#sedimentary — Public Fediverse posts

#Colorful #Sedimentary #Rock #Formations by Kaye Menner #Photography Wide variety #Prints & lovely #Products at:

https://kaye-menner.pixels.com/featured/colorful-sedimentary-rock-formations-by-kaye-menner-kaye-menner.html

#sandstone #weathered #patterns #sydney #narrabeenbeach #homedecor #mastoart #fediverse #fediart #fedigiftshop #giftideas #wallartforsale #Art #artforsale #BuyIntoArt #AYearForArt #Artist #FineArtAmerica #PhotographyFeed #VisualArts #CreativeArts

Late Quaternary Variations in the Level of Paleo-Lake Malheur, Eastern Oregon
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https://doi.org/10.1006/qres.1998.2005 <-- shared paper
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https://www.oregonencyclopedia.org/articles/pleistocene-pluvial-lakes/ <-- shared technical article, “Pleistocene Pluvial Lakes” [OR]
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https://en.wikipedia.org/wiki/Malheur_Lake <-- shared Wikipedia page
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#EasternOregon #water #hydrology #geology #surfacewater #paleolake #LakeMalheur #Oregon #SouthernOregon #USA #endorheicbasin #endorheic #quaternary #fluvial #pluvial #fluvial #lacustrine ##Quaternary #Pleistocene #Holocene #PaleoLake #sediment #sedimentary #beaches #gravel #geology #sedimentology #tephra #volcanism #spatialanalysis #spatiotemporal #geologichistory #spatial #mapping #sampling #stratigraphy #dating #radiocarbon #chronology

Stratigraphic Evidence For Modern-Like Glacier Extents In South-Central Alaska Within The Last Glacial Period (MIS 3)
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https://doi.org/10.1111/bor.70043 <-- shared paper
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https://www.nps.gov/articles/000/ancient-glacier-change.htm <-- shared @NPS technical article
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#glacier #Wisconsinan #glaciations #alaska #iceage #sediments #moraines #geology #stratigraphy #model #cryosphere #ice #snow #sedimentary #Chitina #CopperRiver #proglacial #water #hydrology #fluvial #glaciofluvial #glaciolacustrine #fans #Holocene #geomorphology #geomorphometry #landform #hydrogeomorphology #sedimentology #stratigraphic #sampling
@NPS

Low Sinuosity Meandering Rivers Before Vascular Plants - Cambrian Tapeats Formation, Arizona, USA
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https://doi.org/10.1130/B38336.1 <-- shared paper
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#water #hydrology #Arizona #bars #braided #streams #Cambrian #channels #clastic #conglomerate #floodplains #fluvial #hydromorphology #sedimentation #landscape #LowerCambrian #meander #mechanism #migration #mudstone #Paleozoic #Plantae #pointbar #rivers #sandstone #sedimentary #Silurian #sinuosity #UnitedStates #USA #TapeatsFormation
@GSA

Crack in the layered rock at Treman State Park

#photo #photography #blackandwhite #monochromemonday #monochrome #rocks #ithaca #upstateny #sedimentary #gorge #treman

To assess the risk of floods, we need detailed, long-term records, much longer than the instrumental record can offer. Geological record helps, but the time control on them isn't great. That calls for a different information source to constrain the events in those records, such as historical chronicles.

Link: https://www.sciencedirect.com/science/article/pii/S2666033425000255

#history #geology #sedimentary #flood

A special #WeekendReading for the date - my dissertation! An unhinged monograph written with too much coffee and not enough sleep about #sedimentary cycliciy, evaporite sequence #stratigraphy, and #environmental reconstruction of the awesomely named Triassic Mohilla Fm.

https://zenodo.org/records/15656179

Ancient Lakes And Rivers Unearthed In Arabia's Vast Desert
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https://phys.org/news/2025-04-ancient-lakes-rivers-unearthed-arabia.html <-- shared technical article
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https://doi.org/10.1038/s43247-025-02224-1 <-- shared paper
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#GIS #spatial #mapping #water #hydrology #quaternary #desert #geomorphology #landforms #geomorphometry #Arabia #climatechange #RubalKhali #SaudiArabia #holocene #model #modeling #spatialanalysis #spatiotemporal #earthsystemmodel #geology #lacustrine #fluvial #sediments #sedimentary #flood #flooding #lakes #AfricanMonsoon #rivers #paleohydrology #stratigraphy #remotesensing #landsat #earthobservation #dating #delta #cliff #terrace #rainfall #precipitation

Hairy Neil @rovingrollo.bsky.social reminded me that it's #RockinTuesday Here's a lovely rock from the creek bed of Gunlom waterfall creek, a water-carved history of geological time past, frozen waves. #photography #geology #kakadu #rocks #patterns #sedimentary #EastCoastKin #PhotographersUnited

Microbialites ( #sedimentary buildups formed by microbial activity) were very common in the Proterozoic, but other groups took over in the Phanerozoic. But when the #environment is stressed, they come back - and we can use them to infer on past #ecological stress gradients, but also the conditions at the stressed end member.
https://www.sciencedirect.com/science/article/pii/S0031018215005404
I rather like this paper, and to me, it's one of my most underperforming as far as citations are an index. So let me highlight it once more.

We have a new pape! We explore the complex interactions between #climate, water chemistry, and post-depositional #sedimentary processes... and how they can produce some wierd #minerals.
https://www.lyellcollection.org/doi/full/10.1144/jgs2024-146

Open (funded) #PhDposition at the University of Vienna (with Theresa Nohl, the most caring person you'll ever meet) about how time is preserved in the #sedimentary record.
https://www.egu.eu/jobs/6596/open-phd-position-in-the-fwf-funded-project-update-for-understanding-geological-time/

The SedsOnline student seminar tomorrow is worth attending. The theme is #Sedimentary Systems in the #energytransition, and it highlights new voices in this space.
https://sedsonline.com/webinar-registration/

Now live - #MinCup24 Round 1 Match 1: Kaolinite vs. Abelsonite. Not much of a fight if you ask me (#sedimentary bias).

https://www.mineralcup.org/2024/vote/r1m01

#WeekendReading: Halevy et al., about the impact of inorganic reactions and transport in depositional environments on the isotopic composition of pyrite. TLDR - look also at the #sedimentary context, not just the #geochemistry.

https://www.science.org/doi/10.1126/science.adh1215

A bizarre #sedimentary feature

Some layers in the #Neoproterozoic #Squantum Member of the #Roxbury #Conglomerate have been rolled up like a pie crust, into a tube. If this were a #tillite, as it once was thought to be, then it could have been caused by the drag of a #Gaskiers #glacier over the till. These rocks are mostly interpreted as deposited by submarine debris flows these days, in which case they could’ve been deformed during a slump and flow. Site of a field trip for #UMassBoston.