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Journal article
Rupture geometries in anisotropic amphibolite recorded by pseudotachylytes in the Gairloch Shear Zone, NW Scotland
Recent earthquakes involving complex multi-fault rupture have increased our appreciation of the variety of rupture geometries and fault interactions that occur within the short duration of coseismic slip. Geometrical complexities are intrinsically linked with spatially heterogeneous slip and stress drop distributions, and hence need incorporating into seismic hazard analysis. Studies...Campbell, Lucy R ; Phillips, Richard J ; Walcott, Rachel ; Lloyd, Geoffry E
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2012
Journal article
Using hilltop curvature to derive the spatial distribution of erosion rates.
Erosion rates dictate the morphology of landscapes, and therefore quantifying them is a critical part of many geomorphic studies. Methods to directly measure erosion rates are expensive and time consuming, whereas topographic analysis facilitates prediction of erosion rates rapidly and over large spatial extents. If hillslope sediment flux is nonlinearly...Hurst, Martin D. ; Mudd, Simon M. ; Walcott, Rachel ; Attal, Mikael ; Yoo, Kyungsoo
landscape evolution, geomorphology, Erosion rates, transient landscapes, hydrology, and sediment transport
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2012
Journal article
Tectonic controls on the evolution of the Clutha River catchment, New Zealand
A synthesis of published information on mountain uplift and river capture in Otago suggests that the Clutha River catchment has evolved westwards and expanded since the Pliocene. River capture events that facilitated catchment expansion are indicated by sediment provenance, drainage geometry and freshwater fish genetics. The catchment has been partly...Craw, Dave ; Upton, Phaedra ; Walcott, Rachel ; Burridge, Chris ; Waters, Jonathon
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2013
Journal article
Influence of lithology on hillslope morphology and response to tectonic forcing in the Sierra Nevada of California
[1] Many geomorphic studies assume that bedrock geology is not a first-order control on landscape form in order to isolate drivers of geomorphic change (e.g., climate or tectonics). Yet underlying geology may influence the efficacy of soil production and sediment transport on hillslopes. We performed quantitative analysis of LiDAR digital...Hurst, Hurst, Martin D ; Mudd, Simon M. ; Yoo, Kyungsoo ; Attal, Mikael ; Walcott, Rachel
lithology, landscape evolution, geomorphology, hillslopes, and LiDAR
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2014
Journal article
Far-field deformation resulting from rheologic differences interacting with tectonic stresses: an example from the Pacific/Australian plate boundary in Southern New Zealand
The Miocene in Southern New Zealand was dominated by strike-slip tectonics. Stratigraphic evidence from this time attests to two zones of subsidence in the south: (a) a middle Cenozoic pull-apart basin and (b) a regionally extensive subsiding lake complex, which developed east and distal to the developing plate boundary structure....Upton, Phaedra ; Craw, Dave ; Walcott, Rachel
crustal rheology, lithology, paleogeography, LiDAR, Otago Schist, tectonic subsidence, Lake Manuherikia hillslopes, and New Zealand
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2016
Journal article
Determination of zeolite-group mineral compositions by electron probe microanalysis (EPMA)
A new protocol for the quantitative determination of zeolite group mineral compositions by electron probe microanalysis (EPMA, wavelength dispersive spectrometry) under ambient conditions, is presented. The method overcomes the most serious challenges for this mineral group, including new confidence in the fundamentally important Si-Al ratio. Development tests were undertaken on...Campbell, L S ; Charnock, J ; Dyer, S ; Hillier, S ; Chenery, Simon …
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2017
Journal article
Squeezing river catchments through tectonics: shortening and erosion across the Indus Valley, NW Himalaya
Tectonic displacement of drainage divides and the consequent deformation of river networks during crustal shortening have been proposed for a number of mountain ranges, but never tested. In order to preserve crustal strain in surface topography, surface displacements across thrust faults must be retained without being recovered by consequent erosion....Sinclair, H D ; Mudd, S M ; Dingle, E ; Hobley, D E J ; Robinson, R …
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2020
Journal article
Museum during a crisis
These are strange times. As I write this (16th March 2020), the number of coronavirus or rather Covid-19 infections is rapidly increasing and I am uncertain whether our Museum, the National Museum of Scotland (NMoS), will even be open to the public this time next week. This 160 year old...Walcott, Rachel
Coronavirus, National Museums Scotland, National Museum of Scotland, and Covid-19