esker
Ice-tunnel sediment trail
An esker is a long, winding ridge of gravel and sand deposited by a stream flowing beneath a glacier.
As the glacier melts, the sediment that filled the ice tunnel remains as a raised, snake-like formation across the landscape.
Eskers are common in formerly glaciated regions like Scandinavia, Canada, and Ireland: We hiked along the esker through the bogland.
Narrow raised strip
- sinuousCurving in flowing turns
- windingCurving repeatedly, sinuous
- serpentineCurving in repeated bends
- gravelLoose small rock fragments
sand · stratified · mound · elevation · terrain · topography · geomorphology · undulating
Loose small rock fragments
- sandFine rock particles
- siltWaterborne earth particles
- cobbleWorn stone for paths
- boulderLarge weathered stone
pebble · stratified · sorted · deposits · alluvium · drift · clast · deposition
Glacier-deposited debris pile
- drumlinStreamlined glacial hill
- outwashGlacier meltwater sediment
- tillRegister drawer for money
- meltwaterWater from melted ice
subglacial · terminal · recessional · glaciofluvial · kettle · erratic · crevasse · ablation
ridge
Narrow raised strip
- sinuousCurving in flowing turns
- windingCurving repeatedly, sinuous
- serpentineCurving in repeated bends
gravel · sand · stratified · mound · elevation · terrain · topography · geomorphology · undulating · elongated
gravel
Loose small rock fragments
boulder · pebble · stratified · sorted · deposits · alluvium · drift · clast · deposition · layered
moraine
Glacier-deposited debris pile
meltwater · subglacial · terminal · recessional · glaciofluvial · kettle · erratic · crevasse · ablation · lodgement
meltwater
Water from melted ice
- tunnelEnclosed underground route
- conduitTube conveying fluid or cables
- subglacialBeneath a glacier
drainage · channel · stream · aquifer · groundwater · recharge · permeable · watershed · flow · discharge
- ridgesridge, mountain ridge, ridgeline, knife-edge, mid-ocean ridge
- Winter Terrainsnow, ice field, snowdrift, snowpack, frozen tundra
- glaciersglacier, crevasse, glacial movement, moraine, iceberg
- Canadian Shieldboreal forest, glacial lakes, Hudson Bay, Lake Superior, metamorphic rock
- erosionerosion, wearing, wearing down, beach erosion, river erosion
- geological formationsmineral deposit, ore deposit, coal deposit, oil deposit, gold deposit