingdon County, Harrisburg, 1885, pp. 
92-104. As given here Nos. 1, 2, and 100 feet of No. 3, of the Chemung 
belong to Prof. White’s Catskill; the rest of No. 3, except 150 feet at the 
base forms the Chemung-Catskill of the same author. All sections along 
this outcrop, quoted from Prof. White, have been re-arranged in this 
way. 
