Create accountLogin

Recent searches

No recent searches

Search options

Not available on dice.camp.
dice.camp is one of the many independent Mastodon servers you can use to participate in the fediverse.
A Mastodon server for RPG folks to hang out and talk. Not owned by a billionaire.

Administered by:

Server stats:

1.8K
active users

dice.camp: AboutProfiles directoryPrivacy policy

Mastodon: AboutGet the appKeyboard shortcutsView source codev4.3.7

#geomorphology

1 post1 participant0 posts today
Public
💧🌏 Greg Cocks

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

Public *
💧🌏 Greg Cocks

Multispectral Remote Sensing Expression of Lineaments and Alteration Minerals in Part of Crystalline Rock Units of Southwestern Nigeria - Implication on Gold Prospecting
--
doi.org/10.1016/j.oreoa.2025.1 <-- shared paper
--
#GIS #spatial #mapping #ASTER #Gold #Hydrothermal #HydrothermalAlteration #Lineament #Landsat #ETM #EnhancedThematicMapper #phyllic #Ilesha #schist #belt #geology #mining #Nigeria #naturalresources #mineral #mineralresources #golddeposits #aerogeophysical #remotesensing #geophysical #spatialanalysis #geomorphology #geomorphometry #alteration #propylitic #argillic #mineralogy #XRD #structuralgeology #lithology #PrincipalComponentAnalysis #PCA #prospecting #fracture #joints #faulting #Multispectral #Lineaments #Crystalline

aerial oblique image - existing gold mine, Nigeria
geology/geomorphology map - Showing VES Positions Overlay on Mineral Prospective Map
(a) Lineament Map of the Study Area (b) Lineament Density Map of the Study Area (c) Superposition of Lineament on Geology Map of the Study Area
maps of remote sensing data - (a) Composite (RGB) 7, 5, 2 Image of the Study Area (b) Composite (RGB) 3, 2, 1 Image of the Study Area (c) Composite (RGB) 4, 3, 1 Image of the Study Area (d) Composite (RGB) 3, 2, 1 Image of the Study Area
Public
💧🌏 Greg Cocks

Scientists Uncover Evidence Of A Colossal MegaFlood That Refilled The Mediterranean Sea
--
scitechdaily.com/scientists-un <-- shared technical article
--
doi.org/10.1038/s43247-024-019 <-- 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
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
Public *
💧🌏 Greg Cocks

Edge Of Mars’ Great Dichotomy Eroded Back By Hundreds Of Kilometres
--
arstechnica.com/science/2025/0 <-- shared technical article
--
dx.doi.org/10.1038/s41561-024- <-- shared paper
--
#GIS #spatial #mapping #planet #Mars #remotesensing #imagery #landsurface #geology #topography #astrogeology #elevation #morphology #martian #geography #marsdichotomy #plateau #lowlands #model #3dmodel #basin #highlands #shoreline #ocean #crust #structuralgeology #chemostratigraphy #morphostratigraphy #geomorphometry #geomorphology #water #hydrology #CaSSIS #HiRISE #stratigraphy #strata #MOLA #laser #LiDAR #MawrthVallis #crater #mound #profile #crosssection #geochemistry #mineralogy #CRISM #CTX #HRSC #DTM #erosion #weathering #spatialanalysis #spatiotemporal

images - Morphological similarities between the stratigraphy in the mounds and the Mawrth Vallis plateau region
3D model, map, images and charts - Chemostratigraphy and morphostratigraphy of a well-exposed mound
3D map and cross section - Three-dimensional view of study area with stacked elevation profiles
image/map - the topography of Mars by the Mars Orbital Laser Altimeter (MOLA)
Public *
💧🌏 Greg Cocks

I have been digging out my old copies of John McPhee's #books, dipping in, remembering what it was like to be a new #geologist, and how it has carried across into #spatial #data, #geomorphology, #geomorphometry, #hydrology, #landcover, #engineeringgeology, #environmentalscience, #landuse, #massmovement and so much more......
This one paragraph reminded me so strongly of that time,, although I cannot of course write as eloquently:
--
"I used to sit in class and listen to the terms come floating down the room like paper airplanes. Geology was called a descriptive science, and with its pitted outwash plains and drowned rivers, its hanging tributaries and starved coastlines, it was nothing if not descriptive. It was a fountain of metaphor—of isostatic adjustments and degraded channels, of angular unconformities and shifting divides, of rootless mountains and bitter lakes..."
#GIS #JohnMcPhee #science #scientificwriting #readingforpleasure #geology #water #landforms #spatialanalysis #spatiotemporal

Book cover - Basin & Range, John McPhee
Public
💧🌏 Greg Cocks

Postfire Debris-Flow Hazards
--
usgs.gov/programs/landslide-ha <-- shared technical article / overview
--
alturl.com/po3yj <-- USGS Post-Fire Debris Flow Hazard Assessment Viewer
--
earthquake.usgs.gov/arcgis/res <-- Post-Fire Debris-Flow Hazards USGS spatial data / GIS Services
--
#GIS #spatial #mapping #USGS #LandslideHazardsProgram #NaturalHazards #3DEP #NGP #NationalGeospatialProgram #GIRT #GeospatialInformationResponseTeam #GIS #geology #hydrospatial #hydrology #landslides #debrisflows #fires #postfire #lidar #elevationdata #hazardassessments #preparedness #massmovement #engineeringgeology #risk #hazards #impacts #cost #economics #geomorphology #geomorphometry #spatialanalysis #spatiotemporal #remotesensing #soil #model #modeling #LosAngeles #LA #LosAngelesfires #California #wildfires #opendata
@USGS

photo - A home damaged by the January 9, 2018 debris flow event in Montecito, California. The event was triggered by heavy rain on the Thomas Fire burn area above Montecito. This home is located near Buena Vista Creek.
screen shot centered on LA - USGS Post-Fire Debris Flow Hazard Assessment Viewer (web map)
photo - Debris Flow in Cable Canyon following the 2003 Old Fire in the San Bernardino Mountains, California
photo - Post-fire debris flow depositing ash and sediment on a steep hillside, 2021 Dixie Fire in northern CA
Public *
💧🌏 Greg Cocks

'Some (TopoBathy) Floodplain Images I Made A Few Years Ago, On The Mississippi R.
--
These are some (topobathy) floodplain images I made a few years ago for a specific usecase – and ‘stumbled’ across them again today, lookin’ for something else…
Every time I look at such things, the (engineering) geologist, geomorphologist, (pseudo) hydrologist, spatial data scientist in me is made happy in being reminded what access we have to (often open) spatial data and the sheer volume of it, and the use cases for which it can be leveraged.
We are lucky professionals…
#GIS #spatial #mapping #alldataisspatial #remotesensing #geomorphology #hydrology #water #floodplain #usecase #opendata #LiDAR #geology #geomorphometry #spatialdata #happyprofessional #MississippiRiver #JALBTCX

Public *
Bruce MacDonald

Work to stabilise the expanding sinkhole in Merthyr Tydfil is ongoing as Wales prepares itself for a weekend of storms.

Cranes have been brought in to stabilise the chasm on Nant Morlais in Pant, Merthyr Tydfil, which emerged on Sunday.

It has now grown to about 17ft (5.2m) wide and is believed to be as deep as 50ft (15.2m).

Footage from drones flying over the street show the Nant Morlais stream flowing through the gap.
bbc.com/news/videos/cqx8wx7l45

www.bbc.comMerthyr Tydfil: Work ongoing to stabilise expanding sinkholeCranes have been brought in to stabilise the chasm, now 17ft (5.2m) wide.
#geomorphology
Public *
💧🌏 Greg Cocks

Vortex Trapping Of Suspended Sand Grains Over Ripples
--
doi.org/10.1029/2023JF007620 <-- shared paper
--
“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, 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

Illustration of the vortex core (blue arrows) distinct from the boundary shear and background turbulence (gray arrows) along the sand ripple. The black streamline indicates the freestream flow direction at this time step while the vortex is developing along the ripple slope. The double-headed arrow indicates that the free-stream velocity is oscillatory.
photo - experimental setup of particle image and tracking velocimetry system in the Small-Oscillatory Flow Tunnel at the United States Naval Research Laboratory at Stennis Space Center, Mississippi, United States of America. Three high-speed cameras and a downward-looking Neodymium-doped yttrium aluminum garnet (Nd:YAG) laser were aimed at the test section of the rippled sand bed.
charts / figures - Vorticity and grain trajectories. (a) Freestream horizontal velocity with time steps of snapshots indicated. Instantaneous velocities are overlaid on vorticity ((b)–(g)), shown at every fourth vector, with scale vector and the brown line delineating the ripple shown. Trajectories of some vortex-trapped sediment grains are highlighted with start and end times indicated by matching triangle and square symbols in (a). Times for the semi-circular paths are indicated with circle markers. Gray circles estimate regions of highest fluid vorticity, with direction of the fluid parcels indicated by gray arrows, and quadrants of the vortex outlined.
photo - sand waves / ripples formed on the shores of Broad Bay at First Landing State Park, Virginia, USA
Public
The Inquisitive Biologist

This week's #NewBooks at the library: I chanced upon a very affordable copy of Atlas of Submarine Glacial Landforms from the #GeologicalSociety. A rare Dutch addition this week is De Thigmofiel by one of my favourite Dutch biologists, #MidasDekkers. Lastly, I offered sanctuary to a damaged copy of #Evolution and Fossil Record of African #Proboscidea from CRC Press

#Books #Scicomm #Bookstodon #Geomorphology #Glaciers #Cryosphere #Paleontology #Fossils #Elephants @bookstodon

A top-down photo of three books lying on a small, brown, wooden table. On the left, tilted slightly to the left, is a large book: Atlas of Submarine Glacial Lanforms, showing a landscape of icebergs on its cover. In the middle, oriented straight, is a Dutch book called De Thigmofield by author Midas Dekkers, showing a photos of the head of a contented-looking cat, eyes closed, peeping out from the top of a cardboard box. On the right, tilted slightly to the right, is Evolution and Fossil Record of African Proboscidea, showing a painting of a herd of golden-brown elephants walking towards the viewer.
Public *
💧🌏 Greg Cocks

Daniel Coe’s Astonishing River Cartography
--
orionmagazine.org/article/dani <-- shared media article
--
dancoecarto.com/work <-- his website
--
[those in the spatial hydrology ‘world’ have long been incredibly impressed by Dan Coe’s imagery and cartography, here is a wonderful article on cartography & science with his visual arts quality]
“Cartographer Daniel Coe uses relative elevation data, primarily from plane-mounted lasers called lidar, to visualize Earth’s natural features, like rivers and floodplains. His stunning river maps reveal stories hidden in historical sediment and past channels carved by the water, as it twists and turns through both landscape and time…”
#GIS #spatial #mapping #DanielCoe #cartography #hydrospatial #river #riverine #imagery #representation #map #representation #science #remotesensing #LiDAR #sedimentation #flooding #riverchannel #change #spatiotemporal #gischat
#DanielCoe #fluvial #geomorphology

LiDAR-derived river cartography - Mississippi Delta, USA
LiDAR-derived river cartography - Murray River, Australia
LiDAR-derived river cartography - bends in the North Fork Shenandoah River, Virginia, USA
LiDAR-derived river cartography - Tulsequah River, British Columbia, Canada
ExploreLive feeds
About