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2023
Journal article
Shackleton and Bruce: disentangling Antarctic geological collections at National Museums Scotland
Amongst the Antarctic geological specimens held by National Museums Scotland are those from collections made during early 20th Century expeditions led by William Speirs Bruce and Ernest Shackleton. Historical circumstances and ambiguous labelling led to the Shack- leton material, from his 1907–1909 Nimrod expedition, being incorporated into the Bruce collection...Stone, Philip ; Walcott, Rachel ; Aspen, Peder
Ernest Shackleton, William Speirs Bruce , Nimrod Expedition, Antarctic geological specimens, and museum collections
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2023
Journal article
Reaching Further with Earth Science Data
Earth Sciences cover a broad spectrum of research fields such as petrology, sedimentology, structural geology, seismology, and geomorphology, to name a few, which aim to understand interrelated processes on the surface and in the interior of our planet. Many of the research questions studied in the Earth sciences, such as,...Walcott, Rachel ; Lehnert, Kerstin
geology, mineralogy, geochemistry, Mineral Extension for Darwin Core, and soil science
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2020
Journal article
Stress fields of ancient seismicity recorded in the dynamic geometry of pseudotachylyte in the Outer Hebrides Fault Zone, UK
Heterogeneous sequences of exhumed fault rocks preserve a record of the long-term evolution of fault strength and deformation behaviour during prolonged tectonic activity. Along the Outer Hebrides Fault Zone (OHFZ) in NW Scotland, numerous pseudotachylytes record palaeoseismic slip events within sequences of mylonites, cataclasites and phyllonites. To date, the kinematics...Campbell, L R ; Lloyd, G E ; Phillips, R J ; Walcott, Rachel ; Holdsworth, R E
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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
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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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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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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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 …