Sandstone landforms shaped by negative feedback between stress and erosion

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F14%3A10284628" target="_blank" >RIV/00216208:11310/14:10284628 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985831:_____/14:00432542 RIV/67985891:_____/14:00432542

Výsledek na webu

<a href="http://dx.doi.org/10.1038/NGEO2209" target="_blank" >http://dx.doi.org/10.1038/NGEO2209</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/NGEO2209" target="_blank" >10.1038/NGEO2209</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Sandstone landforms shaped by negative feedback between stress and erosion

Popis výsledku v původním jazyce

Weathering and erosion of sandstone produces unique landforms(1,2) such as arches, alcoves, pedestal rocks and pillars. Gravity-induced stresses have been assumed to not play a role in landform preservation(3) and to instead increase weathering rates(4,5). Here we show that increased stress within a landform as a result of vertical loading reduces weathering and erosion rates, using laboratory experiments and numerical modelling. We find that when a cube of locked sand exposed to weathering and erosionprocesses is experimentally subjected to a sufficiently low vertical stress, the vertical sides of the cube progressively disintegrate into individual grains. As the cross-sectional area under the loading decreases, the vertical stress increases until acritical value is reached. At this threshold, fabric interlocking of sand grains causes the granular sediment to behave like a strong, rock-like material, and the remaining load-bearing pillar or pedestal landform is resistant to further

Název v anglickém jazyce

Sandstone landforms shaped by negative feedback between stress and erosion

Popis výsledku anglicky

Weathering and erosion of sandstone produces unique landforms(1,2) such as arches, alcoves, pedestal rocks and pillars. Gravity-induced stresses have been assumed to not play a role in landform preservation(3) and to instead increase weathering rates(4,5). Here we show that increased stress within a landform as a result of vertical loading reduces weathering and erosion rates, using laboratory experiments and numerical modelling. We find that when a cube of locked sand exposed to weathering and erosionprocesses is experimentally subjected to a sufficiently low vertical stress, the vertical sides of the cube progressively disintegrate into individual grains. As the cross-sectional area under the loading decreases, the vertical stress increases until acritical value is reached. At this threshold, fabric interlocking of sand grains causes the granular sediment to behave like a strong, rock-like material, and the remaining load-bearing pillar or pedestal landform is resistant to further

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DB - Geologie a mineralogie

OECD FORD obor

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Projekt

<a href="/cs/project/GA13-28040S" target="_blank" >GA13-28040S: Multi-disciplinární studium procesů v pískovcových výchozech: nový přístup k výzkumu a interpretaci vzniku vybraných pískovcových forem</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Nature Geoscience

ISSN

1752-0894

e-ISSN

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Svazek periodika

7

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

5

Strana od-do

598-602

Kód UT WoS článku

000341635100019

EID výsledku v databázi Scopus

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