The Forgotten Volcanoes in Slovakia; Vihorlat & Poľana

Описание: Approximately 10.5 million years ago, a powerful volcanic eruption occurred on the border of Slovakia and Ukraine. This erupted formed a 3.5 kilometer wide depression in the ground referred to as a caldera, which occurred at the easternmost of the 5 Vihorlat Hills volcanoes. And, only 3.5 million years earlier, an ancient volcano in the central part of the country had risen to 3500 meters in height. While all of these aforementioned volcanoes are now extinct and will never erupt again, they left behind numerous interesting geologic formations.

Disclaimer: I am being paid to make this video by the European Union and NS Kožare as part of a series meant to share several wonderful geologic features within the nation of Slovakia.

Thumbnail Photo Credit: Coombs, M. L., Alaska Volcano Observatory / U.S. Geological Survey, https://avo.alaska.edu/images/image.p.... This image was then overlaid with text, and then overlaid with GeologyHub made graphics (the image border and the GeologyHub logo).

Note: This video's thumbnail image displays what the Pol'ana volcano may have looked like 14.7 million years ago. This is done by showing Alaska's Augustine volcano via a photograph taken in 2013.

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Google Earth imagery used in this video: ©Google & Data Providers

This video is protected under "fair use". If you see an image and/or video which is your own in this video, and/or think my discussion of a scientific paper (and/or discussion/mentioning of the data/information within a scientific paper) does not fall under the fair use doctrine, and wish for it to be censored or removed, contact me by email at [email protected] and I will make the necessary changes.

Various licenses used in sections of this video (not the entire video, this video as a whole does not completely fall under one of these licenses) and/or in this video's thumbnail image:
Public Domain: https://creativecommons.org/publicdom...

Sources/Citations:
[1] Pécskay, Zoltán & KALIČIAK, M. & KONEČNÝ, V. & Lexa, Jaroslav & EC, B.. (2002). GEOCHRONOLOGY OF THE NEOGENE VOLCANISM IN THE VIHORLATSKE VRCHY MOUNTAIN RANGE, EASTERN SLOVAKIA.
[2] Konečný, V & Balogh, Kadosa & Orlický, O & Vass, D & Lexa, Jaroslav. (1999). TIMING OF THE NEOGENE—-QUATERNARY ALKALI BASALT VOLCANISM IN CENTRAL AND SOUTHERN SLOVAKIA (WESTERN CARPATHIANS). Geolines. 9.
[3] CHERNYSHEV, IGOR & KONEČNÝ, VLASTIMIL & Lexa, Jaroslav & Kovalenker, V. & Jelen, S. & Lebedev, V. & GOLTSMAN, YURIJ. (2013). K-Ar and Rb-Sr geochronology and evolution of the Štiavnica Stratovolcano (Central Slovakia). Geologica Carpathica. 64. 327-351. 10.2478/geoca-2013-0023.
[4] Geological Map of the Slovak Republic at scale 1:50 000, geology.sk
[5] Source of Volcanic Explosivity Index (VEI) methodology and criteria: Newhall, C. G., and Self, S. (1982), The volcanic explosivity index (VEI) an estimate of explosive magnitude for historical volcanism, J. Geophys. Res., 87(C2), 1231–1238, doi:10.1029/JC087iC02p01231. Accessed / Read by    / geologyhub   on Oct 5th, 2022
[6] USGS Denver Library Photographic Collection

0:00 Sponsored Message
0:12 Wood Opal
2:31 Poľana
3:42 Vihorlat Hills
4:11 Andesite Lava