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He showed (1798) that the whinstones of Edinburgh were fusible and if rapidly cooled yielded black vitreous masses closely resembling natural pitchstones and obsidians. If cooled more slowly they consolidated as crystalline rocks not unlike the whinstones themselves and containing olivine , augite and feldspar (the essential minerals of these ...
Rocks formations and the Dedo de Deus (God's Finger) peak in the background, Serra dos Órgãos National Park, Rio de Janeiro state, Brazil Raouché or Pigeons' Rock in Beirut, Lebanon Druid Arch, Canyonlands National Park, Utah, US View of Meteora, Greece Rock formations in Ongamira Valley, Sierras de Córdoba, Argentina Belogradchik Rocks, Balkan Mountains, Bulgaria "Jaws", an erosional fin ...
A slide is the movement of a body of material that generally remains intact while moving over one or several inclined surfaces or thin layers of material (also called shear zones) in which large deformations are concentrated. Slides are also sub-classified by the form of the surface(s) or shear zone(s) on which movement happens.
Various scientific disciplines have developed taxonomic classification systems to describe natural phenomena or individuals, like for example, plants or animals. These systems are based on specific characteristics like shape of organs or nature of reproduction.
Bridge Mountain's natural arch; Lexington Arch, Great Basin National Park; Little Finland, Gold Butte National Monument; Red Rock Canyon; Valley of Fire State Park. Elephant Rock; Fire Wave (similar to but smaller than The Wave in Arizona) Natural Arch (collapsed in 2010)
Heavy Moisture led to land slides of blocks of overhanging earth. Thus the slumps retained their original layering sequence. A slump is a form of mass wasting that occurs when a coherent mass of loosely consolidated materials or a rock layer moves a short distance down a slope. [1]
Lava tube – Natural conduit through which lava flows beneath the solid surface; Lavaka – Type of gully, formed via groundwater sapping; Levee – Ridge or wall to hold back water, natural; Limestone pavement – Natural karst landform consisting of a flat, incised surface of exposed limestone; Loess – Sediment of accumulated wind-blown dust
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.