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This type of grading is relatively uncommon but is characteristic of sediments deposited by grain flow and debris flow. [2] A favored explanation for reverse grading in these processes is kinetic sieving. [3] It is also observed in aeolian processes, such as in pyroclastic fall deposits. [4] These deposition processes are examples of granular ...
An atheroma, or atheromatous plaque, is an abnormal accumulation of material in the inner layer of an arterial wall. [1] [2]The material consists of mostly macrophage cells, [3] [4] or debris, containing lipids, calcium and a variable amount of fibrous connective tissue.
Debris flow channel with deposits left after 2010 storms in Ladakh, NW Indian Himalaya. Coarse bouldery levees form the channel sides. Poorly sorted rocks lie on the channel floor. Debris flow in Saint-Julien-Mont-Denis, France, July 2013 Scars formed by debris flow in Ventura, greater Los Angeles during the winter of 1983. The photograph was ...
Direct and indirect methods are two ways in which bed material can be measured. Direct measurement is done through the use of a physical trap, placing the device in contact with the bed, “allowing the sediment transported as bedload to accumulate (or be trapped) inside the sampler for a certain amount of time, after which the sampler is raised to the surface and the material is emptied and ...
Description: "Debris flow is a very rapid to extremely rapid flow of saturated non-plastic debris in a steep channel" (Hungr et al.,2001) Speed: very rapid to extremely rapid (>5 m/s) Type of slope: angle 20–45 degrees. Control factor: torrent sediments, water flows. Causes: High intensity rainfall
Rockslide at Oddicombe Beach in Devon, UK Rockslides in Nigeria Landslips. A rockslide is a type of landslide caused by rock failure in which part of the bedding plane of failure passes through compacted rock and material collapses en masse and not in individual blocks.
Stratified slope deposits or grèzes litées (original French name) are accumulations of debris that are traditionally associated with periglaciation but that can also form in other settings. [1] [2] The deposits have a weak sorting and a coarse bedding. Stratified slope deposits are usually found at the lower slopes of valleys where ...
Debris flow deposits are characterized by a bimodal distribution of grain sizes, in which larger grains and/or clasts float within a matrix of fine-grained clay. Because the muddy matrix has cohesive strength, unusually large clasts may be able to float on top of the muddy material making up the flow matrix, and thereby end up preserved on the ...