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Post by Garage Rocker on Nov 14, 2017 13:01:45 GMT -5
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Post by rockjunquie on Nov 14, 2017 13:19:25 GMT -5
Very cool! I'm no expert, but those yes makes me think of palm, maybe from CA.
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Post by Garage Rocker on Nov 14, 2017 13:34:25 GMT -5
Very cool! I'm no expert, but those yes makes me think of palm, maybe from CA. Palm was what came to my mind, but what do I know?  |
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Post by rockjunquie on Nov 14, 2017 13:37:07 GMT -5
Ha! Ha! I meant to say eyes, not yes. My typing sucks.  |
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Sabre52
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Post by Sabre52 on Nov 14, 2017 16:24:03 GMT -5
Looks like pet fern to me. Fern has those eyes with the C-shaped structures mixed in with vascular bundles. Nice example of that C shaped structure just off center in the last pic. Rare find!....Mel
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Post by MrMike on Nov 14, 2017 17:21:39 GMT -5
Reminds me of petrified dinosaur smegma. Quite rare.
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Post by pauls on Nov 14, 2017 17:54:32 GMT -5
Reminds me of petrified dinosaur smegma. Quite rare. Yeeeuw, urk. Palm or fern or wood does it for me too. |
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Post by Garage Rocker on Nov 14, 2017 18:06:42 GMT -5
Looks like pet fern to me. Fern has those eyes with the C-shaped structures mixed in with vascular bundles. Nice example of that C shaped structure just off center in the last pic. Rare find!....Mel I see the 'c'. Thanks for the ID help, Mel. |
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Post by Garage Rocker on Nov 14, 2017 18:08:44 GMT -5
Reminds me of petrified dinosaur smegma. Quite rare. Just where have you seen that before, Mike? |
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Post by MrMike on Nov 14, 2017 18:29:03 GMT -5
Only seen one specimen online several years ago since it’s so rare, can’t seem to find the link again.
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Post by Garage Rocker on Nov 14, 2017 20:07:06 GMT -5
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Sabre52
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Post by Sabre52 on Nov 14, 2017 21:18:32 GMT -5
Tempskya is found at several US locations so would be a very good bet for the type of fern. Fish dropped a good'un in that box for ya, that's for sure. Awesome and valuable specimen....Mel
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Post by Garage Rocker on Nov 15, 2017 2:56:18 GMT -5
Tempskya is found at several US locations so would be a very good bet for the type of fern. Fish dropped a good'un in that box for ya, that's for sure. Awesome and valuable specimen....Mel He was the first one I asked. Said he hadn't a clue what it was. Guessing it wasn't suppose to be in that box of 'agates'. Glad it was!  Thanks Fish! |
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Post by Garage Rocker on Nov 15, 2017 11:28:20 GMT -5
Found an interesting article on Tempskya, a tree fern from the Cretaceous. The fossil I have appears to be the false trunk from this genus. The cross sections shown in the article look like the exposed ends of the specimen in my photos above.
The 'c' shape structure Mel Sabre52 pointed out is the petiole branching off of stem structures. 
Roots at 40x magnification. 
From the article:
The false trunk of the tree fern Tempskya is intriguing with its intertwined rope or cable-like structure of roots, stems and petioles. The extensive distribution of Tempskya in the Northern Hemisphere and its discovery in the Southern Hemisphere provide evidence of its ecological importance. One can imagine the highly evolved herbivorous dinosaurs of the Cretaceous seeking out the foliage growing along the false trunks of Tempskya.
The profuse branching of stems and roots as well as the frequent formation of leaf traces, frozen in time by silica, provides dynamic evidence of ancient growth in most Tempskya specimens. For collectors, knowledge of Tempskya anatomy may provide insight into specimens within their collection. What part of the false trunk does the specimen represent? Is there evidence of insect feeding? Can one identify a stem or root dividing, petioles forming or roots invading stems? Permineralized specimens with excellent cellular preservation can provide a snapshot of ancient plant growth. Imagination fueled by empirical evidence; a true joy of science.
Here is a link to the article from 'The Virtual Petrified Wood Museum' Tempskya |
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Deleted
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Post by Deleted on Nov 15, 2017 13:07:09 GMT -5
My first thought was tempskya, too. I'd suggest cutting across the base first to get an idea of what is inside. Cutting along (instead of across) the tubes/grain doesn't usually yield great patterns. If you can narrow down its origin, it might be worth more as a specimen than slabbed up.
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Post by Garage Rocker on Nov 15, 2017 13:14:10 GMT -5
My first thought was tempskya, too. I'd suggest cutting across the base first to get an idea of what is inside. Cutting along (instead of across) the tubes/grain doesn't usually yield great patterns. If you can narrow down its origin, it might be worth more as a specimen than slabbed up. I don't have a slab saw, only use a Harbor Freight tile saw. I'd hate to mangle the thing, so I'm happy enough just imagining this is what it looks like inside.
Besides, I'd just end up tumbling it anyway.  Much cooler to leave it as is.
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Sabre52
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Post by Sabre52 on Nov 15, 2017 14:41:04 GMT -5
Yep, awesome specimen. If I did anything to it, I'd just cut across the end to show internal structure and polish it like that. That would definitely enhance it's value. Maybe you have a friend nearby with a good saw to make you a smooth cut for a display piece....Mel
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Post by Deleted on Nov 15, 2017 22:31:53 GMT -5
I had a couple chunks from Greenhorn, Oregon that looked very similar to yours in shape and color. The outsides also looked like they had tumbled in a stream at some point over the millennia. Sold them, thinking I might find another with better exterior details - I was wrong. Some pieces are crumbly, but yours looks solid and should stand up to having a slice off the bottom as Sabre52 suggested. Yours does have some interesting surface features, so I wouldn't blame you if you decide to keep it whole.
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Dr DG
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Post by Dr DG on Nov 15, 2017 22:39:59 GMT -5
Tempskya is found at several US locations so would be a very good bet for the type of fern. Fish dropped a good'un in that box for ya, that's for sure. Awesome and valuable specimen....Mel He was the first one I asked. Said he hadn't a clue what it was. Guessing it wasn't suppose to be in that box of 'agates'. Glad it was! Thanks Fish! Just wanted some rocks to go to a good home. you need to cut it and show us whats inside, |
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Post by Garage Rocker on Nov 16, 2017 0:22:08 GMT -5
He was the first one I asked. Said he hadn't a clue what it was. Guessing it wasn't suppose to be in that box of 'agates'. Glad it was! Thanks Fish! Just wanted some rocks to go to a good home. you need to cut it and show us whats inside, Thanks again! I'll work on that. |
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Thanks Fish!
Much cooler to leave it as is.
