Patterns in Evolution - Part 2
25:26
Patterns in Evolution - Part 1
19:33
Correlation - Part 3
23:50
4 ай бұрын
Correlation - Part 2
24:24
4 ай бұрын
Correlation - Part 1
23:34
4 ай бұрын
Stratigraphy - Part 2
25:07
5 ай бұрын
Stratigraphy - Part 1
23:09
5 ай бұрын
Radiometric Dating - Part 2
43:34
5 ай бұрын
Radiometric Dating - Part 1
33:10
5 ай бұрын
Relative Dating Part 2
14:21
5 ай бұрын
Relative Dating Part 1
27:51
5 ай бұрын
Пікірлер
@tigrecito48
@tigrecito48 12 күн бұрын
Hey, I watched this recently: The Largest Mountains To Ever Exist Were Created By Prehistoric Life It basically states that all the mountains on Earth were caused by Microbes/Bacteria & plate tectonics. The theory being that all the dead matter from life under pressure turned into shale rock? Or some rock, I forget which. And that made a super slippery layer that meant mountains could form. And apparently, before life existed on Earth, there were no mountains. So my question would be, does this mean that any mountains on any other planetary body in the universe that also at some time in its history had a hot centre, and plate tectonics, does it mean that if that planet also has mountains, that it would prove 100% that that planet either has life on it or once had life on it in the past?
@slant6mind59
@slant6mind59 14 күн бұрын
I wish nothing but the best for you. I have so enjoyed the content you have already generated. I found it so informative and interesting. Please bring us more when you are up to it.
@JazminHernandez-rp7fl
@JazminHernandez-rp7fl 23 күн бұрын
Does anyone have the answers 🥹
@henrydetlef8353
@henrydetlef8353 Ай бұрын
Thank you for this nice presentation, very educational.
@adrianf.5847
@adrianf.5847 Ай бұрын
I've come up with an entirely different theory to explain the shape of the greenstone belts. What if they reflect something like dunes, but on the interior side of the crust? When the earth was young and hot, perhaps there were dune-like deposits on the inner side of the crust that were shifted as dunes by wind. Eventually, the interior side of the crust would have been levelled and the combs of the dune pushed upward, creating mountains, between which the sea flowed in, allowing for the shallow sea materials to form.
@adrianf.5847
@adrianf.5847 Ай бұрын
Come to think of it, the most likely theory is that the magma behaved like dunes before the crust solidified. Then water came in (or the bands/dunes sank), and that's where the sandstone/limestone/etc. comes in.
@adrianf.5847
@adrianf.5847 Ай бұрын
A priori, in Archean times, we can't exclude internal mantle forces that would have simply pushed the oceanic crust upward. Also, is it really impossible that the Greenstone belts were pushed upward by enormous amounts of underplating?
@adrianf.5847
@adrianf.5847 Ай бұрын
Finally, what about subductive and other downward processes acting on all other parts of the crust, decreasing the relative height of the piece of ocean floor of our interest?
@adrianf.5847
@adrianf.5847 Ай бұрын
As I understand it, the continental accretion works because mainly shallow waters are being eliminated.
@adrianf.5847
@adrianf.5847 Ай бұрын
One extension of the back arc model one could come up with is that the compression event is weakened by competing downward magma streams on the left in the picture, allowing the process to repeat itself on the right part of the islands. In case of an equal split of the original island arc, we would then see though that the overall volume of the stripes decreases exponentially in one direction.
@adrianf.5847
@adrianf.5847 Ай бұрын
Perhaps one could save the theory by assuming that in further iterations, ALL the resulting arcs split again.
@adrianf.5847
@adrianf.5847 Ай бұрын
Wouldn't the presence of sandstones, limestones and banded iron formations suggest that the greenstone (which formed at a deep sea environment) was later lifted by plate tectonics to shallow sea environments, where the sandstone etc. deposits formed?
@adrianf.5847
@adrianf.5847 Ай бұрын
I also wonder what clouds would have looked like in the early earth's atmosphere (if they even existed). Would they have also been white, or rather tainted like on Venus? That may also have affected the amount of radiation absorbed by the clouds.
@adrianf.5847
@adrianf.5847 Ай бұрын
I wonder: About the Titanium experiment, were the zircons all dated differently, or are we simply given some confidence interval? If the former option is true, it may be interesting to look at whether zircons from 4.1 Ga or younger show more signs of low temperature melting, which would favour the theory of Late Heavy Bombardment water addition.
@TomiTapio
@TomiTapio 2 ай бұрын
Excellence in boring, therefore good #bedtimelistening
@cwinnin
@cwinnin 2 ай бұрын
😉
@user-xe3mj9kb2x
@user-xe3mj9kb2x 2 ай бұрын
Yo Mr. White! Yeah, science!
@platovsky
@platovsky 2 ай бұрын
amazing
@northern.mountains
@northern.mountains 2 ай бұрын
thank you
@cwinnin
@cwinnin 2 ай бұрын
@jensmash
@jensmash 2 ай бұрын
Could you do this series with a focus on Gondwana too? This series is really good but its mainly focused on Laurasia..
@imitatio
@imitatio 2 ай бұрын
Dr White has a very rare gift: the genius for explanation: for putting the right word in the right place, at the right time. Much appreciated by those of us who struggle, not just to apprehend, but to comprehend the complex web of relationships that must be established, between these “words”, so that the story can stick - take hold and take shape- in our memory.
@TomZidel
@TomZidel 3 ай бұрын
Transgressing facies... Can't get away from politics anywhere
@TomZidel
@TomZidel 3 ай бұрын
When do you get to south America?
@TEmery
@TEmery 3 ай бұрын
A geologist going climate propagandist?
@Merle1987
@Merle1987 3 ай бұрын
This guy has the best videos ever.
@pierre-alexandreclement7831
@pierre-alexandreclement7831 3 ай бұрын
❤❤❤❤❤❤❤❤❤❤❤
@juhasznagyjozsef
@juhasznagyjozsef 3 ай бұрын
Welcome back, Dr. White.
@capgains
@capgains 3 ай бұрын
“Helloo everybody “
@lithiumvalleyrocksprospect9792
@lithiumvalleyrocksprospect9792 3 ай бұрын
If BIF is predominantly shallow marine then tidal movement provides cyclic process alowing a shallow estuary to increase in disolved oxygen during day and low tide, also with river inflow to estuary also add disolved oxygen from atmosphere... Then tidal inflow of reduced sea water with high disolved iron mixing and precipitate the iron oxide hydroxide minerals. Disolved silicate could then precipitate as silica gel microspheres with the water chemistry cycling between 2 differing redox potentials?
@lithiumvalleyrocksprospect9792
@lithiumvalleyrocksprospect9792 3 ай бұрын
Stromatolite survival in hypersaline lakes that didnt freeze due to high salinity?
@lithiumvalleyrocksprospect9792
@lithiumvalleyrocksprospect9792 3 ай бұрын
Thanks again for an awesome lecture . Serpentinisation of olivine is exothermic and creates "white smokers" with lower temperature hydrothermal vents ... Providing similar less extreme and potentially longer lived vent chimneys - do these also represent life genesis targets?
@lithiumvalleyrocksprospect9792
@lithiumvalleyrocksprospect9792 3 ай бұрын
Very understandable explanation thankyou. I'm currently trying to understand the yilgarn. Always I lots of questions Liquid water exists at base of very thick ice due to high pressure... Serpentinisation is exothermic as soon as Ocean crust, water and carbon dioxide interacted there should have been chemical heat sources. Serpentinisation also decreases density and creates hydrated minerals... Could serpentinisation created more buoyant Ocean crust? Phylosilicates are slippery and could penetrate deep faults priming with wet clay to facilitate subduction?
@nemodot
@nemodot 3 ай бұрын
I have to say one big part of listening to your lectures is because I like your voice.
@Merle1987
@Merle1987 3 ай бұрын
This guy knows all the orogenous zones.
@marktwain622
@marktwain622 3 ай бұрын
The first comment...
@geneticepistomology
@geneticepistomology 3 ай бұрын
Thank you for the video. It’s nice to feel like I’m back at university without midterms and finals.
@achimkemmerling6086
@achimkemmerling6086 4 ай бұрын
Just finished the complete series. Thank you so much for uploading all of this. It has been a wonderful experience.
@cwinnin
@cwinnin 4 ай бұрын
@cwinnin
@cwinnin 4 ай бұрын
@cwinnin
@cwinnin 4 ай бұрын
@abhishekchoudary1341
@abhishekchoudary1341 4 ай бұрын
Please share pdf / ppt or else the reference material .
@cwinnin
@cwinnin 4 ай бұрын
@maxplanck9055
@maxplanck9055 4 ай бұрын
A dense carbon atmosphere from the smouldering volcanic ball the earth once was, the atmosphere was clearly created from the gas exited the cooling of the volcanic mass the earth began as. This negated the suns lower heat emissions over 4 billion years ago ✌️❤️🇬🇧
@PhilippTiefenbacher
@PhilippTiefenbacher 4 ай бұрын
I really enjoy your lectures. Sadly many otherwise interesting lectures suffer from bad audio but your audio is perfect!
@dominicc8264
@dominicc8264 4 ай бұрын
did i just stumble on free knowledge? fantastic, thank you!
@aresaurelian
@aresaurelian 4 ай бұрын
Could it have been that Mars was an ice world, with volcanoes warming the bottom water?
@pierre-alexandreclement7831
@pierre-alexandreclement7831 4 ай бұрын
❤❤❤❤❤❤
@marktwain622
@marktwain622 4 ай бұрын
The first comment: I love the good Doctor but not sure why.
@okboomer6201
@okboomer6201 4 ай бұрын
Doubling the atmospheric CO2 does not double the "greenhouse effect". Just like doubling the power in a stereo speaker system. If you are blasting out music at 100 watts (loud), and double the output to 200 watts, it does not get twice as loud. You only get a 3 decibel gain. Double it again to 400 watts, another 3 dB gain. Double it again to 800 watts, another 3 dB gain.
@jbyrd655
@jbyrd655 4 ай бұрын
Nobody said doubling the atmospheric CO2 doubles the greenhouse effect.
@GreySectoid
@GreySectoid 4 ай бұрын
Yay more content
@cwinnin
@cwinnin 4 ай бұрын
@cwinnin
@cwinnin 4 ай бұрын