natural depression


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Noun1.natural depression - a sunken or depressed geological formation
basin - a natural depression in the surface of the land often with a lake at the bottom of it; "the basin of the Great Salt Lake"
bed, bottom - a depression forming the ground under a body of water; "he searched for treasure on the ocean bed"
crater - a bowl-shaped depression formed by the impact of a meteorite or bomb
geological formation, formation - (geology) the geological features of the earth
hollow, hole - a depression hollowed out of solid matter
lowland - low level country
sinkhole, swallow hole, sink - a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof
oceanic abyss, trench, deep - a long steep-sided depression in the ocean floor
trough - a narrow depression (as in the earth or between ocean waves or in the ocean bed)
vale, valley - a long depression in the surface of the land that usually contains a river
natural elevation, elevation - a raised or elevated geological formation
References in periodicals archive ?
Gorano area is a natural depression with two natural dykes while two more had to be built.
Reporting on work conducted from 2003 to 2012 in a collaborative project involving several universities, archaeologists present findings from the Desert Fayum, a natural depression separated from the Nile Valley by a ridge known as the Nile-Fayum divide.
Like Arecibo, the telescope sits inside a natural depression in limestone-dominated terrain.
Tenders are invited for Seeking conceptual design services for the retrofit of a natural depression into a gravel wetland.
Since few areas in Wales escape spring frosts, the short answer is to avoid growing fruit in frost pockets where cold air collects, whether in a natural depression, at the bottom of a slope, or created artificially by a wall or hedge preventing cold air to escape.
The Fayoum Oasis is a natural depression in Egypt's Western Desert which enjoys unique natural characteristics and a variety of environments (rural, with its lush and varied cultivation, desert and lake).
Hammal Lake is a natural depression in the plains filled by torrential rains on Khirthar mountains, with a capacity of 0.
An acidic pond took shape from rain and runoff flowing into a natural depression in the land.
Striant SR is a unique formulation of native testosterone delivered in a small patch-like tablet which adheres to the buccal mucosa, the small, natural depression in the mouth where the gum meets the upper lip above the incisor teeth.
Location: Noairs are one of the most famous landmarks in the city of Hama, 210 km (130 miles) north of Damascus, set on the banks of the Orantes River in a natural depression.
As with another natural depression treatment--exposure to bright light--there has been a large change in the level of vigorous physical exercise experienced since humans were hunter-gatherers or engaged primarily in agriculture.
There is a natural depression in the land when you first enter it, and the sound of the modern city just passes unheard overhead and suddenly you realize you are in a quiet place.