What type of slide is the La Conchita slide?
Table of Contents
- 1 What type of slide is the La Conchita slide?
- 2 When was the last landslide in La Conchita?
- 3 What was the main cause of La Conchita landslide in 2005?
- 4 What type of mass wasting took place in La Conchita?
- 5 What was different about the 2005 slide at La Conchita compared to the 1995 slide in the same place?
- 6 What is mass movement slide?
- 7 What happened in the La Conchita landslide 2005?
- 8 What year did the landslide happen in Ventura CA?
What type of slide is the La Conchita slide?
In La Conchita, there was a landslide and earthflow in the spring of 1995 (see figure 1). People were evacuated and the houses nearest the slide were completely destroyed. This is a typical type of landslide. Figure 2.
What was the type of landslide in recent 2005 La Conchita landslide?
The 1995 landslide was a deep, coherent slump—earth flow that deformed plastically and moved slowly enough that people could get out of its way. The 2005 landslide was a shallower remobilization of the very same material into a rapid, highly fluid debris flow that buried 10 people.
When was the last landslide in La Conchita?
January 10, 2005
On January 10, 2005, a major landslide occurred in La Conchita. The 2005 landslide killed 10 people, and destroyed or damaged dozens of houses. The landslide recurred on part of a previous landslide in 1995….La Conchita, California.
| La Conchita | |
|---|---|
| Country | United States |
| State | California |
| County | Ventura |
| Population (2000) |
What happened at La Conchita in 1995 and 2005?
The events of Jan. 10, 2005, when 400,000 tons of mud slid down the bluff behind La Conchita, killing seven adults and three children, are frozen in the eerie tableau — a reminder of the hidden dangers lurking beneath the surface. The tragedy came 10 years after the hill collapsed in 1995 when nine homes were lost.
What was the main cause of La Conchita landslide in 2005?
The landslide occurred after a 15-day period of unprecedented records of rainfall in Southern California. It is likely that the new rainfall did not enter the deposits left behind after the 1995 landslide, but slid off it taking surface debris and few new materials with it.
What are the types of mass movement?
There are four different types of mass movement:
- Rockfall. Bits of rock fall off the cliff face, usually due to freeze-thaw weathering.
- Mudflow. Saturated soil (soil filled with water) flows down a slope.
- Landslide. Large blocks of rock slide downhill.
- Rotational slip. Saturated soil slumps down a curved surface.
What type of mass wasting took place in La Conchita?
The landslide, which occurred about 130 km northwest of Los Angeles, California, mobilized over 40,000 cubic yards of wet debris into a large scale debris flow (commonly referred to in the media as a mudslide) that flowed into a residential community at the foot of the slope, killing 10 persons and damaging or …
What kind of mitigation was done after the La Conchita landslide?
After the 1995 landslide, the town of La Conchita built a retaining wall at the foot of the hill. This is the only mitigation effort the town undertook.
What was different about the 2005 slide at La Conchita compared to the 1995 slide in the same place?
On January 10, 2005, the southeastern portion of the 1995 landslide deposit failed, resulting in shallow, rapid fluid flow, unlike the 1995 landslide. The volume of the landslide was estimated to be approximately 200,000 cubic meters with a surface 350 meters (1,150 feet) long and 80–100 meters (260–330 ft) wide.
What type of mass movement is slide?
c) Slides: A slide is the downslope movement of a soil or rock mass occurring dominantly on the surface of rupture or relatively thin zones of intense shear strain.
What is mass movement slide?
Types of mass movement Flows are a mixture of water, rock and sediment. They move very quickly. A slide happens when a section of soil or rock suddenly gives way and moves down a slope. The material moves as a single mass along a slippery zone. The slippery zone is often made up of wet sediment.
What mitigation took place after the La Conchita slide?
What happened in the La Conchita landslide 2005?
On January 10, 2005, a landslide struck the community of La Conchita in Ventura County, California, destroying or seriously damaging 36 houses and killing 10 people. This was not the first destructive landslide to damage this community, nor is it likely to be the last.
What caused the Los Angeles landslide in 1995?
The landslide occurred after a 15-day period of unprecedented records of rainfall in Southern California. It is likely that the new rainfall did not enter the deposits left behind after the 1995 landslide, but slid off it taking surface debris and few new materials with it.
What year did the landslide happen in Ventura CA?
In 2005, an additional landslide occurred at the end of a 15–day period of near-record rainfall levels. From December 27, 2004, through January 10, 2005, the nearby city of Ventura received 378 millimeters (14.9 inches) of rainfall, only slightly less than its mean annual total of 390 millimeters (15.4 inches).
How many people died in the landslide on Rincon Mountain?
The landslide killed 10 people, and destroyed or damaged dozens of houses. The landslide occurred on part of a previous landslide that occurred in 1995. The historic slides are part of the larger Rincon Mountain slide, which “started many thousands of years ago and will continue generating slides in the future.”