REPORT OB We EE Ww DURE CRORlO22 153 
Cuba sandstone is easily traced up Ischua creek to near Machias,** 
_ where the name Ischua sandstone*® was early appropriated to it by 
Horsford, and so goes above the Machias-Northeast series. It 
extends down Great Valley creek by way of Devereux and Ellicott- 
_ville®° into the north edge of the Salamanca quadrangle,’* and on 
the hills above West Valley and north of East Otto to the vicinity of 
Maples, thence west by Jersey Hollow to the quarries at Cattaraugus, 
New Albion®® and Leon.*° Its position above the Machias 
fauna is well seen at Cattaraugus and Jersey Hollow. West of 
Leon it appears to fade into thin barren sandstones on the Canada- 
way and then to “ fine’ into shales. 
Eastward from Cuba, the Cuba horizon rises to over 1700 feet 
A. T. on the hill southwest of Belmont and evidently passes on east 
at such an elevation as to place it not lower than the conglomerates 
at top of the Wellsburg standstone.°? The Cuba sandstone marks 
the upper limit of Delthyris mesacostalis in New York 
Statens 
In Pennsylvania the Girard shale** overlies the Northeast beds, 
for a thickness of 225 feet. On approaching the New York line, the 
upper portion of the Girard becomes increasingly fossiliferous from 
the top down, carrying specially Camarotoechia dupli- 
cata, and changing to a green sandy shale. On Chautauqua 
creek®® the normal Girard shale is still about 140 feet thick succeeded 
by about a hundred feet of the green fossiliferous shale, east of 
Volusia. On the Canadaway this Volusia shale is about 180 feet and 
the normal Girard 1f present can not exceed 40 feet. The Volusia 
shale evidently passes eastward above the Cuba and corresponds 
with the interval (zone 11)°’ between the Cuba and the “ quarry 
sandstones ” on the Olean area. Whether the soft shale®* beneath 
the Cuba at the east can be regarded as any remnant of the Girard 
shale remains to be seen. It is inferred that the Volusia must be 
either highest Wellsburg or else “ Catskill” in the Elmira region.®® 
(Geol, OF WN, Wo, Ada IDNSte, jo, cio: 
“ath Ann. Rep’t (1840), p. 466, 460. 
 WosiGl, (De ZizAlle 
= N. Y. State Mus. Bul. 60, p. 960. 
*U. S. Geol. Surv. Folio 160, p. Io, fig. 6 (field ed. p. 309, 78). 
SN. Y. State Mus. Bul. 60, p. 992. U.-S. Geol. Surv. Bul. 41, p. 28. 
meeaeduGowkepit) OA py 11S 300-1. 
~ Pal. of N. Y. 4, p. 350;'8 (pt 2), p. 102. 
* Geol. of N. Y., 4th Dist., p. 253. 
*N. Y. State Mus. Bul. 52, p. 528. N. Y. State Bul. 60, p. 990, 902. 
* U.S. Geol. Surv. Bul. 41, p. 63, 64, 71. N. Y. State Mus. Bul. 60, p. 968. 
®U.S. Geol. Sury. Folio 160, p. 11, fig. 6 (field ed., p. 39, 82). 
