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Post by colorshapetexture on Mar 11, 2010 12:02:43 GMT -5
I have a few Montana agates that show a lot of different interior formation phenomenons. Saw Beck and Joe and quite a few of us into or getting into agates. Dont want to hijack their threads so....... Like this one. The basic rock was an agate glob about two fists. Yet it has these tubes running inside it. And the stress fractures you see are from the boytroidal exterior being formed. And what would you call it besides a Montana? LOL Took the photo while it is at 600 grit so the shine didnt take over. Will repost when I set down and finish the next 4 polish stages. Attachments:
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Post by colorshapetexture on Mar 11, 2010 12:06:56 GMT -5
Then there is this one. This was just a piece I got in trade with a guy in Alaska. The darn thing is negative boytroidal. What do they call this? I guess this is going on in the formation of all agates its just visible in a few? Attachments:
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Post by xtldggr on Mar 11, 2010 12:16:01 GMT -5
See Bra-Zeal thread
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Post by colorshapetexture on Mar 11, 2010 13:08:56 GMT -5
Yes Beck. They are like little 3/4" X 1/8"cigar shape tubes running in it. If you slab the agate in the other direction it is ugly.
Thanks for the contact thing on the second one..Jim
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Post by colorshapetexture on Mar 11, 2010 13:19:14 GMT -5
Check this out.. The same orbs in the pores of petrified palm tree. Attachments:
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Post by xtldggr on Mar 11, 2010 15:01:54 GMT -5
Rebecca you couldn't drive me crazy,  There is nothing I enjoy more than a bunch of rock geeks spouting off!! As to the orbs in the palm wood, they are often created by worms that consume part of the wood prior to burial and petrification. xtldggr |
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Post by rickb29212 on Mar 11, 2010 16:11:37 GMT -5
John. Could some of them be created by the roots of the palm? Rebecca you couldn't drive me crazy, There is nothing I enjoy more than a bunch of rock geeks spouting off!! As to the orbs in the palm wood, they are often created by worms that consume part of the wood prior to burial and petrification. xtldggr |
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Post by xtldggr on Mar 11, 2010 18:38:05 GMT -5
Hi Rick,
Having not seen the specimen in person is hard to say for sure if these are root scars, but it is not out of the realm of possibilities.
Careful examination of the specimen should however clarify this and if the piece is destined to be cut it could be determined for sure. Lets say that upon cutting the specimen you observed that the ovate shapes did not penetrate the specimen and as you cut deeper the markings were no longer visible, it is possible these were root scars. If howeever you were to cut this specimen and observed that the ovals continued through out the piece it could be intepreted to be worm burrows. You see as the worm eats it way through the wood it leaves behind its excrement filling the void created with organic rich material which is compositionaly different ffrom the wood as it has been altered by the worms digestive actions; hence the differnt color. As in any petrification process the wood along with the excrement filled worm holes would be buried and if conditions were just right a petrified specimen would result.
Take care, see you at the Reel
John
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There is nothing I enjoy more than a bunch of rock geeks spouting off!! As to the orbs in the palm wood, they are often created by worms that consume part of the wood prior to burial and petrification.