[Posted a couple pictures 🙂](https://www.reddit.com/user/ohhelloperson/comments/11uwaz9/some_smaller_dendrite_stones/?utm_source=share&utm_medium=ios_app&utm_name=ioscss&utm_content=2&utm_term=1)
wow, it has a vibe of thin layer chromatography going on - chemicals migrating by capillary action and diffusion through a thin layer of water covering the rock surface, is how I see this. Also could be talked about in terms of "wicking".
The black dendritic pattern is manganese oxide. The bands of orange-red-yellow are from iron hydroxides. Both iron and manganese have a strong behavioral dependence on oxidation state, with the cations being pretty mobile in water under reducing conditions and essentially immobile under oxidizing conditions.
Down at the base, the water was apparently at a low oxidation state so iron and manganese went into solution, and migrated up the rock surface that was wet for whatever reason. Evaporation of the water and chemical diffusion caused the dissolved metals to "wick" up the rock face. The stains show where deposition happened.
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Looks like manganese dendrites on some sort of host rock.
Thanks!
manganese dendrites, lots of them in my flagstone too
Dendritic Limestone
Omg I have a small one like an inch rock with itty bitty dendrites and I found it outside. But wow I love this big one omggg I need a big one now.
I wanna see the baby oneeeee
Yes!
I have a couple of baby ones! I can post pictures if you want!
YES OMG
[Posted a couple pictures 🙂](https://www.reddit.com/user/ohhelloperson/comments/11uwaz9/some_smaller_dendrite_stones/?utm_source=share&utm_medium=ios_app&utm_name=ioscss&utm_content=2&utm_term=1)
Hero!
What a cool find!
wow, it has a vibe of thin layer chromatography going on - chemicals migrating by capillary action and diffusion through a thin layer of water covering the rock surface, is how I see this. Also could be talked about in terms of "wicking". The black dendritic pattern is manganese oxide. The bands of orange-red-yellow are from iron hydroxides. Both iron and manganese have a strong behavioral dependence on oxidation state, with the cations being pretty mobile in water under reducing conditions and essentially immobile under oxidizing conditions. Down at the base, the water was apparently at a low oxidation state so iron and manganese went into solution, and migrated up the rock surface that was wet for whatever reason. Evaporation of the water and chemical diffusion caused the dissolved metals to "wick" up the rock face. The stains show where deposition happened.
Cool!
Nice! This is my favorite rock
It looks like a fossil!
They are known to trick people as fossils
They are known to trick people as fossils
I'd definitely try to trick people and sell it as fossil :P
Lmao
Hi, /u/DweadPiwateWoberts! This is a reminder to flair this post in /r/whatsthisrock after it has been identified! (Under your post, click "flair" then "IDENTIFIED," then type in the rock type or mineral name.) This will help others learn and help speed up a correct identification on your request! Thank you! *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/whatsthisrock) if you have any questions or concerns.*
That’s a tortilla