But most swallow holes when dry are represented by a jumble of rocks, clothed with blackish and dried aquatic mosses (, the turlough moss, and, usually found in streams ).
12.
Like most of the Dinaric Alps, the park is dominated by limestone and dolomite rocks and shows major karst features : ponikve, karren on bare rocks, rock falls, swallow holes, caves and so on.
13.
Its chief geographical features are swallow holes, limestone caves containing stalactites including Pollnagollum Cave and Slieve Rushen mountain, on whose south-eastern slope it lies, reaching an altitude of 1, 005 feet above sea-level.
14.
A swallet, also known as a sinkhole, sink, shakehole, swallow hole or doline, is a natural depression or hole in the surface topography caused by the removal of soil or bedrock, often both, by water flowing beneath.
15.
When the Dorking to Leatherhead railway was constructed in 1859, a fossilised swallow hole was discovered in the cutting at the south end of Box Hill and Westhumble railway station, suggesting that even in its early history, the river had swallow holes.
16.
When the Dorking to Leatherhead railway was constructed in 1859, a fossilised swallow hole was discovered in the cutting at the south end of Box Hill and Westhumble railway station, suggesting that even in its early history, the river had swallow holes.
