RWA3006
Cave Dweller
Member since March 2009
Posts: 4,207
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Post by RWA3006 on Jan 2, 2023 18:33:27 GMT -5
agatewhisperer well look at that! The middle photo shows two limb ghosts, and one of them is a real good one! I hope the others are as good when you cut them. eta... there's another ghost limb at 12 o'clock in the top photo that was bisected by the saw.
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Post by agatewhisperer on Jan 2, 2023 20:58:11 GMT -5
RWA3006 thanks! I just realized the interesting thing about cutting it this way is that you can also see the bottom. Here it is below. By the way, noob question... What is a limb ghost? Sorry if that's already posted at length.
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,207
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Post by RWA3006 on Jan 3, 2023 0:06:50 GMT -5
agatewhisperer It's the ghostly remnant of a tree limb cross section that the hadrosaur ate that was not fully digested, somewhat analogous to corn kernels in poo now days. You can actually count the rings of the wood in your "stool sample." That's what probably prompted 1dave to exclaim it is museum grade, which I would say is true. The scientific community has known for a while that leaves and tree limbs were staples of the hadrosaur diet and pines and other evergreens were prominent at that time. I'll find a photo to post that has a cross section of a petrified limb from the Blue Forest in Wyoming along side a cut of coprolite so you can see the similarities.
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,207
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Post by RWA3006 on Jan 3, 2023 0:07:28 GMT -5
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,207
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Post by RWA3006 on Jan 3, 2023 8:08:31 GMT -5
TURD TUESDAY
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Post by RickB on Jan 3, 2023 11:45:57 GMT -5
TURD TUESDAY Thanks has to go out to the dung beetles that helped brighten and enhance that coprolite and make this possible.
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Post by 1dave on Jan 3, 2023 12:04:43 GMT -5
when is Dung Beetle award Night?
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,207
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Post by RWA3006 on Jan 3, 2023 14:18:15 GMT -5
when is Dung Beetle award Night? Maybe Dr. Seuss thought beetles battled for awards?
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Post by jasoninsd on Jan 3, 2023 17:26:09 GMT -5
when is Dung Beetle award Night? Maybe Dr. Seuss thought beetles battled for awards? They do have the Cannes Film Festival...maybe this would just be "Going To The Can" Festival! LOL
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,207
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Post by RWA3006 on Jan 5, 2023 8:02:58 GMT -5
Here's one that had numerous voids filled with calcite crystal. If the light and photography were better you could see the undercutting from the polishing process, the calcite being softer than the hard agate surrounding it.
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,207
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Post by RWA3006 on Jan 5, 2023 8:03:38 GMT -5
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Post by 1dave on Jan 5, 2023 8:48:41 GMT -5
Here's one that had numerous voids filled with calcite crystal. If the light and photography were better you could see the undercutting from the polishing process, the calcite being softer than the hard agate surrounding it. That is valuable information on the petrification process! That means each fill sequence occurred shortly after a major earthquake in the region. The silica precipitated first, adhering to the channel surfaces, then the calcite crystalized in the remaining space, the same process as in geodes. Iron = yellow citrine, brown limonite, red hematite, black goethite.
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,207
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Post by RWA3006 on Jan 8, 2023 10:26:07 GMT -5
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,207
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Post by RWA3006 on Jan 8, 2023 10:26:49 GMT -5
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Post by jasoninsd on Jan 8, 2023 11:53:29 GMT -5
For some reason when I see pieces like this one, "cave paintings" instantly come to mind.
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,207
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Post by RWA3006 on Jan 8, 2023 12:36:13 GMT -5
For some reason when I see pieces like this one, "cave paintings" instantly come to mind. They remind me of deep space photos of galaxies and nebulae.
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Post by hummingbirdstones on Jan 8, 2023 14:31:09 GMT -5
That one is indeed glorious, Randy!
Looks like a sea anemone to me.
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Post by rockjunquie on Jan 8, 2023 16:41:44 GMT -5
That is an amazing pile o' poo. I see a creature from HP Lovecraft or Stranger Things.
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,207
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Post by RWA3006 on Jan 10, 2023 9:31:02 GMT -5
TURD TUESDAY This one must have been soft enough to splat into a pancake shape when it hit the ground.
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RWA3006
Cave Dweller
Member since March 2009
Posts: 4,207
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Post by RWA3006 on Jan 10, 2023 9:33:07 GMT -5
I believe this side is the bottom because I can see the impression of how it molded to a reverse image of the terrain.
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