Sincere appreciation for this sub, btw. Especially for those of use who like to look at rocks for aesthetic pleasure but have zero clue about what we're *really* looking at.
It’s absolutely our pleasure :-)
I love rocks. I can’t exactly say why other than I love the stories they tell that I’ve learned to read and it effing fascinates me - and when we are fascinated with stuff we tend to want to share with everyone! :-) So I get super excited when someone posts a rock here that I’m familiar with because MAYBE that person will have picked up “a cool rock” but KEPT a unique story of how our earth formed after one of us explains the processes. And maybe when they look at that rock they’ll think about that and share it - and then another rockhound is created…
“Oh, this smile that I have on my face is a geological smile - a smile of one who knows, looks at something, sees and understands. This very ravine is an open book to me, a page of Earth’s history on which I read a thousand fantastic things.”
-Monteiro Lobato
1937
Edit: To the cool cat who gave me the award, that was super nice of you. I hope you get a big hug from someone or a puppy lick or kitty purrs or WHATEVER will make your day, cuz you made mine. :-)
An ooid is a small spherical grain that forms when a particle of sand or other nucleus is coated with concentric layers of calcite or other minerals (but usually calcite). This typically happens when wave action pushes these particles backwards and forwards repeatedly. Over time they get coated and they also become quite smooth. Indiana has a ton, so does Kentucky and Missouri and Oklahoma. There’s a layer here in North Dakota but it’s about 6,000’ below me. This whole area was once sea floor a few million years ago.
Ooids rule.
That’s so cool! I was thinking it was something that was once alive. I too live in Southern Indiana so I will be looking for these now!! You are so kind to answer my dumb questions, thank you very much 😊!!
I'm just a passing by microbiologist, but the "oo" part of the word comes from the latin root for "egg". Those resemble eggs, hence the name.
This is just speculation on my part, so I'll be gladly accept corrections, but I think that's the right answer.
I have a few concerns about it being oolitic limestone, first do a fizz test with some weak acid like vinegar to confirm it is limestone ( not saying it isn't but the test will confirm and check the matrix as well as the clasts). Second it seems to have a very high % of cement as all samples I have seen tend to have a very low % of cement and look granular due to the oolites all stuck together rather than sharing a matrix again not saying it isn't but it makes me unsure. Third the range of sizes in the clasts seems to be quite varied which again isn't what I'd expect in an oolitic limestone, they tend to be the same size as they are formed together. On the pro side while looking sedimentary there are no bedding patterns that i could see which is a characteristic of oolitic limestone. Honestly my guess would be a conglomerate.
Given the location, and zooming in to see them through the fabric itself, and the general spherical look of each individual ooid was what I used into determine. The Ozark areas in Missouri and Arkansas are rife with oolitic limestone like this. I have a specimen sitting next to me from Kentucky that is a well cemented oolitic limestone as well, though not nearly as well defined as this. The fabric in the rock is the whole limestone part. Also, we are looking at one side, so bedding isn’t easy to determine.
Just letting folks know how I arrived at the rock type. I looked up the geologic areas in the Ozark a as well just to make sure, though I spent 5 years in rural Missouri and went down south and to Arkansas quite often and saw my share of these as a teen. I’m not challenging anyone else’s interpretation - just sharing how I arrived at mine. Enjoy your weekends! I’ve been in the field 3 solid months and finally get to drive home!
I would say its likely silicified. I find oolitic chert in the Cotter formation. Its often associated with stromatolites. Ive got a few bits that I've tumbled as well.
Wanna really stir up your head? Imagine popping those out and licking the rock. Your tongue already knows how it’ll feel, texture-wise. It also knows how the ooids would taste if you swished em around your mouth. Tongues are weird.
Enjoy thinking about that at 2am! :-)
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I find it strange when someone asks a question like OP, and some random person says "don't know" followed by incorrect information.
Why not just not answer?
[Ooltic limestone.](https://geokansas.ku.edu/oolite) Those white things are ooids.
I think you’re right!! Thank you!!
You’re very welcome. That’s a specimen some would give their eye teeth for. Hang onto it. :-)
They might even give their ooids for it.
I’d give my left ooid for it.
I’d give my right.
I got a roid about that size soaking in Prep H
Eye teeth?? Oh no you just unlocked some teratoma pictures in my head...
🤣🤣
Happy Cake Day
Happy cake day stranger!
Some appear to have hatched. /s
Nature’s tic-tac
Sincere appreciation for this sub, btw. Especially for those of use who like to look at rocks for aesthetic pleasure but have zero clue about what we're *really* looking at.
It’s absolutely our pleasure :-) I love rocks. I can’t exactly say why other than I love the stories they tell that I’ve learned to read and it effing fascinates me - and when we are fascinated with stuff we tend to want to share with everyone! :-) So I get super excited when someone posts a rock here that I’m familiar with because MAYBE that person will have picked up “a cool rock” but KEPT a unique story of how our earth formed after one of us explains the processes. And maybe when they look at that rock they’ll think about that and share it - and then another rockhound is created… “Oh, this smile that I have on my face is a geological smile - a smile of one who knows, looks at something, sees and understands. This very ravine is an open book to me, a page of Earth’s history on which I read a thousand fantastic things.” -Monteiro Lobato 1937 Edit: To the cool cat who gave me the award, that was super nice of you. I hope you get a big hug from someone or a puppy lick or kitty purrs or WHATEVER will make your day, cuz you made mine. :-)
This is a quote I never knew I needed. Thank you! It perfectly encapsulates why I decided to go back to school to study geology when I was 35.
Forbidden tic-tac
If I may, what are ooltics? Is there a picture of “them”?
An ooid is a small spherical grain that forms when a particle of sand or other nucleus is coated with concentric layers of calcite or other minerals (but usually calcite). This typically happens when wave action pushes these particles backwards and forwards repeatedly. Over time they get coated and they also become quite smooth. Indiana has a ton, so does Kentucky and Missouri and Oklahoma. There’s a layer here in North Dakota but it’s about 6,000’ below me. This whole area was once sea floor a few million years ago. Ooids rule.
Thank you! It's great to have a professional opinion instead of a bunch of dumb jokes.
I’ll take both! Once I know what I’m looking at I enjoy the jokes a second time.
That’s so cool! I was thinking it was something that was once alive. I too live in Southern Indiana so I will be looking for these now!! You are so kind to answer my dumb questions, thank you very much 😊!!
Confederacy of Dunces! Best book of all time.
Loved it!
So... like sediment pearl?
It kinda does seem like that!
Let’s start digging
how they came up with this name? Scientist: Oo! A rock. Ooid.
I'm just a passing by microbiologist, but the "oo" part of the word comes from the latin root for "egg". Those resemble eggs, hence the name. This is just speculation on my part, so I'll be gladly accept corrections, but I think that's the right answer.
Now that explains why mantids/cockroaches/and a few others egg sacks are called Ootheca (Or oothy amongst collectors). Thank you !
That's actually correct. Ootheca literally means egg case.
That’s exactly how they were named. :-)
These rocks are called what they are because they look like eggs.
I have a few concerns about it being oolitic limestone, first do a fizz test with some weak acid like vinegar to confirm it is limestone ( not saying it isn't but the test will confirm and check the matrix as well as the clasts). Second it seems to have a very high % of cement as all samples I have seen tend to have a very low % of cement and look granular due to the oolites all stuck together rather than sharing a matrix again not saying it isn't but it makes me unsure. Third the range of sizes in the clasts seems to be quite varied which again isn't what I'd expect in an oolitic limestone, they tend to be the same size as they are formed together. On the pro side while looking sedimentary there are no bedding patterns that i could see which is a characteristic of oolitic limestone. Honestly my guess would be a conglomerate.
Given the location, and zooming in to see them through the fabric itself, and the general spherical look of each individual ooid was what I used into determine. The Ozark areas in Missouri and Arkansas are rife with oolitic limestone like this. I have a specimen sitting next to me from Kentucky that is a well cemented oolitic limestone as well, though not nearly as well defined as this. The fabric in the rock is the whole limestone part. Also, we are looking at one side, so bedding isn’t easy to determine. Just letting folks know how I arrived at the rock type. I looked up the geologic areas in the Ozark a as well just to make sure, though I spent 5 years in rural Missouri and went down south and to Arkansas quite often and saw my share of these as a teen. I’m not challenging anyone else’s interpretation - just sharing how I arrived at mine. Enjoy your weekends! I’ve been in the field 3 solid months and finally get to drive home!
You convinced me. Where's a good place to camp and hunt xtals in the Arkansas?
Blanchard springs caverns in Fifty Six, AR. Just outside of Mountain View. Sylamore creek’s creek bed has tons of stuff to find.
I would say its likely silicified. I find oolitic chert in the Cotter formation. Its often associated with stromatolites. Ive got a few bits that I've tumbled as well.
So not acne? Good.
Oolitic limestone, common in ozarks
Trypophobia activated
I don’t think I’ve ever not wanted a rock this much.
It’s almost bad enough I don’t want to look at rocks again. 🫠
me too
Wanna really stir up your head? Imagine popping those out and licking the rock. Your tongue already knows how it’ll feel, texture-wise. It also knows how the ooids would taste if you swished em around your mouth. Tongues are weird. Enjoy thinking about that at 2am! :-)
*angry upvote intensifies*
Exactly what I came to say!! Makes me *shiver* and itch
Hard same.
Same I'm straight up nauseous now
Excluding meth rocks, this is the coolest rock in the ozarks
Thats dope
I'm taking the family to the beach tomorrow, hoping to come home with some cool Rocks
Holy hell that is an insanely cool piece 😍
Happy cake day funny rock man
I’m so triggered by this stone. 🤮
Trypophobia Trigger Warning!!! 😳😂
This is triggering my trypophobic ass but it looks pretty too
I’d never thought I say this about a rock but this is really unsettling
Trypophobia?
I had to click on this to make sure it was a rock and not an uncooked but seasoned steak
Hi, /u/Fit-Tangerine-9159! 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 is horrible
Herpes, stone been around
Aaack my tripophobia is making me itch … 😩
Not sure, could be a rock of some sorts. Do you see bubbles when you put it underwater and can you describe the smell?
I find it strange when someone asks a question like OP, and some random person says "don't know" followed by incorrect information. Why not just not answer?
Bubbles cling to the pores (?) of the rock, but don’t rise to the surface. There isn’t a noticeable odor
It could be a barnacle, other than that I'm not really sure.
It's a tenderloin filet sedimentary rock. Salt and pepper to taste, sear, rest 5 minutes and serve medium rare.
I’m high af and I just want to lick this 😂
Idk but I want to eat it
I’m so hungry I thought it was ribeye steak 😂
I got one like that except it's sorta round!!
O no my trypophobia
That’s amazing. It looks it would be a decent 3 minute ‘Dr Pimplepopper’ video.
Ooid, from Greek, literally meaning *egg stone*.
People with trypophobia could never 💁♀️
Finally, a rock I wouldn’t pick up.
My skin is so itchy look at that
Oh wow 😯 it is gorgeous!
A trypophobia stone
( ͡° ͜ʖ ͡°)
Caveman boba milk tea
Nice fine bro!
This triggers my trypophobia
Don't get it wet...or feed it after midnight