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. ‘ 
Lake Erie is above the level of tide water, . ~ . : 570 
Top of Niagara falls below Lake Erie, . : : 66 
Water of the canal at Rochester below Lake oo : a 64 
Bottom of falls at Niagara, (160 feet,) below Lake Bi : 226 
From bottom of falls to Lewiston, ; P 104 
Lake Ontario is below Lake Erie, : ie 330 
Top of falls at Rochester below water of the ant ; : 31 
do. do. falls of Niagara, . ‘ 33 
Canal at Rochester above Lake Ontario, ‘ 266 
Summit level of Genesee and Olean Canal is shee the canal 
at Rochester 
The hills near it are cs ene er fickee 
Allegany river at Olean above canal at Rochester, : . 900 
Ohio river at Pittsburgh is below Olean, ; <7 Gp 
do. do. above canal at hates. . 250 
do. do. Lake Erie, . Se 186 
Coal at Pte above the Ohio, =. se, ritesediege 
do. 0. Lake Erie, . : ; : 515 
do. : canal at Rochester,. ; 579 
do. do. Lake Ontario, i 845 
Ohio at Little Beaver river, near west line of Dectsylvana’ is 
above Lake Erie, _ . : . . 75 
Coal near Little Beaver ehcre ne Ee : : : 412 
Elevation of hill above the coal, _ . ae 80 
do. __ this coal bed above canal at Rishon 476 
Passing from the Catskill range over its graywacke to the salif- 
erous rock of Eaton, which Bia 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. 
