Quantitative study of a rapidly weathering overhang developed in an artificially wetted sandstone cliff

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F17%3A00475846" target="_blank" >RIV/67985831:_____/17:00475846 - isvavai.cz</a>

Alternative codes found

RIV/67985891:_____/17:00475846 RIV/00216208:11310/17:10331793

Result on the web

<a href="http://dx.doi.org/10.1002/esp.4016" target="_blank" >http://dx.doi.org/10.1002/esp.4016</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1002/esp.4016" target="_blank" >10.1002/esp.4016</a>

Result language

angličtina

Original language name

Quantitative study of a rapidly weathering overhang developed in an artificially wetted sandstone cliff

Original language description

Those factors controlling the weathering and erosion of sandstone on the field scale are still not well understood. In this study, a specific sandstone overhang (and its surroundings) with artificially induced and extremely high erosion rates was subjected to a complex investigation. Contrast between the erosion rate of the wet and dry portions of the same cliff enabled isolation of the factors responsible for rapid sandstone retreat. Erosion rates, moisture, and salt content, as well as suction were monitored in the field. Mineral phases and water chemistry were analyzed. The measurement of tensile strength, laboratory frost weathering tests, and numerical modeling of stress were performed. The acquired data show that an increase of moisture content in pores in the area of the studied overhang decreased tensile strength of the sandstone to 14% of its dry value, and increases the sandstone weathering and erosion rate, by nearly four orders of magnitude, compared to the same sandstone under natural moisture conditions outside of the cliff area. Consequently, frost weathering, in combination with wetting weakening was found to play a major role in weathering/erosion of the sandstone cliff and overhang. Frost weathering rate in both the laboratory and field increases up to 15 times with decreasing gravity-induced stress. The results also indicate that sandstone landforms in temperate climates may potentially develop very rapidly if the pore space is nearly saturated with water, and will later remain relatively stable when the moisture content decreases. As a general implication, it is suggested that overhangs in Central Europe (and elsewhere) might be the result of rapid frost weathering of nearly saturated sandstone during the Last Glacial.

Czech name

—

Czech description

—

Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10505 - Geology

Project

<a href="/en/project/GA13-28040S" target="_blank" >GA13-28040S: Multi-approach study of processes in sandstone exposures: new view on study and interpretation of selected sandstone landforms</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

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

Name of the periodical

Earth Surface Processes and Landforms

ISSN

0197-9337

e-ISSN

—

Volume of the periodical

42

Issue of the periodical within the volume

5

Country of publishing house

US - UNITED STATES

Number of pages

13

Pages from-to

711-723

UT code for WoS article

000398676700002

EID of the result in the Scopus database

2-s2.0-84988643389