150 NEW YORK STATE MUSEUM 
layer termed Long Beards Riffs sandstone.‘ East of the Genesee, 
above Dalton and Swains, the increase in sand is so rapid that on 
Slader creek near Canaseraga only two thin courses of black shale 
remain in the lower part of 150 feet of heavy arenaceous beds with 
full Chemung fauna that we propose to call the Canaseraga sand- 
stone. The massive character of the Canaseraga has led to its con- 
fusion’ with the Nunda at some points to the east, under the name 
Highpoint.’* It is believed that the Dunkirk-Canaseraga corresponds 
in horizon with the Dalmanella danbyi zone™ at the base 
of the Cayuta shale in the Ithaca region. 
Above the Dunkirk are the Gowanda beds? (Portland’’ pre- 
occupied), extending from Barcelona (formerly Portland Harbor),*® 
on Lake Erie, by the Walnut creek?” and Big Indian ravines to 
Gowanda (formerly Lodi)** and through the Cattaraugus creek 
gorges.’° The Gowanda makes the main mass of the hills of south- 
ern Erie?® and Wyoming’? counties, curving southward through 
Pike? and Higgins into the Genesee valley at Caneadea gorge.” 
The limited fauna of Portage type which the Gowanda beds carry 
on Lake Erie** and at Forestville?® gradually acquires the brachiopod 
facies of the lower Chemung (Cayuta) shale which it has on 
Caneadea creek,?? and these beds have been traced from this point 
through northern Allegany and Steuben counties, by way of Dalton, 
Bishopville, Bath,?® Savona”? and Bradford,?* into the Cayuta™ of 
= IN Wo Stee Mibis.. will, Co), dm moo, iN, Ws State Mins, 1Bwll, wes, wo, C8. 
N. Y. State Mus. Hdbk. 15, p. 94. 
IN, No Suatwe Wilwis, IBGt Sie, Ds WO (oars). IN, Wo State Whe, Bell, GOR, ~. 
Fle (Datgt))s 
* Defined, N. Y. State Mus. Bul. 52, p. 623. N. Y. State Mus. Hdbk. 109 
(1st ed). 
(Ws Sy Geolk Sins FOO. u60, Ds TO, ime © Cuelal eal fo, GO; 7S). 
"N.Y. State Mus. Bul. 60, fig. 13, p. 1028. 
(Geol, OF IN, WW Aun IDS, 1 doa, pi Willa, IN, Wo State Mims, Bull, Go, 
1028. 
AINE Yn State Mus eB il 60) ips t025—260, Ne Ys Sita tem Mitiseesiidibikesns. 
D, OV, 
(Geol, or IN, W., atin IDigt,, ps, ARS amel wll, XOUL. 
* Ibid. p. 380, 488, pl. XIII, section 2. 
onl (Ds Ae. 
= IllowGl, jo, Zkey2, 
* 4th Ann. Rep’t (1840), p. 402. IN. Y. State Mus. Bul. 118, p. 67. 
SAth Ann. IWepit, ppyos-4 Urs. Geoly Surv. Bul. 4p. 00-02. 777 
* Geol. of N. Y., 4th Dist., p. 246-47. 16th Rep’t N. Y. State Geol., p. 20 
seq. N. Y. State Mus. Mem. 6. .N. Y. State Mus. Hidbk. 15, p. 108. 
»N. Y. State Mus. Bul. 60, p. 1026 and preceding footnote. 
* Geol. of N. Y., 4th Dist., p. 250. .6th Rept N. Y. State Geol.: Hdbk. 
Sy, (De oy 
aN, WY, Seb wie IMitis, Bail, wor, p, 82, 
= WinniGl, Dy SO: 
