#andesitic
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geologica-acta.bsky.social
New published manuscript: Reactivation of Variscan subduction-modified mantle during Middle Triassic rifting: Insights from andesitic pyroclastics of northern Adriatic passive margin (Mt. Žumberak, NW Croatia) by Slovenec et al.
Link: revistes.ub.edu/index.php/GE...
Fine-grained lithic-vitric andesite tuff (sample BZ-20) N+
October 30, 2026 at 8:06 AM
volcanodiscovery.com
Photo of the Day: Columnar jointed andesitic lavas on Glaronisi Islets near Milos, Greece
Photo of the Day
VolcanoDiscovery: Photo of the Day
www.volcanodiscovery.com
October 13, 2026 at 8:01 AM
phaneritic.bsky.social
Great exposures of massive cobble/boulder conglomerate within turbidites of the Great Valley Sequence exposed along the shores of San Luis Reservoir near the visitor center (which was closed!)
Finer siltstone and sandstones in upturned layers of great valley sequence with finger for scale and group of students in background Chonkier cobbles and boulders of granitic and andesitic origins making up the bottom layer of a turbidity sequence that sloughed off the Mesozoic delta into forearc basin floor. Finder for scale. While I I don’t have a picture of the fault offset here is my finger on a small fault showing gouge and crumbled other pebbles and cobbles that were sheared in a left lateral sense
October 10, 2026 at 6:21 PM
iavcei.bsky.social
🌋 August 2026 Compilation of Bulletin of Volcanology! 🌋

1️⃣ "Contrasting eruptive dynamics and hazards of two Holocene andesitic sub-Plinian to Plinian eruptions, Lower and Upper Citlaltépetl, at Pico de Orizaba, Mexico". Torres-Orozco et al.
link.springer.com/article/10.1...

(2/10)
September 16, 2026 at 11:55 AM
daily.acronymy.net
The acronym of the day is SWARTHY:

Some What Andesitic Regarding The Hue Yes

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To submit a new definition for this word, visit acronymy.net/define/swarthy

So far, 30609 out of 270142 words have been defined (11.331%).
August 16, 2026 at 12:01 AM
follow-the-map.bsky.social
2002 Starting in Bellingham, Washington, Chasing snowy peaks in the North Cascades — Mt. Baker's rounded volcanic dome, Mt. Shuksan's jagged spires, and Nooksack Falls tumbling through the forest. ❄️🏔️

#Bellingham #MtBaker #MtShuksan #WashingtonState #PNW #TravelPhotography #TravelDiaries #Geology
August 14, 2026 at 4:46 AM
As far as i know, this looks to be the most informative paper on Silurian volcanics of eastern mendips, its from 1982. Anyone have a better more up to date source? www.sciencedirect.com/science/arti...
Stratigraphy, palaeogeography and structure of the East Mendips Silurian inlier
Sedimentary way-up criteria in the ‘Wenlock shales’ of the East Mendips inlier show that these beds, previously believed to overlie Silurian andesitic…
www.sciencedirect.com
October 28, 2024 at 11:42 AM
olamb245.bsky.social
"Drums, drums in the deep"

Maybe the Mines of Moria exist beneath Ruapehu volcano?

Check out our new paper led by Liam Bramwell detailing the incredible "drumbeat" earthquakes and tremor seen in 2022!

🇳🇿🌋⚒️
Source dynamics of Ruapehu’s 2022 volcanic unrest: insights from drumbeat seismicity, tremor, and crater lake signals - Bulletin of Volcanology
Ruapehu, one of Aotearoa New Zealand’s most active andesitic volcanoes, experienced moderate to heightened volcanic unrest beginning March 2022. This included heightened volcanic tremor, the initiatio...
link.springer.com
May 20, 2025 at 7:23 PM
kazannokai.bsky.social
GVP　Kanlaon
volcano.si.edu/volcano.cfm?...
Global Volcanism Program | Kanlaon
Kanlaon volcano (also spelled Canlaon) forms the highest point on the Philippine island of Negros. The massive andesitic stratovolcano is covered with fissure-controlled pyroclastic cones and craters,...
volcano.si.edu
February 21, 2026 at 12:14 PM
kazannokai.bsky.social
Global Volcanism Program　Kanlaon　
volcano.si.edu/volcano.cfm?...
Global Volcanism Program | Kanlaon
Kanlaon volcano (also spelled Canlaon) forms the highest point on the Philippine island of Negros. The massive andesitic stratovolcano is covered with fissure-controlled pyroclastic cones and craters,...
volcano.si.edu
May 13, 2025 at 10:14 AM
kazannokai.bsky.social
Kanlaon - Global Volcanism Program　volcano.si.edu/volcano.cfm?...
Global Volcanism Program | Kanlaon
Kanlaon volcano (also spelled Canlaon) forms the highest point on the Philippine island of Negros. The massive andesitic stratovolcano is covered with fissure-controlled pyroclastic cones and craters,...
volcano.si.edu
April 8, 2025 at 11:22 AM
cars.uchicago.edu
Qi Chen (University of Chicago) studies the viscosity of Fe-bearing andesitic melts at Upper Mantle conditions, 13 IDD, March 2026.

@advancedphoton.bsky.social
March 31, 2026 at 4:09 PM
cars.uchicago.edu
Qi Chen (University of Chicago) investigates the viscosity of Fe-bearing andesitic melts at upper mantle conditions, 13 IDD, Oct 2025.
October 27, 2025 at 1:37 PM
gmailjohn.bsky.social
At the end of Ngarunui Beach some workers were scaling the cliffs to remove the weedy bush, boneseed - see https://www.powerweedcontrol.co.nz/Services/Boneseed+Removal.html. Some of the boneseed they pulled up. The rock hopping became harder, so that it was easy not to notice the "distinct red pumiceous tuff bed". The red andesitic lapilli-tuff bed with older ring plain deposits is below a lahar sequence, containing clasts of ankaramite and finer-grained basalts set within a sand-pebble matrix of similar composition, and above Waituputupu basalt - a single lava flow of autobreciated olivine basalt (1.5-2 m thick). They are part of an extensive ring plain of lahar and tephra deposits, marked by conglomerates made up of pebbles and cobbles.
February 19, 2025 at 4:35 AM
gkiseki.bsky.social
Geology of Katsurajima Island (Dike)
#Japan #geology #photography #outcrop

Katsurajima Island in Shimane Town, Matsue City, Shimane Prefecture, Japan, is known for its geology formed by andesitic to rhyolitic lava that erupted underwater about 15 million years ago (Middle Miocene epoch).
This location is renowned for the various lava formations that can be observed. This photograph captures a dike cutting through the lava. Upon close inspection of this dike, one can observe that while the deeper parts maintain a dike-like structure, the shallower sections show magma transforming into an auto-brecciated state upon contact with seawater. Such transitions can be observed here. The central pointed hill-like structure is the dike, while the areas on both ends of the photo are lava domes penetrated by the dike. The boundary between the two is marked by a chilled margin several centimeters thick, and they can be easily distinguished by the differences in their well-developed joint systems.
December 6, 2024 at 5:33 PM
gkiseki.bsky.social
Coastal scenery of Noi, Shimane Town, Matsue City, Shimane Prefecture, Japan, overlooking the Sea of Japan.
#photography #landscape #Japan #geology #outcrop
On clear days, the silhouettes of the Oki Islands can be seen in the Sea of Japan, but today it was cloudy and they were not visible. This area is characterized by the distribution of Neogene andesitic to dacitic lava and pyroclastic rocks.
December 3, 2024 at 2:42 PM
gr8flbluejay.bsky.social
The Ambum stone, Enga Province, Papua New Guinea, 3500 BP, stone (a fine-grained crystalline rock, probably an altered andesitic lava or crystal tuff), 20 x 7.5 x 14 cm, National Gallery of Australia, Canberra
May 2, 2026 at 2:42 PM
pacificbarnacle.bsky.social
For #BlueSkyArtShow theme of #Earth here's a photo exemplifying its #Volcanism : #MountBaker (Nooksack: Kweq' Smánit; Lushootseed: təqʷubəʔ) also known as #KomaKulshan or simply #Kulshan, is a 10,781 ft (3,286 m) active[10] glacier-covered #andesitic #stratovolcano (thanks #Wikipedia)
April 27, 2025 at 12:49 AM
nafnlaus.bsky.social
All your pics from Alaska are this weird mix of familiar and different. Like the rock is granitic, metamorphic and andesitic/rhyolitic volcanism (usually plinian), unlike our basalt & hyaloclastite. And of course, more forests. But you have the same willow scrub, angelica, aquamarine lakes, etc. :)
July 14, 2025 at 5:00 PM
nafnlaus.bsky.social
I was thinking, "Your beaches look darker than I expected, I think of white coral sand in the Caribbean", and then I remembered, your island is volcanic just like mine :)

Your volcanism is higher silica / lighter colour (andesitic) than mine (basaltic, black sand), but still, volcanic :)
July 6, 2025 at 1:05 PM
kevinmgill.bsky.social
Augite? Some kind of green agate? It’s pretty crumbly and was found among basalt/andesitic lavas. What am I dealing with here?
A crumbly green rock with a white mineral inclusion A crumbly green rock with a white mineral inclusion A crumbly green rock with a white mineral inclusion A crumbly green rock with a white mineral inclusion
June 4, 2025 at 5:41 PM
paul48n.bsky.social
48ºN/123ºW .....
Hint ...southern Vancouver Island

That active glacier -covered andesitic stratovolcano in the North Cascades is some 72 nautical miles to the nor east ....
November 16, 2024 at 8:26 PM
exsk8pnk.bsky.social
i've never had that exact experience. however, back in the 80's i had a displace wrist fracture from skateboarding. even with the andesitic when my orthopedic doctor set my bones, my legs shot straight up off the exam table, and half my torso followed suit and my toes nearly touched the ceiling.
March 29, 2025 at 2:49 AM
ordofibonacci.bsky.social
Petrogenesis of andesites in a Triassic volcanic arc in the southern South China Sea: constraints from whole-rock and mineral geochemistry
Frontiers
www.frontiersin.org/journals/ear...
Frontiers | Petrogenesis of andesites in a Triassic volcanic arc in the southern South China Sea: constraints from whole-rock and mineral geochemistry
Calc-alkaline andesitic rocks are prominently exposed as a major product of subduction-related magmatism. The identification of Late Triassic andesites in Me...
www.frontiersin.org
September 25, 2025 at 6:17 AM
ordofibonacci.bsky.social
The initial solar system abundance of 60Fe and early core formation of the first asteroids
Science Advances
www.science.org/doi/10.1126/...
The initial solar system abundance of 60Fe and early core formation of the first asteroids
A solar system initial 60Fe/56Fe ratio of (7.71 ± 0.47) × 10-9 is determined using the oldest andesitic meteorite Erg Chech 002.
www.science.org
January 12, 2025 at 7:27 AM