364 Tin- American Geologist. June, ism 
Catskill in eastern New York,* and in his ''Report ol the Sub 
Committee on the Upper Paleozoic (Devonio)" to the Fourth 
International Congress ol Geologists, the professor said. "The 
Catskill stage in eastern New York follows the Chemung fauna 
in general, but the Eaot that speoies of fish and plants whioh 
characterize the typical Catskill rocks have been found in strata 
having' Chemung fossils above them, makes it impossible to locate 
the precise equivalenoy of rocks marked only by the one or the 
other of those types of fossils, "t In another publication professor 
Williams has written more Cully upon this topie and the following 
quotation gives a good idea o( his \ iews at that time. -In regard 
to the Catskill group, my studios have led me to believe that the 
Catskill rod rooks of the east otter evidence of having boon con- 
temporaneous with a groat portion oi the Upper Devonian rooks, 
and a comparison of faunas, at least, goes to show that the base 
of the red hods does not form a definite and uniform horizon. . . . 
This shutting off of the sea [with its Chemung marine fauna] took 
place earlier in the eastern than in the western part of this New 
York-Pennsylvania area, and there is reason to believe that in 
Sullivan county, Now York, it was as early as the reign of the 
Hamilton faunas. " + 
M\ field studios, the past summer, in the eastern Catskills of 
Ulster and Greene counties, New York, have shown the correct- 
ness o\' the last sentence in the above quotation. In that region, 
along the line of the bister and Delaware lb lb, the last marine 
fauna is composed principally of Hamilton speoies. above whioh 
are fossil plants of Hamilton faeies ; then non-fossiliforous shales 
and sandstones in whioh the first of the reds appear; still higher 
arenaceous shales ami sandstones in whioh speoies of ArchcBopteris 
occur : and at the '-81111111111" gray and red sandstones, with some 
pebbles, but no fossils. Fifteen miles northeast, a section along 
the Kaaterskill creek and up Hound Top mountain agrees in gen- 
eral with the above section ; 'nit. differs in having a great develop- 
ment of massive conglomerates and also the Archeeopteris zone was 
not noticed, At the Great falls:, of the Kaaterskill are numerous 
*Proc. Am. As. Adv. Set., Vol. XXXIV. 1880, p. 234. 
1 American Geologist, Vol. II, tsss. p. 841 : or. Reports of the Amor. 
Comra. to the London Session of the int. Cong, of Geologists, Pt.C, p.19. 
{bull. Q. s. Geol. surv.. No. 11. tssT. p. •:;. 
Those falls, whioh are also known as Bigh falls and Big falls, are 
between throe ami four miles down the crook from Palenvillt\ 
