#boudinage

[pinoue]

#pinoue #adventcalendar #calendrierdelavent #lapin #bunny #rabbit #sulking #boudinage #dessin #draw https://www.instagram.com/p/CmCyzQrKYVP/?igshid=NGJjMDIxMWI=

[chemindesoie]

Les objections - 4 - on l'on ne badine pas avec le boudinage

“Ça me serre / ça me boudine de partout” Je crois que si votre problème est là, c’est que vous avez un souci de taille. Je veux dire, soit avec la taille du porte-jarretelles, soit avec la taille de vos bas, soit avec les deux. Mais ce n’est clairement pas un problème avec votre taille à vous ! Il existe des bas ou des porte-jarretelles en grande taille, si nécessaire. Je crois même que Secrets…

[notaboxofrocks]

Some photos from this year’s trip to South Dakota in the fall. First picture is at Badlands National Park showing the Chadron and Sharps Formations, second is of a road cut showing boudinage, third is parasitic folding, fourth is a fold at Wind Cave National Park, fifth is a pretty sunset (everything was rose-tinted, and the red rocks of the Spearfish Formation made it feel otherworldly), and sixth is the Kidney Spring in Hot Springs, SD.

[septarianflame]

Are you a mimeral beacuse . i want to lick you for the bone test

i might just be a mineral!

Are you a mineral of another kind? Because with enough differential stress, we can engage in some boudinage

[earthstory]

Deformed Dikes I have a long-running hypothesis that I’ve spoken of here before, and that is that every rock in Greenland is awesome. This sample is no different. This is a metamorphic rock, a gneiss, showing boudinage of a mafic dike. 

The history of these rocks begins over 2.5 billion years ago, in the Archaean. The rocks of this area are ancient, with many sections first having formed 2.8 to 3.0 billion years ago as igneous rocks, and occasional bits possibly being as old as 3.7 billion years old – some of the oldest rocks on Earth. All of them were first metamorphosed about 2.5 billion years ago, heating and stressing them so much that the original igneous textures and relationships were removed. The dark rocks used to be dikes of basaltic igneous rock. About 2 billion years ago, a suite of igneous rocks known as the Kangâmiut dyke swarm intruded this area. Dikes are fractures in rock formed when areas are pulled apart and molten rock swarms in. This area, therefore, was being pulled apart about 2 billion years ago, telling part of the story of this area. Most likely, the earlier metamorphism is related to an early collision between landmasses – pieces of what are today Greenland and North America ran into each other, triggering mountain building and metamorphosing rocks at the bottom. Then, the rocks began to pull apart – creating fractures and allowing the dikes to enter the rocks. Finally, about 1.8 billion years ago, another large metamorphic event happened. After the opening and rifting, mountain building resumed in several pulses, including generation of new igneous rocks. At this spot, we had igneous dikes cross cutting metamorphic rocks. As they were heated and sheared, the dikes remained stronger than the surrounding metamorphic rocks. The dikes fractured into blocks, while the metamorphic rocks around them smeared out and filled in the gaps. This structure is called “Boudinage”, literally referring to the strong rocks being stretched out into blobs similar to the making of sausage. The 1.8 billion year old metamorphic rocks seems to have related metamorphic rocks in Canada, so this mountain building event was likely the docking of the North Atlantic Craton to the growing continent called Laurentia. These continents stayed hooked together until about 60 million years ago, when the Labrador Sea opened along with the spreading of the North Atlantic. -JBB Image credit: https://commons.wikimedia.org/wiki/File:Boudinage_near_Kangerlussuaq.JPG References: http://trigon-gs.com/Wittig_et_2010.pdf http://www.eng.geus.dk/media/10932/nr28_p57-60.pdf http://www.geus.dk/media/12311/nr11_p061-086.pdf https://www.nrcresearchpress.com/doi/10.1139/e02-027

[genvieve-of-the-wood]

My Poem Was Published as a Scientific Paper and Everyone Learned Something

Onomatopoeia mixed with

alliteration

produces vibrations that raise

unexplainable

poetic sorcery,

of which I will,

today,

hypothesize that words

are emphatically

needed in vast arrays,

amounts, sizes

in order to advance

scientific knowledge.

Observe!

Read the following words

and tell me, 

fellow explorers,

you do not have a sudden

urge to find out more:

anastomosis, 

cassiopeia andromeda,

Heisenberg’s Inequality, boudinage,

labyrinthitis, fenestrane,

chordae tendinae,

gynoecious cucumbers,

carpenter bees,

Zephyrs-

New

words are books

that haven’t been read yet,

utterances and verses

not mentioned -

like a poem

not read to a lover

but hidden,

folded, crumpled

in a pocket.

Nothing will happen

unless the words

are read, relished

and declared

for discovery’s sake.

One cannot read poetry

without curiosity,

one cannot make sense

of the world

either.

Are poets scientists

or are

scientists poets?

I think we will

borrow words

from each other,

finish each other’s sentences,

like lovers do.

@genvieve-of-the-wood April 11, 2019

[gaetaniu]

Rivelato il destino delle placche tettoniche che affondano

Rivelato il destino delle placche tettoniche che affondano

I ricercatori dell’Università del Texas di Austin hanno pubblicato uno studio su Nature che afferma che le placche tettoniche in subduzione si segmentano come un serpente, in un processo simile al boudinage geologico (nella foto) ma su una scala molto più grande. La superficie del nostro pianeta è un’accozzaglia di placche tettoniche in movimento, con nuove placche che emergono mentre altre…

[moonshroud]

field class adventures

portugul. the man’s  “feel it still” being the song of our trip

“dude, the disco music you played was 70% 80s pop”

the death van

the professor being the literal personification of “fight me”

one of the grad students losing everything constantly and being a running joke for it

said grad student did not study geology in undergrad

one guy being a mystery mountain man and going for freezing swims and long ass hikes at 5 am every day

making jokes to the one vegan about having enough protein

“are you drunk?” “no, you just don’t know me well enough”

“the professor may be 4′10″ but she will out hike you AND out drink you” 

the compliment bag of wine toast turning into the bag of wine roast

“i just wanted to slap the bag”

“i would like to toast the bear”

seeing baby bears and hearing bears out in the woods 

getting pooped on by geese

swimming in every lake

one guy getting everything he owns wet because he legit won’t stop going in rivers

everything being a dike or a boudinage

“i’d name my dog boudin”

doodle adventures 

two guys in my food group looking like the bullies in sky high 

the nicknamer

mountain man being addicted to coffee and some other guy being addicted to cigarettes

grad TA: “in school you put on this fake thing, but i know you, i see you before you get up and have your coffee. i know what you really are like.”

 “we start with the chicken yodeler and we end with the chicken yodeler”

that one walmart run

walmart swaggin for the rest of the trip

teacher being mad at us for making her go to walmart 

those off road bush wacking stops

people stopping and telling us about the geology of the area and most of them never being right

so many beer runs 

so many gas station snack stops

fearing for my brunton

“the lecture will be 30 minutes” “ok so like 2 hours”

“you don’t collect rocks??? are you even a geologist???”

everyone talking about the food they want when they get back 

the people we stayed with having a box filled with he man action figures on stand by

also them being super self sufficient

“guys, it feels like summer camp!” 

then immediately getting cabin fever

one guy being voted most likely to die 

the most drunken leans happening

birthday party for 2-3 people with store bought cake

“im not a city person, that’s why im a geologist!”

i might think of more eventually 

[archaeologicalhorizon]

66 PLANETS // 26: BOUDINAGE Acrylic on canvas, 2017

[agneissschist]

Recieved this photo from a friend currently in Australia of some incredible boudinage.

[earthstory]

A deeper look

Lurking beneath all the more recent layers of rocks that drape our continents are their roots, the oldest of which are the remnants of cratons, the first nuclei of the light buoyant surface rocks that float atop the underlying mantle. When they pop into visibility at the surface, the most amazing patterns reveal themselves. These rocks have been repeatedly heated, melted and compressed as the continents moved back and forth, colliding and separating into supercontinents in their Wilson cycles.

Each mountain building event leaves its impression in the folding and melting of the rocks, forming a palimpsest of what geologists dryly term thermal and deformation events. Not a very poetic way, I know, to describe such tremendous forces that shaped the surface of long gone landscapes, but there you have it.

The photo shows boudinage, from the French for blood sausage. The semi molten rocks reacted to stress by straining, sliding around in a plastic manner known as ductile. Large chunks of darker low silica volcanic rock have been broken apart and intermingled with others, revealing something of the pattern of the forces. These rocks were melting while this was happening, and the white veins are the resulting new born granite. As the dark chunks separated, lower pressures resulted on one side (abive the dark mass in the photo), and the grey gneiss flowed into the area, producing the folded structure. The white veins are even more intricately folded, revealing further moments of pressure while the rocks were soft.

The photo was snapped in the Prince Charles mountains of Antarctica, 1 400 km long range whose main surface expression are nunataks (mountain tops poking out of an ice sheet). They are one of the few areas with extensive rock exposure in the whole continent, where a block of rock measuring 600x300km has sunk downwards between two faults forming a graben, a bit like Africa's great rift valley.

The event that shaped these rocks is thought to have occurred around a billion years back, with a second event around 500 million years ago with at least three recognised deformation events.

Loz

Image credit: Adrian F Corvino/Outcropedia

http://www.antarctica.gov.au/living-and-working/stations/mawson/environment/prince-charles-mountains http://www.antarctica.gov.au/living-and-working/stations/mawson/environment/prince-charles-mountains/northern-prince-charles-mountains

[hammerforscale]

Check out this sexy boudinage from above Torrisdale Beach on the north coast. 

[liliannorman]

Friday fold: The University of Wisconsin rock garden

I’m at a workshop in Madison, Wisconsin, this week. I took the lunch hour today and walked over to the geology department to check out their rock garden and geology museum. I was pleased to find a Friday fold in the rock garden: a limestone with cherty nodules/layering that has been folded…. Bonus: some nice bookshelfing/boudinage of the chert: …And here’s another boulder of the same lovely stuff. And here …

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