Publication details

Basaltic Dyke with Specific Volcanogenic Structures and its geomorphic evolution: Unique Geoheritage of the Faroe Islands (North Atlantic Ocean)

Authors

RAŠKA Pavel POKORNÝ Richard KRMÍČEK Lukáš KUBOUŠKOVÁ Simona MORTENSEN Lis

Year of publication 2019
Type Article in Periodical
Magazine / Source Geoheritage
MU Faculty or unit

Faculty of Science

Citation
web
Doi http://dx.doi.org/10.1007/s12371-018-0296-x
Keywords Palaeogene volcanism; Geoheritage; Sandfelli dyke; Pseudo-hieroglyphs; Columnar jointing; Faroe Islands
Attached files
Description 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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