#sedimentology — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #sedimentology, aggregated by home.social.
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I have an #ichnology question. In Tralee Ireland I came across calcareous flagstones with amazing serpitiform trace fossils. I've never seen anything quite so large with such a form. Individual traces are perhaps up to 50cm long by 2-3cm wide. Has anyone a name for this? The closest I can think of is taenidium serpentium but that shows meniscate backfills, not evident here.
Answers greatfully received.
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I have an #ichnology question. In Tralee Ireland I came across calcareous flagstones with amazing serpitiform trace fossils. I've never seen anything quite so large with such a form. Individual traces are perhaps up to 50cm long by 2-3cm wide. Has anyone a name for this? The closest I can think of is taenidium serpentium but that shows meniscate backfills, not evident here.
Answers greatfully received.
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I have an #ichnology question. In Tralee Ireland I came across calcareous flagstones with amazing serpitiform trace fossils. I've never seen anything quite so large with such a form. Individual traces are perhaps up to 50cm long by 2-3cm wide. Has anyone a name for this? The closest I can think of is taenidium serpentium but that shows meniscate backfills, not evident here.
Answers greatfully received.
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I have an #ichnology question. In Tralee Ireland I came across calcareous flagstones with amazing serpitiform trace fossils. I've never seen anything quite so large with such a form. Individual traces are perhaps up to 50cm long by 2-3cm wide. Has anyone a name for this? The closest I can think of is taenidium serpentium but that shows meniscate backfills, not evident here.
Answers greatfully received.
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I have an #ichnology question. In Tralee Ireland I came across calcareous flagstones with amazing serpitiform trace fossils. I've never seen anything quite so large with such a form. Individual traces are perhaps up to 50cm long by 2-3cm wide. Has anyone a name for this? The closest I can think of is taenidium serpentium but that shows meniscate backfills, not evident here.
Answers greatfully received.
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Neogene Uplift Of The Chiribiquete Tabletop Mountains In The Colombian Amazon And Its Paleobiogeographic Implications
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https://doi.org/10.1016/j.palaeo.2026.113645 <-- shared paper
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H/T Richard F. Ott
“The Chiribiquete are table top mountains located deep in the Colombian Amazon and host many rare endemic species. Helanlin Xiang's work shows that the Chiribiquete Mountains likely upifted before the Early Miocene and could have acted as a long-lived stepping stone, connecting species in the Andes with the Guyana Shield…”
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#Miocene #Paleogeography #Palynology #Amazonia #Caquetá #paleobiogeography #Columbia #Amazon #jungle #geomorphology #neogene #uplift #geology #structuralgeology #tectonics #Chiribiquete #tabletopmountains #Andes #GuyanaShield #dating #isotopes #biome #ecosystem #tepui #elevation #sedimentology #stratigraphy #Araracuara #fluvial #lacustrine #deposition orogeny #regional #uplift #drainage #hydrography #hydrology #river #network #GIS #spatial #mapping #spatialanalysis #spatiotemporal #geophysics #seismology -
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 -
Conceptualizing River Floodplains
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https://doi.org/10.1029/2024EF005681 <-- shared paper/commentary
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"PLAIN LANGUAGE SUMMARY: River floodplains are integrative ecosystems in which diverse processes operate together to maintain river health. Floodplains are as critical to river health as the channel itself, yet floodplains lack the legal protections afforded to river channels in many countries.
KEY POINTS
• A river floodplain is an integrative physical, chemical, biological system and a key component of a river corridor
• Contemporary societal perceptions and regulatory frameworks do not reflect this scientific consensus...”
#water #hydrology #river #floodplain #surfacewater #geology #sedimentology #geomorphology #ecology #biogeochemical #policy #planning #interdisciplinary #model #modeling #management #monitoring #ecosystem #riverhealth #legal #regulations #humanimpacts #overview -
Landslide Influence On Delta Stratigraphy, Northeastern Gulf Of Mexico
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https://doi.org/10.1130/GES02908.1 <-- shared paper
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https://zenodo.org/records/15857064 <-- shared seismic reflection datasets
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#spatial #mapping #marine #submarine #chanels #canyons #GulfOfMexico #delta #massmovement #landslide #submarinelandslide #remotesensing #geophysics #seismic #reflection #engineeringgeology #sediment #sedimentology #delta #stratigraphy #hydrology #deepwater #fault #faulting #glacioeustatic #erosion #model #modeling #scarp #masstransport #shelf #shelfmargin #geologicmapping -
Mapping a Carrington Storm [in today's setting]
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https://doi.org/10.1029/2025GL116835 <-- shared paper
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#spatial #mapping #spaceweather #Carrington #magneticstorm #historicstorm #model #modeling #spatialanalysis #map #impacts #humaninpacts #geomagnetism #magneticfield #geoelectric #field #magnetotelluric #geophysics #USA #infrastructure #geology #sedimentology #geopotential #communications #utilities #energy #powertransmission #blackouts #rik #hazard #damage #publicsafety #cost #economy #mitigation #benchmark #remotesensing #earthobservation -
This month's mini haul from World of Books includes a handy work-based textbook find 📚 #Bookstodon #BookSky #Books #Reading #SecondHandBooks #WorldOfBooks #MarineBiology #OceanSciences #Sedimentology
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Vortex Trapping Of Suspended Sand Grains Over Ripples
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https://doi.org/10.1029/2023JF007620 <-- shared paper
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“KEY POINTS
• Observations of vortex-trapped grains suggest delayed settling of advected grains, as well as delayed advection of grains mobilized from the bed
• Quantitative comparisons of vortex-trapped sand grains compared well with theoretical formulations by Nielsen (1992, https://doi.org/10.1142/1269) for a forced vortex
• Improved understanding of vortex trapping effects on sediment dynamics may decrease uncertainty in large-scale coastal model predictions..."
#spatial #model #modeling #water #hydrology #hydrodynamics #vortex #sand #sediment #transport #sedimentation #sedimentology #morphodynamics #fluiddynamics #ripples #coast #coastal #research #velocimetry #suspension #experimentation #dynamics #geology #processes #geomorphology #geomorphometry #vortextrapping #sand #grains #flow #ripple #sandwaves #ripples -
Arctic River Erosion Linked To Permafrost Thaw
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https://phys.org/news/2024-10-arctic-river-erosion-linked-permafrost.html <-- shared technical article
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https://www.nature.com/articles/s41586-024-07978-w <-- shared paper
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#GIS #spatial #mapping #Alaska #climatechange #water #hydrology #Koyukuk #Yukon #melting #permafrost #erosion #geomorphology #geomorphometry #sedimentology #fluvial #Arctic #spatialanalysis #spatiotemporal #model #modeling #flood #flooding #avulsion #rerouting #thaw #thawing #flow #spring #snowmelt #remotesensing #satellite #imagery #change #migration #soil -
The Egyptian Pyramid Chain Was Built Along The Now-Abandoned Ahramat Nile Branch
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https://doi.org/10.1038/s43247-024-01379-7 <-- shared paper
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#GIS #spatial #mapping #Egypt #pyramid #pyramids #Nile #NileR #NileRiver #water #hydrology #archaeology #AncientEgypt #desert #meander #branch #radar #satellite #remotesensing #earthobservation #EO #geophysics #GPR #sampling #soil #coring #subsurface #sedimentology #NileValley #Ahramat #AhramatBranch #WesternDesertPlateau #OldKingdom #MiddleKingdom #causeways #ValleyTemples #harbours #construction #engineering #transportation #river #buildingmaterials #paleohydrology