#sediment - Veganism Social

Recent searches

Search options

Only available when logged in.

2 posts2 participants0 posts today

John Vaccaro (johniac) @johniac@mastodon.social

SciTech Chronicles. . . . . . . . .April 2nd, 2025

https://bit.ly/stc040225

bit.lySciTech Chronicles. . . . . . . . .April 2nd, 2025A Focus on Security Yields Compliance for Free. Vol II No 2 339 links Curated Map of the aging brain reveals vulnerable cell types and regio...

#brain #genes #hypothalamus

Greg Cocks @GregCocks@techhub.social

Fluvial System Block Diagrams
--
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@mastodon.social

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

ALT

Voyage Énergétique @emilie25@mastodon.social

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

ALT

Greg Cocks @GregCocks@techhub.social

Coastal Environments - LiDAR Mapping of Copper Tailings Impacts, Particle Retention of Copper, Leaching, and Toxicity
--
https://doi.org/10.3390/rs17050922 <-- shared paper
--
#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

ALT

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

ALT

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.

ALT

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.

ALT

Greg Cocks @GregCocks@techhub.social

Ecological Restoration In The Yellow River Basin Enhances Hydropower Potential
--
https://doi.org/10.1038/s41467-025-57891-7 <-- shared paper
--
#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

ALT

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

ALT

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

ALT

photo - annual cleaning of the Xiaolangdi Dam

ALT

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
--
https://phys.org/news/2025-02-seismometers-reveal-earth-longest-runout.html <-- shared technical article
--
https://doi.org/10.1038/s43247-025-02137-z <-- shared paper
--
https://doi.org/10.1016/j.geomorph.2024.109350 <-- shared paper
--
https://doi.org/10.1038/s41561-022-01017-x <-- shared paper
--
#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

ALT

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.

ALT

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

ALT

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

ALT

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

Geoscientists discover evidence of earliest human-caused lead contamination in ancient Greece

ALT

Greg Cocks @GregCocks@techhub.social

Evidenced Paleodrainages In Desert Regions Of Saudi Arabia - Satellite Images With Field-Based Study
--
https://doi.org/10.21203/rs.3.rs-4959129/v1 <-- shared paper
--
#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

ALT

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.

ALT

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

ALT

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

ALT

Greg Cocks @GregCocks@techhub.social

Scientists Uncover Evidence Of A Colossal MegaFlood That Refilled The Mediterranean Sea
--
https://scitechdaily.com/scientists-uncover-evidence-of-a-colossal-megaflood-that-refilled-the-mediterranean-sea/ <-- shared technical article
--
https://doi.org/10.1038/s43247-024-01972-w <-- shared paper
--
#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

ALT

photo and 3D image/map - ridge outcrops

ALT

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

ALT

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

ALT

Steve Dustcircle @dustcircle@mastodon.social

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).

ALT

Or M. Bialik @ombialik@mastodon.world

The thing about early alteration of grains in the #sediment, is that there are a lot of things living there. So, while #chemistry is what's working on the fundamental level, #microbiology is a critical mediating factor.
https://www.nature.com/articles/s41598-024-84407-y

Schematic representing the three modes of alteration observed in the sediment grains when exposed to bacteria (V. marismortui and H. meridiana) for an extended period. Arrow going from left (start) to right) showing precipitation of mineral envelopes with higher Mg/Ca ratio and lower d13C value.

ALT

Greg Cocks @GregCocks@techhub.social

(Radiometric-Derived) Sediment Susceptibility For The Te Hoiere Pelorus Catchment [New Zealand]
--
http://alturl.com/hxbvg <-- shared technical report
--
http://alturl.com/xkgsv <-- shared related technical article
--
[reminded so much of the engineering geology work I did in my thesis in New Zealand]
#GIS #spatial #mapping #remotesensing #AGRS #gammaray #spectroscopy #engineeringgeology #risk #hazard #massmovement #landslide #rainfall #precipitation #watershed #TeHoiere #Pelorus #Catchment #NewZealand #waterquality #waterresources #water #hydrology #geology #soil #regolith #topography #slope #aspect #spatialanalysis #landuse #humanimpacts #masswasting #erosion #sediment #sedimentation #radiometrics #LiDAR #spatialtools
@TeHoiere

photo - portion of the Pelorus Catchment, Marlborough, New Zealand

ALT

map - Airborne Gamma-Ray Spectroscopy (AGRS) ternary for the Nelson and Marlborough regions. Ternary is produced by variable mixing of K, eTh and eU. Data from New Zealand Petroleum and Minerals. The shade model underlying the radiometric extent shows the extent of LiDAR coverage for the Nelson and Marlborough regions.

ALT

maps - Priority Class as defined by landscape susceptibility and land use intensity.

ALT

map | table - Landscape susceptibility for the Te Hoiere catchment by depositional and erosional domain. Landscape susceptibility is infered from DOSE normalised against QMAP rock class and TRI. Note: Map symbolised by attribute field ‘DomainDN’ and ‘LAND_SUS’ (or ‘LS_Class’) | Mean statistics for susceptibility classes.

ALT

Or M. Bialik @ombialik@mastodon.world

A shout out to my former student Muhedeen Lawal for the first paper out of their postdoc, taking the methods he developed in his PhD and applying them to understand how gas rises through the #sediment to the #seafloor in the Gulf of Mexico.
https://doi.org/10.1016/j.marpetgeo.2024.107270

ALT

Greg Cocks @GregCocks@techhub.social

New USGS Dataset Uncovers The Santiam River’s Underwater Topography To Aid In Fish Habitat And Water Flow Management
--
https://www.usgs.gov/news/national-news-release/new-usgs-dataset-uncovers-santiam-rivers-underwater-topography-aid-fish <-- shared article
--
https://apps.nationalmap.gov/lidar-explorer/#/ <-- USGS 3DEP LiDAR Explorer (open data)
--
#GIS #spatial #mapping #remotesensing #LiDAR #topobathymetry #topobathy #example #usecase #wildfires #rivermanagement #climatechange #waterresources #SantiamRiver #Oregon #KlamathRiver #PotomacRiver #ColoradoRiver #USGS #USACE #3DEP #opendata #topography #elevation #3DTNM #water #hydrology #hydrospatial #pilotproject #prototype #infrastructure #navigation #engineering #riverbed #sediment #sedimentation #habitat #river #waterbody #flowmanagement #dams #salmon #steelhead #fish #WillametteValley #flood #flooding #risk #hazard #model #modeling #FIM #watersupply #agriculture
@USGS @USACE

screen shot - 3DEP LiDAR Explorer - Santiam River, OR's topobathy dataset(s)

ALT

imagery - Topobathymetric digital elevation model of the Santiam River in the Willamette Valley southeast of Salem, Oregon. The trees and dry land are shown as a lidar point cloud colored based on aerial imagery.

ALT

drone photo - oblique - The North Santiam drains from the Cascade Range and through the Willamette Valley foothills where it combines with the South Santiam before joining the Willamette River near Salem. The river in this section has numerous gravel bars and secondary channels and is flanked by agricultural lands and floodplain forests.

ALT

map - Topobathymetric digital elevation model of the Santiam River in the Willamette Valley southeast of Salem, Oregon.

ALT

Greg Cocks @GregCocks@techhub.social

The Great Mediterranean Drain - How 70% Of Its Water Vanished In A Geological Crisis [sic]
--
https://scitechdaily.com/the-great-mediterranean-drain-how-70-of-its-water-vanished-in-a-geological-crisis/ <-- shared technical article
--
https://doi.org/10.1038/s41467-024-53781-6 <-- shared paper
--
#GIS #spatial #mapping #model #modeling #spatialanalysis #spatiotemporal #Mediterranean #MediterraneanSea #MessinianSalinityCrisis #geologicalevent #geology #salinity #water #waterquality #impacts #salt #deposition #sediment #Atlantic #brine #evaporation #sealevel #isostatic #climatechange #geologichistory #chlorine #isotopes #halite

graphic - Artistic representation of the Gibraltar sill rupture at the end of the Messinian Salinity Crisis. In the final moments of this crisis, the level of the Mediterranean Sea was around 1 km lower than that of the Atlantic Ocean.

ALT

cross-section/schematics - Modes of halite accumulation during the Messinian Salinity Crisis deduced from chlorine isotopes of halite and geochemical modeling presented in this work

ALT

charts / schematic cross-sections - Results of the standard model run in the western (orange dashed line) and eastern (solid blue line) Mediterranean basins

ALT

maps and cross-sections - The Messinian Salt Giant of the Mediterranean sea

ALT

Drag & drop to upload