What is a stratified drift?

STRATIFIED DRIFT means predominantly unconsolidated, sorted sediment composed of layers of sand, gravel, silt or clay deposited by meltwaters from glaciers.

How does stratified drift form?

Stratified Drift Deposits are the most prominent at the end of the glacier. They consist of: … Outwash Plain: braided meltwater streams deposit sediment over a wide area (common in areas of continental glaciation). Kettles: depressions in outwash plains formed by the melting of buried blocks of ice.

What is stratified glacial drift?

The term stratified drift refers to glacial drift that has been reworked by glacial meltwater and then deposited either in direct contact with glacier ice or at some point more or less far away from the glacier, in a wide variety of depositional environments.

Where is stratified drift found?

Stratified-drift aquifers consist primarily of sand and gravel deposits that were deposited in layers by meltwater streams flowing from the retreating glacial ice. This aquifer type was formed primarily in valleys in the northern parts of the study area, and is of limited extent (fig. 2).

What is the difference between till and stratified drift quizlet?

Till is an unsorted type of glacial drift, whereas stratified drift is sediment that is sorted according to the size and weight of particles.

Where are the largest kettles located?

The largest kettle in the world is Lake Ronkonkoma on Long Island. Kettlehole lakes are extremely deep compared to conventional lakes.

Where can kettle lakes be found?

Kettle lake in the highlands of Isunngua, Greenland.

Is lake Michigan a kettle?

Most lakes on the Keweenaw and most of Michigan are kettles.

What is the deepest kettle lake?

Walled Lake (Michigan)

Walled Lake, a spring-fed kettle lake, which offers beach access from Lakeshore Park and Mercer Beach, is 670 acres in size and has a maximum depth of 53 feet.

Why are they called kettle ponds?

Depressions in the outwash plain are called kettle holes. They mark the sites of ice blocks that were left behind by the retreating glacier and then buried by outwash sand and gravel deposits. Slow melting of the larger ice blocks left depressions that were deep enough to intersect with the water table.

What is a glacier pond?

Kettles form when a block of stagnant ice (a serac) detaches from the glacier. Eventually, it becomes wholly or partially buried in sediment and slowly melts, leaving behind a pit. In many cases, water begins fills the depression and forms a pond or lake—a kettle.

How deep are kettle ponds?

Kettles may range in size from 5 m (15 feet) to 13 km (8 miles) in diameter and up to 45 m in depth. When filled with water they are called kettle lakes.

Do kettle lakes have fish?

The bulk of crappie fishing on kettle lakes will take place post-spawn and throughout the summer and into the fall. This is where another element of kettle lake construction comes into play.

How old are kettle lakes?

Stretching from Cape Cod to the High Plains is a freshwater galaxy of nearly 100,000 kettle lakes and ponds created by an ice sheet that existed until about 11,000 years ago.

What is a glacier horn?

Horns are pointed peaks that are bounded on at least three sides by glaciers. They typically have flat faces that give them a somewhat pyramidal shape and sharp, distinct edges.

Does Canada have glaciers?

Canada’s landmass and climate supports approximately 20% of the Earth’s glacier ice volume excluding the Antarctic and Greenland ice sheets. Outside of the ice sheets of Antarctica and Greenland, Canada has more glacier coverage in the form of mountain glaciers, icefields and ice caps than any other nation.

How many glaciers are in Canada?

With more than 17,000 glaciers, Alberta and BC would experience dramatic changes to their ecosystems, water supply, agriculture and tourism.

Where is the biggest glacier in the world?

Antarctica

Lambert Glacier, Antarctica, is the biggest glacier in the world. This map of Lambert Glacier shows the direction and speed of the glacier.

What is the biggest glacier in Canada?

The Saskatchewan Glacier

The Saskatchewan Glacier, with an area of 23 square miles (60 square km), is the largest on the Columbia Icefield.

Does Quebec have glaciers?

Jardin des Glaciers (Glacier Garden): Shaped by the Last Ice Age. The maritime regions of Québec, particularly Côte-Nord, were shaped by the last ice age and the melting of the glaciers.

Why are glaciers important to Alberta?

These glaciers act as natural reservoirs, with snow and ice melt contributing significantly to summer flow in some of Alberta’s major rivers: the Bow, Red Deer, North Saskatchewan, Athabasca, and Peace. Glaciers in northeastern B.C. also contribute to the headwaters of the Peace River.

Are there glaciers in Ontario?

Starting about 15,000 years ago, the glaciers started to melt back in southern Ontario. An enormous amount of water was released and glacial lakes formed. These glacial lakes predated the present day Great Lakes. One glacial lake was called Lake Algonguin.

What happened lake Iroquois?

Some time between thirteen and twelve thousand years ago, the ice disappeared from the Lake Ontario basin and the lake waters which had had to use southern and western outlets at a higher level, found an outlet into the Hudson River near Rome, New York.

How many times has Canada been covered by glaciers?

Such periods are known as ice ages. During ice ages, huge masses of slowly moving glacial ice—up to two kilometres (one mile) thick—scoured the land like cosmic bulldozers. At the peak of the last glaciation, about 20 000 years ago, approximately 97% of Canada was covered by ice.

What did glaciers do to Toronto?

The surface of most of Canada has been shaped by the advancing and retreating of these glaciers. Most of Great Lakes’ basins of and other Canadian lakes both large and small were carved out by the moving ice. Soil and rocks were scooped off the Canadian Shield and deposited over southern parts such as Toronto.

How did the ice age affect Canada?

Much of Canada’s landscape was molded by glaciers over thousands of years. Valleys were widened, moraines were sculpted and bedrock was smoothed. Glaciation also left behind many sediments, including gravel, which is important to Canada’s export economy.

When did glaciers last cover Canada?

about 21,000 years ago

The last glacial period in Canada peaked about 21,000 years ago, at which time almost all of Canada was covered by ice. Ice retreated slowly at first, with the ice sheets still present in the northern United States 14,500 years ago.