[dinosaur] Most precise dating of dinosaur fossils

To: <dinosaur-l@usc.edu>, <tholtz@umd.edu>, "Mike Taylor" <sauropoda@gmail.com>

Subject: [dinosaur] Most precise dating of dinosaur fossils

From: Poekilopleuron <dinosaurtom2015@seznam.cz>

Date: Tue, 20 Apr 2021 12:56:44 +0200 (CEST)

Delivered-to: dinosaur-l@mymaillists.usc.edu

Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=seznam.cz; s=beta; t=1618916206; bh=A8m/w6iN1v4bCqcARZaXGV7KRU4YE5g41CNR9DJYbhA=; h=Received:From:To:Subject:Date:Message-Id:Mime-Version:X-Mailer: Content-Type; b=hZr2ZThEi0vpo1D3wFMncKeA2fA/OohyGS3CIov9tEOIY/kUnKNgYyCD2eqrfqy/D T4SBw4QvGVrBADUX+DWLpafmFCgmJbDv/UWBIK+zjeigET+YHPlSuzRqwXvrQTTTUa eyYP2aYt/9ejBCrhHFQNvUtwcUh9jhhVfI2M4BXU=

List-archive: <http://mymaillists.usc.edu/sympa/arc/dinosaur-l>

List-help: <mailto:sympa@mymaillists.usc.edu?subject=help>

List-id: <dinosaur-l.mymaillists.usc.edu>

List-owner: <mailto:dinosaur-l-request@mymaillists.usc.edu>

List-post: <mailto:dinosaur-l@mymaillists.usc.edu>

List-subscribe: <mailto:sympa@mymaillists.usc.edu?subject=subscribe%20dinosaur-l>

List-unsubscribe: <mailto:sympa@mymaillists.usc.edu?subject=unsubscribe%20dinosaur-l>

Reply-to: Poekilopleuron <dinosaurtom2015@seznam.cz>

Sender: dinosaur-l-request@cal-mailinglists.usc.edu

Good day!

I apologise for my annoying curiosity, but I cannot resist to ask the honoured list members another question. What is the most precise dating of non-avian dinosaur fossil? I know there are dates going to just tenths of thousands of years, given for various formations and of course there is a dating of K-Pg event (about 66.04 mya). But would you really accept as a strong fact that say sauropod _Abydosaurus mcintoshi_ was 104.46 million years old (plus minus one million years)?

I've noticed there was a radiometric dating result going to even higher precision of just thousands of years, but I guess this was not something you could rely on simply because of the unavoidable error of radiometric time measumerents. Any thoughts on this? Thank you in advance! Tom