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Quartz pseudomorph after Red Spruce
  
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Roger Warin




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PostPosted: Nov 29, 2019 15:33    Post subject: Quartz pseudomorph after Red Spruce  

Hi,
I doubt the origin of this fossil wood. It’s a quartz pseudomorph after Red Spruce. Is it correct?
Thank you.



Bois-fossile-50421_R.jpg
 Mineral: Quartz after Red Spruce
 Description:
Yakima Ridge, Washington
Miocene
 Viewed:  416 Time(s)

Bois-fossile-50421_R.jpg


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Tracy




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PostPosted: Nov 29, 2019 16:01    Post subject: Re: Quartz pseudomorph after Red Spruce  

Hi Roger,

While I can say that, at a glance, it looks like Yakima Canyon (or other Washington State) wood, experience has taught me that appearance is is a highly unreliable identifier for petrified wood. Two logs recovered from the same site could look completely different, depends on a variety of factors including conditions under which the tree grew, health of the tree at the time it was buried by lava, how well preserved was the organic material, weathering/leaching patterns, and so on. If it doesn't come with a label I trust, I catalogue slabs as being of unknown locality. Not sure what is causing you to doubt the information in this case.

As for whether it's red spruce - needs to be studied under a microscope by someone with expertise identifying fossilized wood species. I personally don't know what types of trees were prevalent in this region, millions of years ago.

Cheers
Tracy

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Roger Warin




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PostPosted: Nov 29, 2019 16:23    Post subject: Re: Quartz pseudomorph after Red Spruce  

Many thanks Tracy.
Here is the partially erased label.
Roger.



84-Label-bois-fossile-50423_R.jpg
 Mineral: label
 Description:
 Viewed:  381 Time(s)

84-Label-bois-fossile-50423_R.jpg


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Tracy




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PostPosted: Nov 29, 2019 16:41    Post subject: Re: Quartz pseudomorph after Red Spruce  

Curious. "Yakima Ridge West" is awfully precise, almost suggests that the former owner dug it up personally or knew the finder. A quick Google told me there's a peak along the ridge called "Yakima Ridge-West" (the website is Peakbagger). But without absolute proof...will likely remain a mystery.
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R Saunders




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PostPosted: Nov 30, 2019 13:29    Post subject: Re: Quartz pseudomorph after Red Spruce  

looks like Wash for Washington. not west.
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Roger Warin




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PostPosted: Nov 30, 2019 14:33    Post subject: Re: Quartz pseudomorph after Red Spruce  

Thank you to all of you.
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Tracy




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PostPosted: Dec 02, 2019 11:20    Post subject: Re: Quartz pseudomorph after Red Spruce  

Hi again Roger,

As an aside, I'd be more skeptical of the tree species than of the locality. I checked with a friend of mine who confirmed that spruces were around in WA during the Miocene epoch (no idea whether they were common or rare), but mentioned that under int'l paleontology rules, the only way you can conclusively match a fossil and a modern tree species is if you find cones (= reproductive organs) with the log. you have to be able to demonstrate that the fossil tree would have been capable of pollinating the modern tree. Without a cone, it's only possible to identify the genus.

Consider changing your label to "quartz ps. after Picea Sp."

Cheers
Tracy

PS following your lead, I've merged my petrified wood collection with the quartz suite in my minerals collection. :)

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