10000 YEAR OLD ROCK ART OF GIRAFFES FOUND IN LIBYA LET'S GO
YES!!!!!!! YES!!!!!!!!!!!!!!!!!
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@metamorphosedsapphic
10000 YEAR OLD ROCK ART OF GIRAFFES FOUND IN LIBYA LET'S GO
YES!!!!!!! YES!!!!!!!!!!!!!!!!!
ahhhh finally the weekend is beautiful and wide open ahead of me. surely this will be the weekend I finally get my whole life in order and do the twenty-seven things I've been putting off and fix my sleep schedule and make memories with friends and discover my purpose in this world. surely
this time we're really gonna do it guys. I believe in all 4000 of us
A poem about
grief,
confusion,
processing memories,
longing,
and acceptance,
when two people can't speak.
mohs hardness 10 being diamonds is a generational L for the silicate minerals. They are the most capable mineral group by far and they got ran by a carbon bond. David and goliath story. Historic defeat. Quartz was a prodigy and it got her where? Exactly. Third place. I mean it's not bad. But it's not first.
not even bronze ! 😔
I can't lie. I can't count. I got here by accident and sheer will
mohs hardness 10 being diamonds is a generational L for the silicate minerals. They are the most capable mineral group by far and they got ran by a carbon bond. David and goliath story. Historic defeat. Quartz was a prodigy and it got her where? Exactly. Third place. I mean it's not bad. But it's not first.
I went to I miss you island and the fog was so thick I couldn't see other people but I shone lights and beamed some morse in the hopes you'd see and I may never know if you saw it on your ship but I didn't want you to pick me up yet. It was just "I'm still here. See you friend."
ancient geologist vampire undergrad learning about the local geology and reminiscing
the way I worded this makes it sound like being a geologist is an identity and they're taking a bachelor's in vampirism. which. I mean. some of you out there
I should be able to challenge the professor to a duel if I think their style of teaching isn't right
This lesbian is being metamorphosed to HRT conditions, as of now Low-E/Hi-GnRH.
this is to say I've started E and T-blockers
This lesbian is being metamorphosed to HRT conditions, as of now Low-E/Hi-GnRH.
year 2, semester 4, metamorphic petrology field trip
it's a good thing I love walking. Otherwise I'd hate this more than anything.
36°C heat, with only the sun and ourselves to keep us company, we started walking up a slope toward the large marble quarry that Penteli is known for. Same marble that built the great monuments of ancient Athens, of course. On the way up we stop to look at a good outcrop of (ortho)gneiss from a metamorphosed granite, a sample of which is here on the left, rich in mica and thinly banded and sparklier than the night sky, metamorphic petrology has so cooked us that we all saw it's green and schistose and called it greenschist, lol.
Greenschist we did find further up the path, though it's mixed with marble, and we got told the (newfound) big of geology wisdom that, actually, that term is pretty much useless due to the sheer amount of protoliths that can spawn it rendering the term kind of too vague. So this is actually a basaltic intrusion, metamorphosed to the greenschist phase (thus a "metabasalt"), turned schistose due to stresses, and bundled together with some nice white marbles, that metamorphosed alongside them.
The views in and from that quarry are beautiful, if only Mt. Penteli wasn't literally the most fertile ground for fires it'd be greener.
The metabasalt intrusions ultimately ruin the market value of the marble, so the quarry was abandoned. A student doing her dissertation, however, told us about its metamorphosis. The highest temperature reached was 350°C at 6-8 kbars, very close to the blueschist fascies and so in one sample they even found blueschist minerals like glaucophane. Greece is today where the ancient Tethys ocean once laid, and many terranes were subducted into forming the landmass of today.
We then went on a 5km hike up Mt. Penteli on a quest to see the general geology of the area. Essentially (and reductively,) the mountain is like a large anticline fold or an upside down U, with orthogneiss as the lowermost layer and strata of marbles and metapelite schist above. Of course, it's more complicated. Faults and folds have made the anticline nigh unrecognisable, the metapelites vary wildly in schistosity and they often mix with the marbles to form the sparkliest rock you'll ever see, a metamorphosed marl, and the basalt intrusions from earlier show up either schistose or massive or granular, along with dikes of quartz and calcite, and interspersed are pockets of more gneiss.
The climb to the (almost) top was beautiful, although doing it by foot at this weather sucked. The sun blazed unwaveringly and the view was stunning.
At the end we found one final piece of geology trivia: the migmatite.
(I cut so many sights that were less interesting or required more scientific jargon to explain, I am sadly not paid to post half-remembered and dehydrated geology ramblings on tumblr dot com)
Migmatites are rocks that got so hot they almost became igneous rocks again. They're the very edge of what's considered metamorphic, and occur in extreme heat. The heat comes from?.. No, not the earth. The earth's mantle itself is actually a terrible heat source if you're in the crust. Most of the heat for this to happen comes from "viscous heating", where shear forces and stresses create immense amounts of heat due to internal friction. This can very effectively heat large amounts of crust relatively quickly and explains a lot of metamorphic phenomena in the crust. The result is sheared rocks and folds of very tight angles.
We then stopped for a while to talk about the past of the area: basically, whenever from the same time period-ish you find both basaltic and granitic magma, which occur under normally starkly different circumstances, this is a sign that something's up. In the case of this orogen, we know from other signs (specifically, some boudinage of the basaltic intrusions) that this locale was once in tension, so it was basically stretching. This type of bimodal magmatism is typical of continental rifting, which fits the bill perfectly for this area and is indeed what happened here. Basically, the rocks in this mountain, after being subducted and metamorphosed, were once in a forming back-arc basin.
That was the end of the field trip's educational curriculum. But wait! A cherry on top: Epidote. Seen below as the pistachio-green pieces inside the overall less saturated blue-green rock.
That's all the interesting stuff for now. Thank you if you read this far. I like telling you things :)
year 2, semester 4, metamorphic petrology field trip
it's a good thing I love walking. Otherwise I'd hate this more than anything.
36°C heat, with only the sun and ourselves to keep us company, we started walking up a slope toward the large marble quarry that Penteli is known for. Same marble that built the great monuments of ancient Athens, of course. On the way up we stop to look at a good outcrop of (ortho)gneiss from a metamorphosed granite, a sample of which is here on the left, rich in mica and thinly banded and sparklier than the night sky, metamorphic petrology has so cooked us that we all saw it's green and schistose and called it greenschist, lol.
Greenschist we did find further up the path, though it's mixed with marble, and we got told the (newfound) bit of geology wisdom that, actually, that term is pretty much useless due to the sheer amount of protoliths that can spawn it rendering the term kind of too vague. So this is actually a basaltic intrusion, metamorphosed to the greenschist phase (thus a "metabasalt"), turned schistose due to stresses, and bundled together with some nice white marbles, that metamorphosed alongside them.
The views in and from that quarry are beautiful, if only Mt. Penteli wasn't literally the most fertile ground for fires it'd be greener.
The metabasalt intrusions ultimately ruin the market value of the marble, so the quarry was abandoned. A student doing her dissertation, however, told us about its metamorphosis. The highest temperature reached was 350°C at 6-8 kbars, very close to the blueschist fascies and so in one sample they even found blueschist minerals like glaucophane. Greece is today where the ancient Tethys ocean once laid, and many terranes were subducted into forming the landmass of today.
We then went on a 5km hike up Mt. Penteli on a quest to see the general geology of the area. Essentially (and reductively,) the mountain is like a large anticline fold or an upside down U, with orthogneiss as the lowermost layer and strata of marbles and metapelite schist above. Of course, it's more complicated. Faults and folds have made the anticline nigh unrecognisable, the metapelites vary wildly in schistosity and they often mix with the marbles to form the sparkliest rock you'll ever see, a metamorphosed marl, and the basalt intrusions from earlier show up either schistose or massive or granular, along with dikes of quartz and calcite, and interspersed are pockets of more gneiss.
The climb to the (almost) top was beautiful, although doing it by foot at this weather sucked. The sun blazed unwaveringly and the view was stunning.
Climatologists since the last century: The climate crisis is real. There will be very dire consequences. We need to act NOW because human activity is at fault for this
Random academic with multiple degrees, none of them relating to climatology, who is also your professor: No it's volcanoes. You don't know anything. Trust me I know
Year 2, semester 4, geochemistry field expedition.
I got covered in efflorescent sulfur salts and the smell won't come OFF
Anyway. Here's to another successful field expedition, this time for geochemistry. We analysed water samples and talked about acidic runoff as a product of mines, as well as seeing some old metal refining waste and discussed how it is dangerous, how it is dealt with, etc.
During our survey of an ex-mine still populated by sulfide minerals like magnetopyrite/pyrrhotite, iron pyrite, galena, sphalerite and all their secondary minerals, talk came up over these efflorescent salts that come about as sulfides break down and the sulfur's gotta go somewhere.
Well the professor overlooking us asked me to collect some samples of them for something he wants to analyse, and I was happy to oblige. Note: sulfur salts are very powdery in this form, and as soon as I stuck the flat end of my hammer into it, discovered that with my very own eyes, and nose, and mouth, and boy! is it sulfurous! I think I startled an ancestor or two thinking we were in a german gas raid.
Well, I didn't stop there, truth be told I actually just kept going. I then found some of the marble bedrock, took a chunk out of that too. And then something else that was weird and I've yet to clean up. And only THEN did I realise I smelled like sulfur, everywhere. For some reason, to me sulfide minerals smell more like a mix of garlic and burnt iron.
btw when u split an atom the energy released is actually from democritus seething and coping
I have an impressive collection of rocks. I am sensitive and have many hobbies and a hopeful heart. I am exotic and tall and determined. what more could girls want from me
shit man, this geology war is fucked. i just saw a volcanologist shoulder their rock hammer and say "pyroclastic blast" or some similar shit, and every geologist around them turned into mummies, frozen forever in poses of fear and horror, and die. the camera didn't even go onto it, that's how common shit like this is. my ass is firing rockslides and mudflows. i think i just heard 'iridium meteor fallout' two groups over. i gotta get the fuck outta here.
alright boys we hit 1k pack it up go home that’s enough-