Because I really need to spend more time typing random things into Google

David Ng at the World’s Fair has come up with a new game for net-enabled procrastinators everywhere: the “I rank number one on google” meme:

I’d like to suggest a meme, where the premise is that you will attempt to find 5 statements, which if you were to type into google (preferably google.com, but we’ll take the other country specific ones if need be), you’ll find that you are returned with your blog as the number one hit.

This takes a bit of effort since finding these statements takes a little trial and error, but I’m going to guess that this meme might yield some interesting insight on the blog in question.

This was actually a more time-consuming exercise than I thought it would be, since for reasons that escape me some of the more obvious combinations (like “Highly Allochthonous” or “Chris Rowan geology”) all seem to point to ye olde blog rather than the current incarnation. Still, here’s my five:


Personally, I’m not sure whether there’s any interesting conclusions that you can draw from that selection. On the other hand, I was rather amused about how appropriate the first hit for professional doom-mongers was…

Categories: bloggery

Accretionary Wedge #3: an early heads up

After this month’s fiesta of epic death and destruction, Kevin Z of The Other 95% has chosen a more cuddly theme for the next geoblogging extravaganza:

I will be hosting a special edition of the geology carnival, The Accretionary Wedge on November 15. The theme is “Geology and Life” or “Between a Rock and a Squishy Face”. This is a themed carnival asking bloggers to dig deep into their souls and write about how geology affects biology or biology affects geology. I want to hear about personal experiences, current research, field work, anything that crosses these seemingly disparate but all too entwined disciplines that I hold dear to my own heart. I am planning a special post for its occasion as well.

So, not so much ‘Life on Earth’ as ‘Life and Earth’. I’m sure palaeontologists like Brian and Julia will be relishing the opportunity to tell us why they think fossils are so much more interesting than the rocks they’re found in; but hopefully some of the more squishy-thing-inclined around here will also be tempted to contribute. Check out the bottom of this post for instructions on how to contribute.

Categories: bloggery

The Indian plate’s days as a Cretaceous boy-racer

The power of plate tectonics lies in its simplicity: the Earth’s surface is a planetary jigsaw puzzle made up of a couple of dozen rigid, interlocking pieces, and most geological activity on the planet, past and present, is a result of the interactions between these pieces as they either move apart, or bump and grind together. However, understanding that the plates move, and being able to measure their past and present motions, doesn’t mean that we completely understand why they move the way that they do. For example, most plates drift across the face of the planet at roughly the same speed that your fingernails grow: perhaps five centimetres a year. But sometimes they can move much faster, as palaeomagnetic results from India demonstrate [1]. 80 million years ago, as India rifted away from Madagascar during the break-up of Pangaea, it was located about 40 degrees south; 50-55 million years ago – barely a geological eye-blink later – it was almost at the equator, crashing headlong into Asia to create the Himalayas.

Indianreconstructions.png

This corresponds to a total drift of about 4500 kilometres in only 15-20 million years, or almost 20 centimetres a year; in contrast, during the same time interval Africa, Antarctica and Australia, India’s Pangaean neighbours, were drifting around at less than 5 cm/yr. Why the large disparity? New geophysical data, published last week in Nature [2], suggest that the explanation for the Indian plate’s unseemly haste may lie in its surprisingly streamlined underbelly.

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Categories: geology, geophysics, Mesozoic, paper reviews, tectonics

Knees up, Mother Earth

How could I forget the Earth’s birthday? For a geologist, I’m fairly sure that’s an unforgivable sin.
Of course, October the 23rd only has geochronological significance if you believe the biblical calculations of Archbishop Ussher (or possibly one of his contempories), which led to the infamous 4004 BC date being inscribed on the first page of the King James Bible. If you do, you’d have to fit 6010 candles on the birthday cake: assuming each candle takes up 1 square cm of iced real estate, it would have to be about 90 cm across to fit them all on. That’s a pretty big cake.
However, anyone who has bothered to pay attention to reality in the last couple of hundred years knows that if it was really the Earth’s birthday a few more candles would be required – four and a half billion more, in fact. It makes the cake somewhat larger, too:

NYcake.jpg

And with that, creationism’s severe lack of ambition – both intellectual and culinary – is, finally, properly exposed. Creationists would bake our dear home planet a birthday cake which you could fit on your desk. Geologists would bake one that you could probably see from space. Although I imagine that there’d be a few disagreements over the flavour…

Categories: antiscience, bloggery

Kelud and Lusi

The latest from Lusi
It seems that a certain mud volcano is situated less than a 100 km away from the grumbling Mount Kelud, and it is not responding well to the increased geological activity in the area:

Separately, a so-called “mud volcano” located 68 kilometres northeast of Kelut has increased its flow to about 130,000 cubic metres per day amid the rising seismic activity in the area, Soffian Hadi Djojopranoto, deputy head of a government team monitoring the mud volcano, told AFP…

…”We have no reference to forecast what will happen if Mount Kelut erupts,” Djojopranoto warned.

It seems that seismic activity, generated by magma movement, is causing the pressure on the underground aquifer feeding Lusi to fluctuate. As for Mount Kelud itself, the alert level is still at its maximum, and the crater lake continues to bubble…

Categories: geohazards, geology, Lusi, volcanoes