"Tonga volcano triggered seafloor debris stampede"

"Last year's Tonga volcanic eruption produced the fastest underwater flows ever recorded, scientists say.

Huge volumes of rock, ash and mud were clocked moving across the ocean floor at speeds of up to 122km/h (75mph)."

#geology #volcanism

https://www.bbc.co.uk/news/science-environment-66731845

This Monday was particularly Monday-ish, so choosing to transport myself instead to Eigg and the beautiful weirdness of An Sgùrr, viewed here end on.

TIL 'inselberg': an isolated rock, rising abruptly out of the surrounding landscape. A loan-word from German - an 'island mountain'.

#geology #Scotland #landscape #escapism

For the #SciArtSeptember theme “lyrical” I’m going with the use of imagination & analogy in the exploration & communication of science through thought-experiments like Lyell’s Amphibious Being! In geologist Charles Lyell (1797-1875)’s famous ‘Principles of Geology,’ he wrote that to avoid some sources of prejudice in understanding #geology would require an Amphibious Being, 🧵1/n

#linocut #printmaking #histstm #SciArtSeptember #amphibian #PhilosophyOfScience #EarthScience #geologist #MastoArt

September 11, 1522, birthday of Italian naturalist Ulisse Aldrovandi. He studied & classified fossils, rocks & minerals and used the word "la giologia" - #geology - for the very first time ⚒

http://bressan-geoconsult.eu/the-origin-of-geology/

Nice weather this morning at Redwood National and State Parks. Check the “Current Conditions” page on the NPS website for information and updates regarding fires, air quality, trails, roads, and other topics: https://www.nps.gov/redw/planyourvisit/conditions.htm Learn more at https://www.nps.gov/redw/index.htm and #nps #nationalparks #ocean #publiclands #photography #cawx #geology Image credit Kurt Angersbach / Westernlabs

On our way to Wallowa Lake in Eastern #Oregon, we stopped at Painted Hills in the John Day Fossil Beds National Monument area. If you are into #geology this is a wonderful and educational stop. Canon 6D Mark II, 16-35mm L zoom.

#nature #photography

Mont Gerbier-de-Jonc · Monts d’Ardèche · France

This summit is an extinct #volcanic cone standing out a plateau. Here’s also where the #Loire arises, France’s longest river. It is a pleasure to climb the last 200 meters to the summit, as every footstep sounds a bit. The name of the rock, #phonolite, has its origin in the bright sound it gives when hit. The photo was taken about 5 yrs back.

#Phonolith #LandscapePhotography #Photography #Fotografie #Fels #Rock #Geology #Geologie

Leerzame activiteiten voor jong en oud
Iedere maand worden bijeenkomsten georganiseerd door de Nederlands Geologische vereniging Afdeling Limburg in Museum Valkenburg. Iedereen kan hieraan deelnemen en kennis maken met Geologie.
○ Lees meer op: https://www.museumvalkenburg.nl/nieuws/leerzame-activiteiten-voor-jong-en-oud/?feed_id=996
#museumvalkenburg #valkenburg #valkenburgaandegeul #kunst #historie #archeologie #geologie #art #history #archeology #geology #museum #Geologie

A small #outcrop of the #Squantum Member of the #Roxbury #Conglomerate

These #rocks are in the #BostonBay Group, which is currently dated to #Neoproterozoic. The Squantum Member was interpreted as a #tillite, possibly associated with the #Gaskiers #glaciation, although there a scant signs like scratched pebbles or faceted cobbles. It is currently commonly interpreted as a #debrite (debris flow). Details in captions.
#geology #glacier #turbidite #Quincy #Boston #Massachusetts #NewEngland

@Jason844 I do enjoy the bonus part #nickzentner #geology

The lava dome inside the summit crater of the Great Sitkin volcano in the Aleutian Islands, as seen from a helicopter carrying Alaska Volcano Observatory geologists to the summit to take samples. Image looks to the west, with Adak and Kanaga islands visible on the horizon. Photo was taken on September 3, 2023.

Photo: M. Loewen USGS/AVO

#volcanoes #Alaska #GreatSitkin #AleutianIslands #geology

And this is the published article with more of the #geology details on their proposed model for the lithium enrichment of the caldera lake sediments https://www.science.org/doi/10.1126/sciadv.adh8183

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, interpretation is sketchy. But nice coarse crystals in intrusions into #felsic rocks, including big #quartz chunks (top left photo) and blades of #biotite (bottom left). #Massachusetts #igneous #geology #intrusion #pegmatite #granite #NewEngland #dike #rock #beach

Apple Maps image of area, my #photos #Fujifilm #xe2 #Massachusetts #NewEngland #beach #igneous #geology #granite #intrusive #rock

"Earthquake shakes Fall River Mills and Burney area" by @KRCR7 Redding - #Quake reported felt in several far-northern California counties, and in Oregon and Nevada https://krcrtv.com/news/local/earthquake-shakes-fall-river-mills-and-burney-area-friday-morning #earthquake #geology

M5.0 #quake near Fall River Mills in rural northeastern California mountains. No reports of damage or injury yet - but reports may take time in areas with no cell phone coverage. https://earthquake.usgs.gov/earthquakes/eventpage/nc73934641/executive #earthquake #geology

@dlw @silicatefondue

ok i was thinking about related topic the other day. the mantle is ~4000/2/3 =700 times the volume of earths oceans. mantle minerals ought to be able to incorporate water to make new minerals.

why is there an ocean at all?

its existence seems prearious.

did rock suck up the oceans on mars and venus or did they loose oceans to photolysis of H2O or both?
#geology #planetaryScience #MInCup23

Are the oceans leaky bathtubs? #Lawsonite is partially responsible! 20% of the ocean's water may lave drained into the deep mantle over the last billion years.*

Don't blame Canada! The Cascade subduction zone is too warm. #MinCup23 #Geology #Minerals #WaterCycle

* Korenaga, Planavsky, & Evans (2017) Phil. Trans. A.

Tourists have been visiting a ‘lost continent’ without even knowing | indy100
https://www.indy100.com/science-tech/lost-continent-holiday-greater-adria-2665078289

#GreaterAdria
#LostContinent
#Zealandia
#TeRiuAMaui
#Geology
#Zealandiais
#Gondwana
#ZealandCrownResearchInstituteGNSScience