REPORT OF THE DIRECTOR, 1922 155 
absence the succeeding Cattaraugus red shales)“ follows the 
“ Chemung ” (Chadakoin) in the Olean hills. If the Panama is the 
higher Salamanca’® lentil, then some of the beds beneath it must be 
of Bradford age, but as Spirifer disjunctus and eight of 
its “Chemung ” associates continue’? above the Wolf Creek while 
a much larger number of “Chemung” species®® accompanies 
Spirifer disjunctus above the Panama-LeBoeuf base into 
the Venango group of Pennsylvania and this dominance of lower 
forms is still more marked across the Ohio line*! as the Venango 
merges in the (upper) Chagrin,*? the faunal evidence would not 
preclude such a reference. Time was lacking to review this ques- 
tion in the field. 
The bright red Cattaraugus beds™ of the Olean region are shown 
by continuity of the included Salamanca conglomerate‘* to fade into 
the Conewango beds* of the Warren folio, assuming more and more 
the full marine facies that characterizes them farther west in the 
“Venango group’** and Riceville shale® of Pennsylvania. The 
faunal and lithic expression of the Venango-Riceville is such that 
early workers*® looked upon this series also as undoubted Chemung, 
milled! aS it 1S tO ne VERY tOD 7 @ Sioiviriweir dis]juUmerus 
fauna. Of even more typcial Chemung aspect is the equivalent 
upper Chagrin®™ of Ohio, whereas the lower Chagrin (Girard-Chada- 
koin) has subsided into nearly barren®’ beds of decided Portage 
facies, though it is likely that every bit of this Chagrin is later than 
the highest true Chemung of the Elmira region. 
Thus at many a stratigraphic level we find barren Catskill red beds 
at the east grading westward into fossiliferous olive or brown 
“Chemung ” beds with a brachiopod fauna, augmenting as the silica 
gives way.to lime,** then falling off rapidly as green shales increase 
and fading through a Leiorhynchus facies into barren “ Portage” 
or pelecypod-cephalopod fauna and finally “ Huron” black shales. 
™N. Y. State Mus. Bul. 60, p. 971-78. 
ibid mO74e 
™ Ibid. p. 993-04. 
“Pe, 261 GS. Rept Oa, wd. TIO, @7, ce, Olmi@ GAS. avila ser, IBwil, ws, ip. 
ARS—I'77., Swe, 
=(Olm@© GaSe. Zila Ser, Bull, WE, wo. aR, GC. 
= TlonGl,. 1D. usa, Cle, 
“1, S, Geol, Stray Polio 172, j, 4. 
* Pa. AGL (GrSs INEM? Ol, jo, CO. 
Sl bidenpaLOy. 
~ IioiGl, , CO, Wito, TZ Pall or IN, WA, p. WR, Avo) asin, Wh. S, Geol Stuar 
Bell, aut, wp, Wow), 
“Ola GS, aia ser, Bull 75, wp. 6, 182. 
“(Conapare Pail, or IN, Wo 4, . 2RO=87, 
