|
|||
| present ground surface in Niagara Frontier | |||
415 |
|
||
| (limestone) | Oak Orchard | intake
towers - Robert Moses Goat Island, 3 Sisters Island |
|
| (limestone) | Guelph | lip of American Falls | |
| (limestone) | Eramosa | ||
| (limestone) | Goat Island | resistant caprock at Horseshoe Falls | |
| (dolomite) | Gasport | ||
420 |
Clinton Group |
||
| (dolomite) | Decew | cave at Devils Hole | |
| (shale) | Rochester | tunnels at Sir Adam Beck | |
| (limestone) | Irondequoit | ||
| (dolomite) | Reynales | base of Falls/river level | |
| (shale) | Neagha | ||
| (sandstone) | Thorold | ||
425 |
Cataract/Medina Group |
||
| (sandstone/shale) | Grimsby | ||
| (sandstone/shale) | Power Glen | ||
| (sandstone) | Whirlpool | Whirlpool level | |
Ordovician Era |
|||
430 |
|
Lake Ontario level | |
| NIAGARA FALLS THUNDER ALLEY NAVIGATOR | ||
| SITE MAP | ||