Landslides Commonly Occur When Hurricanes Hit Steep Terrain. Why?

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Landslides Commonly Occur When Hurricanes Hit Steep Terrain. Why??

Landslides commonly occur when hurricanes hit steep terrain. Why? Heavy rain from the tropical system can saturate slopes triggering mass wasting events like mudslides. … Most of the forests have been cut down for charcoal leaving barren slopes subject to mass wasting during heavy tropical rainstorms and earthquakes.

Which of the following mass movements is most likely to occur in a geologic setting where the rock strata are inclined?

Geology100
Question Answer
Which of the following mass movements is most likely to occur in a geologic setting where the rock strata are inclined? rockslide
Which of the following statements concerning mudflows is NOT true? Mudflows deposit talus slopes

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How do the strength and cohesion of clay rich regolith or soil change with the addition of water?

How do the strength and the cohesion of clay-rich regolith or soil change with the addition of water? Water reduces the strength and the cohesion. How do freezing thawing wetting and drying contribute to soil creep? The soil expands and contracts lifting particles and dropping them a slight distance downslope.

What is the major distinction between internal and external earth processes what is the major distinction between internal and external earth processes?

What is the major distinction between internal and external Earth processes? Internal processes are driven by things like Plate Tectonics and external processes are driven by the sun.

How does deforestation by fire or human activities contribute to mass wasting?

How does deforestation by fire or human activity contribute to mass wasting? It kills tree roots that help hold the slopes in place allowing mass movement.

Why would landslides be less likely to occur in areas that receive only moderate amounts of rainfall?

Why would landslides be LESS likely to occur in areas that receive only moderate amounts of rainfall? Small amounts of rain increase weathering. Small amounts of rain increase vegetation.

Which of the following is the major contributing factor in a landslide?

Landslides can be initiated in slopes already on the verge of movement by rainfall snowmelt changes in water level stream erosion changes in ground water earthquakes volcanic activity disturbance by human activities or any combination of these factors.

What can happen to the downhill toe of a slump?

What can happen to the downhill toe of a slump during wet weather or times when snow is melting? The toe can become an earthflow.

Which form of mass wasting occurs exclusively in permafrost regions?

ho) Sollfluction is an important mass wasting process in areas of permafrost.

Which process of mass wasting occurs primarily in permafrost regions?

Solifluction is an important mass wasting process is areas of permafrost.

Why is the Earth active with internal dynamics while the moon Mercury or Mars are geologically dead?

The Earth’s internal heat. The internal heat stored in the Earth is responsible for our planet being geologically active. … This internal heat generates convection currents in the mantle which behaves like an extremely thick liquid. When the materials in the interior heat up they expand become less dense and rise.

What is the main reason of the internal processes that take place on Earth?

Internal processes occur due to the internal heat of the Earth’s interior. The movement in the lithospheric plate is the biggest example of internal processes. Volcanoes earthquakes are all example of internal process caused by the disturbance in the earth’s layer.

Why are weathering mass wasting and erosion considered external processes?

Rocks spontaneously change into sediment and soil after erosion and exfoliation. 4. Why are weathering mass wasting and erosion considered “external processes”? … These processes involve the interaction of rocks and the Earth’s internal processes.

Which region would be most likely to produce a catastrophic landslide?

Landslides are associated with hilly or mountainous landscapes. They are also common along coastlines and river valleys. Landslides occur most frequently in regions where climate and precipitation bedrock and soil conditions and slopes are susceptible to failure.

Why do small sediments weather faster than larger sediments?

When a large rock is broken into smaller blocks the total volume of the rocks is the same. There is now more surface area though. Weathering happens over a greater surface area. The smaller rock weathers faster than if it was one large chunk.

Which mineral is most resistant to chemical weathering quizlet?

Most sandstone is composed of quartz or feldspar because they are the most resistant minerals to weathering processes at the Earth’s surface as seen in Bowen’s reaction series.

Why do so many landslides occur near mountains rather than in flat areas?

Why do so many landslides occur near mountains rather than in flat areas? … The trees on the mountains tend to push down the dirt. Mountains are big hills which allow the dirt to slide down them quickly.

Where do landslides occur most often?

The primary regions of landslide occurrence and potential are the coastal and mountainous areas of California Oregon and Washington the States comprising the intermountain west and the mountainous and hilly regions of the Eastern United States. Alaska and Hawaii also experience all types of landslides.

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In which state landslides are most likely?

Slides can occur in all 50 states but regions like the Appalachian Mountains the Rocky Mountains and the Pacific Coastal Ranges have “severe landslide problems ” according to the USGS. The agency lists California Oregon Washington Alaska and Hawaii as especially prone.

Why do landslides occur?

Landslides are caused by disturbances in the natural stability of a slope. They can accompany heavy rains or follow droughts earthquakes or volcanic eruptions. Mudslides develop when water rapidly accumulates in the ground and results in a surge of water-saturated rock earth and debris.

What are the common causes of landslide in the Philippines?

Physical causes
  • Intense rainfall.
  • Rapid snow melt.
  • Prolonged precipitation.
  • Rapid drawdown.
  • Earthquake.
  • Volcanic eruption.
  • Thawing.
  • Freeze-thaw.

What makes road construction a possible cause of a landslide?

Making a road cut increases the dip angle of the slope hence the constructed road cut has a steeper angle than the natural slope angle. … This may cause landslides affecting the road during worst conditions. During rainfall water may run over the natural slope road cuts and also over the road.

How did the underlying geology contribute to the Gros Ventre landslide of 1925?

How did the underlying geology contribute to the Gros Ventre Landslide of 1925? Rains saturated the sandstone and clay that make up the slope. … the gradual movement of wet soil or other material down a slope especially where frozen subsoil acts as a barrier to the percolation of water.

What is slump landslide?

The word slump is most commonly used as a colloquial description of a landslide with a markedly curved and concave-upward slip surface which results in rotational movement of the mass above the slip surface.

Which natural phenomenon can trigger a landslide?

Which natural phenomenon can trigger a landslide? intense rain or an earthquake.

What type of mass wasting occurs when permafrost melts and is pulled downward due to gravity?

solifluction flowage of water-saturated soil down a steep slope. Because permafrost is impermeable to water soil overlying it may become oversaturated and slide downslope under the pull of gravity.

Which type of mass wasting is common in rocky material and moves fast?

Landslides
Landslides and avalanches can move as fast as 200 to 300 km/hour. Figure 3. (a) Landslides are called rock slides by geologists.

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Which type of mass wasting is common in rocky material and moves fast quizlet?

SLUMPS are movement of a mass of rock or unconsolidated material as a unit along a curved surface. Occurs along oversteepened slopes. ROCK SLIDES are blocks of bedrock slide down a slope. Generally very fast and destructive!

Which of the following mass movements is most likely to occur in a geologic setting where the rock strata are inclined?

Geology100
Question Answer
Which of the following mass movements is most likely to occur in a geologic setting where the rock strata are inclined? rockslide
Which of the following statements concerning mudflows is NOT true? Mudflows deposit talus slopes

What differentiates a debris flow from a landslide?

Debris flow is a distinct type of mass movement commonly triggered by intense rainfall and/or melting snow on steep hill slopes. It differs from landslide in its “flowing” feature. Flow means relative movement in numerous layers of the medium whereas a slide occurs only along one or several interfaces or beds.

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