I'm learning so much from you! NEVER knew that Molybdenum was a trace marker for Oxygen content. 🤔 I've used Molybdenum for decades in Bridge Construction, as an alloy to Steel. (Making Steel lighter, stronger and more corrosion resistant!) I never thought about the scientific significance of it. Also, I was told many years ago by a famous paleonbiologist that the "Great Oxygenation Event" (first one), didn't spark mass evolution of life, like the second one because [A] it didn't raise levels high enough ... And [B] most of the Oxygen production was consumed by the abundance of Iron in the Ocean, creating the vast Iron Oxide Deposits that we use today ... Your take on that? (Again, I'm not a Scientist, I was an Engineer with a passion for Paleozoic Biology)
@@GEOGIRL Dr. Lynn, was a beautiful mind... But misunderstood most of her life. She conclusively explained bio-symbiosis (as I'm certain you know). But she FOUGHT most of her life, do get her theories accepted.
The oxygen levels actually overshot modern levels in the early Carboniferous, which you covered elsewhere. I notice that the levels in the Silurian seem to have risen quickly.
Thanks for the sub! And I agree, I feel like the more I learn the more I love the Paleozoic (as well as the Neoproterozoic), what an amazing time for Earth and its evolution!
I just found your channel...it gives me hope for the future of mankind that there very intelligent..talented..and real folks left in the world making videos like yours..thank you..tik tok sux..lol
I love your thorough research, content and interpretation from your historical and well constructed delivery but... I would love it more if you took a deep breath and let the viewer absorb some of these facts for a few seconds so you can absorb the material. It is good but hard work as you continually talk right through each clip without coming up for air. It would make life so much easier with more breathing, ear and thought as we interpret the fabulous content. Cheers.
I think she originally designed her videos to be quick paced to suit the students she teaches who prefer quick narrowly focused hits they can play as either video or just audio and can pause or repeat. The surprising number of non-undergrad listeners have, in my opinion, led to her getting and taking advice such as yours in more recent videos. One of the interesting observations of her audience is the bimodal distribution of kids/students vs others which seem to correlate with different preferences as to pace and duration of watching. Kids seems to target a video until they get the info they need for a test or assignment while other listeners seem to take on the whole session. 😊
My instincts in this area (partly based on established information) is that microbes (especially in the ocean) have much greater effects on oxygen and carbon dioxide balances than larger creatures; that plants are more important than animals; and that oceans are usually more important than land creatures. in particular, I'm skeptical that large land animals were ever directly ecologically significant compared to microbes, plants, and small ocean creatures.
3:56 Where did all the sulfur come from? 13:57 This confuses me, since phytoplankton are the *major* producers of oxygen in the biosphere, and they live in the ocean. Being in the ocean, why didn't _they_ oxygenate the oceans? 17:00 Did the phytoplankton just oxygenate the surface / epipelagic zone? 23:57 O2 levels got up to about 30% around 300-150Mya.
You talk too fast; insufficient time to absorb what you are teaching. Also get a better set of microphones. There is too much reverberation causing dissonance in your words. However, your videos are fantastic in articulating why there were great bursts in evolution over time.
She just needs a microphone that baffles reverb. The echo is the problem. Absent that she might try some acoustic modification of that bare wall behind her. It's a process, like everything.
Random mutation, natural selection is impossible. Sophisticated DNA that is from plants comes from Intelligent Design purposeful origin only. I have no problem with the time and aging you discuss. You are otherwise very knowlegeble.
The Devonian was one of the first things that got me interested in geology! Growing up in NE Ohio there were these huge shale cliffs in walking distance from my home that became famous for their dunkleostus fossils. The discovery of those fossils is actually a major reason why Cleveland today has the conservation funding for it's metroparks (of course, there still are issues with pollution and encroaching development). But I'd sit in awe as a kid staring at those cliffs (img-aws.ehowcdn.com/700x/cdn.onlyinyourstate.com/wp-content/uploads/2019/06/44819465324_6a8b6c57f8_k.jpg) and imagining how deep and massive the river was millions of years ago, and imagine myself standing where a shark or armored fish was once swimming during the Devonian. At the preserve's main building they had a recreation of dunkleostus jaws gaping open that you could walk through to truly understand the size of these armored fish.
That is so cool! Now I want to visit the cliffs and the dunkleostus recreation! Sounds like such a great preservation of Devonian times, thanks for sharing this ;D
not me learning more from you than i ever did obtaining my geology minor. A total queen, keep uploading!
Oh my gosh, this made my day! Thanks so much for the support, I am so glad you find them helpful! :)
I'm learning so much from you! NEVER knew that Molybdenum was a trace marker for Oxygen content. 🤔 I've used Molybdenum for decades in Bridge Construction, as an alloy to Steel. (Making Steel lighter, stronger and more corrosion resistant!)
I never thought about the scientific significance of it.
Also, I was told many years ago by a famous paleonbiologist that the "Great Oxygenation Event" (first one), didn't spark mass evolution of life, like the second one because [A] it didn't raise levels high enough ...
And [B] most of the Oxygen production was consumed by the abundance of Iron in the Ocean, creating the vast Iron Oxide Deposits that we use today ...
Your take on that?
(Again, I'm not a Scientist, I was an Engineer with a passion for Paleozoic Biology)
I completely agree with whoever told you that! Which paleobiologist? I am curious because I idolize a lot of them! ;D
@@GEOGIRL Lynn Margulis. I try not to name drop, but she was awesome!
@@CarminesRCTipsandTricks Oh my gosh she's amazing! You knew her?! That's so cool!
@@GEOGIRL Dr. Lynn, was a beautiful mind...
But misunderstood most of her life.
She conclusively explained bio-symbiosis (as I'm certain you know).
But she FOUGHT most of her life, do get her theories accepted.
Nice breakdown ..you should start a channel..share your brain with the world..God knows we need it
Thanks for these videos. I'm always fascinated by the Cryogenian to Ediacaran to Cambrian times. Quite interesting. 🙂
Love how you pull together current ideas and point out where more work is needed!🐈⬛🐈🐈🐈🐈⬛
Hahaha thank you, and I love how you put cat emojis for Oliver (;
The oxygen levels actually overshot modern levels in the early Carboniferous, which you covered elsewhere. I notice that the levels in the Silurian seem to have risen quickly.
Used to think the Mesozoic was the coolest, but these days I'm more of a Paleozoic pal. Just subscribbled. Cheers.
Thanks for the sub! And I agree, I feel like the more I learn the more I love the Paleozoic (as well as the Neoproterozoic), what an amazing time for Earth and its evolution!
The SPICE extends life. The SPICE expands consciousness.
Excellent video! 🎉😊
My favorite day of the week when you release new video
I ❤️ GEO GIRL
So glad you like them! Thanks for always showing me support, you keep me going! :)
I love your videos. You are my favorite youtuber
Aw, that made my day, thanks so much for the support! :)
Very interesting video! And I just bought the Canfield “Oxygen” book through your Amazon link. So I’m looking forward to learning even more!
I just found your channel...it gives me hope for the future of mankind that there very intelligent..talented..and real folks left in the world making videos like yours..thank you..tik tok sux..lol
Thank you so much! ;D
I love your thorough research, content and interpretation from your historical and well constructed delivery but... I would love it more if you took a deep breath and let the viewer absorb some of these facts for a few seconds so you can absorb the material. It is good but hard work as you continually talk right through each clip without coming up for air. It would make life so much easier with more breathing, ear and thought as we interpret the fabulous content. Cheers.
I think she originally designed her videos to be quick paced to suit the students she teaches who prefer quick narrowly focused hits they can play as either video or just audio and can pause or repeat.
The surprising number of non-undergrad listeners have, in my opinion, led to her getting and taking advice such as yours in more recent videos.
One of the interesting observations of her audience is the bimodal distribution of kids/students vs others which seem to correlate with different preferences as to pace and duration of watching. Kids seems to target a video until they get the info they need for a test or assignment while other listeners seem to take on the whole session. 😊
Great!!👏👍
You really should get down to the Nitty Gritty, it's a geology chanel after all....
My instincts in this area (partly based on established information) is that microbes (especially in the ocean) have much greater effects on oxygen and carbon dioxide balances than larger creatures; that plants are more important than animals; and that oceans are usually more important than land creatures. in particular, I'm skeptical that large land animals were ever directly ecologically significant compared to microbes, plants, and small ocean creatures.
Would it be correct to say, Rachel, that before soil developed on Earth there was regolith?
3:56 Where did all the sulfur come from?
13:57 This confuses me, since phytoplankton are the *major* producers of oxygen in the biosphere, and they live in the ocean. Being in the ocean, why didn't _they_ oxygenate the oceans?
17:00 Did the phytoplankton just oxygenate the surface / epipelagic zone?
23:57 O2 levels got up to about 30% around 300-150Mya.
O2 levels got up to 35% 300 million years ago
just letting you know that the only subtitles available are 'Vietnamese auto-generated'
Your class is wonderful, but I can"t stop look to you, that's why I love ugly teacher.😊
15:17 The Spice must flow.... to oxygenate the ocean.
Back when the Earth's seas were literally rusting.
You talk too fast; insufficient time to absorb what you are teaching. Also get a better set of microphones. There is too much reverberation causing dissonance in your words. However, your videos are fantastic in articulating why there were great bursts in evolution over time.
Playback speed can be controlled by each listener.
Slow it down to like 25% so you can keep up.
You need to improve the audio quality. Hard to listen. Shrill.
She just needs a microphone that baffles reverb. The echo is the problem. Absent that she might try some acoustic modification of that bare wall behind her. It's a process, like everything.
Random mutation, natural selection is impossible. Sophisticated DNA that is from plants comes from Intelligent Design purposeful origin only. I have no problem with the time and aging you discuss. You are otherwise very knowlegeble.
You have cool videos but sometimes your political ideation turns you into a Cray cray.
The Devonian was one of the first things that got me interested in geology! Growing up in NE Ohio there were these huge shale cliffs in walking distance from my home that became famous for their dunkleostus fossils. The discovery of those fossils is actually a major reason why Cleveland today has the conservation funding for it's metroparks (of course, there still are issues with pollution and encroaching development). But I'd sit in awe as a kid staring at those cliffs (img-aws.ehowcdn.com/700x/cdn.onlyinyourstate.com/wp-content/uploads/2019/06/44819465324_6a8b6c57f8_k.jpg) and imagining how deep and massive the river was millions of years ago, and imagine myself standing where a shark or armored fish was once swimming during the Devonian. At the preserve's main building they had a recreation of dunkleostus jaws gaping open that you could walk through to truly understand the size of these armored fish.
That is so cool! Now I want to visit the cliffs and the dunkleostus recreation! Sounds like such a great preservation of Devonian times, thanks for sharing this ;D