#igneous — Public Fediverse posts

Last night was our second lecture of the MSHI Volcano Naturalist program. The title of the lecture was Volcanos 101. The starting point was plate tectonics then burrowing into the regional setting. Then a focus on igneous rocks, petrology, minerology, geochemistry. It’s a complicated topic but was presented well. I can see it being very challenging and difficult to visualize for someone who has never had a class in geology. #geology #volcano #tectonics #Cascades #PNW #igneous

Last night was our second lecture of the MSHI Volcano Naturalist program. The title of the lecture was Volcanos 101. The starting point was plate tectonics then burrowing into the regional setting. Then a focus on igneous rocks, petrology, minerology, geochemistry. It’s a complicated topic but was presented well. I can see it being very challenging and difficult to visualize for someone who has never had a class in geology. #geology #volcano #tectonics #Cascades #PNW #igneous

Why Is The Federal Government Spending Millions On Aerial Geological Mapping In Southern Colorado?
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https://www.cpr.org/2025/11/19/geological-survey-earth-mri-colorado-minerals/ <-- shared media article
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https://www.usgs.gov/earth-mapping-resources-initiative-earth-mri <-- shared (USGS) Earth Mapping Resources Initiative (Earth MRI) entry page
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https://ngmdb.usgs.gov/emri/#3/40/-96 <-- shared Earth MRI web map(s)
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https://www.usgs.gov/centers/gggsc <-- shared USGS Geology, Geophysics, and Geochemistry Science Center entry page
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https://mrdata.usgs.gov/earthmri/data-acquisition/project.php?f=html&pid=1071 <-- shared USGS Colorado Alkaline Igneous Belt Survey report
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https://www.usgs.gov/programs/mineral-resources-program/science/what-are-critical-minerals-0 <-- shared final 2025 #DOI / #USGS report on list of critical minerals
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#geophysics #remotesensing #earthobservation #airborne #mapping #spatial #criticalminerals #colorado #geology #structuralgeology #Colorado #USA #EarthMRI #SouthernColorado #geologicdata #geologicmapping #geochemistry #igneous #survey #geophysicalsurvey #economic #economy #mineral #mineralresources
@CPR @USGS @NV5

Why Is The Federal Government Spending Millions On Aerial Geological Mapping In Southern Colorado?
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https://www.cpr.org/2025/11/19/geological-survey-earth-mri-colorado-minerals/ <-- shared media article
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https://www.usgs.gov/earth-mapping-resources-initiative-earth-mri <-- shared (USGS) Earth Mapping Resources Initiative (Earth MRI) entry page
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https://ngmdb.usgs.gov/emri/#3/40/-96 <-- shared Earth MRI web map(s)
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https://www.usgs.gov/centers/gggsc <-- shared USGS Geology, Geophysics, and Geochemistry Science Center entry page
--
https://mrdata.usgs.gov/earthmri/data-acquisition/project.php?f=html&pid=1071 <-- shared USGS Colorado Alkaline Igneous Belt Survey report
--
https://www.usgs.gov/programs/mineral-resources-program/science/what-are-critical-minerals-0 <-- shared final 2025 #DOI / #USGS report on list of critical minerals
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#geophysics #remotesensing #earthobservation #airborne #mapping #spatial #criticalminerals #colorado #geology #structuralgeology #Colorado #USA #EarthMRI #SouthernColorado #geologicdata #geologicmapping #geochemistry #igneous #survey #geophysicalsurvey #economic #economy #mineral #mineralresources
@CPR @USGS @NV5

The GEOROC Database (Geochemistry of Rocks of the Oceans and Continents)
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https://georoc.eu/georoc/new-start.asp <-- shared link to GEOROC resource
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H/T Paul Cleverley glasses curly blonde hair
“The GEOROC Database (Geochemistry of Rocks of the Oceans and Continents) is a comprehensive collection of published analyses of igneous and metamorphic rocks and minerals. It contains major and trace element concentrations, radiogenic and nonradiogenic isotope ratios as well as analytical ages for whole rocks, glasses, minerals and inclusions. Metadata include geospatial and other sample information, analytical details and references….
Current content of GEOROC:
• 22,750 papers
• 685,660 samples
• 2,680,100 analyses
• 39,334,100 single data values…”
#opendata #geology #geoscience #GEOROC #database #global #igneous #metamorphic #rocks #minerals #geochemistry #results #analyses #published #metadata #spatial #GIS #mapping #papers #samples #datavalues

The GEOROC Database (Geochemistry of Rocks of the Oceans and Continents)
--
https://georoc.eu/georoc/new-start.asp <-- shared link to GEOROC resource
--
H/T Paul Cleverley glasses curly blonde hair
“The GEOROC Database (Geochemistry of Rocks of the Oceans and Continents) is a comprehensive collection of published analyses of igneous and metamorphic rocks and minerals. It contains major and trace element concentrations, radiogenic and nonradiogenic isotope ratios as well as analytical ages for whole rocks, glasses, minerals and inclusions. Metadata include geospatial and other sample information, analytical details and references….
Current content of GEOROC:
• 22,750 papers
• 685,660 samples
• 2,680,100 analyses
• 39,334,100 single data values…”
#opendata #geology #geoscience #GEOROC #database #global #igneous #metamorphic #rocks #minerals #geochemistry #results #analyses #published #metadata #spatial #GIS #mapping #papers #samples #datavalues

Scientists Unveil Mysterious Origins Of Earth’s Largest Igneous Rocks
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https://scitechdaily.com/scientists-unveil-mysterious-origins-of-earths-largest-igneous-rocks/ <-- shared technical article
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https://doi.org/10.1126/sciadv.adn3976 <-- shared paper
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#GIS #spatial #mapping #spatialanalysis #spatiotemporal #geology #structuralgeology #earth #global #igneous #vulcanism #massif #anorthosite #origin #formation #morphology #platetectonics #subduction #crust #mantle #Grenvilleorogen #orogeny #geochemistry #mineralogy #magma #oceaniccrust #model #modeling #petrogensis

Scientists Unveil Mysterious Origins Of Earth’s Largest Igneous Rocks
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https://scitechdaily.com/scientists-unveil-mysterious-origins-of-earths-largest-igneous-rocks/ <-- shared technical article
--
https://doi.org/10.1126/sciadv.adn3976 <-- shared paper
--
#GIS #spatial #mapping #spatialanalysis #spatiotemporal #geology #structuralgeology #earth #global #igneous #vulcanism #massif #anorthosite #origin #formation #morphology #platetectonics #subduction #crust #mantle #Grenvilleorogen #orogeny #geochemistry #mineralogy #magma #oceaniccrust #model #modeling #petrogensis

My two minor obsessions captured at the same moment. Here are pictures of my favourite bicycle, an old school build using a custom #DaveYates frame, resting against my favourite rock, a beautifully smooth #glacial erratic composed of a very hard, fine grained, mid grey #igneous rock with pale mm-cm sized plagioclase phenocrysts. Generations of bottoms have enhanced the glacial smoothing 🙂. Located in #MaxwellPark #Glasgow #geology #cycling

My two minor obsessions captured at the same moment. Here are pictures of my favourite bicycle, an old school build using a custom #DaveYates frame, resting against my favourite rock, a beautifully smooth #glacial erratic composed of a very hard, fine grained, mid grey #igneous rock with pale mm-cm sized plagioclase phenocrysts. Generations of bottoms have enhanced the glacial smoothing 🙂. Located in #MaxwellPark #Glasgow #geology #cycling

Magma And Mountain Building At The Columbia River Gorge
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https://www.earthscope.org/news/magma-and-mountain-building-at-the-columbia-river-gorge/ <-- shared technical article
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https://doi.org/10.1126/sciadv.adj3357 <-- shared paper
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#GIS #spatial #mapping #remotesensing #GPS #geophysics #subductionzone #plateboundary #PNW #Oregon #columbiariver #geology #structuralgeology #model #modeling #vulcanism #volcanic #magma #fieldwork #igneous #platetectonics #uplift #compression #extension #geologicmapping #geologic #orogeny #mountains #mountainbuilding

Magma And Mountain Building At The Columbia River Gorge
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https://www.earthscope.org/news/magma-and-mountain-building-at-the-columbia-river-gorge/ <-- shared technical article
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https://doi.org/10.1126/sciadv.adj3357 <-- shared paper
--
#GIS #spatial #mapping #remotesensing #GPS #geophysics #subductionzone #plateboundary #PNW #Oregon #columbiariver #geology #structuralgeology #model #modeling #vulcanism #volcanic #magma #fieldwork #igneous #platetectonics #uplift #compression #extension #geologicmapping #geologic #orogeny #mountains #mountainbuilding

Reconnaissance Basement Geology and Tectonics of South Zealandia
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https://doi.org/10.1029/2018TC005116 <-- shared paper
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#GIS #spatial #mapping #geology #structuralgeology #geologicmapping #NewZealand #Zealandia #remotesensing #magnetic #reconnaissance #basement #tectonics #SouthZealandia #igneous #batholith #magneticanomaly #continent #seafloor #bathymetry #orogeny #gondwana ##gondwanaland #sampling #hikurangi #forearcbasin #forearc #boreholes #dredging #faulting #faults #gravity #seismic #seismology #renunitegondwanaland #geophysics

Reconnaissance Basement Geology and Tectonics of South Zealandia
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https://doi.org/10.1029/2018TC005116 <-- shared paper
--
#GIS #spatial #mapping #geology #structuralgeology #geologicmapping #NewZealand #Zealandia #remotesensing #magnetic #reconnaissance #basement #tectonics #SouthZealandia #igneous #batholith #magneticanomaly #continent #seafloor #bathymetry #orogeny #gondwana ##gondwanaland #sampling #hikurangi #forearcbasin #forearc #boreholes #dredging #faulting #faults #gravity #seismic #seismology #renunitegondwanaland #geophysics

Twinned #feldspar crystals
In a paving stone in #Exeter, United Kingdom, pound coin for scale.
Must have cooled slowly, allowing large crystals to grow, so #intrusive, not #extrusive / #volcanic.
My #photo of an #igneous #mineral because I like #geology

Twinned #feldspar crystals
In a paving stone in #Exeter, United Kingdom, pound coin for scale.
Must have cooled slowly, allowing large crystals to grow, so #intrusive, not #extrusive / #volcanic.
My #photo of an #igneous #mineral because I like #geology

Geoscientists Discover Massive Undersea Water Reservoir Off New Zealand’s Coast
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https://www.sci.news/othersciences/geophysics/hikurangi-water-reservoir-12323.html <-- shared technical article
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https://doi.org/10.1126/sciadv.adh0150 <-- shared paper
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#GIS #spatial #mapping #remotesensing #geology #structuralgeology #NewZealand #model #modeling #megathrust #fault #faulting #subduction #water #groundwater #Hikurangi #hydrogeology #igneous #vulcanism #volcaniclastic #seamounts #marine #bathymetry #seafloor #volcanicplateau #subductionzone #seismicimaging #seismic #earthquake #slowslip #tectonics #geoscience

Geoscientists Discover Massive Undersea Water Reservoir Off New Zealand’s Coast
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https://www.sci.news/othersciences/geophysics/hikurangi-water-reservoir-12323.html <-- shared technical article
--
https://doi.org/10.1126/sciadv.adh0150 <-- shared paper
--
#GIS #spatial #mapping #remotesensing #geology #structuralgeology #NewZealand #model #modeling #megathrust #fault #faulting #subduction #water #groundwater #Hikurangi #hydrogeology #igneous #vulcanism #volcaniclastic #seamounts #marine #bathymetry #seafloor #volcanicplateau #subductionzone #seismicimaging #seismic #earthquake #slowslip #tectonics #geoscience

Some #DogWalkingGeology from last week. Spud is pointing out some nice layered gabbro-melatroctolite from the Ben Buie Complex in SE Mull. 😊 #Geology #Igneous

Interesting #boulders in a roughly stacked #seawall
The southern part of the spit separating #Plymouth Harbor from Plymouth Bay has a seawall along the outer shore, above Plymouth #LongBeach. Without knowing where they came from, interpreting the boulders is sketchy. BUT nice coarse crystals in intrusions into #felsic rocks, including big #quartz chunks (top right photo) and blades of #biotite (bottom right).
#Massachusetts #igneous #geology #intrusion #pegmatite #NewEngland #dike #rock #beach

Interesting #boulders in a roughly stacked #seawall
The southern part of the spit separating #Plymouth Harbor from Plymouth Bay has a seawall along the outer shore, above Plymouth #LongBeach. Without knowing where they came from, interpreting the boulders is sketchy. BUT nice coarse crystals in intrusions into #felsic rocks, including big #quartz chunks (top right photo) and blades of #biotite (bottom right).
#Massachusetts #igneous #geology #intrusion #pegmatite #NewEngland #dike #rock #beach

Above and upon #igneous #dikes

The feature sure looked like a #dike on #satellite view, and a ground check confirmed it. Probably a late #Triassic or early #Jurassic intrusion into #Proterozoic Dedham #Granite, as #Pangea rifted. At Black Rock #Beach, #Hingham, #Massachusetts, #NewEngland #geology USA.

Satellite view from #AppleMaps, #photo by me.

Above and upon #igneous #dikes

The feature sure looked like a #dike on #satellite view, and a ground check confirmed it. Probably a late #Triassic or early #Jurassic intrusion into #Proterozoic Dedham #Granite, as #Pangea rifted. At Black Rock #Beach, #Hingham, #Massachusetts, #NewEngland #geology USA.

Satellite view from #AppleMaps, #photo by me.

Have you enjoyed this trip down #Igneous #Petrology Lane? If so, please throw your vote to #Sodalite, a wonderful #Mineral that has been very special to me! #MinCup23 #MinCup2023
Go #TeamSodalite!
https://www.mineralcup.org/2023/campaigns/round-1-match-4

Have you enjoyed this trip down #Igneous #Petrology Lane? If so, please throw your vote to #Sodalite, a wonderful #Mineral that has been very special to me! #MinCup23 #MinCup2023
Go #TeamSodalite!
https://www.mineralcup.org/2023/campaigns/round-1-match-4

Two ways here to tell which igneous rock is older 1. the younger one includes bits of the older one, and 2. The younger one is chilled to a very fine-grained margin against the older, colder one. 🤓 Dark basalt in contact with gabbro, Ben Buie complex, central Mull, this afternoon. #Geology #Igneous #Mull

Two ways here to tell which igneous rock is older 1. the younger one includes bits of the older one, and 2. The younger one is chilled to a very fine-grained margin against the older, colder one. 🤓 Dark basalt in contact with gabbro, Ben Buie complex, central Mull, this afternoon. #Geology #Igneous #Mull

I’m on my way back home from the Maritimes. Here’s a shot of Grand Falls in New Brunswick. What an incredible bit of white water and geological prehistory. #waterfall #gorge #NewBrunswick #GrandFalls #geology #Stratified #igneous

I’m on my way back home from the Maritimes. Here’s a shot of Grand Falls in New Brunswick. What an incredible bit of white water and geological prehistory. #waterfall #gorge #NewBrunswick #GrandFalls #geology #Stratified #igneous

Interesting Earth-like🌍 geology on Moon🌔 : Large area of hot, high uranium + thorium rocks on far side of Moon likely to be large complex of remelted and/or fractionated igneous rocks, such as granites. Only broken fragments of such rocks found on Moon thus far. https://www.nature.com/articles/s41586-023-06183-5 #LunarGeology #Geology #Granite #Igneous

Interesting Earth-like🌍 geology on Moon🌔 : Large area of hot, high uranium + thorium rocks on far side of Moon likely to be large complex of remelted and/or fractionated igneous rocks, such as granites. Only broken fragments of such rocks found on Moon thus far. https://www.nature.com/articles/s41586-023-06183-5 #LunarGeology #Geology #Granite #Igneous

📢 📢👇👇 One of world's greatest geological maps will be 100 this year🎂! @geologymull and I are organising some local celebrations in Mull in September as part of this year's Scottish Geology Festival @palaeokatie More here: https://www.antobarandmulltheatre.co.uk/whats-on/j44grv4ddf8cj4a4a10lza9sdx9qyh
#Mull
#ScottishGeologyFestival
#Maps
#Geology
#Igneous

Rock on the beach at Barnum Point, Camano Island, WA. Looks like a granodiorite peppered with xenoliths. Igneous petrologists chime in. Likely weathered out of the till that caps the bluffs or a dropstone from floating ice on marine water incursion during the Everson interstade. Source rock provenance not known. Ref. Geologic map of the Juniper Beach 7.5-minute quadrangle, WDGER Geologic Map GM70. #geology #igneous #xenolith #iceage #glaciation #intrusive #PNW #washingtonstate #CamanoIsland