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Anonymous
Weird intrusion in rock? 2016-05-01 19:48:51 Post No. 8043502
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Weird intrusion in rock? 2016-05-01 19:48:51 Post No. 8043502
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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.
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View of the obverse side
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>>8043506
its a button. press it
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Different view of the top.
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>>8043511
press it
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>>8043511
Smash it open, there is a foreign object embedded in it, probably Chinese in origin. Ancient fortune cookie perhaps?
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>>8043502
That<s actually very weird and cool. I wish some has some insight as to what phenomenon could have created this peculiar shape.
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petrified wood with a knot in it?
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>>8043605
Bingo
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>>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.
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paleofag here
looks kind of like an iron concretion to me. some kind of mineral nodule maybe.
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Pumping for interest.
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>>8044095
Geofag here, this was my initial thought
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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.
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>>8043623
sounds cool, OP should take a MRI
Thread posts: 15
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Thread images: 3