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Gimme

Old Fossil Hull

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Gimme

This is a unique looking items from my fathe r's collection of (maybe) fossils found in the Eastern part of Massachussetts near coastlines. I was wondering if this is special or even a fossil at allIMG_1749.thumb.JPG.419035411bb7c005011d1ff941c9ee27.JPG. Thanks.

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GeschWhat

Oncolites perhaps? 

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ynot

Welcome to TFF!

This does not look fossil to Me.

Maybe an oolitic limestone(?)

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DPS Ammonite

If it is not limestone, (check harhdness) which I do not think that it is, it is orbicular rhyolite/jasper. Quartz and feldspar sometimes crystalize in radiating needles in silicious volcanic rocks. See Google images: https://www.google.com/search?q=orbiculaR+RHYOLITE&source=lnms&tbm=isch&sa=X&ved=0ahUKEwiapcHq2NvcAhWTJHwKHZfiA7QQ_AUICigB&biw=1152&bih=654  See image from Gemgazer.com.Image result for orbiculaR RHYOLITE

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ynot
7 minutes ago, DPS Ammonite said:

, it is orbicular rhyolite/jasper. Quartz and feldspar sometimes crystalize in radiating needles in silicious volcanic rocks.

I thought that also, but eastern Massachussetts  is not known for volcanic rock.  

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Rockwood
25 minutes ago, ynot said:

I thought that also, but eastern Massachussetts  is not known for volcanic rock

Just upwind glacially speaking there is a whole lot of granite. Some of that could have made it to the surface back in the day.

This looks igneous, or extremely metamorphic  to me.

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Rockwood

Holly jumpin' chertified pisolitic bauxite !

I think he's got something there. :)

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Auspex
1 hour ago, Rockwood said:

I think he's got something there. :)

Doesn't he usually?
:D

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Rockwood
9 hours ago, Auspex said:

Doesn't he usually?
:D

Definitely, but try rattling off that phrase when folks are surprised by something and see how long it takes for someone to turn and say 'huh?' 

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daves64
14 hours ago, Rockwood said:

Holly jumpin' chertified pisolitic bauxite !

I think he's got something there. :)

Chertified... Wouldn't that make it a chert pseudomorph after pisolitic bauxite? Or would that be Pisolitic bauxite pseudomorph after chert? Try saying that fast... :zen:

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minnbuckeye
11 hours ago, Auspex said:

Doesn't he usually?
:D

@Auspex, I would replace usually with ALWAYS!!! At least he ALWAYS amazes me.

 

@Gimme, looks like a great piece to polish! Especially after seeing: 5b6a112a92ec4_Chertified_pisolitic_bauxite_(wet_cut_surface_11.7_cm_across)_from_Arkansas_USA.jpg.5fddd28c1f196a2bf1fbb94536a76b9b.jpg

 

 

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Auspex

All in all, this is an unusual and fascinating specimen, and I thank @Gimme for bringing it to TFF!

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