My first conference, EGU 2014

Last week (and after less than 20 hours after returning from the Slapton field course) I flew over to the European Geosciences Union (EGU) conference in Vienna, Austria. This is an annual event where both academic and industrial research scientists present their latest findings across the whole spectrum of the geosciences – from deep earth geophysics to astrobiology and everything in between.


I was attending to present my poster ‘The Mediterranean coral Cladocora caespitosa as a high resolution Pleistocene palaeoclimate archive’ basically summing up my lab results from the last few years as part of a session on isotopes and palaeoclimate. This was my first conference, as it’s taken nearly three years of research to get enough data to be worth talking about. It’s kind of depressing to see how easily three whole years of work can fit onto a single sheet of paper…

As much of my poster as I can post on here, it's all unpublished cutting edge stuff everybody's going to well want to plagiarise...maybe

Arriving to my hotel around midnight, still broken from the aforementioned week’s demonstrating, I was very relieved to find the hotel that the university had agreed to book me into (purely chosen by its proximity to the conference centre) was much fancier than expected. Staggering into the rather impressive hotel lobby, tired, smelly and with my enormous trekking rucksack I'm not sure whether myself or the receptionist was more surprised that I was actually staying there (“ …Err…Yes…You are in the right place…Mr Royle”).

Unfortunately, it quickly became apparent that the conference was not going to be quite as relevant to my area of expertise as I’d hoped. All of the isotopic sessions were dominated by people studying recent plants & waters, while the interglacial climate sessions were overrun by modellers claiming that all the carbonate isotope palaeoclimate proxy records must be wrong as they didn't agree with their pretty models and computer simulations…

The impressive Austria Centre, where the conference was held  (photo from here)

However, the two people who did come and find my poster really knew what they were talking about, one of them having read and asking about some rather obscure papers on trace element uptake in Cladocora I hadn't even referenced on the poster and the other asking me tricky questions about clumped isotopes that I somehow blagged my way through. Between them though I got some really helpful feedback and good ideas on increasing the robustness of my results; this does mean a little bit more time in the lab but hopefully it should be worth it, as some of the things I hadn't thought about definitely seem like the kind of questions a viva examiner could catch me out with. So it was definitely worth presenting there for in that respect.

While the conference wasn't quite so useful for me for relevant networking potential, it was still a brilliant experience from a general interest perspective. I did not realise the conference would be so big and with over 4000 talks happening over the week there was always something interesting to listen to. I spent a lot of time just hanging around general geology talks learning about everything from the latest developments in sedimentary climate proxies, new evidence for the volcanic origins of mass extinctions and details on the tectonics of the Alps (which of course just reinforced how annoying I was finding it being that close to the mountains with no one to go play in them with). I did make the ‘mistake’ of going to an early morning talk by one of my old professors from Liverpool who proceeded to break me with thermodynamics, which was something I was glad to have thought I’d escaped when I graduated.

The ‘scientific’ highlight of the week, however, was a pair of posters by Peruvian researchers (who were nowhere to be found and surprisingly did not have an academic email address) correlated earthquakes, increases in space weather, movement of the Earth’s magnetic field and the start of World War II to Earth passing through the ‘vernal point of Aquarius’ in 1940. They then went on to make a case for this astronomical date to be considered as the start of the Anthropocene (never mind the industrial revolution or the start of widespread agriculture) and that we should relocate the prime meridian from Greenwich to Peru…yeah, OK.

There were a few times when the sheer amount of high level science was pretty overwhelming and I had to get outside and escape it all; thankfully it was about 20°C all week and the local area was beautiful, perfect for morning runs along the Danube.  By the end of the conference I did still feel I’d had my fill of science for quite some time and was looking forward to a relaxing bank holiday weekend back in Norwich.

It was also a really good week on a purely social and ‘touristy’ level. Vienna is a really nice city to explore and there was a large group of both current and ex UEA students there. Most evenings were spent out late eating schnitzel and sampling the local beers, which did, obviously, make getting up for the first sessions of each day less of a pleasant experience.

Vienna seems like an interesting place, would've liked a bit more free time to see more of it

All in all, my first conference was pretty good, even if I would probably have been better off using my conference funding to find one somewhat more relevant to my area. I do have a smaller, one day, UEA organised conference this coming Wednesday called ‘Chronology and Climate’ which I’ll be presenting a similar poster at. This is purely on the palaeoclimate of the last interglacial (Marine Isotope Stage 5e) and has a few carbonate people going so should, hopefully, be a lot more relevant and useful to me, check back in a couple of weeks’ time to see how that goes…

Slapton part III: From Reefs to Deserts, the geological history of Devon

I'm currently typing away while sat under some shady trees outside the Austria Centre in Vienna on a beautiful, sunny, 20° spring day while taking a break from the EGU conference. I have a poster presentation this evening and, to make sure I'm in top condition for it, while there's a gap in relevant talks, I thought I'd relax, go for a decent run around the Donaupark and make a start on my annual write up of last week's first year undergraduate field trip to Slapton, Devon.

Slapton this year was a rather tame affair compared to previous years (check out last-year's blog post for a run through the (repeatable) hilarities) with the students being a rather sensitive (read 'boring') lot. Due to the relative lack of shenanigans, and my attempts to run a sensible, scientific outreach blog here, I thought I'd concentrate on writing up what has always been my favorite day of the trip.

The day's activities come under the title, 'From Reefs to Deserts' and are one of the student's first introductions to the idea of ​​how the UK has migrated across the surface of the Earth and experienced various climactic regimes and sea levels over Earth's history.

Torbay

The day is split into two, visiting two coastal outcrops around Torbay (see map) which show drastically different sedimentary processes and environments of deposition.

 In the morning we drive out to the Devonian type section north of the bay, here we find a sequence of bioclastic limestone through an ancient thriving reef system.

The students on the limestone

Here solitary and colonial corals, bryozoans, bivalves and stromataporids are all abundant in the fossil record, preserved as a life assemblage amongst very clean micritic limestone (see pictures). This shows us that, around 400 million years ago, during the the Devonian, the UK was located within the tropics and Devon, like much of the rest of the country, was covered in a warm, shallow, tropical sea, well away from any sources of terrigenous input.

Devonian fossils, 2 solitary corals, a colonial coral and a stromatoporid  (a simple sponge like animal)

Unfortunately for the reef dwellers, this idyllic spot what not to stay that way; this shallow sea was actually located near to explosive volcanic island-arc (related to the subduction of the closing ocean). Catastrophic eruptions buried the reef under up to half a metre of ash and the rarity of fossils up section from this show that this, and subsequent smaller eruptions, had a great and long lasting effect on the marine environment.

Ash layer in the Devonian limestone

The limestone and ash beds are folded into nicely curved folds and cut by reverse faults. This is due to the distal effects of the Variscan Orogeny, as the continents of Gondwana and Laurussia came together to form the supercontinent Pangea during the late Devonian and Carboniferous periods.

Anticlinal fold in the Devonian limestone

After lunch it's a few kilometers and about 200 million years to the south to Fairy Cove, Paignton. Here we find a sequence of Permian sands and breccia-conglomerates dating back to around 300-250 million years ago. These rocks are deep red in color and can be split into two sets of beds. The lower sets of beds show strong erosional bases, cross-bedding and repeated fining upwards sequences - from cobble-sized breccia-conglomerates all the way up to fine sands. It is obvious these were lain down as wadi deposits in an arid desert environment. The clasts are large, relatively angular and can be easily recognised as being mostly composed of fragments of the Devonian limestone from the morning. These rivers were rapidly eroding a young mountain belt which had been forced up by the coming together of the now vast and arid Pangea supercontinent which the UK which now part of.

Pangea in the Permian (image from)

Over time, possibly as the gradient from the mountains to the sea became shallower as the highlands eroded away, or the climate became even more arid, the power of the rivers waned.

The upper half of the sequence still shows a cyclic sequence of wadi pebble beds going up into fine sands but the clast sizes are all much smaller. At the top of many of the sequences it can be seen that flow ceased and the river bed dried out completely. At these times of increased aridity, fine muds were deposited, these dried out in the sun, shrinking and breaking up into now beautifully preserved desiccation cracks. Normally these delicate cracks do not preserve very well, being torn up by the return of the water. However, at this locality, yellow aeolian sands have been blown in by the wind and infilled the cracks, preserving them to the present day (see photo ).

Permian desert sandstones, wadi deposits with desiccation cracks infilled with (yellow) wind-blown aeolian sands

Desiccation cracks in the mud at the top of the wadi sequences

Knowing my eventual aim, after a few post-doc's, is to get into lecturing, my PhD supervisor who runs this part of the fieldcourse gave me my first taste of actual lecturing by encouraging me to sum up this site to the students in the field, which was an interesting change from the normal demonstrating.

At both sites, overlaying the sequences we find in angular unconformity with hundreds of millions of years' worth of the stratigraphic record eroded away and transgressive lag and Quaternary beach deposits, from the last glacial, just ten thousands years ago, directly overlaying the limestone and sands .

Quatary beach sediments unconformably overlaying the folded and faulted Devonian limestones 

So, being now well into the third year of my PhD, this was almost certainly my last trip to Slapton and, depending where I end up next, probably my last chance for demonstrating to undergraduates for a while. I've really enjoyed my three trips down there, they have really proved to me that Earth Science lecturing (alongside some good solid geology research) is what I really want to get into, for at least a good chunk of my academic career. I hope whoever succeeds me in being the go-to generic Earth Science demonstrator enjoys it just as much as I have, and if they come across these rambles from the last few years they find them useful.

Bonfire on the beach on the last night