The Stirling fauna: big critters from the dawn of time?

I really wasn’t intending to leave Geopuzzle 14 hanging out unanswered on the interweb for as long as it has – and not just because my delay has apparently put my beer stash in jeopardy. The answer is actually both rather interesting, and rather controversial – because if this, and the other things that this was found with, are the imprints of large multicellular organisms, as their discovers claim, then we may have to significantly rewrite the history of life on Earth; for the rocks that they are found in are almost 2 billion years old.

gp14.jpg

Continue reading

Categories: fossils, geopuzzling, paper reviews, past worlds, Proterozoic

50 minerals to see before you die

I’m not sure I’m really wise in jumping on this meme (started by Chuck and taken up by Hypocentre, Silver Fox and Callan), because I have a feeling I’m going to end up feeling a little inadequate; my heavy does of physics as an undergraduate means my mineral identification skills are a little underdeveloped.
50 minerals everyone should see (bold=seen in the wild, italic=seen in captivity, be it lab, museum or some other non-field location):
Andalusite
Apatite
Barite
Beryl
Biotite
Chromite
Chrysotile
Cordierite
Corundum
Diamond*
Dolomite
Florencite
Galena
Garnet
Graphite
Gypsum
Halite
Haematite
Hornblende
Illite
Illmenite
Kaolinite
Kyanite
Lepidolite
Limonite
Magnetite
Molybdenite
Monazite
Nepheline
Olivine
Omphacite
Opal
Perovskite
Plagioclase
Pyrite
Quartz
Rutile
Sanidine
Sillimanite
Silver (native)
Sphalerite
Staurolite
Sulphur (native)
Talc
Tourmaline
Tremolite
Turquoise
Vermiculite
Willemite
Zeolite
Zircon
*I have visited diamond-bearing alluvial gravels in western South Africa, but we weren’t allowed to touch anything.
I’ve stuck with Chuck’s original list, although I note that, in true geologist style, most peoples’ responses have more than a hint of ‘you didn’t mean that 50, you meant this 50!’. Perhaps I should have added in more magnetic minerals – and I am disappointed by the lack of epidote, which is the same colour as pistachio nuts and therefore has pleasurable associations for me.
Of course, for some of these, a field identification would be quite an achievement; I’ve doubtless visited outcrops containing thousands upon thousands of zircons, since they are pretty much indestructible and are therefore found in many igneous, sedimentary and metamorphic rocks, but spotting one is a little challenging…

Categories: geology, rocks & minerals

It’s Monday so I must be in…

Spending time in my home country has become a rather fraught affair in the last couple of years – because I don’t live here, and my family and most of my friends still do, any visit back to British shores becomes a mad rush around all the various corners of the UK that people I know have spread themselves around into. Since I arrived almost three weeks ago, I’ve been to Colchester, Reading, Sheffield, and Edinburgh, as well as taking a number of trips into London (where I managed to meet Bob*, and share a pint or three with GrrlScientist and a constantly inebriated Professor Steve Steve. I’m now in Southampton for a few days, where things look like they’re going to settle down a bit – lab work, paper corrections and (hopefully, finally) a bit of blogging.
The problem comes when I realise that all this mad dashing around, fun as it is, has basically been my holiday. I’m not bemoaning the fact that I didn’t get to veg out on a beach – in such situations I’m normally climbing the walls within a day – but it does feel weird that I’ve spent all my free time, and more than a little of my meagre salary, visiting a place where in many ways I still feel more at home than my current, actual home.
Anyway, the good news for you people is that the “holiday” is over, and thus normal(ish) service is about to resume.
*I would point out that although Bob claims to have won Mornington Crescent, he forgot to turn 3 times widdershins before re-occupying Piccadilly Circus, which as everyone knows is automatic disqualification.

Categories: bloggery

Hydrogeology is hot!

Whilst transferring hemispheres, hydrogeologist Anne Jefferson has kindly provided another of her excellent guest posts.
Close your eyes. (OK, maybe keep them open so you can read the rest of this post.) Imagine a geosciences specialty where there are lots of jobs right now. Now imagine a specialty where there are lots of jobs year after year after year. In fact, imagine a specialty where, according to the American Geological Institute, there are four jobs for every qualified graduate and it is described as “recession-proof.”
What specialty did you imagine? If you answered “hydrogeology” you’ve either studied the job market or you’ve read a feature in the 8 August issue of Science.

Continue reading

Categories: academic life, by Anne, geology, hydrology

A (hopefully) brief pause

Sorry for the sparse posting over the past few days – I’m about to depart on a trip back to my homeland, and because it’s not just a holiday this time – I’m doing some lab work – I had some preparatory work to get through. Cutting lots of rock samples down into teeny tiny cubes so they’ll fit in the machine I’m going to be using was a little bit fiddly and time-consuming, as it turned out.
Once I’ve set up back in the UK, I shall return with geopuzzly answers and other rambling. Stay tuned.

Categories: bloggery