landforms composed of unsorted materials deposited by glaciers. They can cover broad geographic areas of millions of acres. Topography can vary from nearly level "till" plains to rough end moraine landscapes composed of steep dry ridges interspersed with deep kettle holes. These glacial "kettles" are frequent locations for lakes and wetlands.
A moraine is an elongate ridge of unconsolidated drift deposited along the margins of a glacier. There are several different types of moraines including end, terminal, recessional, lateral, and medial moraines. An end moraine is the general term describing a moraine deposited at the toe of the glacier during times of glacial stability (when the glacier stays in one place long enough for a significant amount of drift to accumulate). A terminal moraine is an end moraine that marks the greatest advance of the glacier before its retreat (i.e. it is farthest from the cirque). A recessional moraine is an end moraine deposited during periods of stability while the glacier is retreating. A lateral moraine is deposited along the margins of a glacier (often found on the walls of U-shaped valleys). A medial moraine is formed when two glaciers advance beyond their valleys and merge, at which point their lateral moraines combine to form a medial moraine between the two glaciers. Lateral and medial moraines only form in mountain glaciers, while the other moraines form in both mountain and continental glaciations.
a glacial deposit (till) with a distinctive topographic expression. "Terminal moraines" mark episodes of stability or re-advance in a Period of overall glacial retreat. Moraines appear as hill or ridges marking original glacial limits.
These are piles of debris left behind by melting glaciers. Unlike an erratic, which is a single block of rock perched on top of the land, moraines are huge piles of various sizes of rocks, gravel and sand. They can form a variety of features such as long linear â€˜kamesâ€™, which snake across valleys, or dumpy hillock-like â€˜drumlinsâ€™ depending on how the ice melted. They are also named depending where they were on the glacier, so a terminal moraine was formed at the front of the glacier and a lateral moraine formed at the sides.
Moraines are made of debris deposited by glaciers. The most common moraines are end (or terminal) moraines and lateral (or slide) moraines. Rock that the glacier has broken out of the valley is deposited in the moraines. Rock in moraines has been broken up and ground into boulders and various sizes of gravel and sand.
A mound, ridge, or other distinct accumulation of glacial drift, predominantly till, deposited in a variety of topographic landforms that are independent of control by the surface on which the drift lies.(see also End Moraine)
The rocks and soil carried and deposited by a glacier. An "end moraine," either a ridge or low hill running perpendicular to the direction of ice movement, forms at the end of a glacier when the ice is melting.
Usually refers to a mound or ridge of unstratified glacial drift (glacial debris, till) deposited by the direct action of glacier ice. Moraines left along the sides of a receded glacier like the ones along the Nisqually Glacier at Mt. Rainier, Washington, are called Lateral Moraines. Moraines built at the toe of the receded glacier, like the one left over from the Pleistocene Epoch at Bloody Mountain in Long Valley Caldera, California, are called Terminal Moraines.
When a glacier moves forward, its weight and movement causes dirt, rocks and debris to be literally bulldozed along in front of it. Then as the glacier recedes, it leaves behind piles known as moraines. Lateral moraines flank the sides of glaciers while a terminal moraine marks the farthest glacial advance.
A ridge formed by the unsorted gravel, sand and boulders carried along by the glacier and deposited at the outer edge, or front, of the glacier. Some are only 10' high while others rise 250' to 300'. Moraines define the basic route of the Trail, so they can be found in many places.
A mound, ridge, or other distinct accumulation of unsorted, unstratified glacial drift, predominantly till, deposited chiefly by direct action of glacier ice, in a variety of topographic landforms that are independent of control by the surface on which the drift lies. (Bates and Jackson 1980.)
A landform of moderately-sloped hills created by the movement of a glacier. As glaciers moved inland during an ice age, they scraped up a mixture of gravel, sand, clay and silt. When the glaciers advance stalled and the ice began to melt and retreat, the materials deposited at the glacier's melting front built up a ridge, known as an end moraine, marking the furthest extent of the ice advance.
A hill-like pile of rock rubble located on or deposited by a glacier. An end moraine forms at the terminus of a glacier. A terminal moraine is an end moraine at the farthest advance of the glacier. A lateral moraine forms along the sides of a glacier. See till.
A mound, ridge, or other distint accumulation of unsorted, unstratified glacial drift, deposited chiefly by direct action of glacier ice. The geomorphic name for a landform composed mainly of till that has been deposited by either a living or extinct glacier.
Accumulations of poorly sorted glacial materials (till) transported by glacial ice. Moraines can form in many ways. Some moraines form in front of a glacier (terminal or end moraine), along the side of a glacier (lateral moraine), or under a glacier (ground moraine).
An accumulation of rock material, with an initial topographic expression of its own, built chiefly by the direct action of glacial ice or by running water emanating from the glacier. Moraines may be classified as end moraine, ground moraine, lateral moraine, recessional moraine, or terminal moraine depending on their relationship to the movement of the ice mass.
n. A mound or ridge of sediment deposited by a glacier; lateral moraine- n. deposited to the side of a glacier; terminal moraine- n. deposited to the front of a glacier; ground moraine- n. deposited on the land surface.
Mass of poorly-consolidated rock debris deposited by a glacier. Moraines typically form elongate or curved ridges and contain rock fragments of a wide range of sizes, from fine silt and clay to coarse boulders.
general term refering variously to glacial deposits or landforms. Used in America mainly for glacial landforms of constructional nature, such as end moraine or ground moraine. Used in Europe also to refer to the glacial deposits themselves, as with moraine clay or sand. Also refers to sediment in transport by a glacier, such as medial or lateral moraines. Derived from French word for piles of rubbly deposits in front of glaciers.
An accumulation of rock material on or around a glacier, derived from rock fall and from erosion of the valley sides by the glacier. Mortar Hole Similar to a metate, but the cavity in which food is placed is round instead of a straight groove. The food is ground in a circular motion with a handheld stone called a pestle. Mortar holes were also used to grind paint pigments, medicines, and pottery ingredients. Motor Vehicle Every vehicle which is self-propelled.
random accumulation of boulders, rocks, screen and sand carried down the mountain and deposited by a glacier. Crossing a moraine is slow going and is only done when alternative routes would take even more time.
a mound, ridge, or other distinct accumulation of glacial till. Lateral and terminal moraines of a valley glacier, Bylot Island, Canada. The glacier formed a massive sharp-crested lateral moraine at the maximum of its expansion during the Little Ice Age. The more rounded terminal moraine at the front consists of medial moraines that were created by the junction of tributary glaciers upstream. (Photo courtesy of the Natural Resources Canada. Copyright Terrain Sciences Division, Geological Survey of Canada.)
Moraine is rock debris, fallen or plucked from a mountain and transported by glaciers or ice sheets. The moraine may be lying on the glacier's surface or have been deposited as piles or sheets of debris, where the glacier has melted. Till is another word used to describe the sediments left by melted glaciers but is not used to describe debris lying on a glacier's surface.