Definitions for "Esker"
Related Terms:
Kame, Outwash plain, Outwash, Moraine, Drift , Glaciofluvial deposits, Kettle , Glacial drift, Glacial outwash, Lateral moraine, Stratified drift, Valley train, Kettle hole, Rock flour, Rock glacier, Ground moraine, Glacial till, Till, Plucking, Glacial erratic, Drumlin, Colluvium, Erratic, Boulder clay, Pothole, Glacial striations, Neve, Sand dune, Erratics, Till plain, Desert pavement, Colluvial, Dune , Terminal moraine, Corrasion, Crevasse, Erode, Frazil ice, Accumulation, Hummock, Moulin, Tillite, Deflation, Nev, Firn, Alluvial deposits, Striations, Alluvium, Sediments
a snake-like ridge of roughly stratified sand and gravel formed by water flowing in or under a glacier.
A long winding ridge of sorted sands and gravel. Thought to be formed from sediment deposited by a stream flowing within or beneath a glacier.
An esker is a sinuous ridge of stratified fluvial sediments deposited underneath a glacier in meltwater channels. These channels are initially eroded both into the underlying bedrock, but as the channel fills it begins to erode into the overlying ice while continuing to deposit sediments. When the ice retreats these channel deposits are left behind as topographic highs. Eskers vary greatly in size and extent, but can be 100 feet high and 100 miles long.
A ridge of sediment that forms under a glacier's zone of ablation, made up of sand and gravel deposited by meltwater. An esker may be less than 100 meters or more than 500 kilometers long, and may be anywhere from 3 to over 300 meters high.
A long, narrow, sinuous ridge of stratified glacial drift deposited by a stream flowing beneath a glacier in a tunnel or in a subglacial stream bed.
Long twisting ridges of sand and gravel found on the Earth's surface. Created when the deposits of subsurface glacial streams are placed on the ground after glacial melting.
A glacial deposit of sand and gravel in the form of a continuous, winding ridge, formed from the deposits of a stream flowing beneath the ice.
a long narrow ridge of sand and gravel deposited by glacial meltwaters.
A sinuous ridge of sand and gravel deposited by meltwater in a subglacial channel.
sinuous ridges composed of glacial material deposited by meltwater currents in englacial tunnels. Their orientation is generally parallel to the direction of glacial flow, and they sometimes exceed 100 kilometres in length.
A ridge of sorted sand and gravel that snakes across a ground moraine; the sediment of an esker was deposited in subglacial meltwater tunnels.
A sinuously curving, narrow deposit of coarse gravel that forms along a meltwater stream channel, developing in a tunnel within or beneath the glacier. The ice-contact margins of the esker are often slumped and mixed with till.
(geology) a long winding ridge of post glacial gravel and other sediment; deposited by meltwater from glaciers or ice sheets
a formation left by sandy river sediment from the last ice age
a kind of odd-shaped small hill which is found in territory where a large glacier has melted
a long elevated, winding ridge of gravel or sand that snakes across the countryside
a long, narrow, often winding ridge composed of water-lain deposits of sand, gravel, and boulders which formed as a stream deposit in a tunnel within or at the base of a retreating glacier
a long, narrow ridge of earth and stone deposited by a stream that was flowing in an ice-walled valley or tunnel left by the retreating glaciers
a long, narrow, steep-sided ridge of sand and gravel deposited by streams flowing between the icy walls of two glaciers, or through a meltwater tunnel inside a glacier
a long, sinuous hill created by sediments deposited along a glacial stream
a long, steep-sided, narrow ridge of coarse gravel deposited by a stream flowing in or under a decaying sheet of glacial ice, usually found in an open channel
a long, winding ridge of sand and gravel that can reach up to one-hundred feet (thirty meters)
a narrow ridge of stratified material (till that has been sorted and deposited in layers according to grain size by running water)
a narrow, winding ridge of gravel or sand, deposited by the melting waters under a glacier
a ridge of gravel left behind from the ice age)
a sinuous ridge made up of sand and gravel, formed in a meltwater tunnel under a glacier
A meandering, water-deposited, generally steep-sided sediment ridge that forms within a subglacial or englacial stream channel. Its floor can be bedrock, sediment, or ice. Subsequent melting of the glacier exposes the deposit. Generally composed of stratified sand and gravel, eskers can range from feet to miles in length and may exceed 100 feet in height.
Winding ridges of gravel and sand. Left behind by meltwater from a retreating glacier or ice sheet.
Long, sinuous, steep-sided ridge, comprising layers of sediments (cross-bedded sands and gravels) laid down by glacial meltwaters
A sinuous ridge formed of rounded sand and gravel deposited by the streams that flowed through tunnels at the base of the glacier. The Parnell Esker in the Northern Kettle Moraine is the most-famous. Other notable eskers are in Polk and Taylor counties.
ES-kur Extensive ridge of gravel and sand deposited by a river that ran under a glacier. 878
A long, narrow, sinuous ridge of sand and gravel deposited by a meltwater stream flowing upon, within, or beneath a glacier that is melting away.
A narrow, winding ridge made of gravel usually formed by streams flowing on a glacier or in a tunnel below the glacier or ice sheet.
Sinous ridge composed largely of sand and gravel deposied by a stream flowing in a tunnel beneath a glacier near its terminus.
A long, low, narrow, sinuous, steep sided ridge or mound composed of irregularly stratified sand and gravel that was deposited by a subglacial or englacial stream flowing between ice walls or in an ice tunnel of a continuously retreating glacier, left behind when the ice melted.
Linear type of ice-contact stratified deposit formed in subglacial channels and commonly having a sharply peaked ridgelike profile in cross section.
an elongated ridge deposited by meltwater in a glacial channel.
a long, winding ridge of sand and gravel deposited by meltwater rivers flowing through the ice of a glacier.
n. A ridge of glacial sediment deposited by a stream flowing in and under a melting glacier.
A long, narrow, often curving ridge or mound of sand, gravel and boulders deposited by a stream flowing on, within or beneath a stagnant glacier.
A long, snakelike ridge of sediment deposited by a stream that ran under or within a glacier.
long, narrow, high ridge of sand and gravel representing ice-contact deposits of some kind of melt-water stream or delta; generally normal to ice margin, behind major end moraines.
A long ridge of material deposited from meltwater streams running subglacially, roughly parallel to the direction of ice flow.
A winding ridge made of sand and gravel deposited by a melting glacier.
a sinuous ridge of sedimentary material (typically gravel or sand) deposited by streams that cut channels under or through the glacier ice.
A long narrow ridge, chiefly of gravel and sand formed by a melting glacier or ice sheet.
Eskers are long, winding ridges of stratified sand and gravel which occur in glaciated and formerly glaciated regions of Europe and North America. They are frequently several miles in length and, because of their peculiar uniform shape, somewhat resemble railroad embankments. Eskers are the deposits left by streams which flowed within and under glaciers; after the retaining ice walls melt away, the stream deposits remain as long winding ridges.They can reach hundreds of kilometers in length.
See Eschar.