Deleted
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Post by Deleted on Jul 6, 2022 19:10:43 GMT -5
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aGates
spending too much on rocks
Building a silver studio
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Post by aGates on Jul 6, 2022 20:08:31 GMT -5
I think dude! That's rad and I woulda drug it home too. All me crazy bit I can see why you thought pet wood. I dunno but I'm leaning that way. Sure looks like heart wood in the middle And growth rings along the outside. You need some slabs cut outta it. Know anyone with a 24 incher!
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hypodactylus
spending too much on rocks
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Post by hypodactylus on Jul 6, 2022 20:27:03 GMT -5
Looks a lot like petrified wood to me, but what do I know. Very nice!
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Post by Deleted on Jul 6, 2022 22:11:48 GMT -5
aGatesThanks. I wish I knew someone with a saw that big! Really contemplating weather I should keep it intact or bust it up for tumbling. Leaning more towards keeping as a specimen. It’s pretty big and cool like it is. I should probably ask jamesp his thoughts on it. He’s very familiar with petrified wood. What do you think Jim?
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Post by Deleted on Jul 6, 2022 22:13:59 GMT -5
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Post by jasoninsd on Jul 7, 2022 1:01:45 GMT -5
aGates Thanks. I wish I knew someone with a saw that big! Really contemplating weather I should keep it intact or bust it up for tumbling. Leaning more towards keeping as a specimen. It’s pretty big and cool like it is. I should probably ask jamesp his thoughts on it. He’s very familiar with petrified wood. What do you think Jim?
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Post by Deleted on Jul 7, 2022 3:36:24 GMT -5
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Post by RickB on Jul 7, 2022 5:00:59 GMT -5
Just by the looks of it only, I'm going with some kind of banded chert.
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Post by fernwood on Jul 7, 2022 5:28:44 GMT -5
I agree with banded chert. Possibly Stromatolite.
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jamesp
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Post by jamesp on Jul 7, 2022 5:38:29 GMT -5
Great find Ashley. It obviously has characteristics of pet wood and some attractive chalcedony-like silicification. It is large suggesting it may be a section of a tree. It looks promising ! A few side photos would help - does it have a bark looking perimeter and vertical sides ?
And it is certainly this type of quartz:
"Cryptocrystalline is a rock texture made up of such minute crystals that its crystalline nature is only vaguely revealed even microscopically in thin section by transmitted polarized light. Among the sedimentary rocks, chert and flint are cryptocrystalline."
It seems to be a cylinder instead of a round or oval nodule. Chert can form oval and less commonly round nodules with bands that can look like pet wood but rarely is it cylindrical. If that is a chert nodule it is certainly a large one.
Wood can be replaced or filled or casted, there are various ways it can become 'petrified'. For that reason it can be a challenge to prove it to be pet wood. It can fill so many different ways with so many color variations of silica and patterns.
I suggest returning to that location and finding more samples similar to it. And would be anxious and excited to find more like it ! If there is one there is probably many more. If it was found in a creek or a river it could have been transported and a random find. I believe you live fairly close to the Great Lakes where there may be a lot of glacial transport. Glaciers in that area are known for moving rock all over the place from long distances.
This fellow gives a great educational speech about the various ways pet wood can be formed. It may help you with ID.
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jamesp
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Post by jamesp on Jul 7, 2022 5:43:45 GMT -5
Looking at the right side of the first photo gives the impression that that may be a the outside edge of a round chert nodule Ashley. But it sure could be wood that may have had a rotted out center.
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Post by Deleted on Jul 7, 2022 8:22:54 GMT -5
jamespI love chert Jim, so if its chert I’m still happy! I would dig more around there but it’s a park and the kids and I got lucky with no one being there yesterday lol. Thank you for the video and the knowledge! I will take some side shots and post them later today or tomorrow.
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jamesp
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Post by jamesp on Jul 7, 2022 9:09:13 GMT -5
jamespI love chert Jim, so if its chert I’m still happy! I would dig more around there but it’s a park and the kids and I got lucky with no one being there yesterday lol. Thank you for the video and the knowledge! I will take some side shots and post them later today or tomorrow. If pet wood(or such nice chert) it may be a large deposit. Sure would be nice if there was a creek or river close by with collecting access. Us poor easterners don't have all that exposed desert to collect from.
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Deleted
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Post by Deleted on Jul 7, 2022 14:36:33 GMT -5
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Post by rmf on Jul 8, 2022 4:36:44 GMT -5
Given your location I have doubt as to it being petrified wood. My opinion would be that it is a chert replaced stromatolite. Possibly just a chert nodule similar to Mozarkite in Missouri. I am assuming Northern IL origin.
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jamesp
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Post by jamesp on Jul 8, 2022 5:14:44 GMT -5
Given your location I have doubt as to it being petrified wood. My opinion would be that it is a chert replaced stromatolite. Possibly just a chert nodule similar to Mozarkite in Missouri. I am assuming Northern IL origin. ashley the edge photos didn't reveal much in the way of wood but that doesn't mean that much as far as ID of wood. Let's just say nothing looked obvious. rmf and the others may have the best ID being a strom or a chert nodule. The Great Lakes has a super diverse geology due to Glacier transports and local impact sites. Fun place to collect no doubt.
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jamesp
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Post by jamesp on Jul 8, 2022 5:16:36 GMT -5
PS That is a heck of a chunk to carry !
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Post by jasoninsd on Jul 8, 2022 5:31:43 GMT -5
PS That is a heck of a chunk to carry ! Shouldn't have been a problem...she has five kids...so basically a sled team! LOL *Just teasing Ashley!
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jamesp
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Post by jamesp on Jul 8, 2022 6:16:12 GMT -5
Lol. so true jasoninsd. Or if keeping up with 5 kids she may have been carrying the youngest and the 40 pound chunk of rock at the same time !
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Deleted
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Post by Deleted on Jul 8, 2022 8:07:08 GMT -5
jasoninsd jamespLol! That’s true!! It was heavy but my 11 year old daughter actually carried it to the car before I could. She’s a tiny thing but mighty and strong! 💪
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