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Debris flow channel scoured out by the passage of a debris flow. A flow is a spatially continuous movement in which surfaces of shear are short-lived, closely spaced, and usually not preserved. The distribution of velocities in the displacing mass resembles that in a viscous liquid.
In Japan a large debris flow or landslide is called yamatsunami , literally mountain tsunami. Ancient debris flow deposit at Resting Springs Pass, California. Debris flows are accelerated downhill by gravity and tend to follow steep mountain channels that debouche onto alluvial fans or floodplains.
Landslides, also known as landslips, skyfalls or rockslides, [3] [4] [5] are several forms of mass wasting that may include a wide range of ground movements, such as rockfalls, mudflows, shallow or deep-seated slope failures and debris flows. [6] Landslides occur in a variety of environments, characterized by either steep or gentle slope ...
These conditions triggered a debris flow, resulting in an accumulation stretching about 1.2km (0.7 miles) in length, with a total volume exceeding 100,000 cubic meters (3.5 million cubic feet).
A landslide, also called a landslip, [10] is a relatively rapid movement of a large mass of earth and rocks down a hill or a mountainside. Landslides can be further classified by the importance of water in the mass wasting process. In a narrow sense, landslides are rapid movement of large amounts of relatively dry debris down moderate to steep ...
These "purple zones" show areas where landslides, known in geology as "debris flows," are likely to start. The zones make up 13.3% of the mountainous counties in western North Carolina, which adds ...
Loess flows and landslides over an area of 50,000 km 2 (19,000 sq mi). Failures in loess caused extreme fissuring, landslide dams, and buried villages. [70] 1920 Veracruz, Mexico: 1920 Xalapa earthquake: est. 600–870 Debris flows destroyed village of Barranca Grande, and were 40 to 65 m (131 to 213 ft) deep. Debris flows extended >40 km (25 mi).
A massive debris flow has closed the Valley of the Giants, a popular hike through some of Oregon’s oldest and largest trees in the Coast Range. ... The area was closed by a recent landslide ...