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sumnerd
Registrace 28. 12. 2006
Sedimentology and geobiology videos plus some mars, scientific visualization, and arts.
Rattlesnake Canyon, Page, AZ
A magical morning in Rattlesnake Canyon with Nyla from Antelope Hogan B&B.
Sound is from californiaherps.com/snakes/pages/rattlesnakesounds.html (Only a cute little Bull snake was observed on the trip, no rattlesnakes. They were present only in spirit, with their animal friends.)
Sound is from californiaherps.com/snakes/pages/rattlesnakesounds.html (Only a cute little Bull snake was observed on the trip, no rattlesnakes. They were present only in spirit, with their animal friends.)
zhlédnutí: 61
Video
Sed Strat Lab: Copper River Samples
zhlédnutí 70Před 2 měsíci
In this video, Emilia Hernandez documents the locations of samples collected for the Grains lab for GEL 109L Sedimentology and Stratigraphy at UC Davis. She is along the Copper river in Alaska in an area that is mostly fed by glacial melt water. Thus, there is a lot of suspended sediment in the rivers. The samples were collected in an area that is submerged by river water on warm days when ther...
Henna applied by Alina in Agra, India
zhlédnutí 148Před 6 měsíci
I was in Agra for two weeks in December 2023, visiting friends and family, including Alina. She is an outstanding henna artist and offered to do my hands before I returned home. This video shows part of that process and the beautiful results. I really appreciate her skill and artistic sensibility. The designs are traditional, implemented with her creative sensibilities. Alina is sometimes avail...
Visiting Agra with Azeem Khan
zhlédnutí 140Před 6 měsíci
Azeem Khan ( 91 98374 00191 phone and WhatsApp) is a tourist tuk tuk driver in Agra, India, and he is now a good friend of mine. I met him in March 2020 when he took me (a solo woman traveler) around for a magical few days in Agra just before global lockdown. We kept in touch, and I returned to Agra for an extended visit in December 2023. Again, Azeem has taken care of all my transportation and...
Clay Cup Chai in Azeem's Neighborhood, Agra, India
zhlédnutí 355Před 6 měsíci
Azeem took me to his friend's chai shop where we had a delicious cup of masala chai in an interesting context. There's even a monkey in the video! Azeem Khan - tuk tuk driver for tourists in Agra, India 91 98374 00191 (phone and WhatsApp) There's more information about Azeem in this video: czcams.com/video/ykC-kTdQCG0/video.html Feel free to ask me questions in the comments!
Oxidation of Earth's Surface (geobiology)
zhlédnutí 456Před 2 lety
The evolution of oxygenic photosynthesis provided the first significant flux of an oxidant to Earth's surface. When enough was O2 was being produced by cyanobacteria relative to the flux of reducing chemicals that consumes it, O2 accumulated in the atmosphere. In this video, I talk about that transition.
A model of the evolution of oxygenic photosynthesis (geobiology)
zhlédnutí 303Před 2 lety
Oxygenic photosynthesis involves two photosystems with different evolutionary histories. In this video, I discuss a model where the genes for photosystem I and II came from two different bacterial lineages to combine in the ancestors of cyanobacteria.
Microbial Mat Biogeochemistry (geobiology)
zhlédnutí 752Před 2 lety
Microbial mats grow on sediment surfaces with the organisms organized by their metabolisms. In this video, I discuss a typical mat organization with oxygenic phototrophs at the top with aerobic respirers, sulfate reducers, and fermenters as part of the community. I show example biogeochemical gradients from the water into the mat, reflecting metabolic processes.
Metabolic Reactions for Energy (geobiology)
zhlédnutí 145Před 2 lety
Organisms, especially bacteria and archaea, get energy from a variety of chemical reactions. Photosynthesis and aerobic respiration are the two best known. Fermentation, sulfate reduction, methanogenesis, and methanotrophy are also important. Numerous other reactions can be evaluated using an "electron tower" of oxidation and reduction half reactions. In this video, I provide chemical reactions...
Microbial "Food" Loop (geobiology)
zhlédnutí 205Před 2 lety
Food webs are a key aspect of ecosystems. However, for entirely microscopic ecosystems, especially those without animals, most biomass and nutrients are passed through particulate and dissolved inorganic carbon pools. In this video, I talk about microbial food webs and the changes when the first grazers evolved.
Sed Strat - Alluvial Fan Stratigraphic Column
zhlédnutí 698Před 2 lety
In this video I draw part of a stratigraphic column from a sketch of an outcrop of sandstones and conglomerates deposited on an alluvial fan in the Cretaceous Yongdong Basin, Central Korea. The data and facies are from Sohn, Rhee, and Kim (1999, Debris Flow and Hpyerconcentrated Flood-Flow Deposits... J of Geology, v. 107, www.journals.uchicago.edu/doi/abs/10.1086/314334?journalCode=jg).
Ecological Structure and Ecosystem Resiliency (geobiology)
zhlédnutí 225Před 3 lety
The structure of interactions among organisms in an ecosystem determines how the system as a whole responds to various disturbances, such as extinction or climate change. In this video, I illustrate how different populations of organisms play different roles in an ecosystem, with different dependencies on each other. I use two simplified ecosystems with a general structure similar to one illust...
Low and High Primary Productivity Examples (geobiology)
zhlédnutí 229Před 3 lety
In this video, I use Greenland near the ice sheet as an example of a low primary productivity ecosystem and the Amazon tropical rainforest as an example of a high primary productivity ecosystem. The amount of primary productivity strongly influences the biomass of the ecosystem as well as the diversity of consumers, including grazers and predators.
Primary Productivity (geobiology)
zhlédnutí 94Před 3 lety
In this video, I describe the process some organism can do to convert inorganic carbon (CO2) into organic molecules to make biomass.
Primary Productivity Supports Ecosystems (geobiology)
zhlédnutí 97Před 3 lety
In this video, I talk about how primary productivity supports ecosystems, but only about 10% of biomass eaten by other organisms remains as biomass. The rest is consumed to provide energy.
Where did Eukaryotes Come From? (geobiology)
zhlédnutí 146Před 3 lety
Where did Eukaryotes Come From? (geobiology)
Domains of Life and Phylogenetic Trees (geobiology)
zhlédnutí 501Před 3 lety
Domains of Life and Phylogenetic Trees (geobiology)
Mutations 2 - Reconstructing phylogeny/history from genetic similarities & differences (geobiology)
zhlédnutí 140Před 3 lety
Mutations 2 - Reconstructing phylogeny/history from genetic similarities & differences (geobiology)
Mutations 1 - Types in a genetic sequence (geobiology)
zhlédnutí 92Před 3 lety
Mutations 1 - Types in a genetic sequence (geobiology)
Developmental Genes Example - Paperwhites (geobiology)
zhlédnutí 106Před 3 lety
Developmental Genes Example - Paperwhites (geobiology)
Gene expression and a tiny bit about epigenetics (geobiology)
zhlédnutí 111Před 3 lety
Gene expression and a tiny bit about epigenetics (geobiology)
Photosynthetic Cell Structure: Cyanobacteria and Algae (geobiology)
zhlédnutí 2,9KPřed 3 lety
Photosynthetic Cell Structure: Cyanobacteria and Algae (geobiology)
Cell Structure - Bacteria (and Archaea) vs Eukaryota (geobiology)
zhlédnutí 258Před 3 lety
Cell Structure - Bacteria (and Archaea) vs Eukaryota (geobiology)
Requirements for life and habitability (geobiology)
zhlédnutí 101Před 3 lety
Requirements for life and habitability (geobiology)
Silicon-based life? Not likely! (geobiology)
zhlédnutí 210Před 3 lety
Silicon-based life? Not likely! (geobiology)
i keep coming back to this to get a visual of the changes.. trying to understand the geology in west clare.. thanks
Thank you for explaining this to me.
چاي😂
U remind me of my ex except she’s 23 Sigh
Wonderful to see another video posted regarding race. I love that 12 years ago you spoke boldly about microaggressions and the lack of individuality afforded to black men in American society
nice
Nicely explained
Really useful info
Since yesterday morning (26/02/24 ) to today 27/02/24 ) upto 5-30 pm we have got a chance to get the company and hospitality of Azeem Khan bhaiya.Addressing Azeem bhaiya as auto driver will be a inappropriate use of word.Rather we should consider him as a friend indeed for the persons at large comming to Agra for any purpose. Always his hands are unfolded to welcome all who approaches for any sort of help and guidance.I must suggest to make a note of his ph no for your safe and happy staying and visiting in and around Agra
Thanks, good and simpler explanation 😊
Thanks for posting your videos are great! Regards from Peru
Great
can u explain the differnce between estuary and lagoon please
An estuary is a flooded river valley. It has fresh water flowing into it from the river. A lagoon is an area near the shore that is isolated from the ocean or sea with a sand barrier, possibly with an inlet. It is not a river valley. Lagoons rarely have rivers flowing into them because the river water tends to erode through the sand barrier. However, they can have smaller creeks flow into them.
due to islamic invader destroying most anceint north indian temples , south of india due to less infleunce of invasion from north west due to distance large anceint temple are present , there are ruins also but woudl advise u to go to tamil nadu , brihadesvara temples tha njabur , or kalinjar fort in madhya pradesh india have alot to offer then this mughal architecture , u can check brihadeshvara temple and kalinjar fort in youtube vlogs , stay safe just like everywhere people cant know real faces they can act good to earn trust ,have a amazing journey mam
promo sm 😋
When u visited ??
March 2020 and December 2023 - I just got back home on January 1 2024!
@@sumnerd we will be going taj mahal on this 7th or 8th of 2024.
No, I am back home in the US now. Will you be there?
@@sumnerd yes we are going for Taj mahal visit.
@@abhishekkaushik8192 Enjoy your visit? If you hire Azeem, let him know you saw this video! And I do recommend hiring Azeem.
So good to hear
thank you so much i am in 11th grade in a german school and no video was as good as yours
why is this information important
i came here to see the conditions that form a braided river
Is not useful
You are the best ❤
Thank you, Professor.
Very interesting
You’re beautiful
. What controls the thickness of a set of tabular cross bedding
How can the presence or absence of pebbles in a succession be used to prove or disprove an aeolian origin?
How is the grain size of a sandstone normally established in the field? Why is it important to record the grain size?
Grain sizes can be observed with a hand lens and compared to a grain size chart in the field. (Do a google image search with "grain size chart" to see examples, and I use one in this video: czcams.com/video/c_iKzc42hDo/video.html). Grain size tells us a lot about the past flow speeds that transported and then deposited them. Larger grains require faster flow speed (or deeper flows) to be transported. I describe these relationships in this video: czcams.com/video/rs0uqds7NEk/video.html
In a wave-influenced delta like the modern Niger and ancient Brent Delta, what controls the eventual shape of a potential reservoir in the middle and upper shoreface? How does this differ from the delta-front deposits of the modern Mississippi? Illustrate with a sketch.
CAN YOU TELL ME THE OF SOFTWARE THAT YOU USED TO DRAW ?
Adobe Illustrator (Apple IOS version)
thank you so much
Nice simple explanation…from department of geology iraq am a student and we have a subject in detail about turbidity currents.thanks!
Thank you very much for these valuable lectures. These videos on sedimentary petrology helped me a lot 👌
Your too cute to me
Did u find a black man yet
So the simple creatures aren’t that simple! I see intelligent design everywhere
Thanks a lot
Interesting
The fact that you have black art on your walls. Your fine to me
Thank you for the good explanation!
You are amazing. The way you described it makes the concept super easy .❤
Thanks for the lesson. I now have an idea on how a sedimentary log is constructed.
You’re cute and smart 😍😍😍
DOMKOP
Amazing work
Are you serious? Cyanobacteria did not invent anything! They have no brains. They cannot plan the future. The oxygenics photosynthesis process is beyond even our human intelligence. Biology doesn't work that way it has no foresight so it cannot build these systems one DNA strand at a time. Cyanobacteria were invented by an intelligent being to terraform the Earth, that is the only logical conclusion. Just ask yourself this question. Over three billion years ago right after the late heavy bombardment cyanobacteria show up pumping oxygen into the atmosphere. Without that process we would not be here. So don't kid yourself that this is just some fluke accident of evolution. What you are looking at is an incredibly complex terraforming machine.
The community interpreting the origin of oxygenic photosynthesis has good, consistent (although incomplete) models for its evolution. These are grounded in observations and data, interpreted with processes we can observe working in life today. The models make predictions that we can test and then use the results to refine the models. This is the process of science. If we are wildly wrong, our predictions will be wrong. We learn the most when they are wrong. At this point, we do not need to invoke magical activities by an intelligent being for the origin of oxygenic photosynthesis. Rather, we can use evolutionary theories and ecological interactions, which I prefer to base my models on.
@@sumnerd I believe your models are wrong and you know nothing about biology
Welcome back!!!👍🏿
Mam, diatoms can provide clues to silica rich compositions
A Very intelligent Share