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 ?
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.
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.
Meyer, 1852) from lacustrine sediments of the Oberleichtersbach doline (Lower Franconia, Bavaria, Germany) are reported.
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.
About 16,000 persons reside in this region, near approximately 300 Doline.
Playwright and poet Lizzie Nunnery and novelist Gwen doline Riley will appear at the Everyman Bistro on Friday.
Pajki iz gornjega dela selske doline termofilni bukov gozd nad zalim logom, 650 m.
A core sample performed at the bottom of the temporary doline lake near the Cerca Grande outcrop revealed two discrete dark organic levels, the upper one at 50 cm depth, the lower at 210 cm.
lezat' i rune v zemle syroj")--a time when "the sad tune over me / In the valley the wind will disperse" ("napev unylyj nado mnoj / V doline veter razneset").
At Ngarua, there are no cliffs so 5 transects encompassing a variety of slopes and aspects were taken at right angles to a line running down-slope between the cave containing the predator deposit and a doline on one side, and a doline and a low rise on the other side.