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Evolution of natural rock arches: A realistic small-scale experiment
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SYSNO ASEP 0504052 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Evolution of natural rock arches: A realistic small-scale experiment Tvůrce(i) Řihošek, J. (CZ)
Slavík, M. (CZ)
Bruthans, J. (CZ)
Filippi, Michal (GLU-S) RID, SAI, ORCIDZdroj.dok. Geology. - : Geological Society of America - ISSN 0091-7613
Roč. 47, č. 1 (2019), s. 71-74Poč.str. 4 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova natural arches ; arch’s evolution ; numerical analysis ; erosion ; numerical analysis Vědní obor RIV DB - Geologie a mineralogie Obor OECD Geology CEP GA16-19459S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora GLU-S - RVO:67985831 UT WOS 000454902700020 EID SCOPUS 85065083437 DOI 10.1130/G45421.1 Anotace People tend to admire well-developed rock arches and bridges as a symbol of perfection in nature. However, the origin of such arches still remains unclear, with different authors emphasizing different factors as essential. An authentic small-scale physical model of a perfect arch was created in situ from friable sandstone through a simulation of natural erosion. Based on three-dimensional photogrammetric and numerical modeling, we established three evolutionary stages of the modeled arch: the initial, mature, and senile stages. Erosion removed the material from stress shadows, thus exposing the compressed zone of the material, which spans over the discontinuity. From its original lintel thickness with a length ratio of 0.3, the modeled arch thinned out to a ratio of 0.03, which is close to the best-developed natural arches. The erosion rate of the arch surface was relatively low for 90% of its lifespan, but the last 10% was characterized by an abrupt increase in the erosion rate. Our results show that the only conditions essential to producing a delicate arch through erosion are a thin, vertically elongated rock body with an appropriate discontinuity, and a material prone to stress-controlled erosion. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2020 Elektronická adresa https://pubs.geoscienceworld.org/gsa/geology/article/47/1/71/567644/Evolution-of-natural-rock-arches-A-realistic
Počet záznamů: 1