Identifying Palaeolithic birch tar production techniques: challenges from an experimental biomolecular approach

Area of Science:

• Archaeology
• Paleoanthropology
• Organic Geochemistry

Background:

• Neanderthals produced birch bark tar as early as 190,000 years ago, indicating complex technological behavior.
• Understanding Neanderthal tar production methods is crucial for assessing their behavioral repertoire.
• Previous studies successfully used organic biomarkers to identify Neolithic tar production, but its applicability to Palaeolithic methods is uncertain.

Purpose of the Study:

• To determine if organic biomarkers can distinguish between different Palaeolithic (aceramic) birch bark tar production methods.
• To test the efficacy of Gas Chromatograph-Mass Spectrometry (GC-MS) in identifying ancient tar production techniques.
• To contribute to a broader understanding of early hominin technological capabilities.

Main Methods:

• Five distinct birch bark tar samples were produced using different methods.
• The biomolecular composition of each tar sample was analyzed using Gas Chromatograph-Mass Spectrometry (GC-MS).
• Biomarker data were compared to assess their utility in distinguishing production techniques.

Main Results:

• The organic biomarkers used to identify Neolithic tar production strategies with ceramic technology were not reliable for distinguishing Palaeolithic aceramic techniques.
• Analysis revealed limitations in current biomarker approaches for identifying early hominin tar production methods.
• The study highlights the need for expanded experimental data and publicly accessible datasets.

Conclusions:

• Current biomarker analysis methods are insufficient for identifying Palaeolithic birch bark tar production techniques.
• Further experimentation is necessary to create a comprehensive reference library of tar compositions.
• Open data sharing is essential for future comparative analyses in paleoanthropological research.