#sediment - Mastodon

2 posts2 participants0 posts today

Greg Cocks @GregCocks@techhub.social

Fluvial System Block Diagrams
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I was looking to understand a fluvial system the other day, up in the high Arctic, as I looked at 3DEP remote sensed elevation data… I have always been fascinated by the how geology, water, weather shapes a landscape, including erosion (aka geomorphology if you will) – and realized how very much value fluvial block diagrams have as we try to conceptualise what has, is and will happen(ed.)
#spatial #spatiotemporal #morphology #meander #levee #understanding #oxbow #pointbar #river #water #hydrology #landform #geomorphology #geomorphometry #geology #fluvial #riverine #weather #climate #erosion #sediment #sedimentation #Arctic #3dep #opendata #DEM #BeringSea #northslope #opendata #fedservice

GeologistsCat @GeologistsCat

Today #GeologyWithCats! We found this #drillcore it's a #sandstone. The white layers had large pores with #water in it. When #sediment was accumulated the pressure was growing & finally the water was squeezed out upwards-its a water escape structure.
Humans #PawForScale
#geology #rocks #sedimentation #sedimentology

Drillcore from a sedimentary rock showing fluid escape structures

Voyage Énergétique @emilie25

Le voyage de cette pierre dans la vie ….plusieurs millions d’année, le gypse mélange de calcite de sodium et de calcaire #trekking #Yoga #travel #travelphotography #zen #desert #retraite #bienetre #nature #naturephotography #drone #badland #meditation #soufflevital #qi #prana #chi #reiki #bardenas #sediment #rochemetamorphyque #gypse #gypsum

Roche de gypse feuilletée des Bardenas

PB Haarlemmermeer @pbhbos@ecoevo.social

#Nature is so amazing. Januari 30th, 2022 I took a #sediment sample at about 30 cm deep from Lake Reeuwijk/NL. Since that time this #chara started ro grow and is still alive after 3 years in this very jar. The only thing I do is add water with fresh lake water. Room temperature remains about the same. Even #ostracods swim around. #Freshwater is like the elixer of eternal life to this #stonewort species.

Chara sp. Started to emerge.

Chara May 7th, 2022

Chara after 3 years in a jar in my study room

Greg Cocks @GregCocks@techhub.social

Coastal Environments - LiDAR Mapping of Copper Tailings Impacts, Particle Retention of Copper, Leaching, and Toxicity
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https://doi.org/10.3390/rs17050922 <-- shared paper
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#GIS #spatial #mapping #remotesensing #earthobservation #coastalenvironment #coast #coastal #mine #tailings #minetailings #GlobalTailingsManagementStandard #Keweenaw #LiDAR #bathymetry #topobathy #UAS #drone #particledispersal #copper #retention #leaching #BuffaloReef #toxicity #Daphnia #benthic #organisms #risk #hazard #contamination #impacts #sediment #water #hydrology #Michigan #USA #LakeSuperior #PortageLakeVolcanic #geology #spatialanalysis #biology #ecosystems #fisheries #trout #enviornmentalimpacts #leaching #riparian #systems

maps - Geographic location of Grand (Big) Traverse Bay (red to green contours) along the eastern shoreline of the Keweenaw Peninsula. On the Peninsula, early copper mines are indicated by black dots within the Portage Lake Volcanic Series (dashed lines) and large stamp mills by stars. Two mills (Wolverine and Mohawk) are located near Gay. Insert shows anthropogenic copper inventory “halo” around the Peninsula, in µg/cm² copper

maps - Grand (Big) Traverse Bay: 2010 LiDAR DEM (digital elevation model) colour-coded by elevation and water depth (depth scale to right). Red horizontal contour lines are at 5 m depth intervals. Gay tailings pile (“original pile”) is indicated, as well as migrating underwater stamp sand bars dropping into an ancient river channel (the Trough; at locations #1, and #5). On the eastern flanks of Buffalo Reef, stamp sands are moving out of the Trough into cobble/boulder fields (#3, #4). Along the western edges, stamp sands have migrated as a beach deposit to the Traverse River Seawall (#8) and are slipping down into an underwater depression (#7) next to cobble/boulder fields. Stamp sands are also moving around the harbour outlet (#8). Hence, both the eastern and western sides of Buffalo Reef are experiencing tailings encroachment. Lower on the reef (#2, #6), there is little contamination. Past the Traverse River, the sands in the southern bay are almost exclusively natural quartz grains (#9), forming a white beach with shoreline cusp-like features and bar, plus ridges (#10) of natural sand moving from the shelf into deeper waters off the bay and into Lake Superior

aerial images - UAS high-resolution drone elevation and bathymetry surveys (base map 9 August 2022) of shoreline retreat at the original Gay pile location after bluff removal. Overlays along the beach edge trace shorelines in 2009, 2016, and 2022. The 78 m retreat over 6 years (2016–2022); equates to a 13 m/yr rate. The previous, nearly constant, long-term retreat rate prior to 2009 averaged 7.9 m/yr (ca. 26′) [7,57]. The original Jacobsville Sandstone shoreline, before stamp sands were discharged, is marked by the red border in the far-left upper region. Note white concrete basements of the two mills and remnants of both wooden and broken concrete launders in the northern region. Environmental recovery is beginning, as benthic organisms and fish are returning to clear underwater stretches of the bedrock shelf, where waves have removed stamp sands. Scattered trees (many birch) are beginning to colonise what is left of the original Gay Pile surface.

photos - Gay Stamp Sand Pile. (a) Wooden discharge launder distributing tailings onto the Gay Pile, around 1922, with smaller sluices conveying stamp sand and slime clays laterally (courtesy MTU Archives). (b) Photo of 6–8 m high stamp sand bluffs in July 2008 off Gay, showing a buried small lateral sluiceway protruding out of the pile along the shoreline. Lake Superior waters are to the right; the dark beach sands are stamp sands with intermixed slime clay layers. (c) Bluff photo from about the same location in 2019, when shoreline erosion (ca. 7–8 m/year) reached the buried launder support beams, just before bluff removal.

Greg Cocks @GregCocks@techhub.social

Ecological Restoration In The Yellow River Basin Enhances Hydropower Potential
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https://doi.org/10.1038/s41467-025-57891-7 <-- shared paper
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#GIS #spatial #mapping #spatiotemporal #spatialanalysis #HEP #hydropower #China #ecology #restoration #YellowRiver #YellowRiverBasin #dam #dams #ecological #renewables #power #energy #generation #restoration #sedimentation #sediment #reservoir #hydroelectricpower #Xiaolangdi #waterresources #water #hydrology #socioeconomic #watershed #management

charts - Accumulated sedimentation and energy generation of the Xiaolangdi Reservoir under scenarios with and without ecological restoration

maps and charts - Location of the Yellow River Basin and changes in vegetation, sediment load, and streamflow

maps & charts - Changes in leaf area index (LAI), gross primary productivity (GPP), soil erosion, evapotranspiration (ET), and runoff (R) in the Yellow River Basin under scenarios with and without ecological restoration

photo - annual cleaning of the Xiaolangdi Dam

CellBioNews @cellbionews@scientificnetwork.de

Ancient #DNA reveals 6,000 years of the lives of #Antarctic #penguins.

#metagenomic #sediment #sedaDNA #Pygoscelis

https://phys.org/news/2025-03-ancient-dna-reveals-years-antarctic.html

Phys.org · Mar 5Ancient DNA reveals 6,000 years of the lives of Antarctic penguinsBy University of Adelaide

Greg Cocks @GregCocks@techhub.social

Seismometers Reveal Earth's Longest-Runout Undersea Sediment Flows In Unprecedented Detail
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https://phys.org/news/2025-02-seismometers-reveal-earth-longest-runout.html <-- shared technical article
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https://doi.org/10.1038/s43247-025-02137-z <-- shared paper
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https://doi.org/10.1016/j.geomorph.2024.109350 <-- shared paper
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https://doi.org/10.1038/s41561-022-01017-x <-- shared paper
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#GIS #spatial #mapping #remotesensing #Congo #CongoChannel #bathymetry #seismometers #monitoring #sediment #flow #submarine #massmovement #canyon #infrastructure #pipes #cables #engineeringgeology #geology #model #current #debrisflow #bathymetric #Africa #offshore #coast #coastal #river #WestAfrica #instrumentation #acoustic #doppler #moorings #turbidity #thalweg #morphology #landslides #stratigraphy #seismic #turbiditycurrent #flow #gradient #slope #erosion #risk #hazard #spatialanalysis #spatiotemporal #seabed

cross section / schematic - Surge dynamics of canyon-flushing turbidity currents

Difference maps showing seabed changes (in metres) in the upper Congo Canyon between 2019 and 2020... The grey shaded base map shows seabed gradients in 2020. Shades of red correspond to areas of erosion, and blue to areas of deposition.

Bathymetric map of the Congo Canyon-Channel system and instrument placement

schematics - Schematic summary of the categories for types of seabed erosion observed in the Congo Canyon-channel between 2019 and 2020, and their relative volumetric importance

A.G. @antisignal

"SEDIMENT OF UNSPOKEN TIME". Abstract digital painting by A.G. (c) 2025. All Rights Reserved. #historiotheque #artoperations #concreterealism #seasonsoftheheart #winterofthesoul #sediment #unspoken #time

CellBioNews @cellbionews@scientificnetwork.de

#Carbonate-dissolving #microorganisms could be key to #sustainable #bioenergy.

#mightymicrobes #methanogens #wetlands #sediment #microbiomes #metagenomics

https://phys.org/news/2025-02-carbonate-dissolving-microorganisms-key-sustainable.html

Phys.org · Feb 13Carbonate-dissolving microorganisms could be key to sustainable bioenergyBy Tiffany Lee

Europe Says @europesays@pubeurope.com

https://www.europesays.com/1833647/ Geoscientists discover evidence of earliest human-caused lead contamination in ancient Greece #CONTAMINATION #expedition #greece #lead #ocean #Sediment #Ελλάδα #νεα

Greg Cocks @GregCocks@techhub.social

Evidenced Paleodrainages In Desert Regions Of Saudi Arabia - Satellite Images With Field-Based Study
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https://doi.org/10.21203/rs.3.rs-4959129/v1 <-- shared paper
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#GIS #spatial #mapping #water #hydrology #streams #poroussediments #pebbles #RadarImages #SaudiArabia #MiddleEast #remotesensing #drainage #paleodrainage #desert #evidence #satellite #imagery #fieldwork #fieldchecked #Quaternary #Pleistocene #climatechange #geology #landform #geomorphology #arid #streamnetwork #PALSAR #ASTER #thermaldifferentiation #spatialanalysis #multispectral #sediment #lithology #hydromorphic #geomorphmetry #waterresources #usecase

maps and photo - Abrupt cut of drainages when reaching loose materials (e.g., sands) as revealed on a geologic map; the same location in the map is shown in the attached photo

annotated image maps - The images above show the current drainages existed on SRTM DEM; while the image below is a processed ALOS PALSAR image showing traces of delta-like shape paleodrainages (DPl); but they do not coincide with the current drainages in the SRTM DEM (image above). Triangle at point S1 is the site where the stratigraphic sequence was investigated.

photo - sand meets the rock outcrops, Hafar Al Batin desert

annotated image maps - he image above shows a shaded figure for an odd paleodrainage (OPl) as shown on the processed ASTER image. The same ASTER image was used below after projecting the current drainages extracted from STRM DEM. There is no coincidence between the OPl and the current drainages evidencing an invisible paleodrainage (OPl). Triangle at point S2 is the site where the stratigraphic sequence was investigated

fuzzle @ cccfr @fuzzle@chaos.social

@fff the funny thing is : there was a year long study if its possible to find markers for the Anthropozän
you, he - we all - may watch this : https://www.youtube.com/watch?v=v1M5dDuh1VQ

which (only) prooves that humans leave many distinct and significant marks in earth climate and geological processes.

https://www.youtube.com/watch?v=v1M5dDuh1VQ

#climate #arte #doku #anthropozän #klima #klimakrise #klimawandel #marker #forschung #industrialisierung #co2 #plutonium #feinstaub #sediment

YouTubeAnthropozän: Der Beginn eines neuen Zeitalters? | Doku HD | ARTEBy ARTEde

A.G. @antisignal

"SEDIMENT GRID: A LATTICE OF FADING SIGNALS". Abstract digital painting by A.G. (c) 2025. All Rights Reserved. #historiotheque #artoperations #concreterealism #seasonsoftheheart #winterofthesoul #sediment #grid #lattice #fading #signals

Levka @LevZadov@kolektiva.social

#ClimateChange #sediment #paleolimnology #Canada

"By using paleolimnology to understand how ecosystems have changed over time, we gain valuable insights into the impacts that human activity and climate change may have on Canadian lakes. This knowledge will serve to preserve the health of our freshwater resources for future generations."

https://theconversation.com/lake-beds-are-rich-environmental-records-studying-them-reveals-much-about-a-places-history-247504

The ConversationLake beds are rich environmental records — studying them reveals much about a place’s historySedimentary deposits containing well-preserved diatom cells record a lake’s environmental changes. Studying them can help us understand the impacts of climate change.

Greg Cocks @GregCocks@techhub.social

Scientists Uncover Evidence Of A Colossal MegaFlood That Refilled The Mediterranean Sea
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https://scitechdaily.com/scientists-uncover-evidence-of-a-colossal-megaflood-that-refilled-the-mediterranean-sea/ <-- shared technical article
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https://doi.org/10.1038/s43247-024-01972-w <-- shared paper
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#GIS #spatial #mapping #remotesensing #Zanclean #megaflood #flood #flooding #Mediterranean #MediterraneanSea #MessinianSalinityCrisis #italy #sicily #spatialanalysis #erosion #geology #engineeringgeology #naturaldisaster #sedimentation #deposition #ridge #morphology #geomorphology #geomorphometry #spatialanalysis #model #deposits #breccia #sediment #softsediment #geologichistory #seismology #geophysics #seismics #geophysical #pleistocene #hydrodynamic #model #water #hydrology

charts, photo & map - Ridge morphology

photo and 3D image/map - ridge outcrops

image - artistic interpretation of the flooding of the Mediterranean through the Strait of Gibraltar (A) and the Strait of Sicily (F) about 5.3 million years ago

seismic profiles and map - Buried erosional shelf channels upslope of Noto Canyon

Steve Dustcircle @dustcircle

How to #filter #sediment from muddy #water with a #papertowel and some cups

https://youtu.be/EhTzJUllxOg
https://boingboing.net/2025/01/22/how-to-filter-sediment-from-muddy-water-with-a-paper-towel-and-some-cups.html

YouTubeFiltering sediment from muddy water with a paper towel and some cupsBy Woodsbound Outdoors

Or M. Bialik @ombialik@mastodon.world

Life does not end at the #sediment-#water-interface, it keep going down and down and down (less so on land). There is a #diversity continuum, and some of those #subsurface #microbial communities can be rather diverse.
https://www.science.org/doi/10.1126/sciadv.adq0645

Observed archaeal and bacterial richness across environments based on 16S rRNA gene ASVs.
Archaeal (A) and bacterial (B) richness found in the 11 studied environments (n: number of included samples). Environments are grouped on the basis of biome (marine, terrestrial) and depth realm (surface, interface, subsurface). Note that Archaeal terrestrial water and sediment samples contain too few datapoints for robust visualization using boxplots, yet the plots were retained for completeness. NA, no value available. Total archaeal (C) and bacterial richness (D) using a subsampling approach to account for different group sizes (100 iterations using 1142 archaeal or 2271 bacterial reads, respectively). Normalized gamma diversity corroborates that archaeal diversity is highest in marine interface and subsurface ecosystems even when different group sizes are considered. All pairwise comparisons were significantly different (P < 0.001) except for those indicated with ns (not significant).

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