This edition of the photo of the approximate week (plus or minus 1 – sorry for my tardiness) is very cool in that it shows when earth processes that are invisible suddenly become very visible. In this case the submarine volcano, El Hierro, is erupting and instead of the usual bursting lava and fireworks display the only evidence of the turmoil going on is this discolouration at the oceanR ...[Read More]
Geology Photo of the Week #47
This week’s photo is another mineralogy themed one. This photo shows beautiful, yet also flattened crystals of the mineral natrolite that has grown in an acicular habit from a central point making them look sort of like little snowflakes. Natrolite is a relatively common hydrated sodium, aluminum silicate mineral (Na2Al2Si3O10 · 2H2O) that often forms within the void spaces of igneous rocks ...[Read More]
ATTA and the Curious Case of Krypton-81
Ok, so I took some license with the title. This isn’t really a curious case and neither Krypton-81 nor ATTA are actually people. In fact, Krypton-81 (81Kr) is a radioisotope of the noble gas krypton and ATTA, which stands for atom trap trace analysis, is the revolutionary technique that has made its analysis possible. I recently heard about developments with ATTA at the IAEA Isotope Hydrolog ...[Read More]
Guest Post: Jeremy Bennett – Approaches to modelling heterogeneity in sedimentary deposits
Hello everyone. Great that you could make it out to my blog post. I would like to introduce you to some ideas about environmental modelling that I have recently discovered during my work. These ideas are from this paper by Christine Koltermann and Steven Gorelick back in 1996. Whilst the primary focus of their paper is on modelling hydrogeological properties such as hydraulic conductivity, I think ...[Read More]
Geology Photo of the Week #46
This week’s photo brings us back to the world of geochemistry. I don’t have much information on this photo beyond that it was taken in Italy. However, if I may speculate a little it looks like these crystals may possibly be volcanic in origin and the fact that it was taken in Italy, which is famous for its volcanic sulphur deposits. I say this because such crystals are often found nea ...[Read More]
I JUST SUBMITTED MY THESIS!!
As you may have gathered from my enthusiastic title I just submitted my thesis! After 6 years of hard work it’s been passed in. To celebrate I decided to make this really cool word cloud showing the most frequently occurring words in the thesis, which currently contains a total of 55,713 words. The bigger the font the more common the word. As you may notice 129I occurs a lot, 1,220 times to ...[Read More]
Geology Photo of the Week #45
This weeks photo is once again related to permafrost and the Arctic….something tells me I miss being there. Anyway, the gorgeous photo below shows a terrific example of polygonal patterned ground from Siberia. Patterned ground is a phenomenon that occurs frequently in cold regions and is caused by the seasonal freeze-thaw of the active layer/soil. This process can produce a phenomenon called ...[Read More]
Thaw Slumps of the NWT
I recently across an article that reminded me of my field work days in the early stages of my PhD in the Canadian Arctic at retrogressive thaw slumps. The article discusses the impending catastrophic drainage of a lake when the thin strip of land separating it from a thaw slump fails (see article), which it will inevitably do very soon. The story has now been picked up all across Canada in the con ...[Read More]
Geology Photo of the Week #44
For a bit of a change of pace the photo of the week this week isn’t a photo at all. Rather it’s a fascinating model output showing ocean surface currents in the North Atlantic. The Gulf Stream is clearly visible as it flows past Atlantic Canada and out towards the middle of the north Atlantic. I am guessing that colour scheme has something to do with current velocity or mass flux or so ...[Read More]
Geology Photo of the Week #43
This weeks photo can be described by one word: mesmerizing. Honestly, it’s hard to tell which part of this photo is better, the beautiful starry sky backdrop or the glow of Kilauea’s smoking crater. Combined, it’s just fantastic. Kilauea is part of the Hawaiian Island volcanic chain which has been formed as the Pacific plate has moved across at hotspot. The volcano is about 300,0 ...[Read More]