Search results
Results from the WOW.Com Content Network
Debris flows tend to move in a series of pulses, or discrete surges, wherein each pulse or surge has a distinctive head, body and tail. A debris flow in Ladakh, triggered by storms in 2010. It has poor sorting and levees. Steep source catchment is visible in background. Debris-flow deposits are readily recognizable in the field.
The side displaying the bulb of force but without flake scars (barring an errailure flake scar or additional working of the flake) is called the ventral (or interior) surface, while the opposite side, displaying the flake scars of previous removals, or the cortical or original rock surface, is the dorsal (or exterior) surface.
Thousands of rocks that bear a strong resemblance to prehistoric tools have been found at the site, both on the surface, and up to 8 m (26 ft) below the surface. A stone from the Master Pit had been dated to over 200,000 BP. This date could have been the result of contamination from other elements in the soil, so currently there is an effort to ...
Today the bottom of Spirit Lake is 100 ft (30 m) above the original surface, and it has two and a half times more surface area than it did before the eruption. The largest known of all prehistoric landslides was an enormous submarine landslide that disintegrated 60,000 years ago and produced the longest flow of sand and mud yet documented on ...
Debris from the impact was scattered over an area of 1,600,000 km 2 (620,000 sq mi) thrown more than 800 km (500 mi); and ejecta—rock fragments ejected by the impact—have been found as far away as Minnesota. [5] [6] [7] Models suggest that for such a large impact, debris was most likely scattered globally, [8] but has
Flows cover the range from floods through hyperconcentrated flows to debris flows, depending on the volume of sediments in the flow. Debris flows resemble freshly poured concrete, consisting mostly of coarse debris. Hyperconcentrated flows are intermediate between floods and debris flows, with a water content between 40 and 80 weight percent.
Nuʻuanu Slide is seen near the center top in this bathymetry image of the Hawaiian archipelago, Nuʻuanu Slide or Nuʻuanu Debris Avalanche is the largest of seventeen known submarine landslides around the Hawaiian Islands and at 200 kilometers (124 mi) in length, one of the largest landslides on Earth.
The major volcanoes of the Cascade Range are fed from heat generated as tectonic plates dive below North America.. All rock now exposed in the area of the park is volcanic, and unconformably overlies much older sedimentary, metamorphic and igneous rock, [6] which was formed during the hundreds of millions of years when the Lassen region underwent repeated uplifting to form mountains, only to ...