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Alright /b/, for once in your goddamn life give me an answer.

The stories and information posted here are artistic works of fiction and falsehood.
Only a fool would take anything posted here as fact.

Thread replies: 60
Thread images: 7

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Alright /b/, for once in your goddamn life give me an answer. Anyone smart out there? Trying to figure out what process made this rock. I found it years ago in a river bed in northeastern Kansas. The lighter part is composed of small shells and is much more abrasive. The darker part is much harder and smoother. Any ideas?
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Volcanic rock on the inside and sedimentary on the out. Probably went sedimentary, volcano (magma) then sedimentary ontop
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>>720046422
Are you sure it isn't just a shit from a stone troll?
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>>720046586
Even with the wrap around? Is it volcanic pushing into sediments?
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I would say it's a geode, but you lost me with the shells.
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>>720046791
The center looks like quartz so it could be a geode
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>>720046757
Might be the edge of the flow, or it could be a vertical thing where the magma pushed into a crevice
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>>720046646
No, it was a large area of crumbling rocks in a low river bank outside of Ft. Riley, KS. No way it's a troll
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My guess would be an igneous/metamorphic stone got buried by sediment that later became a layer of sedimentary stone. The layer eventually broke up exposing that cool rock you got there.
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>>720046921
This.

I'm a geology student at UT Knoxville.
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>>720046422
it's just a plain old sedimentary rock, trust me i'm a geologist.
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>>720046882
That's kind of what I'm thinking. This wasn't a small find, they were all over the place there. I'm now wondering how old it is.
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>>720046422
Think how a sedimentary rock forms. Particles of sand, critters, et cetera compact over time. So now think what would happen if there was a large chunk of rock somehow caught in there in the process.

Looks like you have some sort of Flint or chert there, coated in your pretty standard microfossil conglomerate.

>KSfag/Rock nerd
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>>720047137
>>720047168
Whereabouts in Ft Riley did you find it?
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Geology student here, that looks to be a fossilized nigger penis, look at the shape. my guess is that he was trying to fuck a river bed but drowned in the process, niggers weren't very smart back then.. come to think of it they aren't very smart now.
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>>720046921
Thirded
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I'm born and raised in Kasnas. We have rocks like that all over the place. This area used to be at the bottom of the sea. Limestone rocks with sea shells in them are a dime a dozen.

The house I grew up in had a limestone wall around the perimeter of the property and basically every single stone in the wall had sea shells in it.
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>>720046921
>>720047057
This is something I haven't thought of. I'll look into it. 'preciate it
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>>720046921
I´t can´t be an igneous stone in the center, its like a crystal, igneous stones usually are rougher.
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>>720047336
What part of the U.S. is kansas located?
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>>720047505
pretty much the exact middle
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>>720047240
You know where the River Walk is? When the trail takes a sharp right along the river back towards post, follow it until to find an easy way down to the river. You'll find the same rocks I'm talking about
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>>720047505
Dead center, geometrically.
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>>720046422
Photosynthesis
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>>720046422
Bout tree fiddy
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>>720047610
wtf why doesn't it have a coast???? i thought all states would have a coast
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>>720046422
It looks like a dick
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>>720047695
Do you have any idea how big the USA is? Kansas alone is almost the size of the entire UK...

Kansas 82,000 square miles
UK 94,000 square miles
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>>720047618
Been there. What you found is from something called the Wreford Limestone formation.
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>>720047336
I guess I just dont understand the hard solid surrounded by the course abrasive (sorry smart people, I'm in the Infantry, that's the best you get)
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>>720048029
Nice. I'll look that up, thank you
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>>720048029
>>720047618
So to answer your question, it's a Permian layer. Anywhere from 250-300million years.
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>>720046422
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>>720048029
You can do some amazing fossil hunting on the side of any random highway in Kansas. They cut through the hills so the road can remain flat. Just park your car and bring a hammer and start chipping away at the side of the cliff. Only takes like 5 minutes to find cool sea fossils. They are literally everywhere here.

I live in Lawrence KS but grew up in Salina KS which is about a 2 hour drive west. I probably pass 50 spots where the road is cut through the side of hill like what is in this picture on my drive home to see my parents.
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>>720048212
Now THAT is cool. I'm going to confirm that, but I'm also going to just believe that figure. I know it's not worth anything really, I just like learning about thing that have existed that long. Thanks all
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>>720048452
Not a problem. Are you stationed at that fort? I'm stationed elsewhere, but returning home to KS in August. Would be happy to geologically show you around.
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>>720048697
>Pic related.
Just a VERY small portion of my collection
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>>720048697
Not anymore man, I was for a couple years. I'm in Georgia now and I took this piece with me. Just found it again and wondering about it
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>>720049277
Oh gotcha. I'm in Mississippi at them moment. DD-214 come August
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Petrified dinosaur shat
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>>720049496
> confirmed.. I see a peanut
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How come no one mentioned Thunderegg...?

https://en.wikipedia.org/wiki/Thunderegg

>Oregonfag here
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>>720046422
That long piece might be a yheti dick
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>>720049046
Nice collection OP. I have a free miners licence and that stone looks like quartz or calcite in the center and maybe white quartz on the outside. Could you take a better picture of the outer layer and inner I could see clearly? If it is quartz then I would guess that it's a peice of a vein that was eroded from a larger portion of softer bedrock and tumbled in water to give it the rounded outer shape. I don't think the North American glaciers pushed down as far as you live but it could very well be a peice that has slowly made its way down from up north and be an original peice of glacial till
>copper deposit I found
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>>720049403
Jealous of that collection though. KS was always really interims to me, especially the freeways. As flat and borring as it seemed, you could always just look at whatever hill the road was cutting though and see millions of years just sitting there. I loved that
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>>720049631
Ancient alien suppository
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>>720049631
Fuck yeah, Oregonite here too
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Geologist here

Looks like a geode that became totally saturated in water, this instead of forming crystal faces like a normal geode it just filled in
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>>720049631
Because it's sedimentary. Thundereggs are pretty much exclusively agates. You can find some in Kansas, but usually further west, near the smoky hills chalk formations
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>>720046422
Ordinary river rock with an accumulation of aquatic life on it.

This is how coral reefs start.
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>>720046422
That's a dinosaur cum ball, frozen for all of time.
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I'm glad to see that this place still has the random conglomerate of worthless shit interposed with actual good info. I appreciate it
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>>720049758
Yeah, northwestern kansas is huge for rocks, especially fossils. Found almsot an entire Xiphactinus, a large portion of a plesiosaur, and one of three Ptychodis Mamilaris sets in the world. One from AUS(3 teeth), one in US(2) and then the one my father and I found... 60+teeth ;)
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>>720049873
That very well may be the case.
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>>720050180
You spelled cocks wrong
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GOD MADE IT

:)
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>>720049883
Please elaborate. Some anons have posted it looks like quartz (and I would agree) in the center which would fit the definition of a thunderegg.

OP's pic is blurry as shit, though. And I'm far from a geologist.
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pretty cool thread, Its amazing how 4chan does have real deal specialists in crazy fields that just happen to help out a random poster.

also the fossilized dick jokes, I like them too.

>I saw a thread about nuclear reactor engineers talking shit about each other type of designs.
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>>720046422
chert in a limestone matrix. Sedimentary stuff
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>>720050453
Google images search 'chert'. It's not quartz.
Thread posts: 60
Thread images: 7



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