These wild ostriches (two female on the left hand side, one male on the right) are lined up alongside the boundary between the Congo and the Kalahari cratons in southern Namibia. The craton boundary is marked by a visible fault scarp. (c) Geology for Global Development 2013
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GeoLog
Muon musings – how penetrating particles could let us peer beneath Mars’ surface
Muons are penetrating particles generated by cosmic rays. Muon radiography – or muography – is the large-scale equivalent of using x-rays to generate images. Except, instead of using x-rays to take a closer look at your broken arm, we can use showers of muons to take a look inside large geological structures – we’re talking several kilometres in size here! When cosmic rays meet the atmospher ...[Read More]
Geology for Global Development
In the News (June 2013)
We highlight some of the items that have caught our eye in the news recently Volcanic History In a recent study, published in IOP Science, Irish historical records were used to trace the impact of volcanic eruptions on climate over a 1200 year period. Geological events are recorded by geochemical proxies and physical changes within the rocks – these are the lines of evidence that geol ...[Read More]
GeoLog
Imaggeo on Mondays: Aerosols over Hurricane Irene
This image – rather than our usual Imaggeo photo – is a simulation representation of Hurricane Irene, as it moved up the coast of the United States. The red-yellow areas in the image represent regions with high aerosol concentration that have been swept upwards in convective clouds and the blue areas are clean regions. The aerosols enter Irene along rain bands, before being wrapped into the centre ...[Read More]
Geology for Global Development
Guest Blog: Disaster Resilience in Dharamsala, India
John McCarthy and Sam Bradley are collaborating to develop an earthquake awareness and disaster resilience program for vulnerable communities in Dharamsala, India. The region is predicted to have an extremely large earthquake in the next 50 years and they are looking to raise awareness, develop community programs and improve the resilience capacity for the population. John and Sam both have Master ...[Read More]
GeoLog
GeoCinema Online: Making Measurements
Making measurements from the space and looking to the skies has hugely enhanced our understanding of the Earth, it’s surface processes and its movement in space. This short episode of GeoCinema Online takes you through some of the great technological developments in the Earth and planetary sciences! Looking Down a Well: A Brief History of Geodesy Geodesy is a field of study that deals with ...[Read More]
Geology for Global Development
Friday Photo (83): Wildlife in the Field – Giant Millipede Inspects Stromatolites
A giant millipede kindly provides a scale for a photo of some stromatolites in the Nama group, Namibia. Microbial communities grow upwards towards the light. Each growth phases is cemented by carbonate grains that stick to the sticky EPS substance that the communities produce, forming layered stromatolite columns. The stromatolites pictured above formed 550 million years ago – just as some o ...[Read More]
GeoSphere
Geology Photo of the Week #35
This edition of the photo of the week highlights something I feel that I should have explained a long time ago: my banner photo. The banner photo above is more than just a pretty picture. It actually illustrates, very beautifully, a truly interesting phenomenon that can be encountered in Arctic watersheds. I speak of the aufeis, pronounced oh-fyse, which is the giant sheet of ice covering the rive ...[Read More]
Geology for Global Development
Guest Blog: Programme Review – Rise of the Continents
Helen Ashcroft is currently a DPhil student at the University of Oxford. She blogs for the Bang! Science Magazine (Planet Blog) and is also a STEMNET Ambassador, working to promote science, technology, maths and engineering to young people. Helen has written for the GfGD Blog before, about career paths in the development sector and the economics of natural resources. Today, Helen reviews Professo ...[Read More]
GeoLog
Geosciences Column: Tracing Toba
Large volcanic eruptions have a significant impact on the Earth’s climate as aerosols (including sulphur dioxide and water vapour), together with ash are released into the atmosphere and increase the amount of sunlight reflected back into space (the albedo). This increase in reflectance (or decrease in energy absorption) can cause widespread climatic cooling, known as a ‘volcanic winter’. However, ...[Read More]