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Earth sciences news

3 Posts tagged with the popo tag
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A team of geologists from the Museum and Imperial College are in Mexico carrying out  fieldwork at two of the most active volcanoes in the world: Popocatépetl (Popo) and Colima. Catch up with their adventures in this series of blogposts.

 

Three weeks of amazing fieldwork at two of the most active volcanoes of the world have come to an end: Popocatépetl and Colima, you have been very generous to us, both in terms of large quantities of promising samples and impressive levels of activity. Now that we are back in London, we want to conclude this blog for the time being with some take-home impressions of our beautiful Mexican volcanoes.

 

As scenic and contemplative these pictures may be, all the steam puff, ash clouds and fresh lava streams are a constant reminder of the immense destructive powers slumbering within these giant volcanoes, posing imminent danger to its surroundings. Both Popo and Colima have shown increasing levels of activity in the last months, making detailed real-time monitoring as well as fundamental studies of the underlying principles of the volcanoes’ dynamics even more pressing and important.

 

Using the samples we collected during the last three weeks, we, at the Natural History Museum and Imperial College will work hard in the future to contribute to the understanding of how Popo and Colima work.

 

There is more fieldwork at Popo to come in the next years, and of course we will be covering these trips at this exact place again. Until then, enjoy the pictures and be sure to watch out for a forthcoming NatureLive event at the Museum’s Attenborough Studio, where we will be talking in detail about our exciting trip to Popo and Colima! Thanks for reading.

 

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Popo as seen from Paso de Cortes: The wind blows the impressive steam plume to the NE.

 

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Looking South: The mildly snow-capped Popo towers in a surreal way over the trees surrounding ‘La Cascada’ resort.

 

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A last view from our hotel in Amecameca: Popo bids farewell to us with a nice trail of steam puffs.

 

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The danger within the clouds: Fuego de Colima. Even through the cloud cover, one can make out the gases that are constantly exhaled from the summit.

 

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The black lava flow in the center of this image has been emplaced during the last two years of activity of Fuego de Colima. The ‘clouds’ you can see here are actually gases coming from this lava flow, which is still hot.

 

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Twin peaks: The steaming, several hundreds of degrees hot summit area of Fuego de Colima in the foreground, and its snow-capped older sister volcano, Nevado de Colima, in the background.

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A team of geologists from the Museum and Imperial College are in Mexico carrying out  fieldwork at two of the most active volcanoes in the world: Popocatépetl (Popo) and Colima. Catch up with their adventures in this series of blogposts.

 

After our dirty but successful pumice-rich first week at Popocatépetl, we were all happy to get that dust off our shoulders and start chasing the various lava flows that make up most of the volcano edifice. Now, if the whole volcano is built by lava flows, it should be really easy to find these rocks, shouldn’t it? The short answer is: no. The longer, picturesque answer will take you into the wild, rough and bumpy world of Popo’s lower flanks, where a good rock is as hard to find as a sleeping baby lion in the vast African savannah. Join us on the magical ROCK SAFARI!

 

Early in the morning, when Popo is still entangled by the night’s misty claws, we make our way from the hotel in Amecameca towards the south-eastern flank of Popo, the land of the sneaky rocks.

 

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Somewhere down there they are hiding: the Popocatepetl lava flows!

 

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On the lookout for rocks: moving in this terrain makes you reconsider what you may call a ‘road’.

 

What makes it so difficult to find these lava flows is the fact that most of them are buried by a thick cover of the Popo pumices (not again!) and lahar deposits. So in many cases the only thing we can find on top of these dirty deposits are loose boulders of rock, which we can’t even be sure belong to the place we find them lying. A tedious job requiring lots of caution!

 

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An easy catch: can you spot the rock?

 

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Julie finds a rock that has tried to hide away from our hammers…

 

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…we took care of it.

 

Such a seek-and-destroy campaign can easily take a couple of hours for one lava flow and is not necessarily successful. However difficult it may be, when you finally spot a nondescript, lichen-covered rock specimen, the adrenaline you feel while smashing it into pieces to see what species it is pays off generously.

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Another boulder from a Popo lava flow successfully tracked down.

 

One factor that contributes to our (otherwise rather questionable) sense of adventurism during this rock safari is the daily recurrence of a group of local forest watchdogs roaming around the terrain. The first time they came, they only surrounded our car with a grim look on their faces, checking if we were hunters (if they could only know!).

 

The second time, they had machetes (they were cleaning the roads from vegetation) and we had to give them some money so they’d let us pass. The third time, it was already getting dark, and they had shotguns to guard a road against any people with mischief in mind. We certainly didn’t at this point. The good thing is that by now they know us and they greet us cheerfully every time we pass them.

 

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Obviously, we weren’t keen on photographing the shotgun watchdogs, so instead we present evidence that some lava flows are not good at hiding away. This the Nealticán lava flow, which is the most recent of Popocatépetl’s lava flows (in geological terms, ‘recent’ means younger than 2,000 years). Because of its young age, it is not covered by a lot of deposits and is thus widely exposed. Unfortunately, this flow is the exception to the rule.

 

In this manner, we have chased down a couple of lava flows in the past few days. We are very happy with the outcome of our rock safari and can’t wait to introduce these samples to their new temporary habitat while they are shipped to the UK: cardboard boxes!

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We are delighted to welcome you to our Popocatépetl blog, which for the next three weeks will be fed with facts, anecdotes, pictures and maybe even videos of our fieldwork at two of the currently most active volcanoes in the world: Popocatépetl (henceforth: Popo) and Colima (henceforth: Colima).

 

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Our very first view on Popo, at dawn in Amecameca. Not yet convinced? Scroll down and prepare to be amazed!

 

But first things first: introductions. Our team includes Chiara, volcano-addicted petrologist at the Museum, Julie, passionate geochemist and lecturer at Imperial College, and me (Martin), their new PhD student. I'll be focusing all my energy on Popo in the coming years.

 

Together, we're setting out to shed light on what makes Popo erupt, a poorly understood yet very important issue, since there are more than 30 million people living around Popo – that’s about half the population of the UK! By analysing the rocks and crystals that Popo has erupted in the last 23,000 years, Chiara, Julie and myself are trying to find out more about how Popo works, which will hopefully help in forecasting future eruptions and keeping the people living there safe.

 

But to do all this, we first need rocks – a lot of rocks! And that’s exactly why we are in Mexico right now. Together with our local colleagues, Hugo and Guillem, we will spend our days at the volcano, looking for the freshest rocks around and putting them into plastic bags. As Popo is quite active in the moment, this is a quite exciting and dangerous task!

 

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Popo is in a steamy mood these days.

 

But before we dive into excitement and danger with you, we want to give you an idea of our experiences during the last 48 hours. We started in London Heathrow (25.3m above sea level) on Sunday night, arrived in Mexico City twelve hours later, went straight up to Paso de Cortes (3,400m a.s.l) to get a close grasp of Popo, then had a decent rest in our hotel in Amecameca, just to get up again at 5.30 the next morning for a 10-hour day of die-hard pumice sampling at almost 4,000m a.s.l.

 

Now we are a bit tired – so we thought we would give you and us an easy start with some Popo pictures, taken all around the volcano. You will surely agree that Popo is in good shape, and a truly admirable volcano – ‘a proper strat’, as Julie put it musically.

 

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Popo as seen from Paso de Cortes - preparing for the big bang?

 

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Volcanic eruptions are not the only danger lurking at Popo's flanks. Luckily Julie knows no fear and chases away the feral cow.

 

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After the cow-shock we seek comfort in some good old volcano stratigraphy!

 

If you want to know what Popo does next, how we deal with the thin air and the cows, and how fashionably we collect both hard and soft rocks, we urge you to come back here. Also, don’t be afraid to leave comments, questions, and general thoughts about volcanoes.