The Experts below are selected from a list of 63909 Experts worldwide ranked by ideXlab platform
Dov Corenblit - One of the best experts on this subject based on the ideXlab platform.
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The search for a signature of life on Mars: a biogeomorphological approach
Astrobiology, 2019Co-Authors: Dov Corenblit, Frédéric Julien, José Darrozes, Thierry Otto, Erwan Roussel, J. Steiger, Heather VilesAbstract:Geological evidence shows that life on Earth evolved in line with major concomitant changes in Earth surface processes and Landforms. Biogeomorphological characteristics, especially those involving microorganisms, are potentially important facets of biosignatures on Mars and are generating increasing interest in Astrobiology. Using Earth as an analog provides reasons to suspect that past or present life on Mars could have resulted in recognizable biogenic Landforms. Here, we discuss the potential and limitations of a biogeomorphological approach in identifying the subsets of Landforms modulated or created through biological processes, and thus presenting signatures of life on Mars. Subsets especially involving microorganisms that are potentially important facets of biosignatures on Mars are proposed: (i) weathering figures, biocrusts, patinas and varnishes; (ii) microbialites and microbially induced sedimentary structures (MISS); (iii) bioaccumulations of skeletal remains; (iv) degassing Landforms; (v) cryoconites; (vi) self-organized patterns; (vii) unclassified non-analog Landforms. We propose a biogeomorphological frequency histogram approach to identify anomalies/modulations in Landform properties. Such detection of anomalies/modulations will help to track a biotic origin and lead to the development of an integrative multi-proxy and multi-scale approach combining morphological, structural, textural and geochemical expertise. This perspective can help to guide the choice of investigation sites for future missions and the types and scales of observations to be made by orbiters and rovers.
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The emergence of an ‘evolutionary geomorphology’?
Central European Journal of Geosciences, 2012Co-Authors: Johannes Steiger, Dov CorenblitAbstract:Earth surface processes and Landforms are modified through the actions of many microorganisms, plants and animals. As organism-driven Landform modifications are sometimes to the advantage of the organism, some of these Landform features have become adaptive functional components of ecosystems, concurrently affecting and responding to ecological and evolutionary processes. These recent eco-evolutionary insights, focused on feedback among geomorphologic, ecological and evolutionary processes, are currently leading to the emergence of what has been called an ‘evolutionary geomorphology’, with explicit consideration of feedbacks among the evolution of organisms, ecosystem structure and function and Landform organization at the Earth surface. Here we provide an overview in the form of a commentary of this emerging sub-discipline in geosciences and ask whether the use of the term ‘evolutionary geomorphology’ is appropriate or rather misleading.
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Changing river channels: the roles of hydrological processes, plants and pioneer fluvial Landforms in humid temperate, mixed load, gravel bed rivers.
Earth-Science Reviews, 2012Co-Authors: Angela M Gurnell, Walter Bertoldi, Dov CorenblitAbstract:The fluvial riparian and aquatic patch mosaic varies along rivers according to geomorphological setting, hydrological regime, sediment supply and surface–groundwater connectivity. This relation between physical processes and plants is not unidirectional. Once established, riparian and aquatic plants frequently act as physical ecosystem engineers by trapping and stabilising sediments, organic matter and the propagules of other plant species, modifying the local sedimentary and morphological environment by driving the development of Landforms and associated habitats, and so facilitating the rapid establishment of other plants that can in turn reinforce the development of Landforms such as river banks, vegetated islands and floodplains. This paper reviews knowledge on the hydrogeomorphological significance of riparian and aquatic vegetation with a particular emphasis on humid temperate, mixed load, gravel bed, floodplain rivers. First, we investigate how vegetation dynamics across river margins are governed by hydrological processes that can both promote riparian vegetation growth and disturb and destroy riparian and aquatic vegetation. We show, with some simple numerical modeling, that different combinations of moisture supply and flow disturbance have the potential to generate many different responses in the lateral distribution of vegetation biomass along river corridors. Second, building on the varied lateral biomass distributions that are primarily dictated by hydrological processes, we review research evaluating characteristic vegetation-mediated Landform development. We investigate aquatic and riparian plants acting as physical ecosystem engineers by creating and modifying habitats in river systems with sufficient suspended sediment supply for habitat or Landform building. These plants have a crucial impact on sediment stabilisation and pioneer Landform building along the interface between plant (resistance) dominated and fluvial-disturbance (force) dominated zones of the river corridor. We present some examples of vegetation-mediated Landforms along rivers with strongly contrasting hydrological regimes and thus lateral distributions of vegetation. Lastly, we present a conceptual synthetic model that links the development of pioneer Landforms by engineering plants with river morphology and morphodynamics in humid temperate, mixed load, gravel bed, floodplain rivers. Drawing on four example rivers, we show how different plants and pioneer Landforms act at the interface between the plant dominated and fluvial-disturbance dominated zones of the river corridor as river energy and vegetation colonisation and growth change.
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The emergence of an 'evolutionary geomorphology'?
Central European Journal of Geosciences, 2012Co-Authors: Johannes Steiger, Dov CorenblitAbstract:Earth surface processes and Landforms are modified through the actions of many microorganisms, plants and animals. As organism-driven Landform modifications are sometimes to the advantage of the organism, some of these Landform features have become adaptive functional components of ecosystems, concurrently affecting and responding to ecological and evolutionary processes. These recent eco-evolutionary insights, focused on feedback among geomorphologic, ecological and evolutionary processes, are currently leading to the emergence of what has been called an ‘evolutionary geomorphology’, with explicit consideration of feedbacks among the evolution of organisms, ecosystem structure and function and Landform organization at the Earth surface. Here we provide an overview in the form of a commentary of this emerging sub-discipline in geosciences and ask whether the use of the term ‘evolutionary geomorphology’ is appropriate or rather misleading.
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feedbacks between geomorphology and biota controlling earth surface processes and Landforms a review of foundation concepts and current understandings
Earth-Science Reviews, 2011Co-Authors: Frédéric Julien, Sebastien Delmotte, J Darrozes, Andreas C W Baas, Robert A. Francis, Gudrun Bornette, Angela M Gurnell, Dov Corenblit, Robert J NaimanAbstract:Abstract This review article presents recent advances in the field of biogeomorphology related to the reciprocal coupling between Earth surface processes and Landforms, and ecological and evolutionary processes. The aim is to present to the Earth Science community ecological and evolutionary concepts and associated recent conceptual developments for linking geomorphology and biota. The novelty of the proposed perspective is that (1) in the presence of geomorphologic-engineer species, which modify sediment and Landform dynamics, natural selection operating at the scale of organisms may have consequences for the physical components of ecosystems, and particularly Earth surface processes and Landforms; and (2) in return, these modifications of geomorphologic processes and Landforms often feed back to the ecological characteristics of the ecosystem (structure and function) and thus to biological characteristics of engineer species and/or other species (adaptation and speciation). The main foundation concepts from ecology and evolutionary biology which have led only recently to an improved conception of Landform dynamics in geomorphology are reviewed and discussed. The biogeomorphologic macroevolutionary insights proposed explicitly integrate geomorphologic niche-dimensions and processes within an ecosystem framework and reflect current theories of eco-evolutionary and ecological processes. Collectively, these lead to the definition of an integrated model describing the overall functioning of biogeomorphologic systems over ecological and evolutionary timescales.
Thomas Baumgartl - One of the best experts on this subject based on the ideXlab platform.
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the application of natural Landform analogy and geology based spoil classification to improve surface stability of elevated spoil Landforms in the bowen basin australia a review
Land Degradation & Development, 2018Co-Authors: Bevan Emmerton, Jon Burgess, J S Esterle, Peter D. Erskine, Thomas BaumgartlAbstract:Large-scale open cut mining has occurred within the Bowen Basin for over 4 decades, transitioning from shallow mining depths and limited spoil elevation to increased mining depths, prestripping and increasingly elevated mesa-like Landforms. As a result of this evolution, the stabilisation of modern constructed Landforms is no longer assured through the establishment of vegetation alone. The selection of resilient fragmental spoil types for the construction of final Landform surfaces, and as cladding for stabilising steep erosive batters, is a practical methodology that has the potential to significantly improve rehabilitation outcomes, by increasing surface rock cover, roughness, and infiltration and reducing erodibility. An understanding of the properties and behaviour of individual spoil materials disturbed during mining is required. Relevant information from published literature on the geological origins, lithology, and weathering characteristics of individual strata within the Bowen Basin Coal Measures (and younger overlying weathered strata) has been reviewed, related to natural Landforms and applied to the surface stability of major strata types when disturbed by mining. A spoil classification derived from geological characteristics and weathering behaviour of identifiable lithologic components has been reviewed and refined, demonstrating the application of use of geological information. This classification system is a tool for the allocation of spoil types and use of categories that have application in premine feasibility investigations, Landform design, and material selection and placement. The logic of classifying materials based on their stability in the natural landscape has wider relevance to other mining areas where elevated Landforms of sedimentary material are constructed.
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The application of natural Landform analogy and geology‐based spoil classification to improve surface stability of elevated spoil Landforms in the Bowen Basin, Australia—A review
Land Degradation & Development, 2018Co-Authors: Bevan Emmerton, Jon Burgess, J S Esterle, Peter D. Erskine, Thomas BaumgartlAbstract:Large-scale open cut mining has occurred within the Bowen Basin for over 4 decades, transitioning from shallow mining depths and limited spoil elevation to increased mining depths, prestripping and increasingly elevated mesa-like Landforms. As a result of this evolution, the stabilisation of modern constructed Landforms is no longer assured through the establishment of vegetation alone. The selection of resilient fragmental spoil types for the construction of final Landform surfaces, and as cladding for stabilising steep erosive batters, is a practical methodology that has the potential to significantly improve rehabilitation outcomes, by increasing surface rock cover, roughness, and infiltration and reducing erodibility. An understanding of the properties and behaviour of individual spoil materials disturbed during mining is required. Relevant information from published literature on the geological origins, lithology, and weathering characteristics of individual strata within the Bowen Basin Coal Measures (and younger overlying weathered strata) has been reviewed, related to natural Landforms and applied to the surface stability of major strata types when disturbed by mining. A spoil classification derived from geological characteristics and weathering behaviour of identifiable lithologic components has been reviewed and refined, demonstrating the application of use of geological information. This classification system is a tool for the allocation of spoil types and use of categories that have application in premine feasibility investigations, Landform design, and material selection and placement. The logic of classifying materials based on their stability in the natural landscape has wider relevance to other mining areas where elevated Landforms of sedimentary material are constructed.
Bevan Emmerton - One of the best experts on this subject based on the ideXlab platform.
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the application of natural Landform analogy and geology based spoil classification to improve surface stability of elevated spoil Landforms in the bowen basin australia a review
Land Degradation & Development, 2018Co-Authors: Bevan Emmerton, Jon Burgess, J S Esterle, Peter D. Erskine, Thomas BaumgartlAbstract:Large-scale open cut mining has occurred within the Bowen Basin for over 4 decades, transitioning from shallow mining depths and limited spoil elevation to increased mining depths, prestripping and increasingly elevated mesa-like Landforms. As a result of this evolution, the stabilisation of modern constructed Landforms is no longer assured through the establishment of vegetation alone. The selection of resilient fragmental spoil types for the construction of final Landform surfaces, and as cladding for stabilising steep erosive batters, is a practical methodology that has the potential to significantly improve rehabilitation outcomes, by increasing surface rock cover, roughness, and infiltration and reducing erodibility. An understanding of the properties and behaviour of individual spoil materials disturbed during mining is required. Relevant information from published literature on the geological origins, lithology, and weathering characteristics of individual strata within the Bowen Basin Coal Measures (and younger overlying weathered strata) has been reviewed, related to natural Landforms and applied to the surface stability of major strata types when disturbed by mining. A spoil classification derived from geological characteristics and weathering behaviour of identifiable lithologic components has been reviewed and refined, demonstrating the application of use of geological information. This classification system is a tool for the allocation of spoil types and use of categories that have application in premine feasibility investigations, Landform design, and material selection and placement. The logic of classifying materials based on their stability in the natural landscape has wider relevance to other mining areas where elevated Landforms of sedimentary material are constructed.
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The application of natural Landform analogy and geology‐based spoil classification to improve surface stability of elevated spoil Landforms in the Bowen Basin, Australia—A review
Land Degradation & Development, 2018Co-Authors: Bevan Emmerton, Jon Burgess, J S Esterle, Peter D. Erskine, Thomas BaumgartlAbstract:Large-scale open cut mining has occurred within the Bowen Basin for over 4 decades, transitioning from shallow mining depths and limited spoil elevation to increased mining depths, prestripping and increasingly elevated mesa-like Landforms. As a result of this evolution, the stabilisation of modern constructed Landforms is no longer assured through the establishment of vegetation alone. The selection of resilient fragmental spoil types for the construction of final Landform surfaces, and as cladding for stabilising steep erosive batters, is a practical methodology that has the potential to significantly improve rehabilitation outcomes, by increasing surface rock cover, roughness, and infiltration and reducing erodibility. An understanding of the properties and behaviour of individual spoil materials disturbed during mining is required. Relevant information from published literature on the geological origins, lithology, and weathering characteristics of individual strata within the Bowen Basin Coal Measures (and younger overlying weathered strata) has been reviewed, related to natural Landforms and applied to the surface stability of major strata types when disturbed by mining. A spoil classification derived from geological characteristics and weathering behaviour of identifiable lithologic components has been reviewed and refined, demonstrating the application of use of geological information. This classification system is a tool for the allocation of spoil types and use of categories that have application in premine feasibility investigations, Landform design, and material selection and placement. The logic of classifying materials based on their stability in the natural landscape has wider relevance to other mining areas where elevated Landforms of sedimentary material are constructed.
J S Esterle - One of the best experts on this subject based on the ideXlab platform.
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the application of natural Landform analogy and geology based spoil classification to improve surface stability of elevated spoil Landforms in the bowen basin australia a review
Land Degradation & Development, 2018Co-Authors: Bevan Emmerton, Jon Burgess, J S Esterle, Peter D. Erskine, Thomas BaumgartlAbstract:Large-scale open cut mining has occurred within the Bowen Basin for over 4 decades, transitioning from shallow mining depths and limited spoil elevation to increased mining depths, prestripping and increasingly elevated mesa-like Landforms. As a result of this evolution, the stabilisation of modern constructed Landforms is no longer assured through the establishment of vegetation alone. The selection of resilient fragmental spoil types for the construction of final Landform surfaces, and as cladding for stabilising steep erosive batters, is a practical methodology that has the potential to significantly improve rehabilitation outcomes, by increasing surface rock cover, roughness, and infiltration and reducing erodibility. An understanding of the properties and behaviour of individual spoil materials disturbed during mining is required. Relevant information from published literature on the geological origins, lithology, and weathering characteristics of individual strata within the Bowen Basin Coal Measures (and younger overlying weathered strata) has been reviewed, related to natural Landforms and applied to the surface stability of major strata types when disturbed by mining. A spoil classification derived from geological characteristics and weathering behaviour of identifiable lithologic components has been reviewed and refined, demonstrating the application of use of geological information. This classification system is a tool for the allocation of spoil types and use of categories that have application in premine feasibility investigations, Landform design, and material selection and placement. The logic of classifying materials based on their stability in the natural landscape has wider relevance to other mining areas where elevated Landforms of sedimentary material are constructed.
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The application of natural Landform analogy and geology‐based spoil classification to improve surface stability of elevated spoil Landforms in the Bowen Basin, Australia—A review
Land Degradation & Development, 2018Co-Authors: Bevan Emmerton, Jon Burgess, J S Esterle, Peter D. Erskine, Thomas BaumgartlAbstract:Large-scale open cut mining has occurred within the Bowen Basin for over 4 decades, transitioning from shallow mining depths and limited spoil elevation to increased mining depths, prestripping and increasingly elevated mesa-like Landforms. As a result of this evolution, the stabilisation of modern constructed Landforms is no longer assured through the establishment of vegetation alone. The selection of resilient fragmental spoil types for the construction of final Landform surfaces, and as cladding for stabilising steep erosive batters, is a practical methodology that has the potential to significantly improve rehabilitation outcomes, by increasing surface rock cover, roughness, and infiltration and reducing erodibility. An understanding of the properties and behaviour of individual spoil materials disturbed during mining is required. Relevant information from published literature on the geological origins, lithology, and weathering characteristics of individual strata within the Bowen Basin Coal Measures (and younger overlying weathered strata) has been reviewed, related to natural Landforms and applied to the surface stability of major strata types when disturbed by mining. A spoil classification derived from geological characteristics and weathering behaviour of identifiable lithologic components has been reviewed and refined, demonstrating the application of use of geological information. This classification system is a tool for the allocation of spoil types and use of categories that have application in premine feasibility investigations, Landform design, and material selection and placement. The logic of classifying materials based on their stability in the natural landscape has wider relevance to other mining areas where elevated Landforms of sedimentary material are constructed.
Jon Burgess - One of the best experts on this subject based on the ideXlab platform.
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the application of natural Landform analogy and geology based spoil classification to improve surface stability of elevated spoil Landforms in the bowen basin australia a review
Land Degradation & Development, 2018Co-Authors: Bevan Emmerton, Jon Burgess, J S Esterle, Peter D. Erskine, Thomas BaumgartlAbstract:Large-scale open cut mining has occurred within the Bowen Basin for over 4 decades, transitioning from shallow mining depths and limited spoil elevation to increased mining depths, prestripping and increasingly elevated mesa-like Landforms. As a result of this evolution, the stabilisation of modern constructed Landforms is no longer assured through the establishment of vegetation alone. The selection of resilient fragmental spoil types for the construction of final Landform surfaces, and as cladding for stabilising steep erosive batters, is a practical methodology that has the potential to significantly improve rehabilitation outcomes, by increasing surface rock cover, roughness, and infiltration and reducing erodibility. An understanding of the properties and behaviour of individual spoil materials disturbed during mining is required. Relevant information from published literature on the geological origins, lithology, and weathering characteristics of individual strata within the Bowen Basin Coal Measures (and younger overlying weathered strata) has been reviewed, related to natural Landforms and applied to the surface stability of major strata types when disturbed by mining. A spoil classification derived from geological characteristics and weathering behaviour of identifiable lithologic components has been reviewed and refined, demonstrating the application of use of geological information. This classification system is a tool for the allocation of spoil types and use of categories that have application in premine feasibility investigations, Landform design, and material selection and placement. The logic of classifying materials based on their stability in the natural landscape has wider relevance to other mining areas where elevated Landforms of sedimentary material are constructed.
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The application of natural Landform analogy and geology‐based spoil classification to improve surface stability of elevated spoil Landforms in the Bowen Basin, Australia—A review
Land Degradation & Development, 2018Co-Authors: Bevan Emmerton, Jon Burgess, J S Esterle, Peter D. Erskine, Thomas BaumgartlAbstract:Large-scale open cut mining has occurred within the Bowen Basin for over 4 decades, transitioning from shallow mining depths and limited spoil elevation to increased mining depths, prestripping and increasingly elevated mesa-like Landforms. As a result of this evolution, the stabilisation of modern constructed Landforms is no longer assured through the establishment of vegetation alone. The selection of resilient fragmental spoil types for the construction of final Landform surfaces, and as cladding for stabilising steep erosive batters, is a practical methodology that has the potential to significantly improve rehabilitation outcomes, by increasing surface rock cover, roughness, and infiltration and reducing erodibility. An understanding of the properties and behaviour of individual spoil materials disturbed during mining is required. Relevant information from published literature on the geological origins, lithology, and weathering characteristics of individual strata within the Bowen Basin Coal Measures (and younger overlying weathered strata) has been reviewed, related to natural Landforms and applied to the surface stability of major strata types when disturbed by mining. A spoil classification derived from geological characteristics and weathering behaviour of identifiable lithologic components has been reviewed and refined, demonstrating the application of use of geological information. This classification system is a tool for the allocation of spoil types and use of categories that have application in premine feasibility investigations, Landform design, and material selection and placement. The logic of classifying materials based on their stability in the natural landscape has wider relevance to other mining areas where elevated Landforms of sedimentary material are constructed.
