Explore Mysterious Rivers On The Deep Seafloor 

Somehow I got the date of the earthquake in Newfoundland wrong. It was in 1929 not 1936.Many of the channels are not active and haven't been active since the last ice age when sea levels were very low and erosion of the canyons occurred.

Years ago when I first started enjoying the wonders of satellite maps, the underwater canyons off the continental shelf always intrigued me in how they got there. Thank you again for another lesson in geology!

Im no geologist, my schooling was in auditory science yet this channel and video found me and I have to applaud the presentation, the clear passion for the subject and the moments where the viewer is asked to ponder questions they probably don’t know the answer to. All of these are the hallmarks of a master instructor. Thank you sir, for 32 minutes you made me an avid geology enthusiast and that will likely continue beyond this chance meeting. Seems like youtube can be a positive after all!

That discussion about what 1950s geologists would have said was such a great way to bring alive the problems of the proposed explanations and to give perspective into how far modern understanding has developed. Your onscreen feet to metres rubrics are also very appreciated.

Another example of your wonderful teaching style! You draw the viewer along with you gradually explaining the process and how it formed the structures seen in old rocks and still proceeding today. I just love this - you make it all so easy to imagine and understand. Thanks so much for sharing your knowledge with us in a way so interesting and natural to follow.

Best Geology content on RU-vid, well done!

This was the nerdiest geological breakdown video I’ve ever watched. Cut and dry, didn’t try to over hype, or turn into artificially exciting information. Didn’t think I would care for it much, but it was very interesting. Thank you.

You're presenting everything so very eloquently and clearly. I think that I should get educational credits and possibly a RU-vid PHD. Seriously, I may have just learned beyond what you set out to teach. I will take your knowledge and wish to add to it.

Thank you, Myron, these videos are really enjoyable. The drone work is always spectacular as well! Dave J

Turbidites - that's a word I learned from Nick Zetner and Brian Atwater. Even a old goat like me can learn a thing or two! LOL 😂 Edit: those extremely long sea-bed rivers are more than just turbidites. Perhaps a different name for these?

Thank you for blending in the numbers in meters as well! Otherwise many of us would have no idea how deep high or far the distances are. I just think that deserves some appreciation!

I actively follow several geology-related RU-vidrs. I like them all, but Myron is my favorite. Thank you so much for the work you do making these videos Myron. Can’t wait until the next one!

The degree of meandering of some of those Bengal channels is quite remarkable. It's difficult to imagine formation of meandering channels in a submarine environment. It would seem to imply extremely low topographic gradients AND a continuous, slow flow capable of eroding the material upon which it moves. I've always thought, perhaps incorrectly, that turbidites are deposited intermittently. Those meandering channels look like the work of a continuous process. What it suggests to me is very high density (cold), continuous but slow, channelized fluid flow, with limited suspended load. Almost like an immiscible stream. Probably ridiculous. It would be interesting to see if there are cutoff oxbows around these channels. Love and appreciate your work, Myron.

Oh gosh, one more example of the difference between the flat bottomed ocean floor in my very first science books and the present! Thanks so much.

I got excited when I saw the notification for your new video, but had to wait until I got home to watch. I’m always amazed at your enthusiasm and dedication you put into your videos and I thank you very much!

Thank you Myron! Half an hour flew by and I was totally engaged the entire time. You remind me of my favourite geology professors - absolutely brimming with knowledge and passion for geology, and able to hold the attention of those they are relaying the information to the entire time. (Also thank you for including metric)

Woohoo! New Myron Video!

Really enjoying your videos - thanks for your efforts. Currently working on a R&D Navy ship far from any mountains I love. When I return I’ll have your insights and it’ll even be better!

Living on the FL gulf coast, I appreciated seeing the Mississippi alluvial fan highlighted. Thanks for posting! ☆

Great vid, thanks! This is so cool! I have had the chance to see a microcosm of this where I live near a local flood control state park dam called Tuscarora in Pennsylvania. The dam is 80 feet deep and since autumn they've been lowering the level about 30' for breast repairs. The inflow backwater area has the silt plain you'd expect, but the colder inflow continues to follow the original stream path for quite a distance, scouring down to the usual sandy, gravel, rock stream bed. Even the small side streams and rivulets have these carved channels until they converge with the main channel. Im sure there's some differences between this and ocean canyons, but it makes it easier to imagine and understand what a fresh water inflow would do in salt water. It's quite surprising to look 3-6'+ down the straight mud walls of a mini canyon that would have 10-20'+ of water above it and know it's still carving after traveling 600-800' in the relatively slow flowing shallow area.

I’ve been fascinated with these features since google earth first started making seafloor topography available. What’s interesting about this video and the topic in general is that you never really arrived at a ‘mechanism’ or supply for the force needed to move these turbides thousands of miles, in a highly organized fashion. Youve described the results of the mechanism, but not how it functions! I’ve never found the answer, maybe it’s still unknown, but obviously gravity is playing a role. My theory is that chemistry is much more involved. These mass suppliers of dense, fresh water introduce a volume sufficient to overpower the mixing that would naturally occur in a smaller volume. This causes a channel to become trapped under the lighter saltwater, and as the slope continues, the increasing overhead weight and pressure causes this funnel of dissimilar liquid to ‘accelerate’ at an accelerating rate. I think the Greenland feature is the key to this whole puzzle. This is a place on earth where the freshwater supply is very high, and also very evenly distributed (without concentrations on specific valleys). The supply is great enough that we find many tiny sources of freshwater converging at the lowest point and organizing into a funnel. I picture something like two metal surfaces pressing together, with a highly viscous oil between. It hits a certain pressure and accelerates toward the path of least resistance. Just a theory!

17:04 -- The 7.2 earthquake in Newfoundland, Canada (which cut 12 submarine cables) occurred on November 18, 1929. (1929 Grand Banks earthquake)

So much enjoy your program! I find it totally fascinating! Thank you Myron!🙏🏼

Thank you for that,its always a pleasure to listen/watch someone explaining a subject they love. Very best wishes to you&yours

Having taken Nick Zentner's online course on the Juan de Fuca plate and surrounds... really interesting how this all fits together.

Thank you, Myron, always a pleasure being taught by you!

Thanks Myron, for another great video/geology lesson. You make these events easy to understand even though I have difficulty wrapping my brain around the vast amount of time it has taken for the results we see today.

Only a minute in and so far I love the way you narrate this! Just honest, open commentary and discussion. It's refreshing.

Love this! I'm putting you on a list of geology channels my friend needs to check out. This video was great--I learned new things today--always a win for me. Another wonderful day at RU-vid University!

I love your teacher like presentations! the level of detail is so nice to actually not end up with more questions at the end of a 30 minute video!

Thank you Myron. Always exciting when I see a new video from you. So well done.

Thaaaaank you. This is pure gold. U have been wondering for years now, what these channels are. Getting finally a nice answer is literaly gold for me.

Fascinating! I have wondered about these channels for sometime. I couldn’t imagine the sea level being at those depths and couldn’t imagine a mechanical process that could carve them. Thanks much!

As always another interesting topic that I knew nothing about. How amazing Geology has become since the 50's. You present so very well and create great enjoyable videos about it. I sure wish my dad was alive to see these. He was a geophysicist for Phillips Pet and spent much of his career in Wyoming. He would point out a lot of geological features that he learned about as we drove around places.

These are wonderful videos! Thank you for making them Myron.

That explains some of the features I have noticed on the sea floor. This puzzled me greatly since the features looked like land surface erosion features. My mind tried to come up with scenarios that could explain this. This video did a much better job!

I always wondered about these channels round the UK. Thanks for the vid!

Great Stuff, love listening to this guys accent. Thanks for your work, Scotland. UK.

Hey Myron, you rock. Great videos and thank you for posting!

Thanks for this amazing content Myron. I love learning about geology.

What a fascinating topic. Thanks for the video Mr. Myron.

I grew up on the banks of the Lower Mississippi River and I was always amazed at the force of the river. Once I became an adult and learned even more, I stand in awe by the “Father of Waters.” We’ve been able to redirect and push the river in this way and that way, but that’s just temporary. Mother Nature will find a better way to the Gulf.

Found your channel and binged watched every single one of them over a few days! Love the way you teach, you made geology fun to learn. Thanks so much for taking your time and making them Mr. Cook!

As usual, this is the best. Love watching it. Well thought out with nice patience. Thank you.

idk why you are dominating my feed as of late but I am blessed everytime. great work!

Great presentation, well explained! As it happens, just the other day I was watching a video about the dry period of the Mediterranean, and one of the proofs of this theory was the underwater channels. I immediately went sceptic because these channels are everywhere in the ocean floor. The dry Med theory still could be valid but now I know how these channels are formed, and as usual nature is so much more creative than we first think.

Myron, finding your channel is one of the joys of digging through RU-vid. I've been seeking information on the underwater artifacts for 3 to 5 years, starting with the Hudson River canyon near New York City. Myron you are the answer to an informational prayer for the last 3 years. Thank you so much. Obviously subscribed. I will joyously be digging through your playlists for weeks.

As I get older I find these topics WAY more interesting. Subbed - this channel looks like a great ride - thank you!

You always present information in a consumable and enjoyable way. Love watching them and learning, thank you!

Thanks Myron. You have a way of describing geology that always stretches my imagination. There is so much more to be learned.

This was excellent. I've watched all your videos but I especially liked this one! Learned lots of new stuff!

I love your passion and I appreciate how well you are at educating on these things. Look forward to more of these videos in the future!

Wonderful Videos, Thank You.

The photography is breathtaking when you are scaling that hillside. And the scenic beauty is augmented by your excellent explanations. Thanks for making these videos, Myron.

VERY interesting! Thank you for posting Myron, love your content and how you teach!

I am so glad I stumbled upon this video! I love topography maps, and I have often wondered where those channels came from. So thank you! I thoroughly enjoyed this. God bless you!

Learning from you is easy . I enjoy listening and learning to all you talk about . It's a wow for me. But I do love Wyoming. Blessings

Wow. Incredible to know more about what's going on underneath Monterey Bay! Bay Area landscape artist here that loves learning about geology from your channel! Would love to see even more about the state of California!

I used to hate geology back in high school, but you managed to make it fascinating. I really felt like a soil detective, trying to uncover some mystery, and the whole process was so interresting ! Thanks a lot, you won another subscriber !

Thanks for putting all the work into making this video. Very informative!

How did I find this channel only now? TBH, I haven't been massively into geology but this is some refreshingly good quality content for youtube. Hats off to you Myron. You've earned a new sub

May be my favorite Myron episode yet! Really good show!

Absolutely fascinating! Thank you :) I love the level of detail you present. I especially love how you encourage the viewer to come up with their own hypothesis and then, bit by bit, provide the relevant facts.

This is so awesome. I came across these channels a couple of years ago on my own while exploring on Google maps and consulted with a few friends including a geological engineer. We were perplexed by the association of rivers to these features but never something as sophisticated as your explanation. Fascinating!

Wonderful! On that bigger scale it makes me wonder now if it was Turbidites that formed some of the river-like channels on Mars.

Props to the Mr. Rogers of geology to help us laymen understand. Respect.

This is the best channel on RU-vid! Thanks for your efforts Myron.

Another great mystery explained, Myron! Thank you!

Great video. Educational not just about the geology but how it was understood over time, always a winning combination!

So interesting! ❤ Thank you so much!!

Myron, I'm not sure how I found your channel but I'm so glad I did! Geology has never even been on my radar but now that it is, I'm diving in head first. I love hiking the Rockies and you've just shown me a way to enjoy it even more!

Congrats on 100k! Thanks again for such an amazing video, you always help to make things very easy to understand. And Ill never get over the birds eye view you give us with the drones. Seeing that unconformity is so jarring when you get a wider perspective. I could swear I saw it continue a bit on the left end of the screen just before it cut back to you.

I love your work, thank you for making these excellent videos!

Spectacular! Thank you! I had no idea that we had such detailed maps of the seafloor. I found myself wondering about some of the more regular features there, straight lines and such and if these might be anthropogenic in nature.

So glad I clicked on this video. Your passion and knowledge is very apparent, and you are able to create superb presentations. Thanks!

This video showed up in my recommended, and im so happy i have found this channel. You love what you do and so do i, excited to see all the videos on your channel now!

Thanks for the educational content, those landscapes are so cool!

always the highlight of my day to see a new Myron Cook video! thanks!

What an amazing class/instruction on the geology of the sea floor!!! So interesting and easy to follow! Thank you! 🙏🏽🤙🏽

A terrific presentation. Thank you Myron. I'm checking out the sea floor map, right now!

Thank you Myron Cook. Every video is great.

I was thinking about the features off the west coast of USA a few weeks ago while looking at Google maps and was wondering if you had a video on them. Lo and behold you delivered!

That was fascinating. Thank you. I tremendously enjoy these deep dives into geologic processes.

Wow, this video was just pure geological delight. Thank you so much!

Thank you for another interesting video ❤🙏

Fantastic, Thanks Myron really enjoyed your video. 😊

Myron I want to thank you for providing these videos. They are very informative and you do a great job explaining the information.

Fascinating video, Mr. Cook!! Thanks for the great education on marine channels. Even though I earned a masters in biology 40 years ago, I managed to take a few very interesting geology classes and I'm still deeply intrigued by what the geologist discover about this marvelous planet!!

What a coincidence, I was looking at these channels on Google Earth a couple days ago and wondered if you would ever make a video about them. They are truly fascinating features but what I find most exciting about them is that they may help us discover rivers that no longer exist. For example there is speculation that a large river system existed in the western Sahara when that region had a wetter and more temperate climate. On land any such riverbeds have long been buried under the sand but but at the ocean floor these channels still exist. Looking at the USGS map there are multiple canyons cutting into the continental shelf off the coast of Mauritania and one, the Arguin Canyon, extends far out into abyssal plain. Perhaps this is evidence of such an extinct river?

Fascinating…eye-opening. Thanks, Myron! 👍

Wow, very educational and interesting! Thanks for a great video, Myron! Glad my little Geology 101 knowledge could help with my understanding of something!

I can appreciate the time involved to get this data that covers so much observable time. Here's why... I know where rocks float on sand in the scrublands between Moses Lake and Ephrata Washington State and I think I know why. Thousands of years of sand buildup at about 1 inch per ten years. The rocks are still on the surface of the sand. The sand has been building up since the end of the last ice age about 10 to 12 thousand years ago when the ice dam in Idaho broke and flooded eastern Washington. Freezing and heating, wet and dry, the rocks have scooched themselves up in tiny fractions of movement as if treading water. I found them while searching for a meteorite that I saw fall all the way to the ground there almost 50 years ago. I'm not surprised that it has never been researched or reported as I've had fifty years to observe these same rock and boulders, some as big as cars and houses on deep sand, floating at the surface of the sand. Any thoughts...? You seem better educated to report on this than I am so you're welcome to check it out. I claim no discovery to stop anyone from working on it, but I wouldn't mind helping to examine the "floating rocks of the scrublands". Don't go in late summer. Not just hot, rattlesnakes.

Another fantastic presentation Myron. Any chance of adding the link to the sea floor images?

So fascinating! Myron videos are always such a treat, so well taught

I always wondered about those formations( like the Hudson Canyon). My Questions have been answered! Well done !!

Myron, I am having trouble finding the link to the USGS (?) or such site that has some of the clear detail ocean floor mapping you mentioned. Am I just not seeing it ? Another killer video!!! You are a great educator and instigate exploratory thinking.

I appreciate it very much that you mark the length in the metric system as well. This makes it much better to follow the explanation. Thank you

Thank you Myron. Very enjoyable and informative video.

man how have I not seen this channel before what a gem thank you for your videos

This channel is so nice. You learn interesting things and you're doing so from such a friendly folk with a very nice accent and smooth voice. It's so relaxing!