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Series: Geological Society, London, Special Publications
Published: 01 January 2016
DOI: 10.1144/SP431.9
EISBN: 9781862399631
...: that is, low equilibrium temperatures, and high values for stress exponent and creep activation energy. However, 4 Ma after break-up (i.e. at 104 Ma), lower crustal viscosities of less than 10 18 Pa s occur at two different locations in the model domain. One of the low-viscosity zones originates at COB 1...
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Published: 01 January 2009
DOI: 10.1130/2009.monitoring(01)
EISBN: 9780813759432
... by a combination of direct wind shear stress and atmospheric turbulence. There are three modes of sediment transport by wind: creep or reptation; saltation, and suspension ( Fig. 1 ). The mode of transport depends primarily on the ratio between particle settling velocity, and hence particle size, and wind...
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Published: 01 January 2009
DOI: 10.1130/2009.monitoring(11)
EISBN: 9780813759432
... Abstract Slope movements, including types of landslides and extremely slow soil creep ( Varnes, 1978 ), occur throughout the United States and within many national parks. The collection of vital signs of regional landslide information, referred to as monitoring, is not only...
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Series: GSA Special Papers
Published: 01 January 2006
DOI: 10.1130/2006.2408(03)
... Abstract This field trip is along the central section of the San Andreas fault and consists of eight stops that illustrate surface evidence of faulting, in general, and features associated with active fault creep, in particular. Fault creep is slippage along a fault...
... of the UC-Berkeley main campus (Fig. 1 ). Stops are designed to illustrate geomorphic features of the fault, the effects of fault creep on structures sited on the fault, and retrofit design of structures to mitigate potential future deformation due to fault rupture. The UC-Berkeley campus...
... motion between the Pacific and North American tectonic plates. Slip is released in large, episodic earthquakes and, on some faults, such as the northern Maacama fault, by slow, steady creep. Figure 1. Regional setting of field trip (A) and location of trip stops for Day 1, with route highlighted...
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Series: GSA Reviews in Engineering Geology
Published: 01 January 1992
DOI: 10.1130/REG9-p55
EISBN: 9780813758091
... through the creep-prone soil to derive support in bedrock. The consultant observed that, prior to sliding, the site was affected by minor slumping in the road cut along Callon Drive. By December 1977, the owner noticed the effects of instability. Movement worsened to the point of general failure...
Series: GSA Reviews in Engineering Geology
Published: 01 January 1992
DOI: 10.1130/REG9-p63
EISBN: 9780813758091
... movement (i.e., sagging, creep) following the heavy rains of 1978. Manifested mostly by cracks within paved terrace drains and/or downdrains, the movement appears to be related to local perched ground water and a northwest-southeast-trending fault zone that cuts across the southern part of the slope...
Series: Reviews in Engineering Geology
Published: 01 January 1977
DOI: 10.1130/REG3-p113
EISBN: 9780813758039
... Abstract A variety of mass-movement processes interact to form complex mass-movement terrains in the western Cascade Range in Oregon. Slow, deep-seated (>5 m depth) processes of creep, slump, and earthflow operate simultaneously and sequentially, resulting in unstable conditions that may...
Series: GSA Engineering Geology Case Histories
Published: 01 January 1968
DOI: 10.1130/Eng-Case-6.65
EISBN: 9780813759319