Sinkhole Dersios
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The Dersios sinkhole (Greek: Σπηλαιοκαταβόθρα "Ο Δέρσιος" ''Spilaiokatavothra "O Dhersios"'') is a
sinkhole A sinkhole is a depression or hole in the ground caused by some form of collapse of the surface layer. The term is sometimes used to refer to doline, enclosed depressions that are also known as shakeholes, and to openings where surface water ...
in Arcadia,
Greece Greece, officially the Hellenic Republic, is a country in Southeast Europe. Located on the southern tip of the Balkan peninsula, it shares land borders with Albania to the northwest, North Macedonia and Bulgaria to the north, and Turkey to th ...
. The sinkhole, which has a depth of , has been known since antiquity and is located towards the north end of the
plateau In geology and physical geography, a plateau (; ; : plateaus or plateaux), also called a high plain or a tableland, is an area of a highland consisting of flat terrain that is raised sharply above the surrounding area on at least one side. ...
of
Palaiochora Palaiochora () is a small town in Chania regional unit, Greece. It is located 70 km south of Chania, on the southwest coast of Crete and occupies a small peninsula 400 m wide and 700 m long. The town is set along 11 km of coastline bor ...
at a height of 750 m above sea level on mount
Parnon Parnon or Parnonas () or Malevos (Μαλεβός) is a mountain range, or massif, on the east of the Laconian plain and the Evrotas Valley. It is visible from Athens above the top of the Argive mountains. The western part is in the Laconia pre ...
. It is about 45 minutes on unsurfaced road from the nearest town of
Tyros Tyre (; ; ; ; ) is a city in Lebanon, and one of the oldest continuously inhabited cities in the world. It was one of the earliest Phoenician metropolises and the legendary birthplace of Europa, her brothers Cadmus and Phoenix, and Carthage's ...
in the
Kynouria Cynuria ( – ''Kynouria'' or – ''Kynouriake'') is an ancient district on the eastern coast of the Peloponnese, between the Argolis and Laconia, so called from the Cynurians, one of the most ancient tribes in the peninsula. It was believed to ...
region of Arcadia. The sinkhole was first explored in August 1974 to a depth of by a French team (in collaboration with the Hellenic Speleological Society). Since 2003, SELAS caving club in Greece has been exploring the
cave Caves or caverns are natural voids under the Earth's Planetary surface, surface. Caves often form by the weathering of rock and often extend deep underground. Exogene caves are smaller openings that extend a relatively short distance undergrou ...
, doubling the depth and more than tripling the length of the sinkhole. The new discoveries were made in 2003 by
cave diving Cave-diving is underwater diving in water-filled caves. It may be done as an extreme sport, a way of exploring flooded caves for scientific investigation, or for the underwater search and recovery, search for and recovery of divers or, as in th ...
the first
sump Sump may refer to: * An infiltration basin used to manage surface runoff water and recharge underground aquifers * Sump (cave), a permanently flooded section of a cave, where an underground flow of water exits the cave into the earth such that t ...
and emptying it by
siphon A siphon (; also spelled syphon) is any of a wide variety of devices that involve the flow of liquids through tubes. In a narrower sense, the word refers particularly to a tube in an inverted "U" shape, which causes a liquid to flow upward, abo ...
ing the water and in 2005 by emptying sumps in side passages of the sinkhole.


References

Landforms of Arcadia, Peloponnese Caves of Greece Wild caves Sinkholes of Europe Landforms of Greece Landforms of Peloponnese (region) {{Peloponnese-geo-stub