122 Remarks on the Rocks of New York. 
The surveys for canals and railroads, presented in various reports 
of the engineers, show us the relative situation of the strata at vari- 
ous places. ; 
Feet. 
Lake Erie is above the level of tide water, . ; : 570 
Top of Niagara falls below Lake Erie, . : . 5 66 
Water of the canal at Rochester below Lake Erie, . } 64 
Bottom of falls at Niagara, (160 feet,) below Lake Erie, . 226 
From bottom of falls to Lewiston, j : : ; 104. 
Lake Ontario is below Lake Ene : : : 330 
Top of falls at Rochester below water of the eh ; : 31 
do. do. falls of Niagara, : 33 
Canal at Rochester above Lake Ontario, : : 266 
Summit level of Genesee and Olean Canal is above the canl 
at Rochester, . ; A : : 950 
The hills near it are several fonaeed feet ee, 
Allegany river at Olean above canal at Rochester, . 5 900 
Ohio river at Pittsburgh is below Olean, ‘ 4 . 650 
do. do. above canal at Rochester, : 250 
do. do. Lake Erie, . A ‘ 186 
Coal at Pittsburgh above the Ohio, ! ; ee 329 
do. do. Lake Erie, . : : A 515 
do. do. canal at Rochester, . : : 5719 
do. do. Lake Ontario, é ° f 845 
Ohio at Little Beaver river, near west line of Pennsylvania, is 
above Lake Erie, . d i ; . g 15 
Coal near Little Beaver above Was Erie, i : 4 A12 
Elevation of hill above the coal, . as ‘ bs 80 
do. — this coal bed above canal at iochenen, 476 
Passing from the Catskill range over its graywacke to the salzf- 
erous rock of Eaton, which shows itself east of Utica and extends 
westward to Niagara, lying under all the rocks of this extended dis- 
trict, the location requires it to be the old red sandstone of European 
geologists. It contains abundance of Fucoides Brongniartii, Har- 
lan, and many other similar vegetable remains. On this sandstone 
rests a series of slates, limestones, shales, and siliceous strata, which 
correspond perfectly to the mountain limestone of Europe, as noticed 
by Dr. Hayes in his communication already referred to. This great 
stratum of our mountain limestone includes the strata called by Prof. 
Eaton, ferriferous slate, argillaceous iron ore, ferriferous sandrock, 
calciferous slate, geodiferous limerock, and cornitiferous limerock. 
