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Geohazard
A geologic hazard or geohazard is an adverse geology, geologic condition capable of causing widespread damage or loss of property and life. These hazards are geological and environmental conditions and involve long-term or short-term geological processes. Geohazards can be relatively small features, but they can also attain huge dimensions (e.g., submarine or surface landslide) and affect local and regional socio-economics to a large extent (e.g., tsunamis). Sometimes the hazard is instigated by the careless location of developments or construction in which the conditions were not taken into account. Human activities, such as drilling through overpressured zones, could result in significant risk, and as such mitigation and prevention are paramount, through improved understanding of geohazards, their preconditions, causes and implications. In other cases, particularly in montane regions, natural processes can cause catalytic events of a complex nature, such as an avalanche hitting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |
Cambering (geology)
Cambering is a phenomenon typically seen at a valley crest or plateau margin whereby blocks of competent strata such as sandstone stretch, tilt or rotate with respect to underlying incompetent rock layers such as clay or mudstone. It results from the weaker underlying strata deforming under the weight of the strata above it. Cambering is associated with valley bulging and the development of gulls on the upper slopes. Valley bulging is the development of an anticlinal structure in the underlying weaker strata, the long axis of which is broadly coincident with the orientation of the valley. Valley bulging was first described in England within the upper Derwent catchment in Derbyshire and is also encountered within the Cotswolds. Gulls are fractures in competent strata that typically form parallel to a valley side in association with cambering. They occur on a range of scales with widths from millimetres to tens of metres. The gulls may be voids open to the sky or they may be part ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] [Amazon] |