A new approach to the relief of Great Britain

Clayton, Keith; Shamoon, Nadhim

doi:10.1016/s0169-555x(98)00037-3

Cited by 12 publications

(1 citation statement)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Howard and Kerby, ; Whipple and Tucker, ) and field observations (e.g. Clayton and Shamoon, ; Clayton and Shamoon, ; Kühni and Pfiffner, ; Duvall et al , ; Jansen et al , ; Bursztyn et al , ) both suggest that landscapes built in rocks with higher resistance to erosion will develop greater topographic relief, lower drainage densities, and steeper drainages when compared to those built in more erodible lithologies, assuming no variations in climate or uplift rates. It is also recognized that spatial variations in erodibility can cause discrete topographic features, with knickpoints often located at contacts between units with different bulk rock strengths, separating portions of the landscape with different local relief (Figure e.g.…”

Section: Introductionmentioning

confidence: 99%

Complexities of landscape evolution during incision through layered stratigraphy with contrasts in rock strength

Forte

Yanites

Whipple

2016

Earth Surf Processes Landf

112

194

View full text Add to dashboard Cite

Variation in the erodibility of rock units has long been recognized as an important determinant of landscape evolution but has been little studied in landscape evolution models. We use a modified version of the Channel-Hillslope Integrated Landscape Development (CHILD) model, which explicitly allows for variations in rock strength, to reveal and explore the remarkably rich, complex behavior induced by rock erodibility variations in even very simple geologic settings with invariant climate and tectonics. We study the importance of relative contrasts in erodibility between just two units, the order of these units (whether hard rocks overlie soft or soft rocks overlie hard) and the orientation of the contact between the two units. We emphasize the spatial and temporal evolution of erosion rates, which have important implications for basin analysis, detrital mineral records, and the interpretation of cosmogenic isotope concentrations in detrital samples. Results of the landscape evolution modeling indicate that the stratigraphic order of units in terms of erodibility, the gross orientation of the contact (i.e. dipping away or toward the outlet of the landscape) and the contact dip angle all have measurable effects on landscape evolution, including significant spatial and temporal variations in erosion rates. Steady-state denudation conditions are unlikely to develop in landscapes with significant contrasts in rock strength in horizontal to moderately tilted rock layers, at least at the scale of the entire landscape. Additionally, our results demonstrate that there is no general relation between rock erodibility and erosion rates in natural settings. Although rock erodibility directly controls the erosion rate constant in our models, it is not uncommon for higher erosion rates to occur in the harder, less erodible rock. Indeed erosion rates may be either greater or less than the rock uplift rate (invariant in time and space in our models) in both hard and soft rocks, depending on the local geology, topography, and the pattern of landscape evolution.

show abstract

Section: Introductionmentioning

confidence: 99%

Complexities of landscape evolution during incision through layered stratigraphy with contrasts in rock strength

Forte

Yanites

Whipple

2016

Earth Surf Processes Landf

112

194

View full text Add to dashboard Cite

show abstract

What and where are periglacial landscapes?

Murton

2021

Permafrost & Periglacial

View full text Add to dashboard Cite

Uncertainties about landscape evolution under cold, nonglacial conditions raise a question fundamental to periglacial geomorphology: what and where are periglacial landscapes? To answer this, with an emphasis on lowland periglacial areas, the present study distinguishes between characteristic and polygenetic periglacial landscapes, and considers how complete is the footprint of periglaciation? Using a conceptual framework of landscape sensitivity and change, the study applies four geological criteria (periglacial persistence, extraglacial regions, ice-rich substrates, and aggradation of sediment and permafrost) through the last 3.5 million years of the late Cenozoic to identify permafrost regions in the Northern Hemisphere. In limited areas of unglaciated permafrost regions are characteristic periglacial landscapes whose morphology has been adjusted essentially to present (i.e., Holocene interglacial) process conditions, namely thermokarst landscapes, and mixed periglacial-alluvial and periglacial-deltaic landscapes. More widespread in past and present permafrost regions are polygenetic periglacial landscapes, which inherit ancient landsurfaces on which periglacial landforms are superimposed to varying degrees, presently or previously. Such landscapes comprise relict accumulation plains and aprons, frostsusceptible and nonfrost-susceptible terrains, cryopediments, and glacial-periglacial landscapes. Periglaciation can produce topographic fingerprints at mesospatial scales (10 3 -10 5 m): (1) relict accumulation plains and aprons form where long-term sedimentation buried landsurfaces; and (2) plateaux with convexo-concave hillslopes and inset with valleys, formed by bedrock brecciation, mass wasting, and stream incision in frost-susceptible terrain.

show abstract

British Isles

Bird¹

2003

The World’s Coasts: Online

View full text Add to dashboard Cite

A new approach to the relief of Great Britain

Cited by 12 publications

References 5 publications

Complexities of landscape evolution during incision through layered stratigraphy with contrasts in rock strength

Complexities of landscape evolution during incision through layered stratigraphy with contrasts in rock strength

What and where are periglacial landscapes?

British Isles

Contact Info

Product

Resources

About