Earth:Topolnița Cave

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Topolnița Cave
Topolnițsa Cave
Map showing the location of Topolnița Cave
Map showing the location of Topolnița Cave
Location of the cave in Romania
LocationMehedinți County, Romania
Coordinates [ ⚑ ] : 44°49′05.9″N 22°33′46.6″E / 44.818306°N 22.562944°E / 44.818306; 22.562944
Length11–20.5 km (6.8–12.7 mi)
Elevation453 m (1,486 ft)[1]
DiscoveryV. Dumitrescu (1880)
Entrances4
AccessOnce a year (August)
Cave surveyEmil Racoviță Institute of Speleology (1962)

Topolnița Cave (Romanian: Peștera Topolnița) is a karst cave located in Mehedinți County, Romania.[2] It is the fourth-longest cave in Romania: only Peștera Vântului, Humpleu-Poienița Cave, and Hodobana Cave are longer.[3][4] Most speleological sources estimate its length at 20.5 km (12.7 mi),[5][6][7] although a length of 22 km (14 mi) has also been reported.[8] Some Romanian news sources report a more conservative 11,000 metres (36,000 feet).[9][10] It is considered a natural monument of Romania.[11]

The cave was first historically documented in 1880 by V. Dumitrescu.[10] The first serious attempt at scientific exploration was made in 1956 by Sever Popescu of Turnu Severin. Finally, specialists from the Emil Racoviță Institute of Speleology at the Romanian Academy began true systematic exploration in 1962.[9]

Description

Topolnița Cave is located at 30 kilometres (19 mi) from Drobeta-Turnu Severin, between the villages of Marga and Cireșu.[9] It has at least four entrances.[6] The cave's primary entrance is in the central part of the Mehedinți Plateau, where the Topolnița River plunges 50 m (160 ft) down into the earth.[2] The river later emerges farther downstream at the foot of a hill.

Topolnița Cave has a huge number of passages and galleries arranged over five floors, many of which have attracted fanciful names as a result of the speleothems that have formed in them.[9] One of the largest galleries, at 1,570 m (5,150 ft) long, is named the Racoviță Gallery in honor of Emil Racoviță, a noted Romanian explorer.[2][12] Approximately 100–150 m (330–490 ft) from the entrance is the Bat's Gallery, containing a bat colony and a large guano heap.[13] Other features within the cave include lakes, waterfalls, rapids, and massive forests of stalactites and stalagmites.[10] Neolithic remains have also been found within the cave.[10]

Cave access

Best described as "labyrinthine", Topolnița Cave is a difficult cave to explore even for experienced cavers.[14][15] Access for tourists is permitted only once per year, on a feast day in August, where guides lead tours 100 m (330 ft) into the cave to view the Racoviță Gallery.[10][16] Otherwise, the cave is gated and access is only available by permission of the Romanian Academy.[12] In the 1980s, there was some government interest in adding tourist-access features such as stairs, railings, and electric lights, but funding fell through before the Romanian Revolution and nothing was completed.[16]

Fauna

The cave's temperature hovers between 8.2–10.8 °C (46.8–51.4 °F), making it a relatively warm cave.[9] As a result, it is a suitable habitat for some fauna, including the largest colony of greater horseshoe bats in Europe.[17] A 2015 survey conducted as part of an effort to protect Romania's bats found 7,482 individual horseshoe bats living in the cave.[17] The colony in the Bat's Gallery is mainly composed of insectivorous Mediterranean horseshoe bats, Daubenton's bats, and long-fingered bats.[13] Radiocarbon dating has shown that the bat guano from that colony has been continuously deposited since 1694.[13]

In 2009, a pair of bearded vultures was spotted at the cave by hunters. The sighting was treated with some excitement, as the bearded vulture is no longer extant in Romania.[18]

Plenty of invertebrate species live in or around Topolnița Cave. Specimens of Clausiliidae, or door snails, such as Macedonica marginata, have been found in the cave.[19] A number of species of Opiliones, colloquially known as harvestmen, have been recorded.[20]

References

  1. ↑ Google Maps Elevation Finder
  2. ↑ 2.0 2.1 2.2 Scheffel, Richard L., ed (1980). Natural Wonders of the World. United States of America: Reader's Digest Association, Inc. pp. 386. ISBN 0-89577-087-3. 
  3. ↑ "All you have to know about caving in Romania" (in en-US). Travel Guide Romania. 2013-05-29. https://travelguideromania.com/all-you-have-to-know-about-caving-in-romania/. 
  4. ↑ "Statistici interesante despre peşterile din România" (in ro). https://www.speologie.org/statistici. 
  5. ↑ "Peştera Topolnița" (in ro). https://www.speologie.org/pestera-topolnita. 
  6. ↑ 6.0 6.1 Courbon, Paul (1989) (in en). Atlas of the Great Caves of the World. Cave Books. ISBN 9780939748211. https://books.google.com/books?id=3Ap_AAAAMAAJ&q=topolnita. 
  7. ↑ Gunn, John (2004) (in en). Encyclopedia of Caves and Karst Science. Taylor & Francis. ISBN 9781579583996. https://books.google.com/books?id=bhiJ10Xx9VwC&q=topolnita&pg=PA681. 
  8. ↑ Goran, Cristian; Povară, Ioan (2019), Ponta, Gheorghe M. L.; Onac, Bogdan P., eds., "Mehedinti Plateau: Epuran-Topolnita Karst System" (in en), Cave and Karst Systems of Romania, Cave and Karst Systems of the World (Springer International Publishing): pp. 183–201, doi:10.1007/978-3-319-90747-5_23, ISBN 9783319907475 
  9. ↑ 9.0 9.1 9.2 9.3 9.4 "O minune puţin cunoscută – Peștera Topolnița a doua ca lungime din România" (in ro). Adevărul. 2013-06-07. http://adevarul.ro/locale/turnu-severin/o-minune-putin-cunoscuta-pestera-topolnita-doua-lungime-romania-1_51b0d74ec7b855ff56661a92/index.html. 
  10. ↑ 10.0 10.1 10.2 10.3 10.4 "Reportaj Mehedinți: Peștera Topolnița – sărbătoarea lumii din adâncurile pământului" (in ro). Agerpres. https://www.agerpres.ro/social/2014/08/24/reportaj-mehedinti-pestera-topolnita-sarbatoarea-lumii-din-adancurile-pamantului-17-22-00. 
  11. ↑ Rennon, Rosemary (2007) (in en). Language and Travel Guide to Romania. Hippocrene Books. pp. 371. ISBN 9780781811507. https://books.google.com/books?id=SGNHF0_NISEC&q=topolnita+cave&pg=PA371. 
  12. ↑ 12.0 12.1 "Topolnita, the second longest cave in Romania – The Romania Journal" (in en-GB). http://www.romaniajournal.ro/topolnita-the-second-longest-cave-in-romania/. 
  13. ↑ 13.0 13.1 13.2 Cleary, Daniel M.; Feurdean, Angelica; Tanțău, Ioan; Forray, Ferenc L. (2019-06-01). "Pollen, δ15N and δ13C guano-derived record of late Holocene vegetation and climate in the southern Carpathians, Romania". Review of Palaeobotany and Palynology 265: 63. doi:10.1016/j.revpalbo.2019.03.002. ISSN 0034-6667. 
  14. ↑ (in en) Geologica Balcanica. Izd-vo na Bŭlgarskata akademii︠a︡ na naukite. 1996. https://books.google.com/books?id=UB5PAQAAIAAJ&q=topolnita. 
  15. ↑ "Pestera Topolnita, Pesteri Romania". http://www.inromania.info/pestera-topolnita.html. 
  16. ↑ 16.0 16.1 "Peștera Topolnița își deschide porțile duminică" (in ro-RO). Mehedințeanul. 2017-08-19. http://www.mehedinteanul.ro/2017/08/19/pestera-topolnita-isi-deschide-portile-duminica/. 
  17. ↑ 17.0 17.1 "A record-breaking bat discovery in Romania | Fauna & Flora International" (in en-gb). http://www.fauna-flora.org/a-record-breaking-bat-discovery-in-romania/. 
  18. ↑ "O familie de zăgani a fost văzută la Peștera Topolniței" (in ro-RO). Evenimentul Zilei. http://evz.ro/o-familie-de-zagani-a-fost-vazuta-la-pestera-topolnitei-848914.html. 
  19. ↑ Loosjes, F. E., and A. Negrea. "Contributions to the distribution of the Clausiliidae (Gastropoda, Pulmonta) in the Karst regions of Romania." Zool. Meded 43.4 (1968): 41–55. Via Google Scholar.
  20. ↑ Ilie, Victoria. "A check-list of the harvestmen (Opilionida) from the Romanian caves." Archives of Biological Sciences 54.1–2 (2002): 49–55. Via Google Scholar.



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