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Lecture
Co-evolution of geological and biology from a mineralogical perspective
• Earth's surface harbours at least 5809 known minerals, but when Earth first formed 4.65 billion years ago, it had about 420. Moreover, what is common on the surface today was uncommon then. Many rocks and minerals have come into being while others have become extinct. • The overall increase...Walcott, Rachel
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2022
Blog post
GeoCASe 2.0 and the evolution of data from physical specimen to the digital
As Principal Curator of the National Museums Scotland’s (NMS) 200 year old ‘Earth System collection, a collection of 70000 minerals, rocks and meteorites, one of my responsibilities is to ensure the collection puts its best foot forward into the Digital Era. So for the past few years, I have lead...Walcott, Rachel
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2021
Video
NMS Earth Systems collection virtual tour
Virtual tour of the Earth Systems collection at National Museums Scotland. Shown as part of the Scottish Geology Festival 2021.Brown, Emily ; Walcott, Rachel ; Davidson, Peter ; Gooday , Bob
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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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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
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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