No video :(

Strange Pebbles at Scott Base

Подписаться 25 тыс.

Просмотров 3,1 тыс.

50% 1

Scott Base is built on a flow of basalt lava that erupted from the nearby Crater Hill. Strangely there are pebbles of granite on the lava flow that have somehow been transported naturally from the Transantarctic Mountains tens or even hundreds of kilometres away.
Keen to massively boost your impact as a science communicator? More info here: courses.outthe...
Want to inspire school students about your science? Check here: courses.outthe...
Interested in my activities, thoughts and ideas on science communication and education? Sign up for my NEWSLETTER:
julianthomson....
With thanks to Antarctica New Zealand videographer Anthony Powell for use of some of his drone video clips.

Опубликовано:

13 янв 2023

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 77

@bobmurdoch4719 Год назад

I have a tin of these pebbles which I collected in 'the old days' when Iwintered over in 1966-67. The theory then was wind blown. Yes we did all grow beards in those days, lack of water mainly. Those plus a number of other specimens have accompanied me around the World. Cheers Bob

@OutThereLearning Год назад

Thanks so much Bob for sharing your experience and connection with Scott Base!

@frankvsupermacalite Год назад

Commenting purely to try boost engagement. You deserve more views!

@OutThereLearning Год назад

Thank you kindly :-)

@mrbbqcraig Год назад

Surely the wind would have brought over other interesting stones/ rocks also... glacial movement has to be the primary reason.... could have been a colleague of yours joking around too and placed it there 🕺🎶 Awesome content, cheers to you 🤟

@OutThereLearning Год назад

Haha, thanks for your thoughts.

@bennnyboynzl Год назад

I am with your theory. Love the posts. Don't stop!

@OutThereLearning Год назад

Thanks!

@granodiorite9032 Год назад

What are the ages of these rocks? Could it be a powerful eruption or Maar explosion that brought up the granite? We have something similar here in Kilbourne Hole, NM, USA where a Maar explosion brought up a lot of basalts, olivines, and some granites.

@OutThereLearning Год назад

Interesting thought. No evidence that they have been erupted locally. Cheers

@marklong930 Год назад

That was my first thought too. It was broken off from the bedrock as magma moved through the crust and hitched a ride or was exploded out.

@granodiorite9032 Год назад

@@OutThereLearning this is too interesting, gotta send some grad student out there!

@user-le7qr5fp9e 3 месяца назад

Amazing truly amazing ❤❤❤

@AutomaticBadger Год назад

Interesting! I would guess that glacial transport would be most likely, but it certainly is curious.

@OutThereLearning Год назад

Thanks for your thoughts!

@consciuosnesssoul Год назад

Excellent beard! Just like the ancestors who trod Scott base before you.

@OutThereLearning Год назад

😆

@kiwidonkeyk1656 Год назад

I'm going for wind, there would surely be a lot more erratics if the ice carried it there and some big lumps too.

@rabidbigdog Год назад

What a privilege! I'm sure the camera doesn't do it justice, but the view/surroundings must seem incredible.

@OutThereLearning Год назад

Thank you, you are totally right

@chrissscottt Год назад

Having thought about the granite mystery a bit more, perhaps during a global warm period the granite peppered ice shelf broke up into bergs that happily drifted around dropping their stones as they melted, then one day a huge tsunami carried the dwindling ice bergs up to your present location where they laid like beached whales, slowly melting away to little more than a sparse scattering of mysterious grey pebbles. (or maybe the sea level subsided again exposing the dropped granite but tsunami ideas are far more exciting!)

@OutThereLearning Год назад

Very interesting. Icebergs (which are essentially made of glacier ice) do actually carry rocks within them and as the bergs melt these rocks simple fall out and land on the sea floor - known as dropstones. The next question would be - why are there no obvious marine sediments around the lava flow if these were dropstones, or indeed if a tsunami was involved?

@chrissscottt Год назад

@@OutThereLearning Good question. It would be interesting to know what effect a large tsunami would have on a fractured ice shelf (thinking of those videos you see of piling up ice floes on swollen lakes and rivers in Canada) Maybe there wouldn't be much marine sediment involved. The RU-vid video entitled "Piling Up Ice Floe on Utah Lake" illustrates what I mean.

@Seawithinyou Год назад

Thank you so much for your very captivating videos They are so helpful knowing more about our planet earth 💖🙏🏼

@OutThereLearning Год назад

Your appreciation is appreciated! 🙂

@laude1 Год назад

If there are any erratic boulders around, I'd have to go with the glacial movement. However, I didn't spot any of them on the landscape, unless of course the big boulders rolled further down with the ice melt... I'm intrigued!

@user-le7qr5fp9e 3 месяца назад

Windspeeds have got to reach 100mph maybe more ...ive seen 70 to 80mph winds pick my friend up and carry him a good 10ft and he weighs 14 stone .. so it could be possible....im no exspert but i would have to go with glacier erosion

@Toninz Год назад

Is the granite in abundance?…or a one off piece?

@OutThereLearning Год назад

Thanks - good question. You need to look for them. but there are lots of them scattered around :-)

@johnbaker1256 Год назад

@@OutThereLearning too many to have been dropped by earlier geologists?

@josoapification Год назад

Glacier carried during the ice age before the younger dryas occurred in the north ? This period was apparently when the ice retreated from its maximum in the southern hemisphere ?

@OutThereLearning Год назад

Thanks for your idea!

@josoapification Год назад

@@OutThereLearning thanks i find geology fascinating 👍. I enjoy your posts very much.

@Goldenhordemilo Год назад

I recon something large hit there mountains and sent it flying. Making fragments upon impacting the Scott base island

@OutThereLearning Год назад

I like the hypothesis! - I don't think there is any evidence though!

@davidarundel6187 Год назад

If the Granite blew over to Scott Base , one would presume that at least one side maybe a bit more polished , from it's travels . Had it come with a Glacier , it wasn't near the base of it , or it would have rounded edges - as is , edges appear to sharp . I'm thinking of the stones at Granity , though that may just be water action . How about , spat out volcanically on the far side of the TransAntartic Mountains , and pushed along by wind and other storms , without it sinking to much

@OutThereLearning Год назад

I like your thought process David

@davidarundel6187 Год назад

@@OutThereLearning it's what seemed possible , and I remember days when Fox Glacier came almost to the main highway , and in those same days being able to access the lake at the base of Tasman Glacier , and watching it calve off little icebergs . Granity Beach , mostly rounded speices the of multiply coloured grannites . They would look good as a feature in an Aquarium , from the colours . Thank you for your response .

@chrissscottt Год назад

Cool vid. Re the odd piece of granite, my guess is it's a glacial drop stone from the last ice age.

@OutThereLearning Год назад

Cheers! Maybe....

@gasdive Год назад

My guess when you first picked it up was a drop stone from when sea levels were higher. But that doesn't make sense because the lava field is too new.

@OutThereLearning Год назад

:-)

@Toninz Год назад

I’ll have that playing on my mind for a while 😳👍

@OutThereLearning Год назад

Excellent! :-)

@rfbftp123 Год назад

Guessing it's like the sailing stones in death valley

@OutThereLearning Год назад

Thanks for that comparison - something like that if the wind was indeed the driving force.

@Toninz Год назад

Do the granite pieces some how piece together from thickness etc?

@OutThereLearning Год назад

I didn't check the variety of shapes, or how similar the granite fragments are in terms of their mineral make-up

@huntsurveys7477 Год назад

Prevailing very strong winds over thousands of years

@OutThereLearning Год назад

That has definitely been proposed by some scientists

@katthompson3852 Год назад

I'm going for glacial drop from ice age... granite question is totally groovy 😎

@OutThereLearning Год назад

Thanks!

@michaelaotearoa3839 Год назад

That's a long way to skim a stone.

@OutThereLearning Год назад

True

@rossmcleod7983 Год назад

Glacial, but then there would be some scarification of the basalt. Any grooves/scars that hint at such?

@OutThereLearning Год назад

Good question. See my video on Observation Hill for an answer ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-4cTye0NcXJc.html

@rossmcleod7983 Год назад

I saw that one, which gave me the idea, all credit to you😊. Love your work btw, truly fascinating place, had a friend of my father that spent sometime there in the sixties, came back with a nose that looked like a strawberry. Did they clean up Mt Erubus after the plane crash?

@OutThereLearning Год назад

@Ross McLeod presumably from sun burn?

@rossmcleod7983 Год назад

@@OutThereLearning no, I was told it was frostbite, but maybe Scotch had something to do with it and they were just humouring me. Big drinkers they were.