Rockslides


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Rockslides

 

the breaking off and falling of large masses of rock on steep and precipitous slopes of hills, mountains, stream and river valleys, and seashores. Rockslides occur as a result of weakening of the cohesion (integrity) of rocks, mainly under the influence of weathering processes, and the activity of surface and subsurface water. The volume of the largest rockfall, the Usoiskii rockfall, which took place on the Murghab River (Pamirs) in 1911, was about 2.2 billion cu m. A natural dam and Lake Sarezskoe were formed as a result of this rockslide.

References in periodicals archive ?
The studied quarry rockslide was also extensively monitored since 2003 with traditional methods.
(2014) compared rockslides occurrence patterns on the sierras de Talacasto and La Dehesa (western portion of Precordillera Central), to lithology, geological structures, and seismicity records.
Starting with a July 1, 1917 disaster in the Niagara Gorge, in which an avalanche toppled a train into the river killing 12, rockslides have caused fatalities in the gorge on other occasions, including one at Cave of the Winds that killed three tourists.
Jabal Jais road also saw rockslides but luckily no accidents or injuries have been reported.
The Civil Defense also closed down Al-Hada Road in the middle of the week because of rockslides caused by the rain.
Mudslides and rockslides were reported in several areas, with parts of U.S.
Rescue workers were just arriving in the town, after mudslides and rockslides had blocked many of the roads with debris, she said.
Rockslides at a scenic mountainous area near the epicenter injured several people, the agency said.
The road that connects the governorates of Taiz and Sana'a was blocked on Saturday by rockslides that came following heavy rainfall in the Sumara area, arocky plateau in the governorate of Ibb.
Duwaiqa is a informal area east of Cairo that was classified as unsafe because it lies in the valley of the Moqattam mountain and is vulnerable to rockslides, which happened in September 2008, killing 102 people and wounding 250 others.
She said her district has been at risk of rockslides since December 2009.
However, six streets in Lyttelton have been evacuated because of potential rockslides, but Civil Defence believes residents may be allowed back within 24-hours.