I found a rock with a really odd feature. It's a small conical protrusion with concentric circles around it going down into the rock; the opposite side has the same, but less prominent.
I think it was found in the lower Morrison Formation.
Anyone have a clue what it could be? My friend thought if was a fossil, but I think it's an igneous rock. Not sure.
View of the obverse side
>>8043506
its a button. press it
Different view of the top.
>>8043511
press it
>>8043511
Smash it open, there is a foreign object embedded in it, probably Chinese in origin. Ancient fortune cookie perhaps?
>>8043502
That<s actually very weird and cool. I wish some has some insight as to what phenomenon could have created this peculiar shape.
petrified wood with a knot in it?
>>8043605
Bingo
>>804350>>8043590
Physical Geo student here, looks like basalt. I can defenitly say that the central rock is an inclusion not an intrusion andtherefore is older than the surrounding rock.
paleofag here
looks kind of like an iron concretion to me. some kind of mineral nodule maybe.
Pumping for interest.
>>8044095
Geofag here, this was my initial thought
Petrified wood/roots left microcavities in the material, water was dripping onto and through the material at regular summer/winter intervals giving a ringlike intrusion on one side, and ringlike protrusions on the other.
That's my guess.
>>8043623
sounds cool, OP should take a MRI
