A Really Unique (and Big!) Michigan Rock
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- Опубліковано 3 чер 2024
- Please help me identify this rock. Someone brought it to me for identification but I don't know what it is.
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*Geologists Only Discussion Here*
It looks to be a stromatoporoid fossil to me. I put together a little video explainer. Not sure whether you can share it to the comments.
@@CraigMcClarren Sometimes UA-cam considers links to be spam. Here it is: ua-cam.com/video/ihY1j_OXpy4/v-deo.htmlsi=YpBQxSWWFychXnbf
Craig details some great points, but I have never seen a stromatoporoid this mineralised. To me, this looks very much like a travertine deposit, based upon the layering and just how mineralised it is. My only reservation to this is I don't know of any hot spring deposits in that part of Michigan or in Canada (brought down by glacial ice) that would produce something like this. If in fact this is a fossil, it is an incredible specimen that is worthy of being displayed in a museum. Seeing this in person would really resolve a lot of these questions...
@@CraigMcClarren Great presentation; thank you!
@@CraigMcClarren Great video!
Hi, I'm the owner of the beautiful rock, and I'm very excited and happy with all the responses. THANKS SO MUCH (RAY).
Nice to see a comment from you, Ray! Thanks for allowing your rock to spend a couple weeks at my house.
From the looks of it my guess would be gypsum. There are a few outcropings in the state. The orange crystals look identical. I see a lot that someone will mine or find a rock in a different location and relocate it. Perhaps someone put it out in the lake. Gypsum is very soft and the water probably eroded the groves that you see. Cool find!
@@adventurecooper I wondered if it had been dropped in the lake by someone too. Seems unlikely in 1919, but it's definitely possible.
Looks like a chunk of flowstone from a cave.
Thanks for the video Rob ! My wife and her sister were driving through Petoskey a couple weeks ago. Although I've never been there I was able to suggest that they they try to find some Petoskey stones. They struck out looking for the stones but had a good time hunting for them and as usual she brought back a sack full of random rocks. She mentioned to her innkeeper that they had tried to find the stones and the lady gave her several Petoskey stones from her stash. Thanks again !
I love that someone was nice enough to give her a few even though she didn't find any of her own. There are some nice people out there.
It's from inside of a cave, either a stalagmite or a stalagtite. Formed by mineral rich water evaporating off of a surface and leaving some of the minerals behind to form what you see.
That's what a lot of people are saying. Any idea how it would have gotten into a lake in Northern Lower Michigan? I know human transport is always a possibility, but I'm wondering if there is a natural way it could have gotten there.
Almost looks like it was part of a formation in a limestone cave.
Agreed, it looks like a calcified layering formation, especially after he mentioned the acid test.
That's exactly what I was thinking too. Stalactite stalagmite.
I am 90% sure the statement below is correct: [Almost looks like it was part of a formation in a limestone cave.]
Dang! I fished on Crooked Lake all the time when I was growing up and we never found any rocks that good!
I've never been to Crooked Lake, but I assumed this was not the norm for there.
Craig's explanation is excellent. That's a really cool specimen.
We had gypsum mines near Grand Rapids....it kind of reminds me of some gypsum samples some of my former student brought in.....would not say for sure.
Cave Onyx. I am not a geologist but I am a lapidary and a many decades member of the Madison Gem and Mineral Club and I own some and have cut and polished some. It is a soft stone, calcite, sometimes fluoresces and Some will take a good polish. It can break along the layers sometimes and the polish will wear down over time if worn a lot.
Thanks for your opinion. There are many others that agree with you. I appreciate you giving your qualifications along with your guess. It's sometimes difficult to decide how much weight to put on each response otherwise.
Do you have stuff like this in Wisconsin?
Looks like a calcified coral perhaps. The Lower Peninsula has an abundance of fossilized creatures of all sorts.
I see one of the geologists said travertine and that's what I came here to say! I saw a video about deposits like this 😁
I'm not a geologist, but the darker layers look a lot like calcite. We have a lot of that here in Texas, which I'm sure you know was under the sea at one point. Very cool rock!
Calcite was going to be my guess as well!
Looks like something from a cave in Kentucky
It's a stunning piece. I live in S.E. Mich. never seen anything like it. It looks waxy like chalcedony. It also looks like maybe been around some iron with that brownish orange area. Can't wait to find out what it is! It's beautiful!
I'm hoping someone will be able to tell us more. Hopefully people will pass this along to geologists they know. I think I contacted seven geologists myself.
That is amazing, whatever it is!
Stromatoporoid, looks like it has mineral replacement that turned it into quartzy. I am going on what others have told me and I know little or nothing about geology. You can find these on US-2 about 15 miles east of the Mackinac Bridge across from the entrance to the Brevoort Lake Campground. There is a parking area there also. Look for beach glass as there was a dump on the shore of the lake many many years ago.
Thanks for the great clue. I appreciate you qualify your answer by saying you're not a geologist. I'm not either, and I don't mind everyone knowing that. I will definitely be stopping at Brevort Lake next time I'm on US-2. I have stopped at quite a few places along there and have never found anything except sand and pretty boring limestone.
It IS really neat!
So cool!
It looks like a cave formation, like flow stone. The brown part reminds me of some travertine I’ve found in Pennsylvania. I also spent a lot of time wxploring caves during my early 20s. I can’t think of anything else it might be. But I’m also not familiar with many rock from MI.
Thanks, a lot of other people have said similar things. We don't have many caves at all here. We have sinkholes though.
Beautiful
Its absolutely magnificent. I think its some kind of stramataporoid or stamatalite.
I don't know what it is but it's beautiful!
I belong to a couple of those groups. They all are very good at identifying a rock or fossil. I have found a lot in my short time of collecting. I've literally been collecting for about 9 months now. And they have helped me out a whole bunch. With identifying them, you do have to have very good pictures. Close up pictures, prestiging crystal clear pictures are the best.
It surprises me how many people will post really blurry pictures, and expect a good ID. There's more to identifying rocks than just looking at them, so even with great pictures, it's hard to do.
Looks like a massive chicharron
I thought the same thing lol
I wish! I love pork rinds.
It’s a beautiful rock. Hope someone can tell you what it is.
Beautiful! What ever it is. I hope you find the answer.
I’m not a geologist either but I love beautiful rocks. New hobby for me.
🙏🌎☮️♥️
Oh banded calcite. I have a box of those. Large chunks. I don't think it would tumble well, but I will try it anyway...
I don't think it would tumble well either. Where did yours come from?
@@MichiganRocks Somewhat common around here. Nearby limestone quarries I think, also upriver.
Try asking Shawn Willsey. He’s a geology professor and has a UA-cam channel. He seems to have your fun personality so I don’t think he’d mind being asked.
Done! Thanks fro the suggestion.
im just a pretty rock looker at'er and that is one. I hope you get a positive ID on it! Thanks for sharing, going to follow to see what she turns out to be. Good luck!!!
Calling Dr. Nat. Calling Dr. Nat. Stat.
Gorgeous
What a cool rock!! Thanks for sharing with us.
Thank you for sharing this rock with us.. It is a very interesting rock. Looks to my amature eye to be Agate & quartz.. Can't wait for you to find out what it is.. ~ I like the "Flow Stone" comment..
It's not agate or quartz because those don't react with acid like this did. Still no definite answer on what it is.
To me that looks like a banded calcite, but that could be my screen quality.
Facts, I think you are right. Calcite is made of calcium carbonate with would explain the reaction to acid.
Banded calcite andTravertine are basically the same thing but Travertine is formed near cold springs. We have Travertine with crystals like that. Beautiful!
@@user-rg2dn3kn3o from what I understand you are completely right. It would depend on the geology of the area.
WOW 🤯
That is amazing! I would love to see the rest of whatever that formation came from!
Me too!
I am such a novice I won’t venture a guess though I do have my opinions from all the different rocks I have seen. That is a stunning specimen that anyone would be lucky to have. Thanks for sharing it and to the person who brought it to you to identify. I’m just glad to have gotten to see it and great pictures Rob! You did a fantastic job to show it well! Thank you.
I wouldn't normally make a whole video out of a rock that someone brought to show me, but this one is just so amazing that I had to do it.
Oh wow😍❤️
It looks very similar to the bacon opal I've collected near Milford Utah. Also called bubble opal or candy opal, probably a few other names I'm not including.
Sounds like pretty stuff.
I was so glad to read your comment because I was thinking "Man, these close up shots look SO much like bacon!!" haha but nobody else mentioned bacon. Had no idea there was such a thing as "bacon opal" - that's awesome. Going immediately to google it!
My first thought was Stromatoporoid, I have a similar one, it's about the same overall size, with the same sized layers, it also has a base that was clearly attached to something where it started to grow. Mine is more rounded and Instead of white mine is orange with hints of green, it's translucent but not as crystalline looking as that one, however the rest of the similarities are striking.
Mine was identified for sure as a stromatoporoid, I'm guessing that if you do have it looked at in person that they will agree. I've got about a five gallon bucket full of various stromatoporoids, with three of them being close to this size and one larger, only one of the large ones is truly translucent although I have dozens of smaller ones that are and their colors are often the same as this one.
I have taken geology classes, but I can guarantee that they haven't helped me to identify much of anything. The internet and older text-books have helped, my geology classes while fun and interesting didn't have much to do with individual rock identification and where of no help identifying fossils, which are usually the trickiest.
And while the facebook sites are OK, I got tired of people bickering and no longer belong to any of them, fighting over rocks isn't for me. This is a relaxing hobby at least for me, not one I care to get bent out of shape over, which sadly seems to be some people's favorite pastime on facebook. And of course it doesn't help when people fight over rocks they don't have in their own hands to identify, which honestly causes a lot of pointless arguing and mistaken identification. I'm fairly certain if you post this on the Michigan rockhounding sites you will get the same people bickering over it and you will get the same four or five answers, none of them definitive.
Ps. Craig's video was really good and I have little doubt that he nailed it, but since I wanted to think that anyway, it could just be confirmation bias kicking in.
Wow, thanks for the detailed reply. There's one important reply you left out though, where did you find your large specimens? I have found quite a few stromatoporoids in Lake Huron, Lake Michigan, and I believe Lake Superior too. A couple were sort of similar to this, but much smaller.
You're right about Facebook. I have seen the bickering, but what also bothers me are the people who state things as fact when they clearly have no idea what they're talking about. I don't mind people of all knowledge levels responding, but it would be nice if they admitted that they are just making guesses instead of sounding so confident. I have made errors on this channel many times, though, so I try to be patient. I have still gotten some good IDs on Facebook if I'm patient and take some time to research the various things that are thrown out as suggestions. It also helps to get to know who some of the experts are and give more weight to their answers. I tried to do that here by making a special area for the geologists to answer.
@@MichiganRocks I found most of them North of Rogers City although there are some absolutely HUGE ones near Rockport, ones too big to possibly bring home. The one's around Rockport are not usually translucent at all, just limestone replacement, like the one that Craig showed with all the bumps on top.
Keep in mind I'm lucky to find a really nice big one once every couple of years and I walk the beaches a Ton and wade too, in fact the best ones were found in the water.
Your video was as good a way as possible to get an ID without having someone see it in person. Most of the Facebook posts, where people bicker, are over pictures that aren't very good and like you said they are so Positive they are right that it drives me nuts. I'm like, "it's a blurry picture" they didn't say how hard it was or where it was found but you KNOW it's XYZ? You are right though that you can get your rocks ID'd there, if you have the patience to sift through and kind of just ignore the guessing. They also post a lot of very pretty rocks, so that is cool.
@@smithdog4770 Thanks for the additional info. I know about the ones at Rockport but, as you said, they don't really look like this one. They're just opaque gray limestone.
It looks like calcite. Either cave or old hot springs where the water runs and deposits the mineral. Mammoth hot springs is an example. I have made cabs out of it. It is pretty soft. Hardness of 3.
Thanks, Connie.
I'm just an amateur rock collector but I have collected a lot of coral and some sponges and some of it has that layering and has crystalized. Nothing that big of course but several of my smaller pieces are very similar to that.
Yes, I have a couple smaller, similar stromatoporoids that I've found too.
Very interesting post. I hope you do an update if you ever figure it out for sure.
I'll post a comment here if I do.
My guess is calcite😊
Yet another, not a geologist. I agree that calcite is a strong possibility but the banding and crystalline formation is a big part of this one. I'm thinking hot spring.
You could try posting about it in a subreddit like r/whatisthisrock or other ones like it, they can be pretty helpful especially when you have one as interesting as this one
Do they allow people to post links to UA-cam videos there?
Travertine
And hot springs in that area😮😊, I think you are right. 🎉
Could be
Calcite deposited via hot spring.
I have a chunk of banded calcite with the same waxy look. Different colors than this, and from a cave. This formation looks like it came from an ancient geyser pool!
Could be calcite? Not really sure though.
You could try the Rockhound Rock Shop in Galesburg, MI...
That's a long way from where I live and this isn't my rock. Maybe Ray will take it for a ride.
@@MichiganRocks I was just there yesterday, and I thought I needed to pack a lunch just to see it all! Have you ever been there???
@@georgeelder8415 Nope. I rarely go to that part of the state.
@@MichiganRocks where are you nearly located???
@@georgeelder8415 I live in Alpena.
Looks very much as some of the calcite samples we have collected through The Alps and here on Sicily👍🏻 Very beautiful stone.
If it had been found in my area, I'd be sure it is layered calcite. I have a piece that is 83 lb, found it in central Europe.
That's the problem here. This sort of thing isn't usually found around here.
It’s actually broken chunk of a cave formation called flowstone. It’s made from precipitated calcium carbonate
I'm no geologist but it looks like a cave formation
👁👁 Happy to drop by
2:36
Looks like rocks from churt pits in Georgia..i live in Cloudland Georgia , on Look out mountain..not far from Summerville Ga..i may be mistaken , but the layers in the rocks look similar. I was born and raised in Michigan , however I do not recognize that rock as being from Michigan .
I have been to the Patty Quarry in Summerville. I see the resemblance, but I think this is a much different rock. I haven't seen anything like this from Michigan either, which is why I made the video. Hopefully it wasn't just dumped in the lake by someone.
I live in Spain, and we have a lot of Orange Calcite or Honey Calcite and this looks very very similar. It also has that layering.
Very bad for tumbling 😅
Yeah, I wasn't planning to tumble it. I think Ray would be very unhappy if I returned an ugly little rock when I was done. Thanks for the info on Spanish calcite.
What a fascinating rock! In some angles it reminds me of a honeycomb!
The comments seem to indicate a cave rock, would there be one at the bottom of Crooked lake?
I love rock collecting and found a great one at Plum Island beach MA this Spring…It was too heavy so my wonderful hubby carried it back for me 😁🥰
We have sink holes in Michigan, which means that there was some sort of cave or void under the area before it caved in. I don't know if there are any sinkholes near Crooked Lake or how a rock would rise up out of one.
The crystal formation looks just like calcite. If so, it is very soft. A tiny scratch test in a discrete location would tell you a lot. If it happens to be hard (mohs 6-7+) it would be a very exciting mystery.
I don't want to do that without permission. I could ask for permission, but I won't until a geologist asks me to.
Looks like coral to me . Maybe at one time the lake used to be a ocean ?? We have stuff like that around prince George B.C. but it's farther north to the fossil beds
There is a lot of fossilized coral in this area, but this doesn't look like the fossilized coral we find here.
That is a beautiful rock. And as I said in my previous comment. I don't know what that is but I am Very curious. I will be watching comments. I would love to know what that rock is. It is beautiful that man is blessed to be given to him by his grandfather. And even more so that His grandfather found that in the year 1919. That is super cool in awesome.🥰🥰🥰🥰
Yes, the story behind the rock is almost as fun as the rock itself. Ray told me that he has two older brothers and that his grandpa gave the oldest a 30-30 deer rifle, his next brother a BB gun, and he got a rock. He said he was not disappointed.
Hi there, I’ve seen something similar to this but not exactly the same of course and it was DelI jasper or commonly known as Porkstone because when polished and actually looks like a slab of belly pork LOL. I’m sure I’m not right about what yours might be but to me it looks a bit similar. I’m no geologist either, but I thought I’d mention what it looked like to me🙂
Every little clue helps out, so thanks for your input!
My guess is that it's a cool rock. That's the best i can do!
Nothing wrong with just appreciating the beauty. I do that all the time without knowing what rocks are.
Dolostone?
I agree that it is a cave fresh water calcite. Please note the layering signifying multiple successive episodes of depositing with some variation in chemical composition and density (because of compactness variation.) Also, please note the folding that resulted from applied tectonic movement and lateral compression.
While the acid test was decisive, this is usually the last resort to confirm a carbonate rock because it diminishes its quality. Thanks for sharing :)
Thanks. Is there a better way to confirm whether a rock is a carbonate? Fortunately, the acid didn't leave a noticeable mark on the rock.
I disagree the folding is from tectonic forces. Really looks like it's concentric growth outward. I'm sort of a geologist (geochemist) so not too confident but Craig's explanation above makes sense to me. If it were travertine from a cave, you'd expect it to fill in the lumps and bumps with relatively flat, horizontal layers. Also if you think about which way glaciers traveled, you'd probably not expect significant limestone caves north of the location you found it in.
@@madelinerosamond3174 Thanks, Madeline.
Hey, former Michigan Rockhounds admin here, though not a geologist, just fossil enthusiast. I haven’t watched Craig’s video yet, but my identification is stromatoporoid fossil as well. I could say this with almost certainty as I research a lot about them. This is a hugely spectacular specimen! Museum worthy. I have a very similar one but only about 3”x3” and far less showy. Stromatoporoids from the Upper Ordovician have a calcareous skeleton (made of calcium carbonate, hence the fizzing). Also, they form often in mound shapes like this one here. If you look closely you can see what would have been the small bumps called mamelons, as well as faint remnants of the pillar structure, and its broad growth bands.
That's interesting that you have a similar one. Is there a picture of it online somewhere? Than for giving your opinion.
This one has a similar structure to the one you have: commons.m.wikimedia.org/wiki/File:Stromatoporoid_fossil_(Columbus_Limestone,_Middle_Devonian%3B_Ohio,_USA)_2_(28135552738).jpg
This one here also has some similar features if you look very closely at yours: commons.m.wikimedia.org/wiki/File:Labechia_sp._(fossil_stromatoporoid_sponge)_(Elkhorn_Formation,_Upper_Ordovician%3B_south_of_Dayton,_Ohio,_USA)_3.jpg (
Calcite for sure, travertine or some other cave type formation. That is why it appears to be folded.
It looks like there are several caves north and east of Crooked Lake and having seen several sandstone stalactites and stalagmites caves in Texas I agree with the others here that say it's some sort of cave formation (travertine). It would be interesting to see the caves near the lake and see if maybe that's where it came from. They didn't exactly have the "no touch, no take rules" in 1919 that they do now 😊
Are you referring to the caves at Fibrin Quarry in the U.P.? mkc.caves.org/preserve_fiborn.html
@@MichiganRocks Nope. In looking at Google Maps it looks like there are two on Mackinac Island.
However, the caves on Mackinac Island were formed during the last ice age. They are sea caves (I guess, giant great lake caves) and probably don't have much travertine - at least the sea caves on the Canadian side don't. This is because they've only been exposed for~10 000 years so not long enough to form significant cave deposits. On the other hand, the Texas caves are very old and were never glaciated - a lot more time for stalactites and stalagmites to develop!
Taking the recent glaciation into account, I'm going with Craig and stromatoporoid.
@@madelinerosamond3174 thank you for letting me know! That's the kind of stuff you can't tell from looking at Google maps LOL!
@@madelinerosamond3174 I have seen one cave on Mackinac Island, but it was very shallow. Not the type of cave that has typical cave formations.
What i know ive learned mostly from this channel but it looks like giant agate bands to me, is that even possible and is it possible for the host rock to break away from the banding. Very cool though but my guess was quartzite lol prolly wrong.
Please don't use my channel as a way to learn geology! I know just a tiny bit about some local rocks. I'm better at teaching how to tumble rocks or make things out of rocks.
I am not a geologist, but I am confident that it is not an agate. Agates are a type of quartz and quartz doesn't react to acid.
Travertine does not only form in a cave environment. There are very large, shelf-like, surface deposits all over the world.
Although, ,the bicarbonate-saturated water that supplies the feeds the formation is most likely of subsurface origin. When the super-saturated water exits the subsurface into the atmosphere and outgasses some CO2, calcite is deposited. The layering suggests some sort of periodicity to the flow, maybe seasonal?
I was getting ready to comment and my power went out for 10 hours. Anyway, I've seen very similar looking rock deposits in Indiana where you also find geodes lying around on top of limestone bedrock. I've never seen a hunk that big, though.
That's interesting. A giant good like this would be amazing.
Could also be aragonite
Looks like a flowstone might be calcite
I shared this video with my daughter who is a geologist/soils PhD. She made a guess that it looks like an evaporite. If it's not travertine or some sort of cave rock, it's probably from some process of a lake or sea drying up and leaving concentric rings of material (gypsum, maybe) It really needs to be seen in person by an expert.
Thanks so much for passing this along to your daughter. I was hoping some of that would happen. Now if we can only get a few more to go on record with their best guesses, given the restraint of not being able to see it in person.
Long time caver. Geochemist. Almost certainly a cave formation called "flowstone". Calcium carbonate, like a stalagmite, but formed from water flowing along a cave floor, depositing calcite as it outgassed carbon dioxide.
If there is limestone in the area there's likely at least small caves too. This formed in one and probably weathered or washed out of it . Nice find!
@@timglover1765 There are a lot of sinkholes in the northern part of the lower peninsula of Michigan. The bedrock is all limestone in the area this was found.
Looks like it could be from the interior of a large geode.
I was wondering how I can send you pictures. I have some carnelian agat plus I think i have purple carnelian if that possible?
As I said in the video, I'm not good at identifying rocks.
It looks like it could be a stromatoporoidea or a stromatolites. They are very common fossils in northern Mich.. To find out get you glasses out and look for tiny cell structures at the base. These are tiny but can be seen as individuals. It appears to be calcite crystals. Sometimes these crystals appear in the voids left behind from animals, fish, or brachiopods, for example. A large cephalopod could also produce a large vug of crystals.
That's exactly what Craig said in his video. There's a link to it in the pinned comment. Those close ups at the end were taken with a digital microscope. They're basically just macro shots, but I didn't see any indication of this being a stromatoporoid.
@@MichiganRocks Sometimes these fossils deteriorate to the point that they loose the details of their original form while maintaining their overall shape. Then they are crystallized by the calcite in the water,. The amount of deterioration can affect the size and shape of the crystals. This is why the tiny cells may not be seen and the layers appear to be thicker than the original fossil. If you want to further investigate you could get a greater magnification of the base or cut it to reveal parts of the interior that would be worn less if it is solid enough to be cut. You may also consider that stromatolites grow in mounds and are not necessarily flat.
@@abcdef-kq2zg I can't cut this since it's not my rock. I think if it is stromatoporoid, it is crystalized to the point that it would be very hard to see the fossil details. I sure can't see them, even under magnification. It would be nice to have an expert take a close look at it. I'm hoping that a couple people I know will make it to Alpena this summer. If they do, I'll make arrangements with Ray to have them examine it in person.
Resembles an ornate raw travertine.
Looks like a stalactite. They have a very distinctive layered appearance. If you slab it you will find that it has a bubbly, swirly interior where the layers have built on each other. They are usually made of calcium carbonate and will sometimes turn into calcite.
I won't be slabbing this one because it isn't mine. It's too cool to slab anyhow.
Looks like banded calcite onyx to me
Chalcedony shouldn't effervess. Wow I probably spelled that wrong! Okay fizzz.
Fizz work for me!
@MichiganRocks And yes I majored in Geology
@@cheesegrits196 As long as you didn't major in spelling, it's okay.
To me it seems like it is a calcium carbonate like limestone. A carbonate like dolostone wouldn't react as strongly with the acid. Other people here have said it's a cave deposit like travertine which would be my best guess. I believe the bedrock is limestone around the location it was found so it wouldn't be surprising if there were some caves there.
Yes, I believe the bedrock is limestone in that area, but there are not a lot of caves in Michigan. There are sinkholes, but not caves. I suppose sinkholes mean that there were caves under the area before the sinkhole formed, but I think those would be under water. Do you know if formations like this can form in underwater caverns?
@@MichiganRocks I'm not an expert on this, I'll be honest. From the information I was able to find it seems like travertine can sometimes form underwater in lakes. Groundwater carrying dissolved calcium carbonate can precipitate it and form travertine if it enters an area with a lower or higher amount of carbon dioxide. I suppose it could be possible for travertine to form in underwater caverns this way.
@@iaintea It's an interesting idea.
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It looks like petrified wood that agatetized?
Cave formation.
Looks to me like banded calcite, but I'm interested to see what the professionals have to say.
Me too. I'm hoping for more of a debate among them to learn how geologists think.
That's amazing! Is it waxy or rough? Was some of that orange stuff translucent? Is it heavy for its' size? I spend a lot of time watching rock videos, and I work with a bunch of geologists, so I have questions.
@@vickieterry5730 That's sort of subjective, so I'm not sure how to answer. I wouldn't call any of it rough like sandstone is rough. It's not smooth though. One layer in particular is translucent and looks waxy to me. The other parts are not waxy in my opinion.
Could you share this video with the geologists you work with?
My geo friend said, based on photos and the acid test, he called it an evaporite, which can form calcite and also dolomite. I guess more fodder for discussion. Thanks Rob, I love your lake hunt, slabbing and polishing videos, and video quality, excellent content!
@@vickieterry5730 Thanks, Vickie.
I'll guess calcite from an ancient geyser pool.
Now that I've read the geologist's section... I also have a piece of fossilized conch (or something like a conch) that has that color and waxy look and rough edge. Please let us know, when you figure it out!
Ah, Craig's video answered it... the faint but definitely there "lumpy pattern" really leaves little doubt. Thanks for this brief adventure.
That’s a chunk of basalt if I’ve ever seen one
Apparently you haven't seen one.
Banded calcite
It’s from a cave
That is what I think as well.
If that's true, how would it have gotten to Crooked Lake? There is always the possibility that it was transported there by a human.
More than likely a human, but I study geology, geothermal, gemologists, ect ect, but without licking it I can’t tell for sure!
That rock is called a "Leaverite" You leave her right there. :)
Looks to me like a chip off the old "Stalactite" or "Stalagmite"..................
Looks like Baconite.
Ray thought it looked like fossilized meat, so you're not the only one with a thought like that.
Ancient reef
Not a geologist, although I think it appears to look like a calcified fossil. Do you have a test kit for a hardness test? This may help the geologist. Please share the answers from your geologist friends/family.
I don't have a commercial test kit, but I can try some basic things. The thing is, I don't want to scratch up Ray's beautiful specimen.
Well its waxy so maybe calcite and taverine of the top of my head
🙋♀️❤️
I'm sure I'm probably wrong. Can it be an Chalcedony agate?
Agate wouldn't react with acid like that.
منم میخوام از این سنگهای خوشگل