logicalrat
10
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2
Mysterious rock, front.
This was found in Coffee County, AL, half deep in the red clay on a hill in a field. Has interesting patterns of bumps and grooves. I like to pretend it's an alien rock. Any ideas on what it is?
Back.
Nothing special here... All is normal.
Horizontal
Notice the small bumps in a unique pattern beside the larger bumps to the right of the deep groove.
Groovy.
Could this occur naturally?
Weight.
15.53g. Feels pretty heavy in my hands.
Finding displacement.
Started with ~20ml.
Density = ~3.106g/cm3
The volume of water displaced looked like an even 5ml, so the density of our mystery rock is 15.53g/5ml = 3.106g/cm3. That's the best info I can provide. Unaffected by magnets.
nuushba
Looks like pottery to me. Probably Missippi Mound Builder Culture. Take it to a museum or university and they can help identify it
ianbopno
Dinosaur skin!
Pandapper
No clue what it is, but I like that you provided some data for people to go off of, especially mass, volume, and density! :D Good luck!
PunJedi
Looks like a broken piece of old pottery, honestly.
Scarekrow501
Pottery is the first thing that comes to mind. Others like it or is this the only one you found?
Metalhead47
The pattern looks like the skeleton of a sea urchin. Maybe a fossil? Looks too thick tho. Still gonna say sea urchin, paleontology that shit
bobaloo
Well you're definitely not a witch
hobostew
Looks like it could possibly be A petrified fossil of some sort? IDK?
PunJedi
Found this too doing a little search http://www.peachstatearchaeologicalsociety.org/index.php/8-pottery/100-alabama-punctated-pottery
comacomacomacomachameleon
Is there a local school with a geology department? Take it to them.
Fishnuggs
That little bit isnt nearly enough to make dragon scale armor
MrChiPigg
Fossil?
LynchlessMob
Post one more picture of the rock just in case I missed something.
okanimi
Aliens.
AlmostCertainlyNotPickles
Fossilized Braille
drlovely
https://www.google.com/webhp?sourceid=chrome-instant&ion=1&espv=2&ie=UTF-8#q=urchin%20shell
drlovely
easy
MadeOfSteel
I've held a sea urchin fossil. Not heavy. It could be metal
TrustyBoomerang
Hey, I'm a geology student. My best guess is that this is a piece of an echinoderm fossil (like some sort of sea urchin or sand dollar).
TrustyBoomerang
Replacement fossilization is when remains are dissolved (post burial) and the space left behind is filled with sediment (like a cast!)
squintish
That was my first thought too: fossil sea urchin fragment. It is important to note the collection location and rock strata of fossils.
TrustyBoomerang
DM me if you have more questions and I will try to help out!
TrustyBoomerang
More info: The radial symmetry stands out to me as being an echinoderm, the lack of shell material is due to replacement fossilization.