Pages

Guide to Patagonia's Monsters & Mysterious beings

I have written a book on this intriguing subject which has just been published.
In this blog I will post excerpts and other interesting texts on this fascinating subject.

Austin Whittall


Tuesday, December 15, 2020

130ky Cerutti site stone tools validated as made by human beings?


In April 2017 we posted about the Cerutti mastodon site in California, with its "stone tools" dated to 130,000 years ago.

An article (Raman and optical microscopy of bone micro-residues on cobbles from the Cerutti mastodon site) published this month, reports finding bone micro residues on the cobbles found next to the broken mastodon bones, suggesting that these were used as tools to break the bones open and not just a chance accumulation of stones and broken bones.


The abstract states:


"Cobbles from the Cerutti Mastodon (CM) site have impact marks and usewear suggesting that mastodon bones were placed on stone anvils and struck with stone hammers to produce two concentrations of broken bones and stones. Critics have suggested that the stones may have broken by rolling down slopes rather than in situ at the two concentrations. Our analysis of two cobbles (pegmatite CM-254 and andesite CM-281) identifies bone micro-residues that are not evenly distributed over the cobbles, and are unlikely to have been transferred from sediment or from passive contact with adjacent macro-bones. Bone micro-residues on cobble CM-254 were recovered from surfaces associated with usewear, but were absent from the naturally broken surface found in direct contact with a mastodon rib. In addition, bone micro-residues on cobble CM-281 were recovered from upward facing locations with impact marks and other usewear; but were absent on the downward facing surface. Bone micro-residues are absent in sediment away from the bone concentrations. These new data support the argument that the associated concentration of broken stones and mastodon bones is in situ, and that bones in this concentration were likely broken by the pegmatite cobble (comprising CM-254 and other fragments), when it struck mastodon bones placed on the andesite cobble CM-281. These findings add to the totality of evidence that supports human agency rather than geological processes as the driver responsible for the CM taphonomic pattern. "


Patagonian Monsters - Cryptozoology, Myths & legends in Patagonia Copyright 2009-2020 by Austin Whittall © 

No comments:

Post a Comment

Hits since Sept. 2009:
Copyright © 2009-2018 by Austin Victor Whittall.
Todos los derechos reservados por Austin Whittall para esta edición en idioma español y / o inglés. No se permite la reproducción parcial o total, el almacenamiento, el alquiler, la transmisión o la transformación de este libro, en cualquier forma o por cualquier medio, sea electrónico o mecánico, mediante fotocopias, digitalización u otros métodos, sin el permiso previo y escrito del autor, excepto por un periodista, quien puede tomar cortos pasajes para ser usados en un comentario sobre esta obra para ser publicado en una revista o periódico. Su infracción está penada por las leyes 11.723 y 25.446.

All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means - electronic, mechanical, photocopy, recording, or any other - except for brief quotations in printed reviews, without prior written permission from the author, except for the inclusion of brief quotations in a review.

Please read our Terms and Conditions and Privacy Policy before accessing this blog.

Terms & Conditions | Privacy Policy

Patagonian Monsters - http://patagoniamonsters.blogspot.com/