Weathering of Granite and Associated Erosional Features in Hong Kong

Ruxton, Bryan P.; Berry, Leonard L.

doi:10.1130/0016-7606(1957)68[1263:wogaae]2.0.co;2

Cited by 268 publications

(87 citation statements)

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“…Soil is relatively weak and prone to dispersion and internal erosion. Ruxton and Berry (1957) present a graphic example from Hong Kong. They describe how a tomb cut within saprolite and lined with loose brick walls was discovered at Li Cheng Uk.…”

Section: Preferential Flow Paths Through Soilmentioning

confidence: 99%

Preferential flow paths through soil and rock and their association with landslides

Hencher

2010

Hydrological Processes

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Abstract:This article discusses preferential flow paths through soil and rock and how these contribute to the style and timing of landslides. The importance of geological compartmentalization because of the presence of aquicludes such as weathered dykes and faults is emphasized as is channel flow through fracture networks and through natural pipes in soil-like material. Although piping is a contributing factor to some landslides, as generally recognized, it can also be a sign of inherent distress in a developing landslide where water flow exploits cracks in the dilating rock mass. It is suggested that the association might be targeted in ground investigation. Inactive or low activity pipe systems can be identified by the anomalous presence of alluvial sediments at depth in the geological profile, whereas active pipe systems may simply comprise voids that could be misinterpreted as core loss during ground investigation. Examples of pipe systems encountered during ground investigations are given for various landslides and several case studies are illustrated in this article. Mitigation measures for preventing landslides triggered by rainfall are discussed together with the difficulties associated with preferential flow paths.

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Section: Preferential Flow Paths Through Soilmentioning

confidence: 99%

Preferential flow paths through soil and rock and their association with landslides

Hencher

2010

Hydrological Processes

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“…In a typical regolith profile, different zones of weathering can be distinguished (e.g., Ruxton and Berry 1957;Birkeland 1984;Boulangé et al 1997). The investigated regolith can be regarded as a saprock, the lowermost part in the regolith profile overlying the bedrock (in this case the rocks of the Sesia-Lanzo Zone).…”

Section: Carbonatementioning

confidence: 99%

The composition and evolution of an Oligocene regolith on top of the Sesia–Lanzo Zone (Western Alps)

Kapferer

Mercolli

Berger

2011

Int J Earth Sci (Geol Rundsch)

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An Oligocene paleosurface (regolith) lies on top of the high-pressure metamorphic rocks of the SesiaLanzo Zone near Biella, NW Italy. Only the saprock, the lowermost part in a regolith profile, is preserved. No evidence for any paleosoil can be observed. Field observations indicate that the regolith developed through in situ mechanical fracturing of the rocks of the Sesia-Lanzo Zone in a continental environment. Density estimations of the regolith and the underlying rocks of the Sesia-Lanzo Zone confirm the field observations and imply that a relatively small amount of alteration minerals was formed. The main detected alteration phases are chlorite, various carbonates, quartz, clay minerals, Fe-oxides, and Fe-hydroxides. Chlorite differing in chemistry and crystallographic ordering demonstrates different stages of alteration. Oxygen and carbon isotopic composition of carbonates suggests temperatures higher than surface conditions. Illite and chlorite thermometry indicates temperatures related to the anchizone (*250-300°C). These data are considered as a robust indication of the re-burial of the regolith together with its substrate and its volcanic cover. The burial is closely related to the tilting of the preserved stratigraphic sequence formed by the rocks of the Sesia-Lanzo Zone, the regolith, and the rocks of the Biella Volcanic Suite (Lanza, in Schweiz Miner Petrogr MItt 57: 281-290, 1977; Lanza, in Geologishe Rundschau 68: 83-92, 1979). Furthermore, the burial is consistent with this sequence of subaerial rocks being very close to the intrusion depth of the Valle del Cervo Pluton at the time of its emplacement (4-7 km;

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“…A summary relationship is discussed, related to the weathering classification scheme by Ruxton & Berry (1957) and the Geological Society Engineering Group Working Party (1990). As described by Migoń , the style of slope failures varies depending on the local relief and the grade of weathering (Fig.…”

mentioning

confidence: 99%

Weathering as a predisposing factor to slope movements: an introduction

Calcaterra¹,

Parise

2010

EGSP

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Recognition of weathering as a primary process in the development of landforms dates back at least to the late 19th and early 20th century, as indicated by several contributions from various countries (e.g. Cortese 1895;Branner 1896;Falconer 1911;Jutson 1914;Walther 1915); nevertheless, it was only in the second half of the last century that systematic studies on weathering and related topics such as geomorphology, engineering geology and petrography were carried out. In a recent review paper Ehlen (2005) found through an on-line search more than 9000 hits where the term 'weathering' was used, dating from the mid-1950s to the beginning of the 21st century. Such a huge number of citations clearly demonstrates the attention that the scientific community has dedicated to the in-place breakdown of rocks by chemical, physical and biological processes. However, despite the high frequency of landslides and erosional phenomena in weathered materials, and the damage and casualties they repeatedly cause, not very much is known about the direct and indirect relationships between weathering and slope

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Weathering of Granite and Associated Erosional Features in Hong Kong

Cited by 268 publications

References 0 publications

Preferential flow paths through soil and rock and their association with landslides

Preferential flow paths through soil and rock and their association with landslides

The composition and evolution of an Oligocene regolith on top of the Sesia–Lanzo Zone (Western Alps)

Weathering as a predisposing factor to slope movements: an introduction

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