Glacial Lake Tonawanda
Encyclopedia
Lake
A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...
that existed approximately 10,000 years ago at the end of the last ice age
Ice age
An ice age or, more precisely, glacial age, is a generic geological period of long-term reduction in the temperature of the Earth's surface and atmosphere, resulting in the presence or expansion of continental ice sheets, polar ice sheets and alpine glaciers...
, in Western
Western New York
Western New York is the westernmost region of the state of New York. It includes the cities of Buffalo, Rochester, Niagara Falls, the surrounding suburbs, as well as the outlying rural areas of the Great Lakes lowlands, the Genesee Valley, and the Southern Tier. Some historians, scholars and others...
New York
New York
New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...
, United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
.
The lake existed on the southern (upper) side of the Niagara Escarpment
Niagara Escarpment
The Niagara Escarpment is a long escarpment, or cuesta, in the United States and Canada that runs westward from New York State, through Ontario, Michigan, Wisconsin and Illinois...
east of the present course of the Niagara River
Niagara River
The Niagara River flows north from Lake Erie to Lake Ontario. It forms part of the border between the Province of Ontario in Canada and New York State in the United States. There are differing theories as to the origin of the name of the river...
between Early Lake Erie
Early Lake Erie
Early Lake Erie was a prehistoric proglacial lake that existed at the end of the last ice age approximately 13,000 years ago. The early Erie fed waters to Glacial Lake Iroquois....
to the south and Glacial Lake Iroquois
Glacial Lake Iroquois
Glacial Lake Iroquois was a prehistoric proglacial lake that existed at the end of the last ice age approximately 13,000 years ago.The lake was essentially an enlargement of the present Lake Ontario that formed because the St. Lawrence River downstream from the lake was blocked by the ice sheet...
(the ancestor of Lake Ontario
Lake Ontario
Lake Ontario is one of the five Great Lakes of North America. It is bounded on the north and southwest by the Canadian province of Ontario, and on the south by the American state of New York. Ontario, Canada's most populous province, was named for the lake. In the Wyandot language, ontarío means...
) to the north. During the retreat of the glaciers, the water levels of the Great Lakes were higher. Lake Tonawanda was created and fed by the elevated waters of Lake Erie. Lake Tonawanda itself was drained into Lake Ontario by a series of falls over the escarpment, including one at present day Lockport, New York
Lockport (city), New York
Lockport is a city in Niagara County, New York, United States. The population was 21,165 at the 2010 census. The name is derived from a set of Erie canal locks within the city. Lockport is the county seat of Niagara County and is surrounded by the town of Lockport...
.
The lake evaporated when the waters of Lake Erie dropped below the level of the feeder streams to the lake. Subsequently Lake Erie drained over the escarpment entirely through Niagara Falls
Niagara Falls
The Niagara Falls, located on the Niagara River draining Lake Erie into Lake Ontario, is the collective name for the Horseshoe Falls and the adjacent American Falls along with the comparatively small Bridal Veil Falls, which combined form the highest flow rate of any waterfalls in the world and has...
, which marks roughly the western terminus of the former lake bed.
The remains of the previous falls, which rivaled Niagara Falls in grandeur, can be seen along the escarpment. The sinking of homes in the lakebed has been an ongoing problem in communities such as Amherst, New York
Amherst, New York
Amherst is a town in Erie County, New York, United States. As of the 2010 census, the town had a total population of 122,366. This represents an increase of 5.0% from the 2000 census. The town is named for Jeffrey Amherst, a British Army officer of the colonial period...
.