A video on Komatiite what conditions make it unique would be nice ? I've not heard of this before until this video.
@andreasmanique113 Жыл бұрын
kzbin.info/www/bejne/e2m8lnqvaqaebs0
@Dragrath1 Жыл бұрын
He did a video on this topic already kzbin.info/www/bejne/e2m8lnqvaqaebs0 Basically the lava was a hotter cousin to basalt incorporating minerals that have already cooled and crystalized out of basaltic melts which was possible back when Earth's interior was hotter than it is today. The youngest example of this kind of lava was related to hotspot volcanism in Africa some 90 million years ago if I remember correctly.
@lorrinbarth1969 Жыл бұрын
I agree, Komatiite is a high temperature lava. As I understand it, the unlikelihood of a Komatiite eruption today is due to a cooler mantle.
@zGJungle Жыл бұрын
@@Dragrath1 thank you
@markharder3676 Жыл бұрын
If I recall correctly, komatiite is a lava that originated in the mantle of the earth with ultramafic minerals like olivine and pyroxene in it. Compared with basalt, komatiite has a high melting temperature, higher than those produced in the shallow mantle today, because Earth was hotter than it is today and the more recent geological eras. So, komatiites will not form in today's volcanic events, an exception to the general pattern in which geological processes we see today also took place throughout Earth's history. I think they're one of the more interesting phenomena of geology, and one of the reasons I like studying the field as an amateur.
@nothanks3236 Жыл бұрын
Ok so before watching I'm going to predict: it has something to do with ice age processes, glaciation. Edit: Yep I was wrong.
@xiphosura413 Жыл бұрын
The glaciation is what put the lakes there, but why the lakes ended up where they did is due to the underlying geology. So in a way, both are correct assertions.
@conradnelson5283 Жыл бұрын
That’s what I thought
@johnpembroke9869 Жыл бұрын
Egyptologist say they were dug out using stone tools and ramps.
@Eyes_Open Жыл бұрын
@@johnpembroke9869 There is a reason why Egyptologists talk about certain tools in ancient Egypt.
@johnpembroke9869 Жыл бұрын
@@Eyes_Open what reason would that be?
@cbl1199 Жыл бұрын
There is also the fact that due to the last ice age melting, which because of the thickness of the ice crust (Iirc, as an exemple, there was about 2 km of ice over the Laurentides, the region I live in in Eastern Canada, and is now way below the modern arctic region), resulted in incredible amount of erosion due to the displacement of surface water. So by the time the flow hit the ground, it was so strong that it effectively carved into the bedrock and swept away huge multi-tons boulders like they were pebbles (you can still find to this day huge smoothed boulders in the middle of forests, or just below the surface, right in the middle of forests or elevated area that obviously never were river bottoms), causing the formation of fjords all over the land, as many of the rivers that cover the area have a form reminiscing of more evident jfords like those found in the Scandinavian peninsula (if you were to take a cross section, it would be shaped like a T, where the shores are shallow but the middle has great depth which hide a great flow of water, which make them especially dangerous to swim in if unprepared). Even a simple walk in the forest can show you parts of the bedrock still visible, as the accumulation of biological matter has yet to recover the land in dirt in many places. I wouldn't be surprised that the difference in height between the Canadian shield and the western mountain ranges funeled the flow, with the areas now known as the great lakes to be the result of interaction with water soluble rocks and the aforementioned ice age melting water flows, creating pockets of water whereever the flow was throttled due to the local bedrock composition. As an end note, I'd really like to hear you speak of the odd geological formation found within the Hudson Bay, the Nastapoka arc, as its almost perfectly circular shape always piqued my curiosity, and has been a source of debate among geologist for ages. Its as if something just took a planet sized cookie cutter and stripped away a whole chunk of the landmass, with despite its shape insinuating its origin to be an impact crater, geological analysis found no shatter cones or melted rocks whatsover. I'd like to hear your take on the matter.
@ssansu Жыл бұрын
He did a video on the Nastapoka arc.
@cbl1199 Жыл бұрын
@@ssansu My bad, thanks for the heads up!
@cbl1199 Жыл бұрын
@@ssansu My bad, thanks for the heads up!
@hamletksquid2702 Жыл бұрын
The parts of Ontario I've lived in were almost all composed of glacial debris with no discernible pattern to it. I grew up on the Oak Ridge moraine and now live on the bottom of a former glacial lake just south of the edge of the Shield. There are escarpments from sea shores when the land was depressed under the ice, and we get the occasional earthquake because the land's still rebounding. We're basically the dump where the glacier dropped everything it scraped off the Shield.
@gingerlyglasses444 Жыл бұрын
I'm on the bruce peninsula which is on lake Huron. Behind my old house there's a massive granit Boulder that was in the shape of a ball and taller than me. In that area there's like 30-60 centimeters of top soil and that's it
@MonkeyspankO Жыл бұрын
The geology of Canada, and the shield specifically, is fascinating. Both for the features it does and does not have. Guess the great ice sheet is still making waves (pun intended). Would love more content like this about my neck of the woods.
@GeologyHub Жыл бұрын
Also, due to the uniformly old age of the majority of the Canadian Shield, it has mineral deposits which could best be described as unusual due to the hotter mantle at the time they formed.
@рената_цехановецкая11 ай бұрын
it really is ! I've had the pleasure of visiting a national park in Ontario Called Beausoleil Island, which is located right on the edge of the shield, with a very clear transition, and it's so interesting to see. Many of the best hiking experiences i've ever had were on sheild terrain !
@thezood Жыл бұрын
Check out Lake Vättern in Sweden. It's a deep, narrow lake that was formed as a grabben along the Protogine zone. The geological map along this zone is really interesting.
@composthis Жыл бұрын
It's cool to see a video about these types of larger, continent-scale geologic features and forces and their geologic histories. Would love to see more videos covering larger features and their changes over geologic time, like the Wester Interior Seaway or the Tethys ocean, or the assembling of western North America. You condense complex topics down so well into small bites. Thanks for your great work.
@Backroad_Junkie Жыл бұрын
Not to shade GeologyHub, but there's a 3 part Nova called, "Making North America", hosted by Kirk Johnson. It does an excellent job of describing the major events on how North America was formed (geologically and inhabitation) in less than three hours. I was very impressed with that series...
@AtarahDerek Жыл бұрын
Straight line? I always thought it looked more like the distinctive arc one would expect at the edge of an ice sheet.
@gordonrichardson2972 Жыл бұрын
The type of lava at 3:32 is pronounced Komati-ite, named after the region it was first identified in South Africa.
@stevejohnson3357 Жыл бұрын
Until about age 9 I lives in Kenora at the northern end of lake of the Woods. There is farming to the west in Manitoba but right there it's bare rock, small trees and muskeg. No farming but a great area for picking wild berries.
@jrv128 Жыл бұрын
Lake of the Woods is another good example of this lake type
@highenergyog Жыл бұрын
I live along Lake Ontario and I’ve been to Great Slave Lake as well as Great Bear Lake , I have been subscribed for a while and I always look forward to seeing your next upload. Best regards as always from Lloyd somewhere here in southern Ontario Canada 🇨🇦.
@Foxxorz Жыл бұрын
Nice to see the Canadian great lakes get some recognition.
@huttboynz4422 Жыл бұрын
Flying from Ireland to NZ on my return trips to catch up with family etc. I’m often amazed at the share size of Hudson Bay when flying over. Some Bay!!
@leechjim8023 Жыл бұрын
Watch out, you,r flying over Russia. They are murderers!
@dennisenright7725 Жыл бұрын
Eight million square kilometers of some of the oldest and hardest rock on the face of the earth. Scraped clean of topsoil by repeated glaciations. Cape Cod and Long Island as well as the highest points of a half dozen midwestern states are apparently the terminal moraine that glaciers scraped off the region
@jakedemedeiros9978 Жыл бұрын
Big fan of the work you put out, I never miss an episode Canadian geology is fascinating, I was wondering if you could do a video on glacial erratics, particularly the abnormally large glacial erratic I grew up nearby to called “The Big Rock” in Okotoks, Alberta Also, and this isn’t a problem just so you know for the future, Winnipeg is pronounced “win-uh-peg” not “whinnie-peg” Cheers, keep it up!! 👍👍
@countrykids6483 Жыл бұрын
The "Whinnie-peg Jeets"
@ssansu Жыл бұрын
I thought it was pronounced "winter-pig" 😉 Just kidding. Winnipeg is a nice city even if it is a tad chilly in the winter.
@denisenilsson1366 Жыл бұрын
@@countrykids6483 🤣🤣🤣
@SunsetLynxx Жыл бұрын
Winnipeg is the cesspool of Manitoba. Always hated going there lol
@hamletksquid2702 Жыл бұрын
@@SunsetLynxx - I've been around it, but never in it. Hitchhiking in the 70's, that was like the gateway to civilization when going East. After days of flat nothing with pickups swerving onto the shoulder to scare you and beer bottles flying out of car windows at you, you pass Winnipeg, and the trees start and the wind ends.
@gosselinkfinecarpentry9786 Жыл бұрын
I was literally googling the largest lakes in the world last night and saw many in canada. As a new resident to canada I wondered why there were so many. Thank you. Now how about a video on nittilling lake? I enjoy these geologic videos as much or more than the videos on volcanoes.
@MG-cu6ny Жыл бұрын
Love the Canadian shield. So much to look at with all the rocks. And you can find nice crystals in the veins.
@saukhaven Жыл бұрын
I would enjoy hearing more about what created the craton itself. Thanks for such great videos and Happy New Years!
@earthknight60 Жыл бұрын
The lakes also occur because the vast continental glaciers scoured the Canadian shield down the the bedrock and then dug down even deeper into the softer terrain just off the edge of the Canadian shield.
@ticksunbs4944 Жыл бұрын
I saw a vid about the ‘NA’s forgotten great lakes’ some weeks ago thanks for the follow up
@beyerdr Жыл бұрын
I would love to hear more about Komalite and why it can no longer erupt on earth. That sounds fascinating!
@coolnewpants Жыл бұрын
So why do cratons tend to be smooth rather than jagged?
@Blaqjaqshellaq Жыл бұрын
Parts of the Canadian Shield are in the USA, including Michigan's Upper Peninsula and the Adirondack Mountains.
@gigibluestockings5168 Жыл бұрын
I've heard of the Canadian Sheild but I've never known what or where it is. Thank you for that knowledge.
@thecryingshame Жыл бұрын
I'd love to see a video on the unconformity in SE Ontario & Western Quebec. Keep up the great work!
@Me3stR Жыл бұрын
I thought before the most recent Ice Age, the Missouri River emptied into the Hudson Bay in an Amazon-esque fashion. But the Glaciers advanced, and redirected the waters towards the Mississippi and Mackenzie. My understanding was those Lakes were remnants of the vast river system that existed so long ago.
@georgechord5376 Жыл бұрын
Thanks for this post. I have been fasinated by this area - the Canadian Shield - and these lakes for years. I knew they were in a line but never made the connection.
@stevespyderАй бұрын
Finally a video that talks about Bear and Slave lakes. These are part of the rift that is slowly forming as Canada is slowly being pulled apart by tectonic action.
@jasonstinson1767 Жыл бұрын
Mr Hub, Could you please explain the formation on flint (in chalk) and chert (limestone)? Sincerely , Jason, a Knapper in Kentucky
@rexstuff4655 Жыл бұрын
Concise and to the point. I wish many more YT videos were like this.
@DennisCambly Жыл бұрын
As a note the Great Lakes are connected to each other. The water flows from northern and northwestern Ontario into Lake Superior down the other lakes to the Atlantic Ocean. The other lakes you mention in western Canada flow to the Arctic Ocean.
@bukboefidun9096 Жыл бұрын
Fascinating! Good stuff GH
@AmazingPhilippines1 Жыл бұрын
I make a trip with a friend to Winnipeg and Winnipeg Lake decades ago. My friend, a French major in college, wanted to practice his French in that area of the city. Interesting geology in the area.
@iciajay6891 Жыл бұрын
I live on the shield. In something called 'The escartment'. Were ancient mountains are worn down to large hills. I can see it every direction in my small but sprawling city. My sister moved to BC. I could not handle the stress of earthquakes so i wil stay on the shield thnx. XD
@seanrodgers18395 ай бұрын
In high school geography, I once ask the teacher why were these lakes were in a line. He didn't have an answer, but I knew there must be one. I had figured this was the reason, but it's nice to have it confirmed.
@paul6925 Жыл бұрын
I grew up right on that line north of Kingston by Lake Ontario. It was really obvious - abruptly going from cottage country exposed granite to limestone farmland whenever we travelled into town. There was a small ski hill right on the line because of the huge change in elevation.
@thesilentone4024 Жыл бұрын
Can you do a video on all the active volcanos that are venting gas and how much gas there letting out mybe let us know what kinds of gas if tells you.
@filonin2 Жыл бұрын
Humans emit 60x more co2 than volcanoes per year, so not much.
@djblackprincecdn Жыл бұрын
A video on the how and why the ground is rebounding around Hudsons Bay would be great.
@jonathanellsworth21 Жыл бұрын
So I see you left Minnesota’s Arrowhead and Mesabi regions out of the Canadian Shield, does the international border actually follow the edge of the craton, with NE MN geologically different? Or was it omitted just for simplicity?
@erikzered7945 Жыл бұрын
No he just left out the parts of the shield not in Canada, Which also includes the Adirondacks in New York btw.
@user-gi3oc1kv5m Жыл бұрын
I saw a video of yours one night while surfing youtube for content to soothe me to sleep. Your voice and how you break down the information hooked me to subscribe. While a lot of the things mentioned I have no idea about - and I rewatch them several times to wrap my head around them - it's still exciting and intriguing to learn about, and I've always enjoyed learning about Geology. I appreciate your time and the content you put together. I look forward to your future videos! Thank you!
@GeologyHub Жыл бұрын
I am glad that you enjoyed my content. Thank you for your support :). Do you have any geology topics that you want to request?
@brian8410 Жыл бұрын
Telling someone that they are a cure for insomnia can sometimes be taken the wrong way.
@user-gi3oc1kv5m Жыл бұрын
@@brian8410 hmm, I wasn’t aware in my comment that I said they cured my insomnia… It started off as a night I needed help sleeping and it turned out to be a wonderful find, so now I actually watch these videos to learn instead of helping me sleep. Happy learning, take care :)
@fantomfang1100 Жыл бұрын
Can you cover the Wallupa gap feature in Washington? Love your videos!
@Misterwhistle Жыл бұрын
I live in northern Saskatchewan Canada. It is bedrock and part of the Canadian Shield as you call it. This is the first time I have heard the term Canadian Shield and have always known it as the Precambrian Shield. Have I been wrong all this time or are they one in the same?
@andrewclayton4181 Жыл бұрын
I heard the term Canadian shield decades ago. Maybe it's more common outside of Canada.
@gordonrichardson2972 Жыл бұрын
Precambrian is an age term (> 600 Mya), and many Shields/Cratons are similarly ancient. Canadian Shield is location specific.
@erikzered7945 Жыл бұрын
As an Ontarian I've known the term for most of my life but usually just call it the shield anyways. Your case is probably just what the locals call it rather than the scientific term
@filonin2 Жыл бұрын
Same reason French Fries aren't called that in France.
@ColePenner Жыл бұрын
Grew up in ‘Berta and we are taught that it was called the Canadian Shield in our textbooks
@scottj4641 Жыл бұрын
I feel I learned a number of things from this video, including why the lakes formed along the shield's boundary, but not why in a straight line rather than in an arc.
@derrickstorm6976 Жыл бұрын
I binged some older videos that were almost-volcano related history just like this, and were hoping for more to come :D
@Backroad_Junkie Жыл бұрын
Actually, this may explain why all the border lakes around the Minnesota Arrowhead all seem to run East-West. (They were the border routes for the fur trapping trade...) I've canoed a few in the Boundary Waters... Can you explain why all these border lakes run East-West? Was it cracking around the edges of the Canadian Shield?
@BackYardScience2000 Жыл бұрын
Now I'm extremely curious, I'd like to suggest that we need a video on this lava that can no longer erupt on earth. If you don't already have one posted to KZbin, that is. If you've already made one, if I find it I'll share it as a reply to my comment. I'm pretty busy, so if someone beats me to it, then by all means. Lol 🙂
@BackYardScience2000 Жыл бұрын
Found it. Can't believe I never saw this.... kzbin.info/www/bejne/e2m8lnqvaqaebs0
@Dragrath1 Жыл бұрын
He did a video on it before kzbin.info/www/bejne/e2m8lnqvaqaebs0 It was a higher temperature lava type than basalt as in contained stuff that has already precipitated out of basalt. The most fascinating thing about it is its low viscosity which made it flow more like water than modern lavas
@iver7473 Жыл бұрын
really interesting! thank you
@NocturneSMT3 Жыл бұрын
Please make a >10 minute video on the cascadia subduction zone.
@kevinbyrne4538 Жыл бұрын
I'd never wondered about this; nevertheless, I did find it interesting. Is the "Canadian shield" also called "Laurentia" on some maps of plate tectonics?
@jeffclarkofclarklesparkle3103 Жыл бұрын
I live near the canadian shield border and found a crystal in the middle of a rock that both have some pretty cool features. A geophysisist (not sure how to spell that my bad) looked at it and said it is called an Augen Gniess and formed about 1.5 billion years ago by sheer tectonics movement. The crystal inside the middle can be almost any hard crystal. I beleive it is a feldspar type but it's hard to tell. But it has rainbow shiller effect lines, which i found spectacular, otherwise the crystal looks like a dull greyish colour. I tried extracting the crystal but had no luck as the surrounding rock is very hard and full of different types of crystal much like granite that has been fused together to be even harder. Augen is the german word for eye, because the feldspar on the outer portions of rock have been melted slightly and stretched giving them the look of a half closed human eye. 😁💖 i love canadian geology
@leechjim8023 Жыл бұрын
Good enough!🙂
@roosjen Жыл бұрын
I loved this and would love to learn more from you about cratons. I visited Karijini National Park in Australia and stood on a rock surface that was over 2 billion years old. Beautiful surroundings there, and great experience. I believe the park is part of the Vaalbara craton. Not sure about the name, but the other half of it is stuck in South Africa. I bet you know the one I mean 😅 Thanks for all your great content!
@SunsetLynxx Жыл бұрын
I like it when my country get mentioned. I learn so much! But now I must know more about Komatiites please!
@jrv128 Жыл бұрын
Lake Athabasca is on 2 significant unconformities. The unconformity of the crystalline basement rocks of more typical Canadian Shield on the north shore and the 1.5 billion unmetamorphosed sandstone of the Athabasca Basin. Also the unconformity of the shield and the Western Interior Seaway sediments. You can see the sand dunes from the erosion of the sandstone on the south shore of Lake Athabasca. They are the northern most active sand dunes. The Athabasca Basin is by far my favourite part of the shield, it is unique for many reasons.
@zilvoxidgod Жыл бұрын
very cool video!
@fimbulsummer Жыл бұрын
I really want to know about Komatiite now!
@Nemodog Жыл бұрын
Please do a video on komatiite. I've never heard of this and I'm very interested! Why aren't circumstances on earth allowing for this kind of lava flow at this time? Really hope you follow up on this! Thanks! Love your videos and watch every one!
@xoxo2008oxox Жыл бұрын
We used to joke that the shape of the Canadian shield is the same spot where the moon left from the Earth... if you are one for that theory....
@grokeffer6226 Жыл бұрын
Interesting observations.
@michigannative2951 Жыл бұрын
Neat summary. Have a question do you think that the radius of the graphic you used could be a foot print from a meteor strike. The sudden shock could have melted ice rock and there’s recently been a miner in Canada? I think that’s been finding mastodon tusks and bones, not the point but it could explain it better why the animals herd and and ultimately died. They say the Great Lakes formed as result of volcanic tubes being crushed by glacier’s forming over the top and eventually collapsed and they filled in with water. Might explain the copper and gold found.
@mengatur Жыл бұрын
Please discuss about gede-pangrango stratovolcano its contain 2 caldera maybe it have vei 6-7 eruption
@BriansAdventuresAndGaming Жыл бұрын
I think a good topic for a future video would be about the US Great Lakes. I was watching something one time where it said I think Superior has basalt in it which means there has been some lava present in there at one time.
@Dragrath1 Жыл бұрын
Yeah the great lakes of North America are ancient rift lakes associated with an extensive failed Mesoproterozoic rift complex. They had for most of the planets history become filled in by sedimentation and eventually sedimentary rocks but during the Pleistocene they were once again excavated by glaciers as the less resistant sedimentary rock layers were carved away.
@Backroad_Junkie Жыл бұрын
Look up the "Mid Continental Rift in North America." Apparently, it was so large (It extended all the way into Kansas) it almost ripped (what was to become) North American in two. If @Geologyhub hasn't done a video on it, he should...
@BCRandom69 Жыл бұрын
I'd like to request a video on Mount Garabaldi and "The Barrier" in Southwestern British Columbia near the town of Squamish
@OMGitshimitis Жыл бұрын
My guess before seeing this. Something to do with the time the American tectonic plate tried to rift.
@sofiav4353 Жыл бұрын
Would love to hear more about the Canadian Shield. I live in southern Ontario, and often find tonnes of tiny seashells and coral fossils in driveway gravel that has been sourced locally. I wonder how old they are. I've also heard that it is very hard to find any other "big" fossils because of this.
@alexilonopoulos3165 Жыл бұрын
Wow, this is something I’ve actually always wondered about! Great video!
@Slothery Жыл бұрын
Wow that was so we'll described in such an easy way to understand. Fascinating stuff!
@mfreel1657 Жыл бұрын
Thank you for answering that question. I notice the line as well and wondered about it many times. One less shower thought.
@62Cristoforo Жыл бұрын
For years I’ve wondered about this very thing. And then this video appears.
@Rancid-Jane Жыл бұрын
Thank you. I have always wanted to know why.
@chasemclain6235 Жыл бұрын
Can you go into detail of why some lavas can’t erupt anymore?
@Deeplycloseted435 Жыл бұрын
There is some cool geology in the upper midwest from glaciers. If you guys like this kind of stuff, search for geologic points of interest near where you live. There is always something that will surprise you. Email a professor nearby, and I bet they could give the best list. Then get outside, see some geology, and enjoy the world. You don’t have to go to school forever to be an enthusiast in ANY science field.
@Thanksabunch Жыл бұрын
Thanks! Really enjoyed this one!
@Nightscape_ Жыл бұрын
I didn't even know these lakes existed and I live in North America! I want to know about the formation of cratons now.
@jackjones9460 Жыл бұрын
I understood you saying Cratons had generally straight edges but I don’t see how that explains the Canadian and US Great Lakes existence. I’ve often wondered if the land east and west of the lakes pulled apart creating the deep cavities the lakes seem to be covering. Can you tell us what processes most likely formed the lakes as opposed to my guess? I appreciate you making the videos. I have in fact wondered how all the Great Lakes formed but never had an opportunity to ask anyone before. Thank you!
@herenowjal Жыл бұрын
The elephant in the room (and seldom discussed) are the periodic pole shifts that occur throughout earth history. It’s been suggested that a previous pole shift (concurrent with a earth crustal displacement) moved Hudson Bay from its position as the former North Pole, to its present location. This accounts for it being the center of the Laurentide Ice Sheet during the Last Glacial Maximum (LGM). Would this account for massive ice coverage over North America - as compared to ice coverage in Eastern Asia ?
@zaynecaspersen4455 Жыл бұрын
On the Canadian Shield, in the province of Quebec, the west side in the Hudson Bay looks like an extremely large crater, which I know isn't quite the case, but why does the area have such a round looking edge to it
@joshhancock3163 Жыл бұрын
Can you do a video on the Oregon coast range? It seems like I've heard it has some volcanic origin but not entirely sure
@charonsiouxsie949 Жыл бұрын
His is bloody fascinating
@sylver369 Жыл бұрын
Lakes and ponds occur along rivers, streams and brooks in lowland areas. They are not really in a straight line, they are close enough together you could draw a line through them though.
@DaFlyingFox Жыл бұрын
Very interesting topic, thanks.
@rogerdudra178 Жыл бұрын
Greetings from the BIG SKY. Most interestings, thanks.
@diskdrive123 Жыл бұрын
I haven't looked it up; but I'm guessing those other lakes aren't very deep and in general more narrow/stringy, so by sheer water capacity they probably don't even compare.
@ElBantosClips Жыл бұрын
Why does Canada, Alaska and even some areas in Russia all have what seem to be thousands of small lakes all running the same sort of direction? Are they ancient markings of ice sheets? Or just simple tectonics?
@TheDanEdwards Жыл бұрын
Ice.
@SailorGreenTea Жыл бұрын
1:40, time for a change.
@KhaoticDeterminism Жыл бұрын
Thanks! I always wondered this
@dainisozols1213 Жыл бұрын
Lake depressions are made by glacial erosion where softer bedrock occur. Baltic Sea is very similar to Great lakes and is made mainly by glacial (and glaciofluvial) erosion.
@SB-qm5wg Жыл бұрын
The rift-lines under Lake Ontario are pretty cool. Not part of the failed rift of Lake Superior. No one knows why they are there.
@allixkirchhoff7857 Жыл бұрын
I love the videos! keep it up! i hope maybe more lake videos in the future this was great thank you!
@alecity4877 Жыл бұрын
I'd love a video on the Guiana shield tbh.
@PaulSteMarie Жыл бұрын
I'd be interested in seeing a video on komatiitie why it no longer erupts on Earth.
@sheikchilli8670 Жыл бұрын
considering that the earth is not a perfect sphere and is flattened at the poles, is there evidence of deformation of tectonic plates caused by them moving north/south?
@richardupcott9026 Жыл бұрын
Why is Hudson's Bay in the center of the Shield? As if the Shield is a bowl, high rim but a low center. Also, is James Bay a crater?
@jrv128 Жыл бұрын
Hudson Bay was the most depressed part of where the ice sheet was. It compressed so much that it is below sea level. It is shield underneath all the marine sediments for sure though.
@barbburns21229 ай бұрын
Great information
@riverAmazonNZ Жыл бұрын
Extremely interesting!
@TexasTimeLord Жыл бұрын
It's amazing how the Great Lakes formed right on the border of the US and Canada dividing themselves in half
@leechjim8023 Жыл бұрын
I think you got it backwards!
@crinkly.love-stick Жыл бұрын
Topic idea: how did lake inferior form? It's a giant lake, hidden underneath lake superior.
@CJFreeza Жыл бұрын
Fantastic video
@rorymacintosh6691 Жыл бұрын
Wonderful, thanks!
@gbrown9273 Жыл бұрын
How about the possibility of a fault line causing the lakes to run in a similar line?
@AstonMartin427 Жыл бұрын
GeologyHub, can you do a video outlining the creation of Cape Cod and the islands?