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unusual shaped agates almost like vertebrate

rockhound.newmexico

By rockhound.newmexico
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rockhound.newmexico New Member

rockhound.newmexico

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so in the deserts of new mexico these were found. not anything I have ever seen here and was really curious what they are. they are agate based but shaped like vertebrate so I'm lost. any help would be greatly appreciated 

33b30cbb-614f-450c-bcc5-7a8aad63c4e9.jpg

8d5fd313-3e5d-41c9-8302-9f4ec375a183.jpg

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rockhound.newmexico New Member

rockhound.newmexico

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also these were not found in the same place they were collected from different areas of the state

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ynot Regular Member

ynot

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Do You know the age or formation of these finds?

Can You post pictures from more angles?

I think they are fossils, not just agate. (How did You determine the agate id? They look like calcite replacements to Me.)

Darwin said: " Man sprang from monkeys."

Will Rogers said: " Some of them didn't spring far enough."

 

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DPS Ammonite Regular Member

DPS Ammonite

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Check hardness. A steel knife blade will scratch calcite but not agate. 

 

It looks like the infilling of a concretion or infilling of a thunder egg where the outer layers have eroded away. Let us know where you found it and what type of rocks are nearby. If volcanic rocks are nearby and the rock is agate the rock probably is the center of a thunder egg. If calcite and found with sedimentary rocks then it probably is the center of a concretion.  

 

See this photo of the calcite infilling from a concretion from the Eagle Ford shale of North Texas.

P1020151 (1280x1274).jpg

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EMP Regular Member

EMP

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6 hours ago, rockhound.newmexico said:

so in the deserts of new mexico these were found. not anything I have ever seen here and was really curious what they are. they are agate based but shaped like vertebrate so I'm lost. any help would be greatly appreciated 

33b30cbb-614f-450c-bcc5-7a8aad63c4e9.jpg

8d5fd313-3e5d-41c9-8302-9f4ec375a183.jpg

 

Gypsum roses. Don't look like fossils to me, too crystalline.

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ynot Regular Member

ynot

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I have not seen this type of symmetry in thundereggs, Also, the "volcano" looking cones in the pictures have symmetrical rays at thier base.

They are not gypsum roses. Gypsum roses are a cluster of bladed calcite crystals.

 

Not an educated guess, but an internal cast of a sponge (?).

 

Tony

 

PS Will hold back any further thoughts until We get more information on these.

  • I found this Informative 1

Darwin said: " Man sprang from monkeys."

Will Rogers said: " Some of them didn't spring far enough."

 

My Fossil collection - My Mineral collection

My favorite thread on TFF.

 

 

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ynot Regular Member

ynot

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9 hours ago, rockhound.newmexico said:

 

also these were not found in the same place

 

Can You be a little more specific about the locations?

Darwin said: " Man sprang from monkeys."

Will Rogers said: " Some of them didn't spring far enough."

 

My Fossil collection - My Mineral collection

My favorite thread on TFF.

 

 

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rockhound.newmexico New Member

rockhound.newmexico

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so one was found in northern nm Santa Fe area another south nm Carlsbad area, and the 3rd was found while rockhounding in central nm around the Los lunas area

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TqB Regular Member

TqB

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10 hours ago, ynot said:

I have not seen this type of symmetry in thundereggs, Also, the "volcano" looking cones in the pictures have symmetrical rays at thier base.

They are not gypsum roses. Gypsum roses are a cluster of bladed calcite crystals.

 

Not an educated guess, but an internal cast of a sponge (?).

 

Tony

 

PS Will hold back any further thoughts until We get more information on these.

 

I agree they seem to be fossils and sponge is a good possibility, I'd like to see more closeups of one or two of them.

Tarquin

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abyssunder Regular Member

abyssunder

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I'm wondering if they couldn't be echinoid fragments, plates with mamelons ?

terminology

 

 

" We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. "

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fossilized6s Regular Member

fossilized6s

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I thought echinoid as well at first, but i do not have any experience with these fossils. I'm sitting this one out. Haha

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"There are those that look at things the way they are, and ask why.....i dream of things that never were, and ask why not?" ~RFK
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->How to spot a fake Trilobite
->How to identify a CONCRETION from a DINOSAUR EGG

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rockhound.newmexico New Member

rockhound.newmexico

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I'm working today unfortunately but I'll snap some close up pics and more of them so you guys might get a better idea 

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abyssunder Regular Member

abyssunder

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Thank you for the new pictures.

Just crossed my mind the biconoid-multiconoid agate variety, as a possibility. The Mystery of Biconoids

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" We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. "

Thomas Mann

My Library

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AncientEarth Regular Member

AncientEarth

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23 minutes ago, abyssunder said:

Thank you for the new pictures.

Just crossed my mind the biconoid-multiconoid agate variety, as a possibility. The Mystery of Biconoids

I was just typing out a reply when I saw this, they are Biconoids, NM is famous, as well as CA for having those uncommon type of thundereggs. 

 

The ones you found are the center, the rhyolite has eroded away, leaving the agate cores. 

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ynot Regular Member

ynot

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I really love this place!

So many unique things show up, and I get to learn something new on a regular basis!

 

Y'all really rock! (Pun intended.)

Darwin said: " Man sprang from monkeys."

Will Rogers said: " Some of them didn't spring far enough."

 

My Fossil collection - My Mineral collection

My favorite thread on TFF.

 

 

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rockhound.newmexico New Member

rockhound.newmexico

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That's it! thank you so much everyone for your knowledge and wisdom 

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