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Offline sashaTopic starter
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« on: April 23, 2010, 10:30:21 am »
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Hi all!
I found these not far from the my last finds of fossil corals.
In photo at right and down is the stone looking like silicified dinosaur bone.
Are there familiars with such fossil?

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« Last Edit: April 23, 2010, 10:32:26 am by sasha » 		Logged
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« Reply #1 on: April 23, 2010, 10:16:36 pm »
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 Undecided
may be a whale bone?

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Offline sashaTopic starter
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« Reply #2 on: April 25, 2010, 12:20:03 pm »
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No, Eli, more close to dino bones:
 

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http://www.bernardine.com/gemstones/dinobone.htm


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« Reply #3 on: April 29, 2010, 10:46:13 am »
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Well a good start would be to look at some geology maps and see what formation they came from. Usually you can find a book from the bookstore or library called "Road Side Geology" It?s a great book to have and I think they make them for every state. If they are in the Triassic, Jurassic, Cretaceous then there is a good chance you may have dino bone but you can find wood there too.
A good way to know if you have bone is to look at the cross section and see if you have larger pores in the center then moving to smaller pores to the outside then to solid outer layer.  See pic of a cross section of dino bone.  Some fossil woods do not have rings like tree ferns or tree fern like trees.  they simple have pores all over with a solid outer layer.
I hope this helps some.

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« Reply #4 on: April 29, 2010, 10:53:44 am »
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 Great nice finds

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« Reply #5 on: April 29, 2010, 11:16:51 am »
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either way,cool!

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« Reply #6 on: April 29, 2010, 07:29:45 pm »
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Carcusrex wrote: "Well a good start would be to look at some geology maps and see what formation they came from. Usually you can find a book from the bookstore or library called "Road Side Geology" It?s a great book to have and I think they make them for every state. If they are in the Triassic, Jurassic, Cretaceous then there is a good chance you may have dino bone but you can find wood there too."

Carcus, that's a great suggestion (seriously, it is ), but it won't help Sasha.  He lives in Armenia and I don't think that Mountain Press Publishing has brought out Roadside Geology of Armenia yet.    The principle of the the suggestion is good, though---referring to a detailed geological map of the area would help.    And a good example of your remark that some fossil woods do not have rings, but just pores is fossilized palm wood.

BA

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« Reply #7 on: April 29, 2010, 08:22:51 pm »
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sasha,Nice finds. The coral will make nice jewelry. We have fossilized (aggatized) coral here in Tampa bay. It is prized for the quality and sought after by jewelry makers world wide. Only problem is the one location where it is found is now closed and has been for several years...Just as a side note The native americans prized this coral too. They made arrowheads from it that were for trade. When I lived in Texas I saw some in local collections. There is lots of fossilized coral in this area but little of it is of lapidary quality.Regards, gambol Cool

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http://www.apalachee-minerals.com/Agatized_Coral/agatized_coral.htm

This is one of several links on the web. The tampa bay rock club also has a site. None of these photos show the close up detail of the coral structure that is so unique. chalcedony geodes are rather common and it is difficult to tell coral from non coral unless you see the close up stucture of the individual polups. The age is miocene, younger than dinosaurs but about right large mammals.Think Mammoth. I must correct what I said in my previous post. Much of the coral is lapidary quality but not as prized as the Tampa bay ballest point coral.

fossilized palm wood is found in abundance in this area. The aragonite version is a scaly fossil with radially apparent linearfiber bundles. I have one in my yard.

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« Reply #8 on: April 29, 2010, 08:30:52 pm »
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Either way thats cool. I think you could use a uv light and see what cooler it shines. I am thinking a yellow to white color is bone but petriefied wood can be differnt colors. But I may be wrong someone here will correct me if I am.

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« Reply #9 on: April 29, 2010, 08:52:01 pm »
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Quote:Posted by bbwfw
Either way thats cool. I think you could use a uv light and see what cooler it shines. I am thinking a yellow to white color is bone but petriefied wood can be differnt colors. But I may be wrong someone here will correct me if I am.


Consider yourself gently corrected.   The color under UV is going to depend upon the wave length of UV light used and the mineral content......which could be the same for both fossilized bone and fossilized wood......but it still could be cool to look at that way.

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