Pobiti Kamani

Pobiti Kamani (Bulgarian: Побити камъни, "planted stones"), tubular concretions formed around "rising methane-bearing fluid plumes", is a desert-like rock phenomenon located on the north west Varna Province border in Bulgaria. The stone pillars were first described by Russian archaeologist and historian Victor Teplyakov in 1829. In order to be preserved, Pobiti Kamani was designated a natural landmark in the late 1930s. There are a number of theories regarding the phenomenon's origin. The pioneering hypotheses can be divided roughly into two groups: suggesting an organic or abiotic origin. According to the former, the formations are the result of coral activity (but detail investigation shows no coral), while the latter explains the phenomenon with the prismatic weathering and desertification of the rocks, the formation of sand and limestone concretions, or lower Eocene bubbling reefs. Based on a petrographic and stable isotope geochemical study and field observations, evidence exists that these structures represent an exceptional record of paleo-hydrocarbon seep system (low magnesium calcite cements are strongly depleted in heavy carbon isotope 13C). The pathways of fluid circulation are recorded as columns set in sands, which columns after recent sand removal produced a desert-like landscape. The dynamic reconstruction of the origin of these structures, the processes of fluid migration and microbial mediation of hydrocarbon oxidation leading to carbonate precipitation have been studied by De Boever et al. (2009). Pobiti Kamani occupies an area 8 km (5.0 mi) long and 3 km (1.9 mi) wide, running from north to south. There are seven groups of stone pillars. For example, "Dikilitash", the main group, includes over 350 stones. "Strashimirovo" features four rows of stones that are distinctive for their "bulging" middle segments. In September 2020, Reuters reported that an image of Pobiti Kamani, photoshopped red, circulated social media under false claims that it was an "original NASA photo of Mars". Gallery References External links Pamouktchiev, Angel (1999). "A new point of view over the phenomenon "Pobitite kamani" ("Dikilitash") near Varna". Annuaire de l'Université de Sofia "St. Kliment Ohridski", Faculté de Géologie et Géographie (in Bulgarian, French, and English). 90 (1 - Géologie): 10–26. Retrieved 8 April 2024. Spratt, Thomas Abel Brimage (1857). "On the Geology of Varna, and the Neighbouring parts of Bulgaria". Quarterly Journal of the Geological Society. 13: 73-83. Retrieved 8 April 2024 – via Internet Archive. Toula, Franz (1890). "Geologische Untersuchungen im östlichen Balkan und in den angrenzenden Gebieten". Denkschriften der Kaiserlichen Akademie der Wissenschaften, Mathematisch-Naturwissenschaftliche Classe (in German) (57). Wien: 366– 377. Retrieved 8 April 2024 – via Internet Archive. Pobiti Kamani - Photo gallery The Stone Forest - photo: I.Generalov Prodanov, Bogdan; Keremedchiev, Stoyan; Dimitrov, Lyubomir; Andreeva, Nataliya (2019-08-24). "Seabed Morphology of the Varna Bay Coastal Zone, Bulgarian Black Sea". Proceedings of the Bulgarian Academy of Sciences. doi:10.7546/crabs.2019.08.10. S2CID 202178264. Nachev, I. K. 1995. The Reserve “Pobitite Kamani” (Upright Stones) near Varna as a geological Site of Special Scientific Importance (Eocene agglutiherms). – First Subregional Meeting “Conserv. Geol. Heritage in South-Easth Europe”, Sofia, 1995;