sinkhole

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sinkhole

a depression in the ground in which water collects and disappears below the surface, e.g. in limestone areas where a cave roof has collapsed.
References in periodicals archive ?
A large "Tiankeng," a karst doline (Yangaotuo doline), can be found on the ground above the tunnel (Figures 3 and 4(a)).
Many researchers have followed a morphological approach, which mainly stressed morphological and morphometric criteria in delineating a tiankeng as a type of giant doline, and they distinguished collapse and erosional tiankengs as sub-types (Klimchouk 2005; Shui et al.
Lines with the omission of stress on the second S-position: V doline tishim glubokoi, model--0.159, verse--0.157.
Osobennosti morfologii stroeniya i formirovaniya prolyuviya krupnogo konusa vynosa v drevnej doline reki Gauya [Morphological characteristics and development of the old gully fan in the Gauja River valley].
Three depth profiles to lithic contact 20 m apart came from a transect across a gentle side-slope leading to a doline, ~100 m from the entrance to the Predator Cave predator site.
Of course, similar conditions have been described before: our findings are strongly reminiscent of those of the Laguna de la Cruz, a karstic doline, near Cuenca, in Spain (as described by Vicente & Miracle 1988).
We recognized two water-plant communities according to water flow: the lotic community of Ranunculus pseudofluitans, restricted to the sand bed of La Yesera stream in the eastern part of the Station; and the lentic community of Ranunculus peltatus, found in some pools of doline origin.
Meyer, 1852) from lacustrine sediments of the Oberleichtersbach doline (Lower Franconia, Bavaria, Germany) are reported.
In the Passismanua area and part of the Lamogai Plateau, it forms a dissected karst plateau of massive coral-algal limestone with numerous dolines and saucer-shaped depressions resulting from doline collapse.
The doline collapse in anhydritic-gypsiferous soils and rocks is a typical case of sulphate-based mineral dissolution conducing to ground loss and instabilities of existing structures.
A large karst terrain forms topographical characteristics in this region: there are 1124 cavities (called Doline) with level planar areas of 100-300 m diameter, surrounded by 3570 steep mountains with elevations of 600-1000 m above sea level and steep slopes of 30-40[degrees].
Playwright and poet Lizzie Nunnery and novelist Gwen doline Riley will appear at the Everyman Bistro on Friday.