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Age of fossil fish scales and ammonites


Ozzie Sweetwater

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How do you know what age and time period these are from? I found them just outside of Billings Montana. 

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11 minutes ago, Ozzie Sweetwater said:

How do you know what age and time period these are from? I found them just outside of Billings Montana. 

You might find this tool useful to determine strata/age: https://macrostrat.org/map/#10/45.8039/-108.1068

 

(The benefit being that you can pinpoint the exact spot you found these!)

...How to Philosophize with a Hammer

 

 

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Yes, I attempted to look at a geologic map of the Billings area ( not easy on a small phone!) It shows many ages and strata for the area. You need to find the exact spot these were found to determine proper age of formation.

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28 minutes ago, Wolf52893 said:

What if it is not highlighted on the spot I collect at?

Just go to https://macrostrat.org/map/#3/40.80/-94.10

1. On the bottom right you can click or tap on the icon to call up the tools. 

2. Click or tap on the magnifying lens.

3. Input your location (or somewhere close).

4. You can zoom in and out, and move in any direction, just like Google Maps.

5. Once you come across your precise collecting spot, tap or click on it and a window pane comes up that will describe the strata.

  • I found this Informative 2

...How to Philosophize with a Hammer

 

 

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Can we get a detailed close up of the item I've circled? 

It looks more like a phyllocarid or conchostrachan, ... than a fish scale, at least in this picture.  :unsure: 

 

 

IMG_1135.thumb.JPG.32e0222546e96b3e28cbc8eb057ae27b.JPG   IMG_original-1135.thumb.JPG

    Tim    -  VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM  --- APRIL - 2015  

__________________________________________________
"In every walk with nature one receives far more than he seeks."

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One of the “scales” looks like an inarticulate brachiopod.

“...whilst this planet has gone cycling on according to the fixed law of gravity, from so simple a beginning endless forms most beautiful and most wonderful have been and are being evolved.” ~ Charles Darwin

Happy hunting,

Mason

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