Palaeogeographic reconstruction using composite maps, with case studies from three continents

Roux, J.P. Le

doi:10.1016/s0031-0182(96)00152-6

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…For the first time in a cirque morphometric analysis, a composite map methodology (Le Roux and Rust, 1989;Merriam and Jewett, 1989;Le Roux, 1997;Sepúlveda et al, 2013) was used to assist in the cirque characterization. This technique was originally designed for paleogeographic reconstructions and uranium exploration and is based on the combination of different parameters (characteristics of cirques in this case) into single, combined values, which are eventually plotted on a composite map.…”

Section: Methodsmentioning

confidence: 99%

Factors controlling alpine glaciations in the Sierra Baguales Mountain Range of southern Patagonia (50º S), inferred from the morphometric analysis of glacial cirques

Araos

Roux

Kaplan

et al. 2018

andgeo

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The Sierra Baguales Mountain Range, forming the eastern foothills of the Southern Patagonian Andes, has well-developed alpine-glaciated landforms which present an ideal opportunity to study climatic and non-climatic factors that control cirque development and morphology. One hundred and forty-three glacial cirques were studied with reference to 14 morphometric attributes which were analyzed using statistical analysis and GIS methodologies. The cirques were classified into two types using cluster analysis complimented with a composite map based on the attributes, the latter technique that is applied to glacial cirque analysis for the first time. Type 1 cirques are associated with glacial processes isolated from the Southern Patagonian Ice Field (SPIF), developed under locally cold and dry climatic conditions. Type 2 glacial cirques are associated with older, more extensive glacial processes controlled by regional-scale climate variables and the presence of the Pleistocene Ice Sheet. The results show that the development of most of the glacial cirques has been controlled mainly by their aspect, exposure to solar radiation, Southern Hemisphere Westerly winds, and cirque floor slope. Finally, we concluded that our analyses show the evolution of cirques in the Sierra Baguales Mountain Range was not uniform. Cirque glaciers that developed to the west, close to the Southern Patagonian Ice field, have been more dynamic, and therefore their cirques experienced more erosion than those located to the east.

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Section: Methodsmentioning

confidence: 99%

Factors controlling alpine glaciations in the Sierra Baguales Mountain Range of southern Patagonia (50º S), inferred from the morphometric analysis of glacial cirques

Araos

Roux

Kaplan

et al. 2018

andgeo

View full text Add to dashboard Cite

show abstract

Application of the composite maps method for landslide susceptibility assessment and its potential use for other natural risk analyses

2013

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Composite maps have previously been applied to paleogeographic reconstructions and as an aid to mineral exploration. However, because they can combine different criteria that are used in risk and feasibility assessment into a single map with equal or weighted input from all the parameters, decisionmaking can be optimized. The methodology is particularly suitable for the evaluation of landslide hazard and susceptibility assessment, as it can combine the unfavourable factors typically associated with mountainous terrains. Composite maps also have the potential to standardize prediction and prevention criteria for different areas. The methodology is described together with an hypothetical example and a real case study in Patagonia, the results of which are compared with a susceptibility analysis of the same area using stochastic methods.Keywords: Geological hazards; slope failure, landslide susceptibility. RESUMENLos mapas compuestos han sido aplicados previamente en reconstrucciones paleogeográficas y como apoyo a la exploración minera. Sin embargo, dado que pueden combinar en un solo mapa diferentes criterios que usualmente se utilizan en análisis de riesgo y factibilidad, otorgando igual o distinto peso a los distintos parámetros, la toma de decisiones se ve optimizada. La metodología es particularmente aplicable en la evaluación de susceptibilidad y amenaza de remociones en masa, ya que puede combinar factores desfavorables típicamente presentes en terrenos montañosos. Los mapas compuestos tienen el potencial de estandarizar las predicciones y criterios preventivos para distintas áreas. Esta metodología se describe en conjunto con un ejemplo teórico y un estudio de caso real en la Patagonia, cuyos resultados son comparados con análisis de susceptibilidad en la misma zona usando métodos estocásticos.Palabras clave: Amenaza Geológica; falla en las laderas; susceptibilidad a deslizamientos de tierra.Recibido el 22 de julio de 2013, aceptado el 2 de diciembre de 2013.

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Palaeogeographic reconstruction using composite maps, with case studies from three continents

Cited by 2 publications

References 13 publications

Factors controlling alpine glaciations in the Sierra Baguales Mountain Range of southern Patagonia (50º S), inferred from the morphometric analysis of glacial cirques

Factors controlling alpine glaciations in the Sierra Baguales Mountain Range of southern Patagonia (50º S), inferred from the morphometric analysis of glacial cirques

Application of the composite maps method for landslide susceptibility assessment and its potential use for other natural risk analyses

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