Moraines in a sentence

Ground moraines Ground moraines create irregular, rolling topography Ground moraines are till-covered areas with irregular topography and no ridges, often forming gently rolling hills or plains.

Because lateral moraines are deposited on top of the glacier, they do not experience the postglacial erosion of the valley floor and therefore, as the glacier melts, lateral moraines are usually preserved as high ridges.

In alpine glaciers, ground moraines are often found between the two lateral moraines.

Lateral moraines are formed at the side of the ice flow and terminal moraines at the foot, marking the maximum advance of the glacier.

Medial moraines are formed when two different glaciers merge and the lateral moraines of each coalesce to form a moraine in the middle of the combined glacier.

Characteristics Moraines may be composed of debris ranging in size from silt -sized glacial flour to large boulders.

Glaciers act much like a conveyor belt, carrying debris from the top of the glacier to the bottom where it deposits it in end moraines.

Glaciers leave behind moraines that contain a wealth of material—including organic matter, quartz, and potassium that may be dated—recording the periods in which a glacier advanced and retreated.

Ground moraines may be modified into drumlins by the overriding ice.

In this area, the extensive glacial moraines, eskers, and drumlins have limited the profitability of agriculture by fragmenting fields and presenting serious erosion problems.

Laurel Creek, Convict Creek, and McGee Creek all have prominent moraines.

Moraines may be on the glacier’s surface or deposited as piles or sheets of debris where the glacier has melted.

Multiple lateral moraines may develop as the glacier advances and retreats.

Recessional moraines are small ridges left as a glacier pauses during its retreat.

Rogen moraines are named after Lake Rogen Möller, P., 2006.

Some moraine types are known only from ancient glaciers, while medial moraines of valley glaciers are poorly preserved and difficult to distinguish after the retreat or melting of the glacier.

Sudden failures of these moraines can cause floods with cascading failures of manmade structures downstream.

Terminal moraines mark the maximum advance of the glacier.

There are two types of end moraines: terminal and recessional.

The surface of the peninsula is generally level, broken by conical hills and glacial moraines usually not more than a few hundred feet tall.