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Basaltic Dyke with Specific Volcanogenic Structures and Its Geomorphic Evolution: Unique Geoheritage of the Faroe Islands (North Atlantic Ocean)

Authors
  • Raška, Pavel1
  • Pokorný, Richard2, 3
  • Krmíček, Lukáš3, 4, 5
  • Kuboušková, Simona3
  • Mortensen, Lis6
  • 1 Jan Evangelista Purkyně University, Faculty of Science, České mládeže 8, Ústí nad Labem, 400 96, Czech Republic , Ústí nad Labem (Czechia)
  • 2 Jan Evangelista Purkyně University, Faculty of Environment, Králova Výšina 3132/7, Ústí nad Labem, 400 96, Czech Republic , Ústí nad Labem (Czechia)
  • 3 Masaryk University, Department of Geological Sciences, Faculty of Science, Kotlářská 2, Brno, 611 37, Czech Republic , Brno (Czechia)
  • 4 Institute of Geology of the Czech Academy of Sciences, Rozvojová 269, Prague 6, 165 02, Czech Republic , Prague 6 (Czechia)
  • 5 Brno University of Technology, Faculty of Civil Engineering, AdMaS Centre, Veveří 95, Brno, 602 00, Czech Republic , Brno (Czechia)
  • 6 Jarðfeingi, Faroese Geological Survey, Brekkutún 1, Hoyvík, FO-188, Faroe Islands , Hoyvík (Faroe Islands)
Type
Published Article
Journal
Geoheritage
Publisher
Springer Berlin Heidelberg
Publication Date
Mar 23, 2018
Volume
11
Issue
2
Pages
417–426
Identifiers
DOI: 10.1007/s12371-018-0296-x
Source
Springer Nature
Keywords
License
Yellow

Abstract

Volcanic landforms resulting from Cenozoic volcanism represent the most peculiar features of global geodiversity and provide eminent narratives for geoeducation. Among them, however, relict volcanic forms and site-specific landforms in remote areas have received less attention. In this paper, we provide the first description of unique volcanogenic features (hereinafter referred to as pseudo-hieroglyphs) developed on a summit rock wall at the Sandfelli ridge near the village of Gjógv in the N Eysturoy Island (Faroe Islands). The geomorphic evolution of the ridge and rock wall during the Quaternary is described and detailed petrographic analyses of the volcanogenic features are provided. Based on observed petrographical features, we interpret the pseudo-hieroglyphs to probably represent unique examples of chaotic horizontal columnar jointing. Following the geomorphological and petrographic examination of the study site, we analyse current Faroese legislation aiming at nature conservation and use this case to discuss broader implications of geoheritage conservation and geotourism in distant regions.

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