#thinsection — Public Fediverse posts

Thin Section Thursday! Photo and caption by Matthew Cruz, UG student: Unakite is a metamorphic rock primarily composed of Epidote, Orthoclase, and Quartz. The vibrant colors (XPL) come from the interference colors of Epidote. #unakite #thinsection #thinsectionthursday

Thin Section Thursday! Photo and caption by Matthew Cruz, UG student: Unakite is a metamorphic rock primarily composed of Epidote, Orthoclase, and Quartz. The vibrant colors (XPL) come from the interference colors of Epidote. #unakite #thinsection #thinsectionthursday

Recursive polygon subdivision, part 2

Here the seed polygon (40-gon) is recursively cut using sweeping perpendicular lines and the resulting number of polygons varies greatly depending on the position of these cuts (combined with a configured minimum poly target area). The area of each polygon is mapped to a color from a predefined gradient.

Live demo (slowed down to better observe the algorithm):
https://demo.thi.ng/umbrella/poly-subdiv/

Commented source code:
https://github.com/thi-ng/umbrella/blob/develop/examples/poly-subdiv/src/index.ts

2/2

#TextureTuesday #ThinSection #Geometry #Polygon #Subdivision #Recursion #AlgorithmicArt #ThingUmbrella #TypeScript

Recursive polygon subdivision, part 2

Here the seed polygon (40-gon) is recursively cut using sweeping perpendicular lines and the resulting number of polygons varies greatly depending on the position of these cuts (combined with a configured minimum poly target area). The area of each polygon is mapped to a color from a predefined gradient.

Live demo (slowed down to better observe the algorithm):
https://demo.thi.ng/umbrella/poly-subdiv/

Commented source code:
https://github.com/thi-ng/umbrella/blob/develop/examples/poly-subdiv/src/index.ts

2/2

#TextureTuesday #ThinSection #Geometry #Polygon #Subdivision #Recursion #AlgorithmicArt #ThingUmbrella #TypeScript

Recursive polygon subdivision inspired by thin-section mineralogy...

(The area of each polygon is mapped to a color from a gradient. Made with https://thi.ng/geom, see next message for example & source code...)

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#TextureTuesday #ThinSection #Geometry #Polygon #Subdivision #AlgorithmicArt #ThingUmbrella #TypeScript

Recursive polygon subdivision inspired by thin-section mineralogy...

(The area of each polygon is mapped to a color from a gradient. Made with https://thi.ng/geom, see next message for example & source code...)

1/2

#TextureTuesday #ThinSection #Geometry #Polygon #Subdivision #AlgorithmicArt #ThingUmbrella #TypeScript

Mineral Monday! Is it glaucophane, chloritoid, or blue-green amphibole in Dutchess Co. NY? See our other social media feeds for more. By Donna Whitney et al. #MSACommunications #MineralMonday #thinsection #glaucophane #chloritoid #amphibole #DutchessCounty

Mineral Monday! Presented here is a selection from Steinbilder (“Rock Pictures”), a series of digitally-worked abstract artworks by Roger Mitchell, using petrological images as a starting point. #MSACommunications #MineralMonday #thinsection #art #abstractart

Did some more brainstorming about a title for this project/piece and have settled on STRATA for now — these emerging structures/fragments very much remind me of them (rock strata and/or thin section microscopy) and the many folds & cross-stratifications observed on my hikes over the past few years have been a regular inspiration to keep working on this project...

Also see:

- https://mastodon.thi.ng/@toxi/111173324137924265
- https://mastodon.thi.ng/@toxi/109931051187422957

#STRATA #CellularAutomata #GenerativeArt #Art #Abstract #Texture #ALife #Geology #ThinSection #Simulation #NoAI

One more resource before #MinCup23 voting starts: during the pandemic we discovered the http://www.alexstrekeisen.it/ site run by Alessandro Da Mommio (in Italian and English). It's chock-full of sample and thin section photos, well organized.

Blue #sapphirine is well represented: here a reaction texture between sillimanite and cordierite, in thin section.

#mineralogy #thinSection #photography

#Sapphirine has a complicated structure, with Mg in two sites and Al both four-fold and six-fold coordinated. It has only about 15 wt% SiO2.

It has monoclinic symmetry, but still can form attractive crystal faces when it can grow unimpeded. A good example is on the cover of Dexter Perkin’s on-line mineralogy text, found at:
https://opengeology.org/Mineralogy/

In polarized light, sapphirine changes color with orientation (called pleochroism).

#MinCup23 #Minerals #Mineralogy #ThinSection

Learning sedimentary rocks and how to analyze their thinsections. Lithuania, Milaičiai ~940 meter depth. Silurian period South Baltic seasedimentary basin, coral reefs.
#microscope #microscopy #silurian #sedimentary #thinsection #fossil #fossils #rock #geo #geology #paleo #paleontology

Learning learning learning
#thinsection #CL #geology #paleontology #microscopy

Having fun with microscope!
#geology #microscopy #paleontology #thinsections #thinsection

Current obsession: #ThinSection #Minerals polarized light #Microscopy 😍

Fully aware it's way more common/popular to cite early/mid 20th century artists/designers/movements as inspiration/reference in contemporary #GenerativeArt, but I've always had _zero_ interest in those (as reference) and to this day been finding my main inspirations in science and natural phenomena/processes...

All of the attached images are from/by Spectrum:
http://www.petrography.com/

Ps. Also loving their process overview video and some of the ingenious methods (like using quartz crystals to estimate remaining sample thickness) used to prepare the samples:

https://www.youtube.com/watch?v=Kjry4Q-qMe0

The thin section scan looks wild enough already

#geology #thinsection #wild

Santa this year brought me a new batch of #Elba #thinsection (s) which included my first 5 thinnies of the #sanbagawa rocks! I am so happy 😍 😍 😍 🎄 🎆 🎇 Happy 2023 everybody! #geology #academia #happynewyear

Thin Section

This is Faithfull John’s favorite rock he has shared with us for ThinSectionThursday: https://mastodon.social/@FaithfullJohn/109597538422157384

Today you will see other photomicrograhs of rock ground so thin light can pass through them, and are mounted on glass slides. The thin sections are viewed under petrographic microscopes, and by analyzing the optical properties of the thin sections geologists can determine the environment the rock was created in, the past history of the rock, and a whole wealth of other information.

Here’s an example of analysis of a rock from the Zagros mountains: https://blogs.egu.eu/geolog/2015/10/19/imaggeo-on-mondays-what-a-thin-section-has-to-say-about-the-deformation-of-the-zagros-mountains/

Also, Alex Strekeisen has an entire website of fascinating and informative information on thin sections: http://www.alexstrekeisen.it/english/

Hopefully you gain new insights into all the beautiful thin sections you see on Thursdays:)

Thank you @FaithfullJohn for sharing your favorite rock!

#ThinSectionThursday #ThinSection #rocks #geology #ScienceMastodon @geology

Nakhla meteorite for #ThinSectionThursday

Nakhla is a Martian-origin achondrite. It is the type specimen for the entire class of Nakhlites that originate from #Mars.

The Nakhla #meteorite fell near Alexandria Egypt on June 28, 1911.

#meteorites #planetaryscience #geologyrocks #spacerocks #thinsection

@sumendiak @doclomieu sigue hashtags de temas que te gusten, hay gente maja por aquí.
Ejemplos
#volcano
#volcanology
#petrology
#thinsection
#ThinSectionThursday
Y cómo no
#FridayFold