There aren't many locations on the planet where non basalt hexagonal columns exist. Rhyolite composition hexagonal columns are especially rare. Another location with rhyolite hexagonal columns is the Long Valley Supervolcano in California.

@wtpauley

2 жыл бұрын

Up until just now, I thought only basalt formed/cooled into hexagonal columns, thanks.

@lynnmitzy1643

2 жыл бұрын

What are The Palisades, in New York ?

@buzz1913

2 жыл бұрын

May I suggest to cover Mt hibok Hibok. After taal and Pinatubo erupted the past months. I am worried that Mt Hibok hibok will erupt in the near future. Especially the Volcano is within a highly populated island.

@outlawbillionairez9780

2 жыл бұрын

Is it necessary for the Rhyolite or Basaltic columns to cool over an exceptionally long time to form? How long?

@GiantsGraveGaming

2 жыл бұрын

We have some in the south-east in Sardinia.

Legitimately look forward to your upload every day

@Dakotaraptor_Official

2 жыл бұрын

Me to

This is extremely fascinating! I was born in HK and lived there until I was 10 years, but I never knew about its geologic past. Schools didn't teach this stuff at all. One thing I do wonder is how all the volcanic rocks affect the construction of high rises.

@biohazard512

2 жыл бұрын

Volcanic rock is hard, good for building highrises

@annychest718

2 жыл бұрын

@@biohazard512 In the face of fault lines..and high pressured magnum Nothing is hard

@hoosinhan

2 жыл бұрын

Auckland NZ also sits on top of a supervolcano.

@GeologyHub

2 жыл бұрын

@@hoosinhan Auckland is on top of a volcanic field; you are thinking of the Taupo supervolcano

@hoosinhan

2 жыл бұрын

@@GeologyHub what is the connection between Taupo and Auckland volcanic field? They are far from each other, right?

For all the studying, I tried to do when I was younger,I never knew there was any volcano there. It's embarrassing to admit but great to know we can educate ourselves by watching your videos. Thank you!

@christinemusselman5499

2 жыл бұрын

Don't feel too bad. Science is revealing new things all the time. That's why these vids are so helpful. They allow us to keep up somewhat with changes in our understanding without not a lot of time spent. I really enjoy these volcano vids!

@cacogenicist

2 жыл бұрын

Unless you were told it specifically, I suppose you would had to have noticed the rhyolitic tuff and granite in the area, in order to come to the realization that the region had a volcanic past.

If you watch this guy long enough, you'll eventually find out you're living on top of a supervolcano.

@Sphynx93rkn

2 жыл бұрын

Lol. Yeah, i live on top of Deccan Traps xD.

@Diamerald

2 жыл бұрын

Already knew that.

@ginnrollins211

2 жыл бұрын

The closest ones to me are Timber Mountain, Wah Wah Springs, Long Valley, Valles Caldera, and Yellowstone.

@stephenmartin5539

2 жыл бұрын

The only piroclastic flow these days is comming out of the white house press.Secretary jen psaki.

@stephenmartin5539

2 жыл бұрын

They cal it a lie-ro- classless -flow

I never knew that Hong Kong had a super volcano, but I fear is that a lot of the Hong Kong landscape was likely formed by a past volcanic eruption. Or a type of volcanic field.

@annychest718

2 жыл бұрын

Volcanoes are mere vents for what occurres under the sea and bolts through earth's fault lines in every direction

@eriklerougeuh5772

2 жыл бұрын

biggest difference with most known supervolcanoes like yellowsotne is the time frame. 150million years is damn old. earth and continent were totally different a tthis time., yellowstone caldera is less than 2m year old. and by example if you know great canyon , brice canyon in usa, its 3000meters high, 70million years ago it was a sea...and only 20.000years ago the sea was -150meters lower, we think nature as permanent, it can be true at human scale, but at geologic scale its very different, and today we can rase mountain by mining, we can build cities in decades, i wish good luck to future archeologue for know what happen to earth during mankind industrial era :D

Id love to see a video about the flood basalts of south eastern Australia, with their original calderas around smeaton, victoria, australia (there are upwards of 7 of these clustered around, supposedly, a single huge caldera). The flows reach all the way to port phillip bay (+ Melbourne).

Wow... impressive!😯

It seems like there's a new Supervolcano being discovered everyday but at lest this one is extinct and has no chance of ever going off again,

@annychest718

2 жыл бұрын

How do you know that? There's a limit to what we know about what's occuring under the earth and oceans

@loblowry6282

2 жыл бұрын

not quite, many extinct volcanoes are back. This one might be back too.

Wow I lived in HK 1985-1995 and had no idea about any of this. I am now struck by my lack of curiosity about HK's geology as I always found the nearby South China Karst to be the most dramatic landscape in the world. I am also reminded of a junk trip out to the eastern islands where my Dad and I wondered about a particularly strange prominence on the coast of one which looked like it had been pinched and stretched by some giant hand. We speculated if it was something volcanic. I guess it likely was!

Thanks for all your vids, you rock.

@scrappydoo7887

2 жыл бұрын

Ba dum dum tish

Could you do a video on the geography of southern ohio or the ancient impact crater that is in southern ohio?

@tinkhamm7251

2 жыл бұрын

Yes, this would be cool geology to learn. I'm in Middletown, where are you Jimmy?

@annychest718

2 жыл бұрын

I love that.. there's little about impact craters and astroid formations..when compared to study of volcanoes and earthquakes.. As geologists discovered them..scientist tried to cover them up or keep them out of the books.. why? was it because they got a couple of things wrong and they hate to back track? Or because they don't want to draw attention to the diverse other worldly mineral compositions I don't know

@1224chrisng

2 жыл бұрын

in terms of the midwest, one interesting area is the Driftless Zone in Illinois, the terrain resembles New England more than the rest of the midwest

That something new and fascinating facts learned about HK, Really cool thank you.

And don't forget the hollow Earth entrance Godzilla opened....🤣

Holy spotless cheetahs Batman!, Been there alot but had absolutely no idea, thanks and interesting

really wish these videos were longer and more detailed but still good work!!!

Wow is right. This is amazing info. Thank you again

Had no idea! Really cool upload

I'm a Geology geek. Your video's are my favorite...

Just a question, as you stated that there were several smaller calderas, Like Lantau, would that make the island present day a resurgent dome?

This is interesting and educational 👍

I had no idea Hong Kong was sitting on a super volcano. That wasn't taught in Geology in college in the 80's. Everybody worries about Yellowstone, but they are literally all over the world. It's ironic that that which protects and nurtures us can just as easily snuff us out. We depend on a magmatic core to create a magnetic field that deflects solar radiation away, and it's the source of our atmosphere, and soil, and so on: And it's a ticking timebomb. Feel better now?

@670HP-Package-NOW

2 жыл бұрын

Worrying about stuff you can't stop isn't a great mindset, it's better to focus on what we can do to roll with the punches. Improvise, adapt, overcome.

@annychest718

2 жыл бұрын

Earth doesn't have a magnetic core.. who suggested that Einstein? and his gravy theory lol The magnetic field..and why things don't fall off into space..is more to do with other planet forces attracting and repelling to within an inch of our lives..that keep earth on the stable course of its cycle

@dorseyblack9833

2 жыл бұрын

@@annychest718 I didn't say magnetic, I said magmatic.

Hexagonal columns are so cool 💕😺🌋

I have a question. What makes the deposits form hexagonal columns instead of ignimbrite, typically seen in supervolcanic deposits? At least if it was a lava flow, but this was a highly explosive eruption

@dorseyblack9833

2 жыл бұрын

The lava takes a long time to cool, a prerequisite for crystalline structure like quartz for example.

@dorseyblack9833

2 жыл бұрын

Upon re-reading your question, I think I should add that after the initial eruption, magma can fill the caldera, cool slowly, then be exposed over time due to erosion.

@augustolobo2280

2 жыл бұрын

@@dorseyblack9833 Yeah I understand how the hexagons forms, but the hexagons usually appear after effusive eruptions. For an such massive explosive eruption you'd normally expect large ignimbrite deposits. Ok, in a post explosive there could have existed a effusive phase, although lava flows made of rhyolite are extremely rare, the only places I know where they happened is Yellowstone and Newberry. That lava should have formed lava domes. Or maybe what happened was a different process I don't understand. What I really wanted to know is, why there are rhyolite haxagons, formed in a super explosive eruption, and also, having the process that formed them understood, why this eruption formed them, while there's no such thing in pretty much all of the other supereruption deposits, where you basically have ignimbrite welded tuff. It's a very interesting discussion

@annychest718

2 жыл бұрын

@@augustolobo2280 Yeh not all craters are super volcanoes

@augustolobo2280

2 жыл бұрын

@@annychest718 Which crater do you mean by that?

00:35 Forgive me if I am wrong, but vertical cracks in the rock photographed here are examples of columnar jointing, which occurs when basaltic lava cools and solidifies, not from ash.

There is a large geopark in the east of hong kong It was an interesting visit

The giants causeway is another excellent example 👍

Thank you 🙏☀️🙏

Do you have a video about Melbourne Australia. Specifically Mt Dandenong?

You should cover Mount Sheveluch. Ash from the volcano could affect parts of Alaska.

Is the GREAT BASIN NEVADA a future eruption site due to spreading and reduced surface cover?

Hi, is it possible to do a study of the tectonic interactions of the Eurasian Plate and the Pacific-Philippine Sea(-Izanagi Plate), etc. that result in this super volcano?

I was stationed in Hong Kong in the 1980’s and never knew that I lived on a volcano and 40 years later, I find myself living on another. Great video again! SEMPER FI 🇺🇸🇺🇸🇺🇸

Are the ryolight hexagon structures the same as at Devil's Tower Wy.

Apparently the islands off of Portugal are rocking and rolling. Hopefully you cover those volcanoes and get more warning out to people

What do you know about Puracé volcano in southwestern Colombia? National Geological Service have raised risk level from green to yellow, and there is ground deformation and augmented seismic activity around the volcanic edifice and rock fracturing. I'd really appreciate if you take a look at this!! Greetings from Bogotá. I love your channel and your work! Keep the nice job!

Please make a video of the tallest active volcano in Mexico: Pico de Orizaba 🌋

Wow!

Who would have thunk it? Amazing!

I want to see the theme video about Changbaishan.thanks.

Looks like you only do volcano stuff , but the geology of Uluru here in Australia is quite interesting. We don't have any volcanos thankfully

@yz4901983

2 жыл бұрын

If you look at some of his old clips you will find that from the SA border across Cic there are a few possible volcanos.

@hoosinhan

2 жыл бұрын

Was Uluru the remnant of a magma chamber?

@annychest718

2 жыл бұрын

How about fault lines and tectonic plates?

@australien6611

2 жыл бұрын

@@hoosinhan nope to my limited knowledge it was left sticking out after the area around it eroded away but don't quote me on that 🙂

@australien6611

2 жыл бұрын

@@annychest718 tectonic plates I don't think so I think we sit on one big one. Fault lines yes very minor ones around the place but I've lived in the Perth area for 45 years and only felt one or two slight shakes, soo very stable compared to some places ✌

Please can you cover the awasa caldera in Ethiopia, and the large eruption of mt osuzu in Japan 15.1 million years ago. Also the Emory Cladera in New Mexico

@Dragrath1

2 жыл бұрын

I was not aware of this type of explosive volcanic system in Ethiopia though I'm not surprised either as Rhyolitic volcanism is often fond in association with continental rift systems. I couldn't find much if anything on the VEI of these eruptions as a consequence of limited sampling but given some of those big Caldera forming eruptions were intense enough to produce ignimbrite deposits at least a few had to have been VEI 6+ It seems the volcanic system is still active within the Corbetti caldera system having 12 explosive eruptions within the last 10,000 years the last identified between ~737 and ~1557 AD with the volcanic complex producing an explosive eruption on average every 900 years or so during the Holocene at least some of which have been VEI 5 events. It is a shame that such a dangerous active volcanic system is so poorly studied....

@cacogenicist

2 жыл бұрын

@@Dragrath1 - Considering the Awasa caldera is supposedly 30 km x 40 km, I would think we're talking more than a VEI-6, eh? It's very strange there's so little info on that system. But I guess now is not a good time to go study it. :-/

My God this is a BEAST...

So could this eruption be a "pyroclastic fountaining" eruption which erupts materials at a speed over 10^9.5 kg/s?

Hello bro can you disscus about colo volcano its a unique volcano

I've been to the Devils Postpile Nat Monument hexagonal columns. Are they rhyolite or are there other columns in Long's Valley that I haven't see?

@BrettVarve

2 жыл бұрын

Devils postpile is composed of a more mafic lava (for simplicity we can just call it basalt). To see columnar jointing in rhyolite, go to the Owen's River gorge. It is located South of Mammoth, North of Bishop. The entire landscape is comprised of Bishop tuff.

@edwardlulofs444

2 жыл бұрын

@@BrettVarve Thank you. I expect to be in the area this spring, summer 2022 and I'll look for it.

This is the first that I have heard of rhyolite hexagonal columns, only basalt hexagonal columns.

@Dragrath1

2 жыл бұрын

From Nick Zentner I had heard of andesite hexagonal columns too but this is the first I have heard of rhyolite hexagonal columns. This seems to suggest that this pattern of crystallization is more general to at least partly silicate magma/lava cooling. Presumably dacite could also make these with the right conditions at least not sure about some of the more exotic magma compositions like trachyte or phonolite however.

@edwardlulofs444

2 жыл бұрын

@@Dragrath1 Thank you for this thoughtful and informed reply. BTW, I've retired and haven't been on campus for several years. I hope everything is going well.

Can you explain Staffa in Scotland?

Recently HK and nearby areas are experiencing jolts. Magnitudes are higher each round. Possible the Magma chamber is recharging again and lifting upward that caused the recent quakes!

Interesting, as I always suspected that the city I once lived in was once a volcano as the clues where everywhere, if you knew what to look for. I had suspeccions since 1993/1994 when I first saw the clues written in the rock of the outlying islands.

What volcano was shown at 1:25? I’m curious cause it looks interesting!

@ocathain-games

2 жыл бұрын

Wait i found it! Mount Rinjani!

Really, didn't know that. Praying for all the innocent people there. God bless you all 🧡🇨🇱

Iceland has a huge area of hexagonal columns.

Those columns looked like the ones in sugarite state park New Mexico

Been to sai kung and noticed the many hexagonal columns. I suspected it was formed by volcanoes and now this proves it.

Long have I wondered since the weakening is ongoing, where is the next massive volcano?

fun fact, there's a Geological nature reserve in Hong Kong called Horse Poop Island. I've been there as a kid, and it isn't particularly interesting beside the name

Is this volcanic system still active? Is there still a magma chamber beneath Hong Kong?

@hoosinhan

2 жыл бұрын

Currently Hongkong is far from any plate margin. The nearest one in IndoChina-China, are considered inactive. There should be no liquid magmas in any of the ancient chambers below HK. Their suppy were long gone.

@cacogenicist

2 жыл бұрын

Definitely not. But I believe granite crops out in the area quite a bit -- possibly remnants of the old magma chamber.

Learned something about one of my favorite ole hangouts I can't visit anymore, ...BECAUSE OF RECENT POLITICS WITH BEIJING. DAMN!!!!!!!!!!!!!!!!!!!!!!!!!

I've been to Hongkong 4 years ago but I didn't realize there was a supervolcano😂.

Why is the same volcano also shown in Yellowstone usa

🌋Hi there. Great video! How does the volcanic ash create these hexagon shapes. And why doesn't volc.ash create hexagon shaped columns every time it falls? Is this to do with silica?🌋✌️ Sorry I should a kept watching. Question answered

What is the future for this vulcano?

Subtitulado en español es por estilo propio

👍

What I don't get is this. Everyone is worried about Yellowstone supervolcano but if that thing explodes then it can cause other super volcanos to explode too. The earthquakes that would be felt all over the world would cause so many valcanos to explode and the ash and debry would cause another ice age.

Where's Hon Kon?

HONG KONG… PHOOEY! The whole damn planet’s a caldera😮.

No gemms ? :(

Stay safe 🙏🙏🙏

And there is a new #nuclearplant is located near the city!

Admiral's need these people do admiral's eruptions to USA Canada sides this u also must do admiral's eruptions

Any Supervolcanoes in Philippines?

@Sphynx93rkn

2 жыл бұрын

There is Taal.

@tinkhamm7251

2 жыл бұрын

I bet there is

@tinkhamm7251

2 жыл бұрын

@@vesuviussoloshumans thanks Alex, I vacation there a lot and love Phils

@tinkhamm7251

2 жыл бұрын

Supervolcano in definition is a 7VEI or higher, nope sorry Alex, has never accurred there

@heyho4770

2 жыл бұрын

@@vesuviussoloshumans But still at least capable of very big eruptions. Watch the video from Geology hub about it. There have been 4 Caldera forming eruptions in ~150000 years

Taiwan mud volcano?

Volcanoes are made out of rocks.

This just kidding guys

And then the British came

No such thing as an EXTINCT caldera.

🕎🐆 ZIZTER GABRIELLA 🐆🕎 HERE 🐾 I'M 68, PLEZ-Z-Z INCLUDE "👑 IMPERIAL MEASUREMENTS 👑", FER ELDER PEOPLE LIKE ME WHO DO NOT VISUALIZE IN 🙀 METRIC MEASUREMENTS 🙀❗❗❗

Yeah? So what? Just another video intended to make money?

That's not good

@pixeldubsofficial

2 жыл бұрын

It's extinct bruh

@cyankirkpatrick5194

2 жыл бұрын

@@pixeldubsofficial okay

Hope it.awakens.