Paleosols (Ancient Soils) | GEO GIRL
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- čas přidán 8. 07. 2024
- This video is meant to follow "the soil profiles and types" video and provides information about paleosol identification, classification, and usefulness.
References:
Earth System History: amzn.to/3n4yOCq
doi.org/10.1016/B0-08-043751-...
sites.google.com/site/wvugeol...
doi.org/10.1016/j.jseaes.2017...
doi.org/10.1186/s42501-020-00...
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Non-textbook books I recommend:
Oxygen by D. Canfield: amzn.to/3gffbCL
Brief history of Earth by A. Knoll: amzn.to/3w3hC1I
Life on young planet by A. Knoll: amzn.to/2RBMpny
Some assembly required by N. Shubin: amzn.to/3w1Ezm2
Your inner fish by N. Shubin: amzn.to/3cpw3Wb
Oxygen by N. Lane: amzn.to/3z4FgwZ
Alien Oceans by K. Hand: amzn.to/3clMx1l
Life's Engines: amzn.to/3w1Nhke
Tools I use as a geologist/teacher/student:
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0:00 What are paleosols?
0:43 Identifying horizons in paleosols
2:36 Identifying roots and rhizoliths in paleosols
3:03 Identifying peds in paleosols
3:46 Identifying cutans in paleosols
4:37 Identifying nodules in paleosols
5:25 Identifying burrows in paleosols
6:13 Identifying paleosols by color
7:24 Paleosol classification (paleosol types)
7:50 Calcisols
8:08 Histosols
8:16 Spodosols
8:49 Oxisols
9:02 Vertisols
9:27 Gypsisols
10:14 Using paleosols to reconstruct paleoclimate
Image sources:
creation.com/paleosol-formation
5280lensmafia.wordpress.com/2...
geologylearn.blogspot.com/201...
marlimillerphoto.com/CRB.html
www.slideserve.com/nelly/colo...
www.flickr.com/photos/4744576...
www.flickr.com/photos/jakelle...
www.madrimasd.org/blogs/univer...
sites.google.com/site/wvugeol...
earthsky.org/space/mars-life-...
www.scifaithkansas.net/
doi.org/10.1186/s42501-020-00...
/ 457608012113232399
sites.google.com/site/soilpan...
project.geo.msu.edu/soilprofi...
soil-environment.blogspot.com...
www.britannica.com/science/Ve...
www.madrimasd.org/blogs/univer...
www.astroblogs.nl/2013/09/22/...
Disclaimer: Links included in this description might be affiliate links. If you purchase a product or service with the links that I provide I may receive a small commission, but there is no additional charge to you! Thank you for supporting my channel so I can continue to provide you with free content each week! And as always, let me know your topic suggestions in the comments down below! - Věda a technologie
My late father was a county agricultural agent with a masters in soils science. He used to say that soil isn't dirt :-) Thank you for the opportunity to learn just a bit about the science of soils and helping me appreciate his field of expertise a bit more.
In order: O, A, E, B, C. Gotta love geology huh!?
And while we're at it, how about 'going metric' with all those crazy names for Periods etc. Mississippian. Give me a break.
Thank god you're here because I love this stuff really. Thank you so much.
the only video which could give me all the information required.
Haha I am glad, that is my goal! :)
This came just in time for my geoarch course! thanks chica, this was super helpful!
So many great videos!!😍
Thank you! So glad you like them ;D
nice work!! this is epic. thanks for sharing
this was very informative, thanks!!
Of course! So glad you found it helpful ;)
There is identifiable horizonation in Vertisols.
Oh yea, nice catch!
I'm not sure but I feel like my garden has been scraped so the transition is on top. It's mostly broken rocks and clay. I guess it's just topsoil though, the transition would be too deep?
mam can you please tell me about formation of mukkara structure in paleosol...its given in sam boggs chapter one as an anticlinal structure...and about gilgai micro relief and how they help to identify paleosols. i googled but didn't find any info
I wish I could be of more help, but I couldn't find much on these mukkara structures either. All I could tell is that they are similar to anticlines, but cracked, many call them cracked ridges. But I am unsure how exactly that help to identify paleosols. It says they are produced by the shrinking and swelling of Vertisols, so my guess is they are just structures that can only form in such situations and therefore represent a clear sign of paleosol when found in the rock record. I hope that answers your question, I apologize if that didn't help much, I couldn't find much on it either :/
@@GEOGIRL no issues mam thanks for your help . if i get some info .i will let you know.
I have a query regarding the paleoclimate reconstruction ,how did paleosol helped in providing the co2 concentration, it can just simply be calculated by using the datas from the rs satellites .
Yea, but rocks like paleosols must be used to reconstruct conditions, such as CO2 concentrations, long before humans were around (millions to billions of years ago)
Is there any difference between paleosol and unconfirmity?
@@expeditorsmtech Yep, paleosols are ancient soils, whereas unconformities are surfaces of non-deposition or erosion. In other words, paleosols are represented by a section of rock so muliple layers in the rock record, whereas unconformities are represented by a surface or boundary between two rock layers. Hope that makes sense :)
@@GEOGIRL Both acts as time marker?
@@expeditorsmtech Well that depends. Technicially neither act as a 'time marker' if you mean sometime by which to date the rock. Unless there is a layer of organic carbon containing rock in the paleosol that has radioactive carbon isotopes that we can use to date the rock, we normally cannot get very accurate dates on paleosols because they are sedimentary. Sedimentary rocks are difficult to date because the material that eventually forms the rock typically comes from mulitple different sources. Unconformities are also difficult to date unless you have a 'date-able' layer of rock above and below the unconformity boundary. All that you can really say from an unconformity is that time passed between the deposition of the layer below the boundary and the layer above, but you don't know how much time unless you date both layers. Hope that makes sense :)
Do we know about your degrees ?
If you mean my academic degrees, I am currently working on getting my PhD. I explain it as well as a little bit more myself in my channel intro video if you want to check it out ;)
@@GEOGIRL we are sure excited to hear about your research!
@@Vanda-sv5vr Aw, I am so glad to hear that because I may have a video or two coming out soon about my own research and then maybe onw on my background as well. Thanks for letting me know! :D
@@GEOGIRL You will do well down the line of your future. All my best GIRL, you GEO rock.
@@bishnumishra8224 Thanks so much for the kind words and support! :) I hope you are right!