Search results
Results From The WOW.Com Content Network
Moraine may also form by the accumulation of sand and gravel deposits from glacial streams emanating from the ice margin. These fan deposits may coalesce to form a long moraine bank marking the ice margin. [11] Several processes may combine to form and rework a single moraine, and most moraines record a continuum of processes.
Terminal moraine refers to the moraine occurring at the point of the furthest advance of a glacier. A recessional moraine is a ridge of deposited debris that occurs when the glacier is stationary for an extended length of time. [27] This occurs when a glacier meaning the glacier is in equilibrium or has halted during retreat .
Terminal moraine of Wordie Glacier, Greenland Map of the Salpausselkä terminal moraines in Southern Finland. A terminal moraine, also called an end moraine, is a type of moraine that forms at the terminal (edge) of a glacier, marking its maximum advance. At this point, debris that has accumulated by plucking and abrasion, has been pushed by ...
Rain and snow melt slowly soak into the moraine, being filtered and purified in its many sand and gravel aquifers. The cool, fresh water is discharged into the headwaters of streams and rivers which eventually flow into Lake Simcoe, Lake Scugog and Lake Ontario. The aquifers are also the water supply for some communities on the Moraine.
These are also the supply of fresh water to aquifers in the moraine through complex subterranean connections (see hydrology). Construction development nearby, and with expansion of communities around the moraine in need of potable water, it is a contested site in Ontario, since it stands in the path of major urban development (see political ...
Another term for till plain is ground moraine. Not to be confused with outwash plains , till plains differ due to their sorting mechanisms and resulting deposit characteristics. [ 3 ] Till plains are deposited as unsorted material picked up by ice as glaciers advance and retreat, or if a body of ice becomes detached from the main glacier and ...
Till is deposited as the terminal moraine, along the lateral and medial moraines and in the ground moraine of a glacier, and moraine is often conflated with till in older writings. [16] Till may also be deposited as drumlins and flutes, though some drumlins consist of a core of stratified sediments with only a cover of till. [17]
The ground moraine landscape consists predominantly in flat to gently rolling terrain, on which the ice mass deposited till. Zungenbecken, where the scouring of material played a significant role, occur to a lesser extent and are an element of the ground moraine landscape in the Scandinavian glaciation region. Because the advancing ice sheet ...