Re: [dinosaur] Dating of dinosaur age during history

By the way, you did not post the latest!

https://urldefense.proofpoint.com/v2/url?u=http-3A__www.stratigraphy.org_ICSchart_ChronostratChart2019-2D05.pdf&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=K8sCGlvUOc4JZtaKWBgC-s8jX7xQ9pCl0m-M6z8iJsg&s=tRXFtkZa9Ns-K0QSdZtnDvVH5v1Y7nJgTuKAeW2jpyw&e= 

(just go to stratigraphy.org and click on Chart/Time Scale to get the
latest)

On Fri, Nov 22, 2019 at 9:33 AM Robert Margulski <[email protected]>
wrote:

>
> All,
>
> I having trouble posting right now, please forward to the list if you deem
> it proper.
>
> Table of age estimates?
> I would go with the IUGS chart at:
>
> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.stratigraphy.org_ICSchart_ChronostratChart2018-2D07.pdf&d=DwIFaQ&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=K8sCGlvUOc4JZtaKWBgC-s8jX7xQ9pCl0m-M6z8iJsg&s=kb1WdegTZ7eoleoNHfKkg5gSwj5hnn9adID8ts0L-cc&e= 
>
>
> <https://urldefense.proofpoint.com/v2/url?u=http-3A__www.stratigraphy.org_ICSchart_ChronostratChart2018-2D07.pdf&d=DwMBAg&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=Ry_mO4IFaUmGof_Yl9MyZgecRCKHn5g4z1CYJgFW9SI&m=I072bzIUmWEtZfLh226FF48NyyVTHU3XQIY7v5PFWts&s=-9KgyOiuAS3Ub2nT19N9do3Azn0UBkFMIAgIuvteI3o&e=>How
> it has improved over time?
> I'd like to see that myself.
>
> Respectfully,
> Robert
>
>
> At 11:19 AM 11/21/2019, Merald Clark wrote:
>
> OMG Poekilopleuron, thank you!
> I've been wondering about this lately myself!
> Yours,
> Merald Clark
>
> On Wed, Nov 20, 2019 at 11:26 AM Poekilopleuron <
> [email protected]> wrote:
> Good day,
>
> I seem to recall that at the beginning of the 20th Century it was believed
> that Tyrannosaurus was only about 3 to 8 million years old (and
> Protoceratops about 13 million years after 1920). Is there any table of age
> estimates for dinosaurs and how it was improved during the time? E. g. how
> K-Pg boundary was dated from the 19th Century up to modern estimates of
> 66.0 mya. I have seen that around 1950 it was thought to be some 75 to 70
> million years ago? Thank you in advance! Tom
>
> "Be faithful in small things,
>  because it is in them that your strength lies."
>      Mother Teresa
>


-- 

Thomas R. Holtz, Jr.
Email: [email protected]         Phone: 301-405-4084
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