How was Whidbey Island formed?
As the Ice Age advanced, glaciers came south, the seas and the land shifted to inundate much of Whidbey. Eventually, the ice capped the island thousands of feet high, cut off the Puget Sound from the sea, turning into an enormous fresh water lake. There wasn’t just one glacier.
What causes landslide in Washington?
Landslides exist throughout Washington State and can be triggered in many ways. Rainfall—Prolonged or intense rainfall and rain-on-snow events can saturate soils and trigger landslides. Earthquakes—Intense shaking during earthquakes can cause the ground to fail.
What type of landslide was the Oso landslide?
The landslide involved a complex sequence of events—including rotation, translation, and flow mechanisms—and can be referred to as a debris-avalanche flow.
How is a landslide defined?
A landslide is defined as the movement of a mass of rock, debris, or earth down a slope. Earthquake shaking and other factors can also induce landslides underwater. These landslides are called submarine landslides. Submarine landslides sometimes cause tsunamis that damage coastal areas.
What is Whidbey Island known for?
As an island, Whidbey is known for its excellent seafood. The standout, though, are mussels farmed from Penn Cove, near Coupeville. It’s not unusual on Whidbey to ask someone “where are these mussels from?” and literally have them point down the road.
What climate zone is Whidbey Island?
Whidbey Island Station, Washington is in USDA Hardiness Zones 8b.
What caused 2014 Oso landslide?
A major landslide occurred 4 miles (6.4 km) east of Oso, Washington, United States, on March 22, 2014, at 10:37 a.m. local time….2014 Oso mudslide.
|Oso mudslide on March 29, 2014, view to the northeast|
|Date||March 22, 2014|
|Cause||Suspected soil saturation from heavy rainfall|
Are landslides common in Washington?
Landslides are common in Washington state, with many occurring annually in the Puget Sound area, especially along the Sound’s steep shoreline bluffs. Landslide areas are deemed geologically-hazardous, environmentally-critical areas under the state Growth Management Act.
Why was the Oso landslide an unusual landslide?
The Hazel Landslide has a history of instability dating to 1937. Prior to the March 2014 mudslide, the Oso area had heavy rainfall during the previous 45 days, up to 200 percent of normal. A national geologist stated the flow of the landslide was extreme because of the extraordinary run-out of mud and debris.
What was the worst landslide in history?
Deadliest Landslides In Recorded History
- Huaraz Debris Flows, Ancash, Peru, December 1941 (5,000 deaths)
- 62 Nevado Huascaran Debris Fall, Ranrahirca, Peru, January 1962 (4,500 deaths)
- Khait Landslide, Tajikstan, July 1949 (4,000 deaths))
- Diexi Slides, Sichuan, China, August 1933 (3,000+ deaths)
What is landslide essay?
A landslide is the movement of rock and soil down a slope. Landslides range in size from a single boulder in a rock fall to a debris avalanche, which may have huge volumes of rock and soil capable of covering many kilometers. Heavy rain, floods, or earthquake shaking can cause landslides.
What are the different types of landslide describe each?
Landslides are part of a more general erosion or surficial pro- cess known as mass wasting, which is simply the downslope movement of earth or surface materials due to gravity. They are classified into four main types: fall and toppling, slides (rotational and translational), flows and creep.