Europe's Largest Impact Crater; The Siljan Ring in Sweden

[@azegoroth]

Swede here, The lakes and area of the crater is quite beautiful. I recommend a visit if you're in the area. Historically there have been several mines in the area where Copper, silver, and iron were extracted.

[@dannesundberg4076]

utanför siljanringen . inte i siluren . mest kalksten där samt sandsten

[@GeologyHub]

I was about to mention the silver, lead, and zinc mining as they appear to be related to the impact crater's formation, but I cut it out of the script for time. I do plan to visit Norway, Finland, and Sweden all in a group at some point in the future :).

[@Paramart]

As @dannysunberg4079 says you will mostly find limestone and sandstone within the crater. There are some old mines on the western rim of the crater, but I'm not sure what was mined there. The city of Falun about 65lm south from the impact is famous for it's copper however.

[@dannesundberg4076]

its in orsa rättvik mining limestone. orsa also mining sandston for grinding weels. i have workt 9 years in thise region as a driller for water. and not found enny real interesting . bur yes outside of cilurring ther is a comleat diferent. @@Paramart

[@StuffandThings_]

Another interesting thing to note is that many of the tree species at the time were notable for their shallow roots and propensity to fall over (especially the arborescent lycopsids, which were still smallish at the time but would reach truly massive sizes during the Carboniferous). The general region of Euramerica was also known to have quite a decent amount of fossil forests, which may very well have originated on the slopes of the young Appalachians and spread outward from there. So, not only was it quite likely that a lot of early forests were directly in the line of fire for this event, but the radius for toppling trees over probably would have been a bit larger since they were easier to topple. Must have been quite the sight, vast swaths of swampy land littered with the trunks of the very weird looking Devonian trees throughout the continent.

[@icollectstories5702]

If there were cats back then, they would have pushed all the trees over for fun. Fortunately, cats seem to have never traveled that far back in time.😹😹😹

[@Quinna78]

Im swedish and i had no idea about this impact crater. Thank you for info:)

[@puppybasket3906]

I love how well researched and interesting your videos are!

[@ThatOpalGuy]

the largest lake looks like a cat.

[@jamesfowley4114]

A cat from Chernobyl?

[@asherikamichaela8425]

​@@jamesfowley4114More like a cave painting of a cat.

[@drplague8487]

Looks more like a squirrel

[@williammeek4078]

@@drplague8487definitely a squirrel

[@jjMcCartan9686]

It's a koala bear 😊

[@Levine93]

Would love to see a video about the best ways to define an impact crater from a volcanic caldera or Maar crater’s like when viewing from Google Earth. I know not all caldera’s are perfectly round but some are.

[@Paramart]

I'm watching this video from inside the actual crater :) I hope you can do more videos on this impact, there is not very much information about it online.

[@juliefore]

So, I have some questions. If they are simplistic, I suspect it is that I don’t have a firm grasp of how much or how little is actually known in earth sciences these days. They had just developed plate tectonic theory when I was in school. As someone who is fascinated by volcanoes and other earth processes, but who has little to no math or physics skills, I am curious how you can calculate so precisely the size, speed, and brightness of the asteroids and then the subsequent impacts, i.e. 9.0 earthquake and blast wave strength. I get that you can calculate, based upon the size of the hole, how big an object must be to create it. I suppose that if there are enough topographical features left, you can figure angle of impact. But wouldn’t you need density to calculate speed? Or is this something that can be extrapolated? Have there been enough studies of the types of rock and fossils around those impact craters to determine what was living in the area and what the furthest edge of the impact shock wave was? Are the dates determined with carbon dating? Sorry for the silly questions, I’m trying to bring what looks like magic to my old brain and turn it into science.

[@LadyAnuB]

All good questions

[@luneowvttzTV]

Hi, im from new zealand and I am interested in the whakamaru and mangakino calderas, such massive calderas but i cant find a few videos covering these calderas. Would like if u covered it but its all good.

[@jamesjackman4638]

I've actually seen this from a satellite image on a route map when I was flying on Qatar Airways in February 2022. I do tend to look for features in the land similar to this if I am flying on a air plane if I am at the window seat, however as most of my flights have been at night I usually don't see much.

[@brentvanlith5105]

Another great video. Thank you!

[@Vesuviusisking]

What’s your favourite and least favourite Italian volcano

[@TheSpaceEnthusiast-vl6wx]

Thanks! The impact structure is quite large! We all know this, but when the Siljan Ring formed, Pangea was in the process of being formed. West of the Siljan ring would have been parts of the Caledonian mountain range.

[@Trasselkalle]

Aside from the usual interesting content, kudos for doing so well with the prononciation also!

[@dc7370]

excellent

[@WilliamRWarrenJr]

Here I am, almost 70, and we're on the very edge of such discoveries ... "Ve get too soon oldt und too late schmardt." (Tlinghan q'ol vi jatl laQ bé)

[@MsTyrie]

I've been wondering what difference a meteor's physical composition (aggregate vs metal) might have on its impact metrics. If we touch down on Apophis and find it to be mainly metal, should we be more worried or perhaps not as worried in such circumstances? We might sleep more easily knowing that the devastation won't likely kill all life.

[@icollectstories5702]

I believe metal asteroids formed near the center of planetoids, after heavier materials separated from lighter ones. I would therefore expect metal asteroids to be more solid. Aggregates are rubble piles and more likely to break apart into fragments. Stony asteroids may contain large chunks, however. I wonder if the first thing to do with a meteor is to increase its spin rate and see if that causes it to fall apart. At worst, it will give you clues into its composition.

[@ibeatyoutubecircumventingy6344]

explains the Iron industry in Sweden lol!~

[@elateride]

Iron is mined mainly in Kirunavaara which is roughly 1000 km or 600 miles from Siljan.

[@ibeatyoutubecircumventingy6344]

sorry i was makink jeok @@elateride

[@mistysowards7365]

And another interesting thought, how many huge massive impact craters happened on oceanic crust only to be subducted and all traces completely destroyed? Gotta be most of them considering oceanic crust has covered most of the earth for millions of years.

[@mistysowards7365]

I cant believe any structure from 300 million yrs ago would be visible today. Thats a long time for erosion and tectonics...long time

[@icollectstories5702]

You mostly look to the center of continents, 'cause it's usually the coasts that take more of a beating. Central Australia is very old; the Appalachians and Pennines have been through a lot of erosion. The interesting thing about continental crust is that it "floats" on top of heavier rock. So once it forms, it has a tendency to persist. Oceanic crust is heavier, having less silica, so it tends to subduct underneath continental crust, rather than the reverse. The bottom layer of sedimentary rock exposed in the Grand Canyon is 2 billion years old.

[@stvrob6320]

Lots of examples of geologic structures even older than that. Its not so much a matter of belief.

[@ZombieSlayer-dj3wb]

So were the first 4 extintions volcanic related ?

[@thezood]

Thanks for this interesting video about a part of Sweden that is dear to me and many others. The area around Siljan is really beautiful and historically significant for Sweden, not least for the Vasaloppet ski race. If you look at the area on a geological map the impact feature immediately stands out, you can see how the crust is totally shattered in a circular shape.

[@TheNiklasstromberg]

Not that long from the Siljan ring is another large impact creater where the Dellen lake is. It's messure around 20km wide. A mineral called Dellenite is named after that impact creater.

[@kamildowejko2254]

Will you make video on ongoing EQ swarm at Kilauea's south-west rift zone?

[@chimknee]

Thanks.

[@stvrob6320]

Is this bigger than the Rochechouart impact structure in France?

[@koharumi1]

Wonder what is Asia largest impact crater.

[@chadsimmons6347]

I appeal to your inquisitive nature to decipher geological mysteries & look at Windsor MO

[@Khazard91]

Just realize this could still happen right now...

[@Vesuviusisking]

What’s your favourite and least favourite Italian volcano

[@LadyAnuB]

An asteroid of this size should be detectable with enough lead time to figure out a way to deal with it. Also, how many candidates in the asteroid belt are there of this size are still there?

[@icollectstories5702]

@@LadyAnuB Or it could zoom out of interstellar space.... I don't think it's a technical problem, but could enough people be organized into a group that would do the necessary in time? I have my doubts.

[@alfredhedlund04]

Hello from someone who LIVES in the Siljan ring!😅😄

[@Vesuviusisking]

Please do top 5 easiest volcanoes to climb

[@icollectstories5702]

Mount Tabor in Portland, Oregon, has a paved path that goes up 400 feet. Take your kids. I believe Kilauea is a short walk from the parking lot. I dunno if that counts as a climb. But you can't hike around the rim anymore.

[@outlawbillionairez9780]

What area on Earth's surface has the most known impact craters? What area has the least?

[@b.a.erlebacher1139]

Northern Quebec has quite a few. GH has done videos on several of them. Ditto Australia. To have a lot of impact craters you need old crust, so it's had time to accumulate them, and minimal overlying rock, so you can find them.

[@epzapp]

I wonder what was on the opposite side of the earth at the time of impact.

[@icollectstories5702]

Ocean, as far as I know. I believe anything that was there has been subducted, but it was probably not dry land.

[@KbIMbIFbIMPA]

Puchezh-Katunsky crater near Nizhny Novgorod is bigger - it is 80 km in diameter

[@RSAgility]

The crater was caused by a giant squirrel landing there, I see the outline.

[@itsmetheghost4993]

125x brighter then the sun? Don't forget your sunscreen today! hahaha

[@Hypernerdwithcam]

There is actually gas deposits in the area

[@thomaskielbania6781]

A massive Geyser is more probable!

[@phprofYT]

Please.

[@satanofficial3902]

When a large enough asteroid whacks the planet, what happens to the cooling systems of nuclear reactors and spent fuel pools that whacking is going to affect? Answer...The whacking will cause disruption to the cooling systems of many, many, many hundreds of nuclear reactors and spent fuel pools. And then the REAL disaster begins to begin. The movie Greenland was ludicrous. The REAL ending of the movie... everyone in the shelter dying from uncontrollable diarrhea and vomiting caused by radiation sickness from all the meltdowns. NBC air filters are useless for meltdowns. Radioactive atoms and molecules will go right through the filters along with the air molecules.

[@satanofficial3902]

Although, of course, you could preface your story as events happening in an alternate universe Earth where nuclear reactors don't exist and you can just ignore the whole meltdowns situation.

[@patriciaoudart1508]

Totally false. This is your imagination. I will not longer support your channel. Bye.

[@NothM]

bro 💀💀 en.m.wikipedia.org/wiki/Siljan_Ring

[@Vesuviusisking]

It’s real

[@nox4298]

Schizo moment

[@LadyAnuB]

Bye bye. The rest of us won't miss you 😅