May 22, 2024
Traces referential on raw material from Foz do Chapecó (Brazil)
- Lou Igier1,
- Lilla Tamara Jakab2,
- Vikram SHRESTHA1
- 1Muséum National d’Histoire Naturelle;
- 2Eötvös Loránd University
Protocol Citation: Lou Igier, Lilla Tamara Jakab, Vikram SHRESTHA 2024. Traces referential on raw material from Foz do Chapecó (Brazil). protocols.io https://dx.doi.org/10.17504/protocols.io.5qpvokynzl4o/v1
License: This is an open access protocol distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited
Protocol status: Working
We use this protocol and it's working
Created: April 20, 2024
Last Modified: May 22, 2024
Protocol Integer ID: 98540
Disclaimer
This protocol and experiments were conducted in the frame of the International Experimental Archeology 2024 course in Miskolc dispensed and supported by the Muséum National d’Histoire Naturelle, Eötvös Loránd University, Herman Ottó Múzeum, Miskolc Egyetem, Magyar Nemzeti Múzeum, Universitat Rovira i Virgili, Institut Català de Paleoecologia Humana i Evolució Social, Centre National de la Recherche Scientifique and Alliance Sorbonne Université.
We also give special acknowledgments to the professors and tutors that helped us conduct this project : Antony Borel, Julia Cabanès, David Pleurdeau, Gema Chacón, Delphine Vettese, Zsolt Mester and Peter Szolyák. This experiment could have not been conducted without the help of Nassim Zejly who produced the flakes. Finally, we also thank Antoine Lourdeau for providing with the raw materials from Foz do Chapecó.
Abstract
Quite a few lithic use-wear referentials on raw materials from Brazil exist. To further develop use-wear analysis in the country and especially in the region of Foz do Chapecó, new referentials must be created to better understand trace formation on these specific raw materials.
This protocol aims to use pieces in a sequential experiment to observe the initial development of wear traces. Given the short duration of the experiment, we do not expect to fully characterize the worked materials. Instead, our goal is to have a better understanding of the use-wear aspect on these raw materials, enabling us to identify relevant traces on archaeological artifacts.
Before start
Numerous flakes were produced on a volcano-sedimentary material from Foz do Chapecó. We then selected four pieces that looked appropriate for the experiment in term of size, prehension and edge sharpness.
Documentation of the experimental flakes before use
Documentation of the experimental flakes before use
Macroscopic and microscopic observation and documentation of the state of the flakes before use with naked eye, with a camera
Equipment
iPhone XR
NAME
Phone camera
TYPE
Apple
BRAND
1
SKU
and a Dino-lite microscope.
Equipment
Dino-Lite edge AM45152ZTL
NAME
Digital Microscop
TYPE
Dino-Lite
BRAND
3
SKU
Equipment
Dino-Lite AM7915MZTL
NAME
Digital microscop
TYPE
Dino-Lite
BRAND
4
SKU
Equipment
Dino-liteAM7515MT4A
NAME
Digital microscop
TYPE
Dino-lite
BRAND
5
SKU
Casting of the used experimental raw flakes after washing to keep record of the raw surface.
Equipment
Provil Novo silicone
NAME
Cartridge refill, light set
TYPE
Heraeus
BRAND
2
SKU
Sequential experiment : first session of use of the experimental flakes
Sequential experiment : first session of use of the experimental flakes
Session of scraping with two flakes on soaked reed and with two other flakes on fresh bone for 5,000 strokes each (document the time, the motion, the experimenter).
Documentation of the experimental flakes after use and before washing
Documentation of the experimental flakes after use and before washing
Macroscopic and microscopic observation and documentation of the used experimental raw flakes before washing with naked eye, a camera and a Dino-lite microscope.
Washing of the used experimental flakes
Washing of the used experimental flakes
Wash for 20 minutes in an ultrasound tank
Equipment
Ultrasonic cleaner USC100T
NAME
Ultrasonic tank
TYPE
VWR
BRAND
6
SKU
in a neutral soap solution diluted in distilled water (2%) to remove the residues.
15m
Documentation of the used experimental flakes after washing
Documentation of the used experimental flakes after washing
Macroscopic and microscopic observation and documentation of the used experimental raw flakes after washing with naked eye, a camera and a Dino-lite microscope.
Casting of the used experimental raw flakes after washing to keep record of the state development of the traces.
Sequential experiment : second session of use of the experimental flake
Sequential experiment : second session of use of the experimental flake
Session of scraping with one flake on soaked reed for 5000 strokes each (document the time, the motion, the experimenter).
Documentation of the experimental flake after use and before washing
Documentation of the experimental flake after use and before washing
Macroscopic and microscopic observation and documentation of the used experimental raw flakes with naked eye, with a camera and a Dino-lite microscope.
Washing of the used experimental raw flakes
Washing of the used experimental raw flakes
Wash for 20 minutes in an ultrasound tank in a neutral soap solution diluted in distilled water (2%) to remove the residues.
15m
Documentation of the experimental flakes after washing
Documentation of the experimental flakes after washing
Macroscopic and microscopic observation and documentation of the used experimental raw flakes after washing with naked eye, a camera and a Dino-lite microscope.