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Dakota Sandstone Leaves (Updated Withadditional Slab)


Ramo

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The other day "Missing Digits" and I found ourselves in an awesome place for some Dakota sandstone leaf impressions. Thought I'd post a couple pictures of some of what we found. I don't know much about these leaves, but now I'm wanting to know a little more. The last two pictures are "before and after" some prep on one I packed out.

Ramo

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Edited by Ramo

For one species to mourn the death of another is a new thing under the sun.
-Aldo Leopold
 

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impressive!

Grüße,

Daniel A. Wöhr aus Südtexas

"To the motivated go the spoils."

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Nice! Sassafras, isn't it?

"There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant

“Try to learn something about everything and everything about something.” - Thomas Henry Huxley

>Paleontology is an evolving science.

>May your wonders never cease!

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Nice! Sassafras, isn't it?

That's what I was thinking.

I finally got 'Oceans of Kansas', and have just begun reading it (at work on breaks).

It mentions the Dakota plant material and Sassafras is among the flora mentioned.

Nice finds you guys! :fistbump:

Edited by Bullsnake

Steve

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The large leaf is not a Sassafras, it's a three-lobed Platanus species very similar to Eoplatanus serrata. The three thick veins coalescing into one is the key feature for ID. This species can have multiple lobes and a serrated or smooth margin.

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image.png.a84de26dad44fb03836a743755df237c.png

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Considered this, I had, but look:

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3-into-1 happens more ways than one.

017.JPG

"There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant

“Try to learn something about everything and everything about something.” - Thomas Henry Huxley

>Paleontology is an evolving science.

>May your wonders never cease!

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I should have been more precise, the three veins coalesce at the petiole in Platanus, but not for Sassafras. Additionally, the veins on Platanus are much more robust.

image.png.a84de26dad44fb03836a743755df237c.png

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... the three veins coalesce at the petiole in Platanus, but not for Sassafras. Additionally, the veins on Platanus are much more robust.

I observe this to be the case here:

post-423-0-54824400-1395098003_thumb.jpg

I am probably wrong, but I want to learn :)

"There has been an alarming increase in the number of things I know nothing about." - Ashleigh Ellwood Brilliant

“Try to learn something about everything and everything about something.” - Thomas Henry Huxley

>Paleontology is an evolving science.

>May your wonders never cease!

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I observe this to be the case here:

~.JPG

I am probably wrong, but I want to learn :)

Eoplatanus / Platanus has some variability in the margins around the petiole, but in any event, the attachment point is quite different than Sassafras.

Attached for comparison is another example of a three-lobed Eoplatanus with a petiole attachment that matches well with the feature you highlighted.

post-4301-0-76295700-1395099877_thumb.jpg

image.png.a84de26dad44fb03836a743755df237c.png

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Thanks, guys. Learning more every post.

Piranha, can you post a picture of a sassafras leaf for comparison?

Ramo

For one species to mourn the death of another is a new thing under the sun.
-Aldo Leopold
 

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On 3/17/2014 at 6:22 PM, Ramo said:

Thanks, guys. Learning more every post.

Piranha, can you post a picture of a sassafras leaf for comparison?

Ramo

 

 

Hi Ramo,

 

Attached are a few examples of some three-lobed Sassafras leaves. I also included an image of Platanus nobilis (fig.4) for additional comparison.

 

IMG1.jpg

 

Brown, R.W. (1962)

Paleocene flora of the Rocky Mountains and Great Plains.

USGS Professional Survey Paper, 375:1-119

 

 

 

image.png.a84de26dad44fb03836a743755df237c.png

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Awesome find! I really like the almost perfect preservation of all of the veining

Im also enjoying learning from the experts how to ID different leaves.

~Charlie~

"There are those that look at things the way they are, and ask why.....i dream of things that never were, and ask why not?" ~RFK
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Beautiful finds, Ramo.

The human mind has the ability to believe anything is true.  -  JJ

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Thanks for posting these Ramo - very cool.

Congratulations on some really nice finds.

Regards,

    Tim    -  VETERAN SHALE SPLITTER

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I'm jealous Ramo...a classic locality that I've never hunted. On my "bucket list". We'll have to go pound some sandstone together when I'm out West next!

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Thanks Piranha, That's helps to explain. I have a few more leaves I need to prep, I may send you a PM or two as I get them worked.

Ramo

For one species to mourn the death of another is a new thing under the sun.
-Aldo Leopold
 

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Beautiful! I spend some time in my local Dakota outcrops and never thought to look for leaves. This is very cool to see.

"I am glad I shall never be young without wild country to be young in. Of what avail are forty freedoms without a blank spot on the map?"  ~Aldo Leopold (1887-1948) 

 

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Thought I'd add another couple pictures of a before, during and after prep of another large rock I hauled out.

I've hunted the Dakota sandstone for years, and only had one complete leaf and a hand-ful of pieces until now. Super excited to finally have some nice leaves. I just had to share.

Ramo

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For one species to mourn the death of another is a new thing under the sun.
-Aldo Leopold
 

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Looks like you're prepping that one with just a brush, meaning very unconsolidated. What is the next step, do you consolidate it with something? I imagine transportation will be pretty tricky without it.

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It is pretty soft, but I'm using a CP airscribe. The brush is just to clean all the debris off after the scribe work. The "leaf" surfaces are easy to separate from the sandstone, and there are some inclusions that are super hard in it other than that, it's fairly easy prep compared to limestone.

For one species to mourn the death of another is a new thing under the sun.
-Aldo Leopold
 

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