hummock

(redirected from hummocks)
Also found in: Dictionary, Thesaurus.
Related to hummocks: hummocky, hummocked ice

hummock

1. a hillock; knoll
2. a ridge or mound of ice in an ice field
3. Chiefly southern US a wooded area lying above the level of an adjacent marsh

Hummock

 

a pileup of fragments of ice floes on the ice cover of seas, rivers, and lakes. Hummocks are caused by the lateral pressure of ice fields on one another and on the shoreline and shoals, which results in fragmentation of the edges of the fields. Hummocks are most common in the East Siberian and Chukchi seas and in the open part of the Arctic Ocean, where their height sometimes exceeds 8–9 m (in coastal areas it may reach 15–20 m).

Among the forms of hummock development that are distinguished are ridges (in solid drifting ice), barriers (hummock ridges on the margin of the shore ice, occasionally resting on the bottom), standing floes (ropaks), and stamukhi (individual pile-ups on shoals). The degree of development of hummocks is measured on a five-point scale; 0 indicates a completely smooth ice sheet, and 5 means that the ice sheet is completely covered with hummocks.

hummock

[′həm·ək]
(ecology)
A rounded or conical knoll frequently formed of earth and covered with vegetation.
(geology)
A rounded or conical knoll, mound, hillock, or other small elevation, generally of equal dimensions and not ridgelike. Also known as hammock.
(hydrology)
A mound, hillock, or pile of broken floating ice, either fresh or weathered, that has been forced upward by pressure, as in an ice field or ice floe.
References in periodicals archive ?
This suggests that initially the ridges may have had the form of a DeGeer moraine, or hummocks of diamicton.
Among the best in autumn is Stipa gigantea, or golden oats, originally from Spain and Portugal, which forms neat hummocks of narrow mid-green leaves to 70cm (28in) long, carrying clouds of green flowers on erect stems to 1.
These surveys are for identification of catchments, topography, soil profiles, vegetation, hummocks, seepage, evaporation, development of catchments and design of reservoirs for drinking of human and livestock population.
Before the sand was placed, the team removed 11,000 hummocks (mounds of earth and vegetation) from low-lying areas of the marsh island.
Each canvas undulates with dips and hummocks -- a miniature landscape created by paint thickened with sand it sometimes cracks open, revealing raw insides.
This will eventually be surrounded by mossy hummocks of dwarf pines, Japanese maples, and bamboo.
Moss clumps are often at the bases of trees, on fallen logs and limbs, on hummocks of herbaceous vegetation (Fig.
And so, the seal-woman that I do quite often was originally from a dream, combing her hair up on the little hummocks on a mountain.
Geo-electrical soundings reveal the existence of permafrost in rock glaciers from Retezat Mountains, the depth of active layer, typical internal structure of periglacial deposits and the freezing regime of the sediments inside earth hummocks.
Resort managers told us that ski-run grading reduces surface depressions, hummocks, and boulders, which means that less snow--about 20 inches on average--is required to open a graded run than a comparable cleared run.
Wide open spaces on an undulating hill, pitted with gullies and hummocks, offered a stern test of handler and dog.