In karst areas, a sinkhole, sink, or doline is a closed depression draining underground.
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These shallow solution basins, or closed depressions, tend to form on bare limestone or silicate rock.
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The lakes as well as nearby marshes and closed depression, covers, which makes it larger than the state of Connecticut.
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Associated with the Forest's geologic activity are several natural springs and small marshes found in closed depressions, known as sag ponds.
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The county is home to a number of karst formations, most notably at Grassy Cove, a large, closed depression located southeast of Crossville.
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The tubular spring struts retract into shallow channels along the bottom of the fuselage and the wheels fit snugly in closed depressions on the underside of the fuselage.
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Lost Creek Cove is a polje, a geologic feature that consists of a very large, closed depression in karst topography where all the water drains underground.
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Rather allochthonous objects, objects which were moved and washed into cavities, transported into fissures or caves might be archive elements of early karst activity and tectonic stages of nearby large closed depressions.
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However, recent empirical research ( ~ 2009 ) revised poor mainstream definitions, stating that & uvalas are large ( in km scale ) karst closed depressions of irregular or elongated plan form resulting from accelerated corrosion along major tectonically broken zones . This is arguing for the re-introducing of uvalas into modern karstology -distinguishing them from dolines and poljes in size ( typically ) and also in morphology and combination of genetic factors , which give them a status of a particular karst relief form .
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